/usr/share/doc/libwt-doc/ReleaseNotes.html is in libwt-doc 3.3.4+dfsg-6ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 | <!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1" />
<style type="text/css">
dt { font-weight: bold; }
h3 { text-decoration: underline; }
dd { margin-top: 10px; margin-bottom: 10px; }
dd p { margin-top: 0px; }
dd div { margin: 10px 0px; }
</style>
<title>Wt Release notes</title>
</head>
<body>
<h1>Wt Release notes</h1>
This file lists important notes on migrating existing applications to
newer version of Wt. It lists changes in the library that may break
the way you build Wt, the way you configure Wt or the Wt API and
behaviour.
<h2>Release 3.3.4 (Mar 25, 2015)</h2>
<p>
This release has a focus on bug fixes but also one or two new new features,
of which the following are the most notable:
</p>
<dl>
<dt>
Support for dedicated session processes with wthttp connector.
</dt>
<dd>
Until now, only the FastCGI connector allowed the use of dedicated
processes for individual sessions, by spawning a new process for
each new session. This functionality has also been added to the
wthttp connector. In this implementation, the manager process will
act as a reverse proxy to the dedicated session processes.
This has as major benefit that there is no longer a choice between
dedicated session processes on the one hand (supported by FastCGI)
and support for WebSockets on the other hand (supported by the
built-in httpd). In fact, there remains little reason to prefer
FastCGI over the built-in httpd: in those situations where you
want a proper http server as a front-end, you can still use
HAproxy or NGINX (or Apache, if you must) as a reverse proxy to
wthttp.
</dd>
<dt>
<a href="classWt_1_1WIdentityProxyModel.html">WIdentityProxyModel</a>
</dt>
<dd>
This new proxy model simply forwards the structure of the source
model, without any transformation, and can be used for
implementing proxy models that reimplement data(), but retain all
other characteristics of the source model.
</dd>
<dt>
<a href="classWt_1_1Chart_1_1WAbstractChart.html#ac895fb1d1437f51629b49246eda66e3d">Chart::WAbstractChart::setAutoLayoutEnabled()</a>
</dt>
<dd>
Until now, you were responsible for configuring the padding around
the chart area to accomodate for axis labels, titles, and
legend. While this is still the default behaviour, we added an
option to let the chart derive the required padding (using
approximate font-metrics available server-side).
</dd>
<dt>
<a href="classWt_1_1Chart_1_1WCartesianChart.html#a1c97590b1bd4ee9324822967d6e72333">Chart::WCartesianChart::setAxis()</a>
</dt>
<dd>
Whereas previously a chart axis was a "value class", it is now a
proper polyymorphic class, and you can provide your own
implementation. In this way you can customize things like for
example label strings.
</dd>
<dt>
Several new features in the 3D charts library.
</dt>
<dd>
<ul>
<li><a href="classWt_1_1Chart_1_1WAbstractDataSeries3D.html#a0ac582c98fe58f36e0d60f11b5627656">
setPointSprite()</a>: ability to define sprites for drawing
a data series</li>
<li><a href="classWt_1_1Chart_1_1WAbstractGridData.html#a8f99da2ab56c80de400c90992c35f882">pickSurface()</a>:
find out which points on a surface are under a given pixel</li>
<li><a href="classWt_1_1Chart_1_1WAbstractGridData.html#afc0509b2dff1fa8dbb970266de21f7db">pickBar()</a>:
find out which points on a bar on are under a given pixel.</li>
<li><a href="classWt_1_1Chart_1_1WAbstractGridData.html#a09c065c802ff9b21d3c2a543e48f58b2">
setIsoLevels()</a>:
draw iso lines (on the ground plane of the chart) corresponding
to selected z values.</li>
<li><a href="classWt_1_1Chart_1_1WAbstractGridData.html#ad74945761f9bfcc2ced42487468c5480">
setClippingLinesEnabled()</a>:
ability to clip and optionally draw clipping planes
</li>
<li>
<a href="classWt_1_1Chart_1_1WCartesian3DChart.html#a8adb0ca981382e3e1435fe8e7fcf1d6e">
setIntersectionsEnabled()</a>:
ability to draw surface-surface intersection lines.
</li>
</ul>
</dd>
</dl>
<hr>
<h2>Release 3.3.3 (May 27, 2014)</h2>
<p>
This release has a focus on bug fixes but also one or two new new features:
</p>
<dl>
<dt>
Improved Meta header support.
</dt>
<dd>
Because WApplication meta header API was restricted to only work
in certain circumstances, we have now added the ability to define
meta headers (with the option to apply them to specific user agents)
also in the configuration file.
</dd>
<dt>
<a href="classWt_1_1WWidget.html#ab4086c221a56e81dd067be47303b5862">WWidget::setDeferredToolTip()</a>
</dt>
<dd>
This function is an alternative to setToolTip(), useful when a
tooltip text is not trivial to fetch or create. Using this
function, the tool tip (HTML) text can now be loaded on-demand
instead of needing to be preset on (each) widget. This also works
for tooltips set from a WAbstractItemModel using the
new <a href="group__modelview.html#ga1d77c4de293aebfacbdde124de06b8b0">ItemHasDeferredTooltip</a>
item flag.
</dd>
<dt>
<a href="classWt_1_1WLineEdit.html#ae599502e317ed79d5a1a54dae12d3d10">WLineEdit::setInputMask()</a>
</dt>
<dd>
Support for input masks was added, which guides the user to enter
data in the correct format.
</dd>
</dl>
<hr>
<h2>Release 3.3.2 (March 12, 2014)</h2>
<p>
This release has a focus on bug fixes and a few larger new developments.
</p>
<h3>A) New classes:</h3>
<dl>
<dt>
<a href="classWt_1_1Chart_1_1WCartesian3DChart.html">3D Charts
(Chart::WCartesian3DChart, ...)</a>
</dt>
<dd>
A 3D charting library was added, based on
<a href="classWt_1_1WGLWidget.html">WGLWidget</a>, and integrated
with the existing 2D charting framework.
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1JsonSerializer.html">Dbo::JsonSerializer</a>
</dt>
<dd>
This is a utility which serializes Dbo objects (including
relations) to JSon, leveraging the same persist() function used
for serialization to the database.
</dd>
</dl>
<h3>B) Main improvements:</h3>
<dl>
<dt>
<a href="classWt_1_1WBootstrapTheme.html">WBootstrapTheme</a>
</dt>
<dd>
Support for bootstrap version 3 was added, so now you have the
choice between botstrap version 2 or 3. Needless to say, you
should probably target version 3 for new development work if you
can live with its restricted browser support.
</dd>
<dt>
<a href="classWt_1_1WGLWidget.html">WGLWidget</a>
</dt>
<dd>
Next to the existing client-side WebGL-based implementation, a
server-side OpenGL-based implementation was added for fallback
scenarios where WebGL is not available, or when scene complexity
is so big that a server-side solution is simply better performing
because of lower bandwidth needed.
</dd>
<dt>
<a href="classWt_1_1WRasterImage.html">WRasterImage</a>
</dt>
<dd>
Next to the GraphicsMagick-based implementation, a skia-based
implementation has been added (which provides much higher
performance most notably on Windows platforms).
</dd>
<dt>
<a href="classWt_1_1WString.html">WString</a>
</dt>
<dd>
Until now, Wt defaults to the C++ global locale for conversion
between a string literal (std::string, const char *) and
WString. In practice, UTF-8 is an (increasingly) better choice
since UTF-8 is a pragmatic encoding covering the entire Unicode
range, and the encoding used by the library throughout. We've now
added a setDefaultEncoding() function which can be used to
configure the default encoding as UTF-8.
</dd>
<dt>
wthttp HTTP/WebSockets front-end server
</dt>
<dd>
We've given the http front-end a much needed overhaul, making it
deal better with long-lived connections typical for WebSockets
applications, and fix some nasty issues at the same time.
We also took the opportunity to optimize its performance by
reducing the number of system calls for writing request
responses, and by avoiding memory allocations during request parsing.
</dd>
</dl>
<h3>C) Non-backwards compatible changes</h3>
<dl>
<dt>
<a href="classWt_1_1WDatePicker.html">WDatePicker</a>,
<a href="classWt_1_1WDateEdit.html">WDateEdit</a>
</dt>
<dd>
The date pickers will now default to interpreting a single click
as a date selection and also closing the calendar.
</dd>
</dl>
<hr>
<h2>Release 3.3.1 (October, 16 2013)</h2>
<p>
This release has a focus on bug fixes and other cleanups after the big
changes that went into 3.3.0.
</p>
<h3>A) New classes:</h3>
<dl>
<dt>
<a href="classWt_1_1WLocalDateTime.html">WLocalDateTime</a>
</dt>
<dd>
So far, the library only provided date/time classes that dealt with
UTC time (or that at least is the intended use). In this release
we have added functionality to also deal with date's in a specific
time zone, which includes this new type as well as improvements in
WDateTime to convert to local date time, and time zone information
in WEnvironment and WLocale.
</dd>
</dl>
<h3>B) Main improvements:</h3>
<dl>
<dt>
<a href="classWt_1_1WComboBox.html">WComboBox</a>
</dt>
<dd>
The combo box now interprets LevelRole data to display headers
(using HTML <optgroup< elements). Another improvement is
that now the combobox saves its single selection while the model
is updated.
</dd>
<dt>
<a href="classWt_1_1WDialog.html">WDialog</a>
</dt>
<dd>
Modal dialogs can now be created and destroyed in any order
without confusing the 'silk screen'. We now also consistently
interpret an enter press in the dialog to invoke the default
button added to the dialog footer (if there is one).
</dd>
<dt>
<a href="classWt_1_1WMessageBox.html">WMessageBox</a>
</dt>
<dd>
Several improvements include the ability to indicate what buttons
are the default and escape buttons with setDefaultButton() or
button->setDefault() and setEscapeButton(), and the (long overdue)
implementation of icons!
</dd>
<dt>
<a href="classWt_1_1WTextEdit.html">WTextEdit</a>
</dt>
<dd>
We've added support for TinyMCE 4.
</dd>
<dt>
<a href="classWt_1_1Signal.html">Signal</a>
</dt>
<dd>
For boost versions 1.52 or later, we now support the
Boost.Signals2 library for the signals implementation.
</dd>
<dt>
<a href="namespaceWt_1_1Render.html">Render library</a>
</dt>
<dd>
We've added a CSS style sheet parser which will parse and apply
style rules in <style> blocks (or loaded through the API),
and expanded CSS support to much improvemed table rendering
(including border-collapse border model and repeated table
headers), relative/absolute positioning, and page-break-before/after
support.
</dd>
<dt>
<a href="classWt_1_1Auth_1_1AbstractUserDatabase.html">Auth::AbstractUserDatabase</a>
</dt>
<dd>
A setIdentity() method was added to modify an existing identity
(e.g. username) and updateAuthToken() was added to update an
existing token (e.g. keeping the expiration time but changing the
hash).
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1Query.html">Dbo::Query</a>
</dt>
<dd>
Added a reset() function which resets previous bound arguments.
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1QueryModel.html">Dbo::QueryModel</a>
</dt>
<dd>
The model now implements toRawIndex() and fromRawIndex() methods to
allow selection to persist across layout changes (e.g. resorting).
</dd>
<dt>
<a href="group__json.html">Wt::Json (JSON library)</a>
</dt>
<dd>
We've added serialization functions to complement the parsing API.
</dd>
<dt>
<a href="group__mail.html">Wt::Mail (SMTP library)</a>
</dt>
<dd>
We've added attachment support, and optional indication of the local
sender date.
</dd>
</dl>
<h3>C) Non-backwards compatible changes</h3>
<dl>
<dt>
<a href="classWt_1_1WDate.html">WDate</a>,
<a href="classWt_1_1WDateTime.html">WDateTime</a>
<a href="classWt_1_1WTime.html">WTime</a>
</dt>
<dd>
We've deprecated the exceptions (Invalid[Date][Time]Exception)
that were thrown by these classes when one attempted to compute or
use an 'invalid' value. These exceptions are no longer thrown.
Instead, we now documented what value
(usually 'null') is returned when one attempts to do operations on
such a date/time class, which makes the behaviour more consistent
with how Qt's equivalent classes behave.
</dd>
<dt>
<a href="classWt_1_1WMessageBox.html">WMessageBox</a></dt>
<dd>
The buttons() method has been renamed to standardButtons(), and
buttons() now return the actual list of added buttons.
</dd>
</dl>
<hr>
<h2>Release 3.3.0 (April, 8 2013)</h2>
<p>
This release focusses on a reorganization of Wt's theme
infrastructure, with the objective of
supporting <a href="http://twitter.github.com/bootstrap/">Twitter's
Bootstrap CSS framework</a> as a new theme. At the same time we've
added a number of widgets for which Twitter Bootstrap provides
styling.
</p>
<p>It is our intention to support the Bootstrap theme (or more
specifically, the Bootstrap class names) alongside the themes we
already supported (which are based on our own class names). Ignoring
what Bootstrap brings, you should be able to upgrade to this release
without too much trouble, although you may need to adapt some CSS
stylesheets as we did reorganize a number of things which were
required for Bootstrap and were a good idea for our own CSS
stlesheets too.</p>
<h3>A) New classes:</h3>
<dl>
<dt>
<a href="classWt_1_1WTheme.html">WTheme</a>,
<a href="classWt_1_1WCssTheme.html">WCssTheme</a>,
<a href="classWt_1_1WBootstrapTheme.html">WBootstrapTheme</a>,
</dt>
<dd>
Theme support classes for Wt. The role of a theme is to:
<ul>
<li>Load the CSS stylesheets for a new session</li>
<li>Annotate newly created widgets with appropriate style
classes</li>
</ul>
</dd>
<dt>
<a href="classWt_1_1WDateEdit.html">WDateEdit</a>
</dt>
<dd>
Functionally almost the same as a WDatePicker, this class
specializes WLineEdit and is thus a WFormWidget, making it much
easier to use in WTemplateFormView.
</dd>
<dt>
<a href="classWt_1_1WLocale.html">WLocale</a>
</dt>
<dd>
This class supports localization for number formatting and
extends the simple localization support we had in the previous
versions of Wt (which as only effect had the selection of
a different language for the resource bundles). It's main
added value of native C++ support for localization is that it
also affects client-side handling and parsing of number values,
i.e. in <a href="classWt_1_1WIntValidator.html">WIntValidator</a> and
<a href="classWt_1_1WDoubleValidato.htmlr">WDoubleValidator</a>.
</dd>
<dt>
<a href="classWt_1_1WNavigationBar.html">WNavigationBar</a>
</dt>
<dd>
A navigation bar styles a menu as a typical top-level bar
(currently only styled in the Bootstrap Theme).
</dd>
<dt>
<a href="classWt_1_1WPopupWidget.html">WPopupWidget</a>
</dt>
<dd>
A base class to simplify the creation of popup widgets that
typically assist in editing or provide circumstancial information
for another widget.
</dd>
<dt>
<a href="classWt_1_1WSplitButton.html">WSplitButton</a>
</dt>
<dd>
A split button, which combines a button and a popup menu
(currently only styled in the Bootstrap Theme).
</dd>
<dt>
<a href="classWt_1_1WToolBar.html">WToolBar</a>
</dt>
<dd>
A button tool bar (currently only styled in the Bootstrap Theme)
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1backend_1_1MySQL.html">Dbo::MySQL</a>
</dt>
<dd>
A MariaDB/MySQL backend for Wt::Dbo. This is based on the work
from Paul Harrisson who maintained this backend so far outside the
Wt distribution. The backend has been designed for MariaDB, but
should work fine for MySQL as well.
</dd>
</dl>
<h3>B) Main improvements:</h3>
<dl>
<dt>
<a href="classWt_1_1Mail_1_1Message.html">Mail::Message</a>
</dt>
<dd>
Added API support for additional SMTP headers.
</dd>
<dt>
<a href="classWt_1_1WDatePicker.html">WDatePicker</a>,
<a href="classWt_1_1WSuggestionPopup.html">WSuggestionPopup</a>
</dt>
<dd>
The setGlobalPopup() functionality has been deprecated and does no
longer have any effect, since a new improved algorithm is being
used to anchor the popup to the DOM which no longer requires this
workaround.
</dd>
<dt>
<a href="classWt_1_1WDialog.html">WDialog</a>
</dt>
<dd>
Addition of a footer() method that returns a container for dialog
footer elements, typically buttons.
</dd>
<dt>
<a href="classWt_1_1WFormModel.html">WFormModel</a>
</dt>
<dd>
Addition of a validator() function that returns the validator for
a field set using setValidator(),
</dd>
<dt>
<a href="classWt_1_1WGLWidget.html">WGLWidget</a>
</dt>
<dd>
Support for binary transfers which avoids serialization and
deserialization of floats to text.
</dd>
<dt>
<a href="classWt_1_1WPushButton.html">WPushButton</a>
</dt>
<dd>
A push button can now act as a toggle button, using setCheckable()
and related API (currently only styled in the Bootstrap Theme) and
can be linked to a popup menu using setMenu().
</dd>
<dt>
<a href="classWt_1_1WStackedWidget.html">WStackedWidget</a>
</dt>
<dd>
When switching between current widgets, the stacked widget will
now record and restore the current scroll position, providing a
much improved user experience when using the stacked widget for
the 'main' contents of an application.
</dd>
<dt>
<a href="classWt_1_1WStringListModel.html">WStringListModel</a>
</dt>
<dd>
Full support was added for storing data of all roles, lifting the
requirement to use another model such as WStandardItemModel for
simple MVC widgets like WComboBox or WSuggestionPopup simply to be
able to store UserRole data.
</dd>
<dt>
<a href="classWt_1_1WTemplate.html">WTemplate</a>
</dt>
<dd>
Added a new standard function (Functions::block) which allows the
definition and use of a macro block inside a placeholder, which is
in particular useful for forms which have repetitive formatting
for each field.
</dd>
<dt>
<a href="classWt_1_1WTemplateFormView.html">WTemplateFormView</a>
</dt>
<dd>
Several API improvements: A new setFormWidget() allows the
definition of the form widget for editing a field which
is a more useful alternative compared to reimplement
createFormWidget(). It also allows the optional
definition of functions to update the view/model values, which
avoids the need for specializing updateViewField() and
updateModelField() these latter two functions have been deprecated
in favour of two new functions updateViewValue() and
updateModelValue() which only update the value but not other
aspects such as visibility, validation state, or messages.
</dd>
<dt>
Built-in httpd improvements
</dt>
<dd>
A redundant copy operation of the response generated and sent by
Wt has been removed, using scatter-gather I/O implemented by
boost::asio instead.
</dd>
</dl>
<h3>C) Non-backwards compatible changes</h3>
<dl>
<dt>
<a href="classWt_1_1WMenuItem.html">WMenuItem</a>
</dt>
<dd>
While in previous version of Wt, this class was only a data class
that held the information related to an item, in 3.3.0 we modified
this so that this class represents the widget itself. If you were
redefining protected methods to customize the widget
(i.e. createItemWidget() and updateItemWidget()), then this will no
longer work as expected. The new system should be easier to
customize (since you can simply specialize WMenuItem itself).
In addition, we've simplified the rendering of a menu item so that
a redundant layer of spans (or div's) has been removed. It makes
the menu more consistent with the way CSS designers expect a menu
to rendered, and this was done (you can guess the theme of this
release by now ?) to be compatible with bootstrap's CSS styles.
</dd>
<dt>
<a href="classWt_1_1WApplication.html">WApplication::locale()</a>
</dt>
<dd>
This now returns a WLocale object instead of the string
designation of the locale (which you can query by calling name())
on the locale object.
</dd>
<dt>
<a href="classWt_1_1WCalendar.html">WCalendar</a>
</dt>
<dd>
The markup for this class has changed, and thus customized CSS
will need to be updated.
</dd>
<dt>
<a href="classWt_1_1WMenuItem.html">WPopupMenuItem</a>
</dt>
<dd>
The popup menu item class has been merged with WMenuItem (and
WPopupMenu is now a specialized WMenu). This should not have
noticable API changes, except for the changes in markup and CSS
documented above.
</dd>
<dt>
<a href="classWt_1_1WTreeNode.html">WTreeNode</a>,
<a href="classWt_1_1WTreeTable.html">WTreeTable</a>
<a href="classWt_1_1WTreeView.html">WTreeView</a>
</dt>
<dd>
The markup for tree rendering has been changed (to using nested
unordered list instead of nested tables), and thus customized CSS
will need to be updated. The only API consequence is that
WTreeNode::labelArea() is no longer returning a WTableCell but
instead a WContainerWidget.
</dd>
<dt>
<a href="classWt_1_1WTreeView.html">WTreeView</a>,
<a href="classWt_1_1WTableView.html">WTableView</a>
</dt>
<dd>
Event handling (clicked(), doubleClicked(), ... ) has been
generalized: events that are not generated on an item (but for
example in empty space below the items) will now also
generate these events, but then with an invalid model index.
You may thus need to adapt current code to check whether the model
index that is returned is valid.
</dd>
</dl>
<hr>
<h2>Release 3.2.3 (November, 1 2012)</h2>
<p>
This release contains mostly bug fixes and one new feature: a payment
processing API.
</p>
<h3>A) New namespaces:</h3>
<dl>
<dt>
<a href="group__payment.html">Wt::Payment (payment handling)</a>
</dt>
<dd>
This namespace contains services and back-end classes for dealing
with online payment brokers. At the moment there is support for
PayPal's Express Checkout service.
</dd>
</dl>
<h3>B) Main improvements:</h3>
<dl>
<dt>
Layout improvements.
</dt>
<dd>
<p>
If you had massive trouble migrating to 3.2.2 because of the
layout rewrite, then you'll appreciate the efforts we've made to
make the layout algorithms in 3.2.3 much more robust and
consistent.
</p>
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1QueryModel.html">Dbo::QueryModel</a>:
added a mechanism for stable row data.
</dt>
<dd>
<p>
A common nuisance when working with the QueryModel (which
retrieves data from the database as needed), is that concurrent
database modifications such as insertions of new data, may
interfere with the model's mapping of rows to objects (this is
in fact a common problem with most ORM's indeed). This mapping
may be important, especially when you want to process the user's
selection of one or more rows selected by the user, in e.g. a
table view. We've added a mechanism to assure that one can
request the model for data at a given row, which is guaranteed
to be the same row that has been previously retrieved, using the
stableResultRow() method. It works by default for simple queries
(returning data from one table), but can be easily customized
for more complex queries.
</p>
</dd>
<dt>
<a href="namespaceWt_1_1Render.html">Render library:</a>
improved support for %-based block sizes and table rendering
</dt>
<dd>
<p>
Support was added for %-based sizes for block widths and table
cell widths. In addition, table rendering in Wt::Render has been
improved to support repeating headers (<thead> sections)
for multi-page tables, and explicit page breaks (using the css
page-break-after/before properties).
</p>
</dd>
</dl>
<h3>C) Non-backwards compatible changes</h3>
<dl>
<dt>
<a href="classWt_1_1Dbo_1_1backend_1_1Sqlite3.html">Dbo::backend::Sqlite3</a>
</dt>
<dd>
<p>We've changed the implementation of the storage ISO8601AsText
format for time stamps (datetime). In the new, corrected,
implementation, we generate dates using 'T' as the separator
between date and time (as mandated by ISO8601), while the old
behaviour used a space (' ') instead as the
separator. Sqlite3 supports either format equally. This may
however break some applications which use queries for an exact
date (or a date comparison), as the results may be affected.
</p>
<p> The old behaviour is still available as PseudoISO8601AsText,
which can be configured using
<tt>connection.setDateTimeStorage(Wt::Dbo::SqlDateTime,
Wt::Dbo::backend::Sqlite3::PseudoISO8601AsText)</tt>
</p>
</dd>
<hr>
<h2>Release 3.2.2 (July, 23 2012)</h2>
<p>
This release contains mostly bug and feature improvements, but
also a rewrite of the layout managers in Wt (WBoxLayout and
WGridLayout), and this comes with some changes in (in most cases
previously undefined) behaviour.
</p>
<h3>A) New classes:</h3>
<dl>
<dt>
<a href="classWt_1_1WSslInfo.html">WSslInfo</a>
</dt>
<dd>
Class containing information on a client-side certificate that may
have been configured for a SSL connection, and which can be used
for authentication (accessible from
<a href="classWt_1_1WEnvironment.html">WEnvironment</a>).
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1weak__ptr.html">Wt::Dbo::weak_ptr</a>
</dt>
<dd>
A weak variant of Wt::Dbo::ptr which is used to implement
One-to-One relations (see also
<a
href="group__dbo.html#ga00a060d5f4764f673948989f21837548">Wt::Dbo::hasOne()
</a>).
</dd>
</dl>
<h3>B) Main improvements:</h3>
<dl>
<dt>
Rewrite of <a href="classWt_1_1WLayout.html">WBoxLayout, WGridLayout</a>
</dt>
<dd>
<p>
The layout managers have been reimplement, to address various
issues with the old implementation, including API (in particular the wonked
side-effects of AlignTop | AlignJustify) inconsistencies and bugs.
</p>
<p>The new implementation no longer uses tables when JavaScript
is available, but instead using JavaScript-based layout with
absolute positioning. The table-based implementation is still kept
for plain HTML sessions (and progressive bootstrap). The code now
uses exactly the same layout logic for both horizontal and
vertical layout (but giving precedence to horizontal layout) and
should be much more consistent (and perhaps also more
performant). However, because of the many complexities and
problems with the old code (inconsistent behaviour), you may see
issues while upgrading. Please see the "Non-backwards compatible
changes" below for hints on how to deal with this.</p>
</dd>
<dt>
<a href="classWt_1_1WAbstractItemView.html">WAbstractItemView</a>
</dt>
<dd>
<p>
A drag & drop mime-type can now be specified on a per-item
basis using a new <a
href="group__modelview.html#ga0ae864e12320f9f89172735e075ed068">ItemDataRole</a>,
and the mime-type for the entire selection is computed
from these individual mime-types.
</p>
</dd>
<dt>
<a href="classWt_1_1WInteractWidget.html">WInteractWidget</a>
</dt>
<dd>
A new method <a href="classWt_1_1WInteractWidget.html#a60423e777cffa89e6d1373fd25754099">setMouseOverDelay()</a> allows to specify a delay for
generating the mouseWentOver() event.
</dd>
<dt>
<a href="classWt_1_1Auth_1_1AbstractUserDatabase.html">Auth::AbstractUserDatabase</a>
</dt>
<dd>
A new method <a href="classWt_1_1Auth_1_1AbstractUserDatabase.html#a5067e569748cfad8c3356735a33aa10f">deleteUser()</a> was added, which deletes a user and all
related authentication information.
</dd>
<dt>
<a href="classWt_1_1Chart_1_1WCartesianChart.html">Chart::WCartesianChart</a>
</dt>
<dd>
A new method <a href="classWt_1_1Chart_1_1WCartesianChart.html#aa6c394c4d9a801d088b7b02c3fd66b28">setAxisPadding()</a> was added, which configures the
amount of adding between the chart area and the axes.
</dd>
<dt>
<a href="classWt_1_1Chart_1_1WDataSeries.html">Chart::WDataSeries</a>
</dt>
<dd>
A new method <a href="classWt_1_1Chart_1_1WDataSeries.html#ab0dbcd9bcbc0f39a042eb36aa930def4">setCustomMarker()</a> was added which allows the use of a
user-defined path for the markers. A new role
MarkserScaleFactorRole was added which allows overriding the
marker size based on item model data.
</dd>
</dl>
<h3>C) Non-backwards compatible changes</h3>
<dl>
<dt>
<a href="classWt_1_1WLayout.html">WBoxLayout, WGridLayout</a>
</dt>
<dd>
While migrating old code to this version, here are some tips:
<ol>
<li><p>Alignment flags</p>
<p>Previously, specifying an alignment for a widget in a
layout, or for the layout when set to a container, had a double
meaning. Not only would it implement the given alignment but also
revert to passively letting HTML layout decide the layout of the
contents, and adjust the parent (layout respectively container)
accordingly. This had all kinds of side effects such as not
propagating the size of layout-size-aware widgets and quirks in
the vertical alignment.</p>
<p><a href="classWt_1_1WContainerWidget.html#aff9884c8efdf90974077e96bcb1701db">WContainerWidget::setLayout(layout, alignment)</a> has been
deprecated and will be removed from a future release. This call
was almost always used to let the parent container resize to fit
the size of the contained children, instead of fitting children
in the parent container. This behaviour is now
automatically deduced based on an (empty) size of the parent
container. In case this heuristic does not work, then setting a
non-0 maximum size on the container using <a href="classWt_1_1WWebWidget.html#a9b83805a5b8090d296ae4b5939fc9d11">setMaximumSize()</a> will
act as a trigger, with the added benefit that the parent will only
be allowed to resize up to a specified maximum size.</p>
<p>An alignment specified in
<a href="classWt_1_1WBoxLayout.html#a7c1ec58e25d0b7add93f5f4342844db6">W(Box/Grid)Layout::addWidget(widget, stretch, alignment)</a> now
purely affects the alignment but has no other side effects. The
perferred and minimum sizes of a child widget or layout is now
always taken into account.</p>
</li>
<li><p>Child item sizes</p>
<p>The layout algorithm is now implemented entirely in
JavaScript, and is more gentle when dealing with a combination
of cells (or columns/rows) that have a stretch factor and others
that don't. Previously, a minimum (or fixed) size would be used
to layout items that do not have a stretch factor. This had for
example as a consequence that a WText would be narrowed down to its
minimum width by using word wrapping throughout. Now, the
preferred size is used for a child item, and shrinking to a minimum
size only if necessary.</p>
<li><p>Progressive bootstrap</p>
A layout in the first page of an application rendered using
progressive bootstrap will no longer fully upgrade to a full
JavaScript version, but will result in a hybrid (between
table-based and JavaScript-based). If it doesn't work out as you'ld
expect, then you should reconsider the use of progressive bootstrap,
or the use of a layout manager in your first page.
</li>
</ol>
</dd>
</dl>
<hr>
<h2>Release 3.2.1 (March 16, 2012)</h2>
<p>
This release contains mostly bug and feature improvements.
</p>
<h3>A) New classes:</h3>
<dl>
<dt>
<a href="classWt_1_1WFormModel.html">WFormModel</a>
</dt>
<dd>
A model class for forms. These models are used in Wt::Auth as the
basis for RegistrationModel and AuthModel, and allow a more
straight-forward customization of the underlying behavior of these
forms.
</dd>
<dt>
<a href="classWt_1_1WReadOnlyProxyModel.html">WReadOnlyProxyModel</a>
</dt>
<dd>
A proxy model class which allows to share a source model
read-only between multiple sessions.
</dd>
<dt>
<a href="classWt_1_1WTemplateFormView.html">WTemplateFormView</a>
</dt>
<dd>
A WTemplate-based standard view implementation that works in conjunction
with WFormModel.
</dd>
<dt>
<a href="classWt_1_1Auth_1_1AuthModel.html">Auth::AuthModel</a>
</dt>
<dd>
A model that implements authentication logic.
</dd>
<dt>
<a href="classWt_1_1Auth_1_1FacebookService.html">Auth::FacebookService</a>
</dt>
<dd>
An OAuth-2.0 based authentication service implementation for
Facebook.
</dd>
<dt>
<a href="namespaceWt_1_1Utils.html">Wt::Utils</a>
</dt>
<dd>
This namespace contains a number of utility functions that we
found useful in projects using Wt. They relate mostly to
lower-level encoding and decoding functions: base64-, hex-, html-,
and url-encoding/decoding.
</dd>
</dl>
<h3>B) Main improvements:</h3>
<dl>
<dt>
<a href="classWt_1_1WApplication.html">WApplication</a>
</dt>
<dd>
A new method, WApplication::bind(), is useful in combination with
WServer::post() to avoid posting to a method of a deleted object,
leveraging the same life-time tracking as with signal connections.
</dd>
<dt>
<a href="namespaceWt_1_1Render.html">Render library</a>
</dt>
<dd>
A large number of performance improvements, especially for table
layout and rendering.
</dd>
<dt>
<a href="classWt_1_1Chart_1_1WAxis.html">Chart::WAxis</a>
</dt>
<dd>
DateScale and DateTimeScale axes have improved auto-configuration of
limits and timesteps, now taking into account the resolution.
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1Transaction.html">Dbo::Transaction</a>
</dt>
<dd>
We've modified the default transaction outcome: a transaction will
now automatically commit(), unless the transaction is being
destroyed (goes out of scope) because an exception is being
thrown, in which case the transaction will rollback(). Previously,
an uncomitted transaction would always rollback() on destruction.
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1ptr.html">Dbo::ptr</a>
</dt>
<dd>
Added a session() method, returning the session with which the
session has been associated.
</dd>
<dt>
Shipped SHA-1 implementation.
</dt>
<dd>
We now ship a SHA-1 implementation with Wt and this thus relaxes
the need for OpenSSL to implement WebSockets and
Auth::SHA1HashFunction.
</dd>
</dl>
<h3>C) Non-backwards compatible changes</h3>
<dl>
<dt>
<a href="classWt_1_1WTextEdit.html">WTextEdit</a>
</dt>
<dd>
Due to backwards incompatiblity of IE9, we now require the latest
version of TinyMCE (3.5b1 or later).
</dd>
<dt>
<a href="classWt_1_1Auth_1_1AuthWidget.html">Auth::AuthWidget</a>
</dt>
<dd>
A number of API methods that configure and access the configuration
were moved to the new Auth::AuthModel class which can be accessed from
the widget using model().
</dd>
<dt>
<a href="classWt_1_1Auth_1_1AbstractPasswordService_1_1AbstractStrengthValidator.html">Auth::AbstractPasswordService::AbstractStrengthValidator</a>
</dt>
<dd>
The API was simplified to be less unorthodox: validate() now
returns a Result that contains all the information for it.
</dd>
<dt>
<a href="classWt_1_1Http_1_1Client.html">Http::Client</a>
</dt>
<dd>
We've changed the signature of the parseUrl() utility function to
parse the URL into a URL structure instead of a collection of
string parameters.
</dd>
</dl>
<hr>
<h2>Release 3.2.0 (November 29, 2011)</h2>
<p>
This release contains a number of new modules, as well as the usual
batch of <a href="http://redmine.emweb.be/versions/show/13">bug
fixes</a> and small feature improvements.
</p>
<p>
In this release we also change the WValidator API in a way that it
is likely to break existing applications.
</p>
<h3>A) New namespaces:</h3>
<dl>
<dt>
<a href="group__json.html">Wt::Json (JSON handling)</a>
</dt>
<dd>
This namespace contains classes (Object, Value, Array) which map
the JSON types in C++. It also contains a parser to deserialize
JSON. A writer to serialize to JSON hasn't been added yet.
</dd>
<dt>
<a href="group__mail.html">Wt::Mail (SMTP protocol)</a>
</dt>
<dd>
This namespace contains a Client to send mail messages. It is
currently offering only limited functionality w.r.t. SMTP protocol
handling, but contains enough functionality to send standards
compliant plain-text/HTML mails, with full support for unicode.
</dd>
<dt>
<a href="group__auth.html">Wt::Auth (Authentication)</a>
</dt>
<dd>
<div>This namespace contains model and view classes for
authentication. It implements password authentication using best
practices, email verifiation, remember-me tokens, and provisions
support for federated login with an implementation of OAuth 2.0
for authentication using third party identity providers.</div>
<div>We expect that the API may still evolve, especially with
respect to OAuth 2.0 (which is a draft protocol), and its use
for OpenID Connect, which is the main use case for OAuth within
the authentication module.</div>
</dd>
</dl>
<h3>B) New classes:</h3>
<dl>
<dt>
<a href="classWt_1_1WException.html">WException</a>
</dt>
<dd>
We have cleaned up the use of exceptions within Wt. We have
converted numerous cases where an exception used to be thrown to
error logging, if the exception was thrown to indicate an API
problem. When the API problem is not resulting in a corrupt state,
we now log the error instead of terminating the session. All other
cases now use an exception that implements WException. This does
not affect situations where a std::exception was advertised in the
API.
</dd>
<dt>
<a href="classWt_1_1WIOService.html">WIOService</a>
</dt>
<dd>
<div>
Previously, boost::asio was used only in the built-in httpd as a
portable asynchronous I/O reactor implementation. We have now
moved this into the Wt library itself, where it is now used
instead of a dedicated thread pool for dispatching requests (and
other server events), and where it is also used for asynchronous
I/O by e.g. the Http::Client.
</div>
<div>
The WIOService specializes a boost::asio::service, and integrates
the thread pool that runs the service.
</div>
</dd>
<dt>
<a href="classWt_1_1WStringStream.html">WStringStream</a>
</dt>
<dd>
This is a utility class that we have used since long in Wt. It is
a more efficient replacement for std::stringstream, with mostly a
compatible API (at least for our purposes). For our purposes it is
typically a factor of two or more faster.
</dd>
<dt>
<a href="classWt_1_1Http_1_1Client.html">Http::Client</a>,
<a href="classWt_1_1Http_1_1Message.html">Http::Message</a>
</dt>
<dd>
<div>We have added an implementation of a Http(s) client. The client
is intended for consuming web services in Wt, and handles GET or
POST requests. It is not suitable (yet) for large responses, since
it buffers the entire response internally.</div>
<div>The client uses asynchronous I/O, using the WIOService that is
found in the current WServer instance.</div>
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1backend_1_1Firebird.html">Dbo::Firebird</a>
</dt>
<dd>
<div>Lukasz Matuszewski contributed a Firebird backend
implementation, thanks !</div>
</dd>
</dl>
<h3>C) Main improvements:</h3>
<dl>
<dt>
<a href="classWt_1_1WAbstractItemView.html">WAbstractItemView</a>
</dt>
<dd>
Added a setHeaderWordWrap() method which configures header text
word wrapping, and changed setHeaderAlignemnt() so that it now
allows to change both the horizontal and vertical alignment. This
replaces the previously interwoven API for both features using the
multiLine parameter in setHeaderHeight(), which has been
deprecated. The rendering of the header items has been
reimplemented, simplified, and cleaned up in the process, avoiding
rendering problems on IE browsers.
</dd>
<dt>
<a href="classWt_1_1WApplication.html">WApplication</a>
</dt>
<dd>
Two new methods, deferRendering() and resumeRendering() can be
used to defer the rendering phase in response to the current
event-loop request. This is useful for situations where you are
waiting for an asynchronous operation to complete, but want to
handle this synchronously in the user-interface (i.e. blocking the
interface until the operation completes). While this is not a good
idea in general, it may be useful if you can guarantee that the
event will arrive within an acceptible time (e.g. 1 second). This
effectively stalls the response to the current request, but avoids
blocking threads in the process.
</dd>
<dt>
<a href="classWt_1_1WDialog.html">WDialog</a>
</dt>
<dd>
Added setClosable(), which adds a close icon into the title bar.
</dd>
<dt>
<a href="classWt_1_1WFormWidget.html">WFormWidget</a>
</dt>
<dd>
We have cleaned up the use of exceptions within Wt. We have
converted numerous cases where an exception used to be thrown to
error logging, if the exception was thrown to indicate an API
problem. When the API problem is not resulting in a corrupt state,
we now log the error instead of terminating the session. All other
cases now use an exception that implements WException. This does
not affect situations where a std::exception was advertised in the
API.
</dd>
<dt>
<a href="classWt_1_1WLogger.html">WLogger</a>
</dt>
<dd>
<div>
We have reorganized the logging within Wt. Internally, a number
of macros are now used for logging, with as default
implementation our own (simple) logger, but which can be
redefined to use instead another logging framework of your
choice, as some have rightfully requested.
</div>
<div>
But we've also improved our logger so that it now can be
configured to filter only certain information, based on type and
scope. This is mostly useful for debuggin and development of Wt
itself, since it allows us to switch on debugging output, in a
fine-grained way, in a debug build.
</div>
<div>Finally, a new global function has been added (Wt::log()) which
selects an appropriate logger for logging and is more convenient
than WApplication::log() which required an application instance.
</div>
</dd>
<dt>
<a href="classWt_1_1WTemplate.html">WTemplate</a>
</dt>
<dd>
<div>Arguments to bound functions are now parsed and passed to
the resolveString() methods.</div>
<div>Two new constructs have been added: conditions and
functions. Conditions allow certain parts of a template to be
skipped or included based on a bound condition. Functions are
useful to automatically resolve certain variables, two built-in
functions are implemented: one to resolve strings in a message
resource bundle ("tr"), and another to resolve the id of a bound
widget ("id").
</div>
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1collection.html">Dbo::collection<T></a>
</dt>
<dd>
We've added front() methods that return the first element.
</dd>
<dt>
Built-in httpd connector
</dt>
<dd>
We have expanded the WebSockets implementation to cover newer
versions of the WebSockets protocol (draft): next to 00, we now
also support 07, 08 and 13 protocols (with draft-17 semantics).
</dd>
<dt>
Configuration
</dt>
<dd>
On UNIX-like platforms, and using the built-in httpd connector,
SIGHUP is caught in the WServer::waitForShutdown() utility function,
and the configuration file (wt_config.xml) is reread.
</dd>
<dt>
Several security improvements
</dt>
<dd>
<dl>
<dt>DoS mitigation</dt>
<dd>We have added two measures to prevent DoS attacks that try
to exhaust the server by spawning sessions. This is in
particular a risk when deploying using the progressive bootstrap
method, since then a plain HTML session can be spawned with a
single request.
<ul>
<li>Plain sessions may be limited to constitute only a
fraction of the total number of sessions. This is configured
using the <plain-ajax-sessions-ratio-limit>
configuration option.</li>
<li>Ajax sessions need to confirm their "intelligence" by
solving a puzzle which requires them to properly parse the
(ever-changing) JavaScript and HTML.</li>
</ul>
</dd>
<dt>Compromised session ID risk reduction</dt>
<dd>
A compromised session ID no longer can be used to hijack that
session.
<ul>
<li>A full page refresh (using the session ID to rerender
the current application state) is no longer allowed unless
both client IP address and user-agent are unchanged. To
still enable page refresh in this situation, you may
configure the use of a cookie which can be used to confirm
the original browser (although that cookie will not be
used for session tracking), using the
<session-id-cookie> setting.</li>
<li>
The session ID cannot be used to POST events to an Ajax
session, since these require proof of other ever-changing
context specific information, notably a pageId and ackId.
</li>
</ul>
</dd>
</dl>
</dd>
</dl>
<h3>D) Non-backwards compatible changes</h3>
<dl>
<dt>
Build options
</dt>
<dd>The HTTP_WITH_SSL option has been removed, and is now replaced
by WT_WITH_SSL -- OpenSSL is now a dependency of Wt inherited by
the httpd.
</dd>
<dt>
<a href="classWt_1_1WValidator.html">WValidator</a>
</dt>
<dd>
We broke the validate() method, to return a new WValidator::Result
instead of WValidator::State. The main improvement is that the
validation may also return a text which contains information on
why validation failed. This makes the API consistent with the
client-side API, and obviously much more useful. It will break
existing application that call validate() or have reimplemented
validate() in a custom validation class.
</dd>
<dt>
<a href="classWt_1_1Test_1_1WTestEnvironment.html">WTestEnvironment</a>
</dt>
<dd>
This class has moved to a pseudo-connector library
(libwttest). This was needed to be able to use asynchronous I/O
(such as Http::Client) in test cases, which rely on a WIOService
fournished by a WServer instance.
</dd>
</dl>
<hr>
<h2>Release 3.1.11 (September 23, 2011)</h2>
<p>
This release
contains <a href="http://redmine.emweb.be/versions/show/12">many
bug fixes</a> and a few new features.
</p>
<h3>A) New classes:</h3>
<dl>
<dt>
<a href="classWt_1_1WLink.html">WLink</a>
</dt>
<dd>
This class unifies the different link types used in Wt, in a
single value class. Depending on the context, a link may refer to
a URL, a resource, or an internal path. We've updated the API
throughout to replace the function overloads for these different
cases with a single usage of WLink, simplifying the API (but don't
worry, we left the old methods, albeit depricated).
</dd>
<dt>
<a href="classWt_1_1WMediaPlayer.html">WMediaPlayer</a>
</dt>
<dd>
A media player has been added which provides a unified framework
for playing audio and video, and which deals with cross-browser
issues (chosing a suitable implementation per browser). We've also
renamed WHTML5Audio, WHTML5Video, and WHTML5Media to WAudio,
WVideo and WAbstractMedia respectively (since well, everything
will eventually be HTML5, no ?).
</dd>
</dl>
<h3>B) Main improvements:</h3>
<dl>
<dt>
<a href="classWt_1_1WResource.html">WResource</a>,
<a href="classWt_1_1Http_1_1ResponseContinuation.html">Http::ResponseContinuation</a>
</dt>
<dd>
Currently, you can already stream the output of a big resource in
little chunks, using a continuation to resume sending the next
part. We've now added API methods
(WResourceContinuation::waitForMoreData() and
WResource::haveMoreData()) to allow a resource to suspend its
response because it is currently lacking more data, to continue
later when new data is available (and without tying up a thread).
</dd>
<dt>
<a href="classWt_1_1WDialog.html">WDialog</a>
</dt>
<dd>
Added an option setResizable() which puts a resize handle in the
bottom right corner.
</dd>
<dt>
<a href="classWt_1_1WPopupMenu.html">WPopupMenu</a>,
<a href="classWt_1_1WPopupMenuItem.html">WPopupMenuItem</a>
</dt>
<dd>
Added a triggered() signal, and an option to automatically cancel
the popup menu when the mouse leaves the menu (after a
delay). We've also added the possibility to link a popup menu item
with a WLink, and the option to make the item which has a submenu
item also itself selectable.
</dd>
<dt>
Dbo::Session
</dt>
<dd>
The load() method has an additional, optional parameter, to force
rereading the copy from the database.
</dd>
<dt>
Dbo::collection<C>
</dt>
<dd>
Added a count() method which uses a query to determine whether the
collection contains an element.
</dd>
<dt>
Test::WTestEnvironment
</dt>
<dd>
Added dialogExecuted() and popupExecuted() methods which allow to
interact with a reentrant eventloop from a test plan.
</dd>
</dl>
<h3>C) Non-backwards compatible changes</h3>
The item data roles InternalPathRole and UrlRole have been removed,
and replaced by a LinkRole (which contains a WLink value instead).
<h3>D) Deprecated API</h3>
With the introduction of WLink, the following API is being deprecated
(although it can be argued that some of these may be kept for
convenience):
<ul>
<li>
WAbstractArea::setRef(): use WAbstractArea::setLink() instead.
</li>
<li>
WAbstractArea::ref(): use WAbstractArea::link() instead.
</li>
<li>
WAbstractArea::setResource(): use WAbstractArea::setLink() instead.
</li>
<li>
WAbstractArea::resource(): use WAbstractArea::link() instead.
</li>
<li>
WAnchor::setRef(): use WAnchor::setLink() instead.
</li>
<li>
WAnchor::ref(): use WAnchor::link() instead.
</li>
<li>
WAnchor::setResource(): use WAnchor::setLink() instead.
</li>
<li>
WAnchor::resource(): use WAnchor::link() instead.
</li>
<li>
WAnchor::setRefInternalPath(): use WAnchor::setLink() instead.
</li>
<li>
WImage::setImageRef(): use WImage::setImageLink() instead.
</li>
<li>
WImage::imageRef(): use WImage::imageLink() instead.
</li>
<li>
WImage::setResource(): use WImage::setLink() instead.
</li>
<li>
WImage::resource(): use WImage::link() instead.
</li>
<li>
WStandardItem::setInternalPath(): use WStandardItem::setLink() instead.
</li>
<li>
WStandardItem::internalPath(): use WStandardItem::link() instead.
</li>
<li>
WStandardItem::setUrl(): use WStandardItem::setLink() instead.
</li>
<li>
WStandardItem::url(): use WStandardItem::link() instead.
</li>
</ul>
The following classes have been renamed, and the old name is being
deprecated:
<ul>
<li>
WHTMLMedia is now WAbstractMedia.
</li>
<li>
WHTMLVideo is now WVideo
</li>
<li>
WHTMLAudio is now WAudio
</li>
</ul>
<hr>
<h2>Release 3.1.10 (July 8, 2011)</h2>
<p>
This release contains a mix of new features and bug fixes
</p>
<h3>A) New classes:</h3>
<dl>
<dt>
<a href="classWt_1_1WAnimation.html">WAnimation</a>
</dt>
<dd>
We have added support for animations to show or hide widgets (used
in <a href="classWt_1_1WWidget.html#a66bdda41220267a8c7ff9865996e2675">WWidget::setHidden()</a>,
and <a href="classWt_1_1WStackedWidget.html">WStackedWidget</a>). These
animations will only be used when the browser supports CSS3
animations (at the moment of writing that includes latest Firefox,
Chrome and Safari releases).
</dd>
<dt>
<a href="classWt_1_1WStreamResource.html">WStreamResource</a>
</dt>
<dd>
Dmitriy Igrishin factored this out of the WFileResource since most
of its functionality (continuations, range support) could be
generalized to streaming from a std::istream.
</dd>
</dl>
<h3>B) Main improvements:</h3>
<dl>
<dt>
Allowing multiple WServer instances.
</dt>
<dd>
Apparently for no good reasons at all, some singletons were still
around which prevented you from instantiating
multiple <a href="classWt_1_1WServer">application servers</a>. Now
you can (but only using the built-in httpd) instantiate multiple
servers side by side in the same process, which may server the
same or different web applications over different ports. A feature
example (<tt>multiple_servers</tt>) shows how that works.
</dd>
<dt>
Internal path encoding in WTemplate and WText</a>
</dt>
<dd>
<div>
The
new <a href="classWt_1_1WTemplate.html#aeee888e560c519ac0e33bfc1ebb315e2">setInternalPathEncoding()</a>
method will, if needed, enable reencoding of <a> anchors
which reference internal paths consistent with how in the
current session internal paths need to be dealt with (which
depends on whether the browser supports Ajax and HTML5 History).
</div>
<div>
Since this requires an additional XML parsing step (but the
rapidxml parser that is used is ... rapid !), it is off by
default.
</div>
</dd>
<dt>
<a href="classWt_1_1WWApplication.html">WApplication::findWidget()</a>
</dt>
<dd>
Like WWidget::findWidget(), but on the whole application,
including widgets outside the WApplication::root().
</dd>
<dt>
<a href="classWt_1_1WWApplication.html">WApplication::changeSessionId()</a>
</dt>
<dd>
Generates a new session ID for the application. This is useful to prevent
session fixation attacks by changing the session ID when a user has
authenticated successfully.
</dd>
<dt>
<a href="classWt_1_1WResource.html">WResource::setDispositionType()</a>
</dt>
<dd>
This method allows to specify how the browser should preferably
show a (non-HTML) resource.
</dd>
<dt>
<a href="classWt_1_1WTable.html">WTable</a>
</dt>
<dd>
Methods were added
to <a href="classWt_1_1WTable.html#a239d85781509ff321eb964af042bcf57">move
a row</a>
or <a href="classWt_1_1WTable.html#a0670b90a05a6c0176c773bf8766a5bf2">a
column</a>. In addition we added methods
to <a href="classWt_1_1WTableRow.html">WTableRow</a>
and <a href="classWt_1_1WTableColumn.html">WTableColumn</a> for
accessing cells in the given row or column.
</dd>
<dt>
<a href="classWt_1_1WTextEdit.html">WTextEdit</a>
</dt>
<dd>
Various improvements to allow more flexible access to TinyMCE
settings on a per-instance basis.
</dd>
<dt>
<a href="classWt_1_1WWidget.html">WWidget::setToolTip()</a>
</dt>
<dd>
An additional argument was added which may specify the use of
XHTML tooltips, which are implemented using a <div>.
</dd>
<dt>
Dbo::collection<T>
</dt>
<dd>
Make insert() and erase() also work for a collection involved in a
1-N relation
</dd>
<dt>
Dbo::ptr<C>
</dt>
<dd>
Improved modify() behaviour returns a proxy object which marks the
the object dirty also from its destructor, avoiding situations where
the transaction is flushed during a modification and remainig changes
are forgotten.
</dd>
<dt>
Dbo::Dbo<C>
</dt>
<dd>
Added setDirty() and self() methods.
</dd>
<dt>
Dbo::backend::Sqlite3
</dt>
<dd>
The packaged sqlite3 version was bumped from 3.6.20 to 3.7.6
</dd>
</dl>
<h3>C) Non-backwwards compatible changes</h3>
<dl>
<dt>The signature of the virtual method WWidget::setHidden() has changed.</dt>
<dd>
Probably the biggest breaking change since long, this was needed
to add support for animations. This will break existing code which
specializes the WWidget::setHidden() method. This code should be
updated to pass the WAnimation object.
</dd>
</dl>
<hr>
<h2>Release 3.1.9 (April 7, 2011)</h2>
<p>
This release contains mostly bug fixes and quality improvements.
</p>
<h3>A) New classes:</h3>
<dl>
<dt>
<a href="classWt_1_1WAbstractSpinBox.html">WAbstractSpinBox</a>,
<a href="classWt_1_1WDoubleSpinBox.html">WDoubleSpinBox</a>
</dt>
<dd>
Refactored and reimplemented the spinbox control into an integer
and floating point version, which may be implemented either using
a native HTML5 element or a portable Wt implementation.
</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
<dl>
<dt>
Internal path handling: HTML5 History API
</dt>
<dd>
<div>
When the browser supports the HTML5 History API, URLs are now the
same for plain HTML and Ajax-enabled session (i.e. without the '#'
trick). This can improve load time and improves the
user-experience.
</div>
<div>
To avoid problems of resolving resources with relative URLs, a
new property 'baseURL' can be used (that can be configured in
wt_config.xml), which allows all relative URLs be resolved from
the same location.
</div>
</dd>
<dt>
Internal path handling: no ugly internal paths ('?_=/path')
</dt>
<dd>
The configuration option (--docroot) for the built-in
httpd allows to specify folders with static paths and when doing
so, all other requests are forwarded to the application, which in
turn does no longer need to rely on the ugly '?_=' query parameter
to encode its internal paths.
</dd>
<dt>
<a href="classWt_1_1WPdfImage.html">WPdfImage</a>, <a href="classWt_1_1WRasterImage.html">WRasterImage</a>
</dt>
<dd>
Improved font support: the library can be optionally built to use
libpango for resolving characters to glyphs. This allows text to
be rendered using a mix of different fonts that all provide only
partial coverage for the entire unicode range. Note that for
WPdfImage, this currently requires use of a libharu fork
(https://github.com/kdeforche/libharu/tree/)
</dd>
<dt>
<a href="classWt_1_1WAbstractItemView.html">WAbstractItemView</a>,
WTableView and WTreeView
</dt>
<dd>
Implementation of setRowHeaderCount() which fixes the number of
columns that are used as row headers and remain fixed while
scrolling horiziontally through the table. This replaces the now
deprecated setColumn1Fixed() API.
</dd>
<dt>
<a href="classWt_1_1WRasterImage.html">WRasterImage</a>
</dt>
<dd>
Several quality improvements: correct rendering of alpha
compositing, text rendering by libpango,
</dd>
<dt>
<a href="classWt_1_1WSlider.html">WSlider</a>
</dt>
<dd>
The slider has been reimplemented to allow for using either the
native HTML5 slider control, or the Wt implementation. The Wt
implementation can now also be styled through CSS.
</dd>
<dt>
<a href="classWt_1_1WServer.html#abca6890dab44d87bd3af64705ac072d3">WRun()</a>,
<a href="classWt_1_1WServer.html#a84f84652ccb139850adcf5ea75f50fa5">WServer::addEntryPoint()</a>
</dt>
<dd>
The callback function is now a boost::function<> object, allowing
you to bind other variables into the callback function.
</dd>
<dt>
<a href="classWt_1_1WServer.html#a2894484a9661d728dc9aa60ba79bb570">WServer::post()</a>
</dt>
<dd>
A safe method to post events to a session, and a useful
alternative to WApplication::UpdateLock. The simplechat and
codeview examples were converted to illustrate this method rather
than the (dead-lock prone) WApplication::UpdateLock approach.
</dd>
<dt>
<a href="classWt_1_1WString.html#abcff7d3d30972762bd5d9279dc903a36">WString::trn()</a>
</dt>
<dd>
Implementation of plural string resolution, with locale-dependent
rules. The implementation provided
by <a href="classWt_1_1WMessageResourceBundle.html">WMessageResourceBundle</a>
allows the same kind of expressions as GNU ngettext().
</dd>
<dt>
<a href="classWt_1_1Chart_1_1WAxis.html#ab36cb584a0aa8bdcc1c3212a9304e6cd">Chart::WAxis::setResolution()</a>
</dt>
<dd>
Allows to specify the minimum chart axis resolution (contributed by Gaetano Mendola).
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1Transaction.html">Dbo::Transaction</a>
</dt>
<dd>
Fixed an issue with internal inconsistencies after transaction rollback.
</dd>
</dl>
<h3>C) Non-backwwards compatible changes</h3>
<dl>
<dt>Changed i18n keys for <tt>Wt.WDate.Mon-Sun</tt>
and <tt>Wt.Date.Jan-Dec</tt></dt>
<dd>
We were pointed out the fact that the built-in i18n keys for WDate
month names had a collision for the month 'May', which had the
same key for the abbreviated 3-letter variant as the full length
variant. Therefore in this release we reformatted the abbreviated
3-letter variant keys to <tt>Wt.WDate.3.Mon-Sun</tt>
and <tt>Wt.WDate.3.Jan-Dec</tt>. You will need to update your own
languages copies of these (or better, contribute them and we'll
maintain them for you!).
</dd>
</dl>
<h3>D) Android and iPad/iPhone targets</h3>
<p>This release contains initial work on supporting Android and
iPad/iPhone as targets for deploying Wt applications within a webkit
view widget.</p>
<p>For iPad/iPhone, we added a script that builds Wt as an OSX Framework
which may be used in XCode to build iOS applications.</p>
<p>For Android, we added support for building the library and examples as
shared objects which are packaged together with a small Java project
which instantiates a WebView, into standalone APK files.</p>
<p>This is ongoing work. We need to improve support in Wt for Mobile
Webkit to make the applications look and behave more as native
applications on these devices.</p>
<hr>
<h2>Release 3.1.8 (Feb 4, 2011)</h2>
<p>
This release contains mostly bug fixes, quality improvements,
and a few new features.
</p>
<h3>A) New classes:</h3>
<dl>
<dt><a href="classWt_1_1WFontMetrics.html">WFontMetrics</a></dt>
<dd>
A font metrics class. Font metrics are only available for
WPdfImage, and an implementation is planned for WRasterImage.
</dd>
<dt><a href="classWt_1_1Render_1_1WTextRenderer.html">Render::WTextRenderer</a>,
<a href="classWt_1_1Render_1_1WPdfRenderer.html">Render::WPdfRenderer</a></dt>
<dd>
A renderer class for a subset of XHTML, useful for e.g.~generating
PDF reports.
</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
<dl>
<dt>
<a href="classWt_1_1WAbstractItemView.html#ad11215811b4de66f3d3c4267b694fe38">WAbstractItemView::setHeaderItemDelegate()</a>
</dt>
<dd>
Rendering of header cells is now also delegated and can be customized.
</dd>
<dt>
<a href="classWt_1_1WAbstractItemView.html#a027a8ad4967a0e269bdabbffca15f489">WAbstractItemView::scrollTo()</a>
</dt>
<dd>
Scroll to a particular item.
</dd>
<dt>
<a href="classWt_1_1WApplication.html#a44c5f0398b5539269be3961b26e95b08">WApplication::setLayoutDirection()</a>
</dt>
<dd>
Added support for Right-To-Left (mirrored) layouts, typically used
with some middle-Eastern languages. In addition to HTML's built-in
support for RTL directionality, layout managers, tables and MVC
tree/table views render their columns in the opposite order.
</dd>
<dt>
<a href="classWt_1_1WBoxLayout.html">WBoxLayout, WGridLayout, WBorderLayout</a>
</dt>
<dd>
Empty layout items do longer create padding, and thus padding
collapses around empty items (both horizontally and vertically).
</dd>
<dt>
<a href="classWt_1_1WEvent.html">WEvent::eventType()</a>
</dt>
<dd>
Information on the event type may be used during WApplication::notify()
for e.g. detecting user activity.
</dd>
<dt>
<a href="classWt_1_1WGoogleMap.html">WGoogleMap</a>
</dt>
<dd>
Added support for Google API version 3, alongside version 2.
</dd>
<dt>
<a href="classWt_1_1WPdfImage.html">WPdfImage</a>
</dt>
<dd>
Added support true type font loading, a UTF8 patch for libharu is
pending to enable full unicode support text rendering.
</dd>
<dt>
<a href="classWt_1_1WWidget.html#afc4bfcc92fa39010cac8775f3332dfa5">WWidget::setWidth()</a>,
<a href="classWt_1_1WWidget.html#a7d82ee32496743fdd28b30461f95d5ec">WWidget::setHeight()</a>
</dt>
<dd>
Convenience methods for resize() for only width or height.
</dd>
<dt>
<a href="classWt_1_1Chart_1_1WCartesianChart.html">Chart::WCartesianChart</a>
</dt>
<dd>
A number of methods to customize the location and look of the legend.
</dd>
<dt>
<a href="classWt_1_1Chart_1_1WDataSeries.html#a9361e12e94699f59090ae8ac3a4921df">Chart::WDataSeries::setXSeriesColumn()</a>
</dt>
<dd>
Allow use of a specific X series for each data series in scatter plots.
</dd>
<dt>
<a href="group__dbo.html#ga0f2f0c37d44f27e151b8f12412240731">Dbo::belongsTo()</a>, <a href="group__dbo.html#ga0d0cbc70dcfebc659ea1662e9327c90c">Dbo::hasMany()</a>
</dt>
<dd>
Support for foreign key constraints (NotNull, OnDeleteCascade, etc...).
</dd>
<dt>
<a href="group__dbo.html#ga0f2f0c37d44f27e151b8f12412240731">Dbo::Session::rereadAll()</a>
</dt>
<dd>
Can be optionally given a single table name to reread (discard) all object
data from a single class/table.
</dd>
<dt>
<a href="structWt_1_1Dbo_1_1sql__value__traits.html">Dbo::sql_value_traits<bool>, Dbo::sql_value_traits<long></a>
</dt>
<dd>
Added mappings for C++ <tt>bool</tt> and <tt>long</tt> types.
</dd>
</dl>
<h3>C) API and other changes:</h3>
<dl>
<dt>
CORS (Cross-Origin Resource Sharing)
</dt>
<dd>
A communication method between browser and server is now chosen
based on the needs (same origin or cross-origin), and based on
browser support. Cross-Origin requests are now supported for both
Ajax and WebSockets, and are are chosen if available and needed,
reverting to dynamic script-tags otherwise.<br/>
The WApplication::setAjaxMethod() has no effect anymore, and has
been deprecated.
</dd>
<dt>
Bootstrap process has changed.
</dt>
<dd>
While tracking bootstrapping problems on IE8 (resulting in a blank
page instead of a shiny app), we not only found a good workaround
for that, but also found a way to implement the default bootstrap
mode so that the stylesheets are applied before the application is
rendered. This solves the annoying flicker you experienced with
the default bootstrap mode, and also allows us to remove a number
of workarounds for IE. As a result of various cleanups, more CSS
stylesheet rules have been pushed out to the external wt.css
(theme) stylesheet. If you've created your own theme, you will
need to take note.
</dd>
<dt>
<a href="group__painting.html#gaf67a889bc5e9f8ab3a59fe58b0fa2128">Wt::BrushStyle</a>
</dt>
<dd>
Wt::WBrushstyle has been renamed to Wt::BrushStyle. This makes it
consistent with the naming conventions of other enums. Sorry, our
mistake !
</dd>
</dl>
<hr />
<h2>Release 3.1.7 (Nov 26, 2010)</h2>
<p>
This release contains mostly bug fixes, quality improvements,
and a few new features.
</p>
<p>
Note: the package was updated (3.1.7a) on Nov 30 to fix a layouting
regression.
</p>
<h3>A) New classes:</h3>
<dl>
<dt><a href="classWt_1_1WGLWidget.html">WGLWidget</a></dt>
<dd>
A preview of WebGL support in Wt (work in progress).
</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
<dl>
<dt>
<a href="classWt_1_1WAbstractItemView.html#a120156dc59eaf3608916b679d937c5b8">WAbstractItemView</a>
</dt>
<dd>Added API for hiding columns.</dd>
<dt>
<a
href="classWt_1_1Chart_1_1WCartesianChart.html">WCartesianChart</a>,
<a
href="classWt_1_1Chart_1_1WCartesianChart.html">WPieChart</a>
</dt>
<dd>
Added support for ToolTipRole data, using WAbstractArea interactive areas.
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1Session.html#ad59da4e078a4e6532da698425193bbdb">Dbo::Session::rereadAll()</a>
</dt>
<dd>
Reread all transient objects, as a catch-all solution to stale
data (data modified in another session).
</dd>
<dt>
<a href="classWt_1_1WInteractWidget.html#ac7d10a6cae1e23a791b44c0682a3c627">WInteractWidget</a>
</dt>
<dd>Added support for touch and gesture events (Mobile webkit).</dd>
</dl>
<h3>C) Misc:</h3>
<dl>
<dt>
WebSocket protocol support (experimental)
</dt>
<dd>Use of WebSocket for communication between browser and server
can now be used, by enabling <web-sockets> in the
configuration file (we're likely to turn this on by default in a
future version. There is automatic fallback to the current
XMLHttpRequest based communication if WebSockets are not available
or communication could not be established. WebSockets is only
available using the built-in httpd server (which is now also a
WebSocket server).</dd>
<dt>
Build improvements
</dt>
<dd>
<ul>
<li>Provide a workaround for broken g++ compiler shipped in Ubuntu
Maverick</li>
<li>Provide support for building without using
std::wstring (-DWT_NO_STD_WSTRING) or std::locale
(-DWT_NO_STD_LOCALE=OFF) support.
</li>
</ul>
</dd>
</dl>
<hr />
<h2>Release 3.1.6 (Oct 29, 2010)</h2>
<p>
This release contains a healthy mix of bug fixes, quality improvements,
and new features. And hopefully no regressions :-)
</p>
<h3>A) New classes:</h3>
<dl>
<dt><a href="classWt_1_1SyncLock.html">SyncLock<Lock></a></dt>
<dd>
A dead-lock avoidance adaptor for a Boost mutex lock, which provides
a controlled way of releasing the current application lock.
</dd>
<dt><a href="classWt_1_1WProgressBar.html">WProgressBar</a></dt>
<dd>
A progress bar, contributed by Thomas Suckow.
</dd>
<dt><a href="classWt_1_1WSpinBox.html">WSpinBox</a></dt>
<dd>
A spin box.
</dd>
<dt><a href="structWt_1_1boost__any__traits.html">boost_any_traits<Type></a></dt>
<dd>
A traits class for customized interpretation of data stored in a
boost::any. You can register a new type using <a href="group__modelview.html#ga91842a84102ee15d41102ccf0745f4e4">registerType<Type></a>.
</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
<dl>
<dt>
Native support for MSIE 9
</dt>
<dd>
MSIE 9 (Beta) is now supported in all its goodness, including support
for HTML5 canvas and (almost working) support for SVG.
</dd>
<dt>
<a href="classWt_1_1WApplication_1_1UpdateLock.html">
WApplication::UpdateLock</a>
</dt>
<dd>The lock is now a RIAA lock, getUpdateLock() has been deprecated.
The lock needs also to be tested against validity (using operator bool()):
when invalid the session that it is trying to lock is being destroyed.</dd>
<dt>
<a href="classWt_1_1WApplication.html#a506978cfb884af4bc6ffd5a5bc8476d6">WApplication::setConfirmCloseMessage()</a>
</dt>
<dd>Provide the user with a message to confirm navigating away from the
application.</dd>
<dt>
<a href="classWt_1_1WApplication.html#a9a4048e01b69a536e35f47eb2a59a69b">WApplication::unload()</a>
</dt>
<dd>Rather then waiting for the session to expire, an application
that is navigated away iis now notified of this and will by
default <tt>quit()</tt>.</dd>
<dt>
<a href="classWt_1_1WApplication.html#a149412d829d104621c445bc10604be53">WApplication::addMetaHeader()</a>
</dt>
<dd>Can now be used to specify "http-equiv" meta headers too.</dd>
<dt>
<a href="classWt_1_1WDatePicker.html#acda30d9035692895a2bb94090babc073">WDatePicker::changed()</a>
</dt>
<dd>I wonder how we ever did without.
</dd>
<dt><a href="classWt_1_1WAbstractArea.html#a3dbe39c26769a63e4bf63020e31e9f22">WAbstractArea::mouseWheel()</a>,
<a href="classWt_1_1WInteractWidget.html#a656a0e4d5af72af0190d84dedf0093c6">WInteractWidget::mouseWheel()</a>,
<a href="classWt_1_1WMouseEvent.html#a4354738e0bce7e57764a465f5e19895d">WMouseEvent::wheelDelta()</a></dt>
<dd>
Added mouseWheel() event.
</dd>
<dt><a href="classWt_1_1WFileUpload.html">WFileUpload</a></dt>
<dd>
Added support for the simultaneous upload of multiple files (HTML5
"multiple") attribute and showing a progress bar to show upload
progress.
</dd>
<dt><a href="classWt_1_1WFormWidget.html">WFormWidget::hasFocus()</a></dt>
<dd>
Returns whether the widget currently has the keyboard focus.
</dd>
<dt><a href="classWt_1_1WHTML5Media.html">WHTML5Media</a></dt>
<dd>
Added events to catch play, pause, play-back progress and volume
changes.
</dd>
<dt><a href="classWt_1_1WLineEdit.html">WLineEdit</a>, <a href="classWt_1_1WTextArea.html">WTextArea</a></dt>
<dd>
Added <tt>currentPosition()</tt>, <tt>selectionStart()</tt>,
<tt>selectedText()</tt>, and <tt>hasSelectedText()</tt> methods to retrieve
the current cursor position and selection.
</dd>
<dt><a href="classWt_1_1WPushButton.html#aa5830a2118836423f0c16d12bbfd57a0">WPushButton::setRef()</a></dt>
<dd>
Utility method to create an anchor that looks like a button, or a
button that behaves like an anchor, depending on your point of
view. There is also <tt>setResource()</tt> to set a resource as
target.
</dd>
<dt>
<a href="classWt_1_1WResource.html">WResource</a>
</dt>
<dd>Added API for upload progress tracking.</dd>
<dt>
<a href="classWt_1_1Http_1_1Request.html">Http::Request</a>
</dt>
<dd>Added support for HTTP request byte ranges, and this is now
interpreted by both the WFileResource and built-in httpd for static
files.
</dd>
<dt>
<a href="classWt_1_1Http_1_1Response.html">Http::Response</a>
</dt>
<dd>Added <tt>setContentLength()</tt> which allows you to specify the
lenght of the response in advance, proving a better user experience
for large downloads.
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1Session.html#8712ff0d59f7bb6a4d2986ad9637cc9e">Dbo::Session::query()</a>
</dt>
<dd>Switched to a more complete Boost.Spirit parser for SQL queries, which
understands most of the SQL syntax, including functions,
"with ... select ... ".
</dd>
<dt>
<a href="classWt_1_1Dbo_1_1QueryModel.html">Dbo::QueryModel</a>
</dt>
<dd>Added support for custom column header names and changing the
undelrying query using setQuery() while preserving the current
column definitions.</dd>
<dt>
<a href="classWt_1_1Dbo_1_1SqlStatement.html">Dbo::SqlStatement</a>
</dt>
<dd>Added boost::posix_time::time_duration type support.</dd>
<dt>
<a href="structWt_1_1Dbo_1_1sql__value__traits.html">Dbo::sql_value_traits<WTime></a>
</dt>
<dd>Added template specialization for WTime.</dd>
</dl>
<hr />
<h2>Release 3.1.5 (Sep 10, 2010)</h2>
<p>
This release contains mostly bug fixes.
</p>
<h3>A) Main Changes</h3>
<dl>
<dt><a href="classWt_1_1WGridLayout.html">WGridLayout</a>,
<a href="classWt_1_1WBoxLayout.html">WBoxLayout</a></dt>
<dd>Optimized client-side rendering performance. Previously, every layout
manager used would automatically slowdown every event because it would try
to relayout each time. This is no longer the case.</dd>
<dt><a href="classWt_1_1WSocketNotifier.html">WSocketNotifier</a></dt>
<dd>The socket notifier has been resurrected (it was in an perpetual state
of brokeness) and now works reliably across targets.</dd>
</dl>
<h3>B) Changes that may break existing applications:</h3>
<h4>1) Built-in resource bundles</h4>
Starting with this version, Wt uses an internal message resource
bundle for the few strings it provides by itself (like for example
'Ok' for the ok button in a WMessageBox, or the days-of-week in WDate).
Previously, an ugly API was used in <a href="classWt_1_1WMessageBox.html">WMessageBox</a>,
<a href="classWt_1_1WCalendar.html">WCalendar</a>,
and <a href="classWt_1_1WDatePicker.html">WDatePicker</a>
using a boolean 'i18n' parameter in the constructor. All this has now been removed,
and instead the keys for these built-in strings have been documented. If you were
using these classes your application will no longer build, you can simply remove the
internationalization parameter and you will need to fix the keys you used for the
messages according to the documentation.
Any localized strings you use will take precedence over these built-ins.
All affected classes (only those listed above actually have changed API and behaviour) are:
<dl>
<dt><a href="classWt_1_1WAbstractItemView.html">WAbstractItemView</a></dt>
<dd>the paging tool bar buttons for graceful callback.</dd>
<dt><a href="classWt_1_1WCalendar.html">WCalendar</a></dt>
<dd>because of WDate</dd>
<dt><a href="classWt_1_1WDate.html">WDate</a> and <a href="classWt_1_1WDateTime.html">WDateTime</a></dt>
<dd>week days, month names</dd>
<dt><a href="classWt_1_1WDatePicker.html">WDatePicker</a></dt>
<dd>because of WCalendar and for the close button</dd>
<dt><a href="classWt_1_1WDefaultLoadingIndicator.html">WDefaultLoadingIndicator</a></dt>
<dd>loading text</dd>
<dt><a href="classWt_1_1WInPlaceEdit.html">WInPlaceEdit</a></dt>
<dd>save and cancel button text</dd>
<dt><a href="classWt_1_1WMessageBox.html">WMessageBox</a></dt>
<dd>standard buttons</dd>
<dt><a href="classWt_1_1WOverlayLoadingIndicator.html">WLoadingIndicator</a></dt>
<dd>standard buttons</dd>
<dt><a href="classWt_1_1WValidator.html">Validators</a></dt>
<dd>for the messages they display in case of error</dd>
</dl>
<h4>2) Other behavioural changes</h4>
<dl>
<dt><a href="structWt_1_1WDialog.html">WDialog</a></dt>
<dd>Escape will no longer result in the dialog being rejected. You can
enable this behaviour using the rejectWhenEscaped() method.
</dd>
</dl>
<hr />
<h2>Release 3.1.4 (Aug 13, 2010)</h2>
<p>
This release contains several new features, but also a few changes
that break backwards compatibility (but are unlikely to affect an
average application).
</p>
<h3>A) New classes:</h3>
<dl>
<dt><a href="classWt_1_1WBatchEditProxyModel.html">
WBatchEditProxyModel</a></dt>
<dd>A proxy model that caches editing operations to commit them atomically.
</dd>
<dt><a href="classWt_1_1WHTML5Audio.html">WHTML5Audio</a></dt>
<dd>Audio support using the HTML5 audio tag.</dd>
<dt><a href="classWt_1_1WPdfImage.html">WPdfImage</a></dt>
<dd>A WPaintDevice that writes to Pdf (using libharu).</dd>
<dt><a href="classWt_1_1WRasterImage.html">WRasterImage</a></dt>
<dd>A WPaintDevice that writes to a Png/Gif (using GraphicsMagick).</dd>
<dt>ISAPI connector</dt>
<dd>(Windows only) a connector that implements the Microsoft ISAPI
API, to integrate directly into Microsoft IIS. On Windows, this is
an alternative deployment option next to the built-in httpd.</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
<dl>
<dt>
<a href="classWt_1_1WAbstractItemView.html">WAbstractItemView</a>
</dt>
<dd>Added support for validators while editing.</dd>
<dt>
<a href="classWt_1_1WApplication.html#88b082dadadd3fb7dbe10887e7d89c91">WApplication</a>
</dt>
<dd>Added an appRoot() method this returns the value of the
special property "approot" which can in some cases be defined
implicitly by a connector (such as ISAPI), and which allows an
application to reference working files whereas previously it was
assumed that they were in the working directory (CWD).</dd>
<dt>
<a href="classWt_1_1WEnvironment.html#fd8726dfa8cabcb49895df4a6112ef48">WEnvironment::agent() and related</a>
</dt>
<dd>Convenience methods that return pre-parsed user agent identification,
should you want to differentiate based on browser.</dd>
<dt>
<a href="classWt_1_1WWidget.html#bb5949e98f47edb7db98d7b6df07a31c">WWidget::addStyleClass()</a>, <a href="classWt_1_1WWidget.html#3b8a35e37ef06c408f346c63a5f1aa8e">WWidget::removeStyleClass()</a>
</dt>
<dd>Added addStyleClass() and removeStyleClass() methods.</dd>
<dt>
<a href="classWt_1_1WMenu.html">WMenu, WMenuItem</a>
</dt>
<dd>Added support for closable and disabled items (not complete,
CSS is lacking for polished theme). Contributed by Dmitriy Igrishin.</dd>
<dt>
<a href="classWt_1_1WModelIndex.html#93c11e136a0fdc596eb745cc7fce7033">WModelIndex</a>
</dt>
<dd>Added support for in-place (destructive) encoding to and
decoding from a raw index, making this less of a hassle for View
classes.</dd>
<dt>
<a href="classWt_1_1WSortFilterProxyModel.html">WSortFilterProxyModel</a>
</dt>
<dd>Added support for row insertion/removal.</dd>
<dt>
<a href="classWt_1_1WSuggestionPopup.html">WSuggestionPopup</a>
</dt>
<dd>Allow usage as an advanced combo-box, with an explicit drop down
button and ability to react to a selection.</dd>
<dt>
<a href="group__dbo.html#gc98c1f90b00ed9ce243c6412da3ac489">Dbo::id()</a>
</dt>
<dd>Support for natural keys (possibly of composite type) next to the
built-in surrogate keys.</dd>
<dt>
<a href="structWt_1_1Dbo_1_1dbo__traits.html">Dbo::dbo_traits<C></a>
</dt>
<dd>By specializing this traits class, you can modify the surrogate id
field name (or disable it), and the optimistic version lock field
name (or disable it).</dd>
<dt>
<a href="classWt_1_1Dbo_1_1Session.html#8712ff0d59f7bb6a4d2986ad9637cc9e">Dbo::Session::query()</a>
</dt>
<dd>More robust query parsing (of the 'select' part), including
support for "select distinct".</dd>
<dt>
<a href="classWt_1_1Dbo_1_1QueryModel.html">Dbo::QueryModel</a>
</dt>
<dd>Added editing support (editing the model will modify the queried
dbo's).</dd>
<dt>
<a href="structWt_1_1Dbo_1_1query__result__traits.html">Dbo::query_result_traits<C></a>
</dt>
<dd>Added setValue(), create(), add() and remove() methods for modifying
queried results.</dd>
</dl>
<h3>C) Changes that break existing applications:</h3>
<dl>
<dt><a href="structWt_1_1Dbo_1_1Dbo.html">Dbo::Dbo</a></dt>
<dd>
This class is now a templated with the class name itself, in
order to provide the proper type for the (natural or surrogate) id
field for id(). You will need to replace
<pre>
class User : public Wt::Dbo { ... }
</pre>
with
<pre>
class User : public Wt::Dbo<User> { ... }
</pre>
</dd>
<dt>CSS</dt>
<dd>The toplevel container used by Wt is now given a <tt>position:
relative</tt> style; this was needed to be able to position widgets
(such as popups) using <tt>position: absolute</tt>, but may break
application layouts. You can override this CSS style by adding
<tt>.Wt-domRoot { position: static; }</tt> to your application's
(internal or external) stylesheet.
</dd>
</dl>
<hr />
<h2>Release 3.1.3 (May 20, 2010)</h2>
<p>
This release several new features, but also a few changes that
break backwards compatibility (but are unlikely to affect an average
application).
</p>
<h3>A) New classes:</h3>
<dl>
<dt><a href="classWt_1_1SignalBase.html">SignalBase</a>,
<a href="classWt_1_1EventSignalBase.html">EventSignalBase</a></dt>
<dd>Abstract base classes for signals (these are not actually new,
but they were not yet part of the API).</dd>
<dt><a href="classWt_1_1WHTML5Video.html">WHTML5Video</a></dt>
<dd>Video support using the HTML5 video tag (work-in-progress).</dd>
<dt><a href="classWt_1_1Dbo_1_1Call.html">Dbo::Call</a></dt>
<dd>Class for executing a database call.</dd>
<dt><a href="classWt_1_1Dbo_1_1SqlConnectionPool.html">
Dbo::SqlConnectionPool</a>,
<a href="classWt_1_1Dbo_1_1FixedSqlConnectionPool.html">
Dbo::FixedSqlConnectionPool</a></dt>
<dd>Connection pool interface and implementation.</dd>
<dt><a href="classWt_1_1Dbo_1_1QueryModel.html">Dbo::QueryModel</a></dt>
<dd>An tabular item model for query results.</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
<dl>
<dt><a href="classWt_1_1WAbstractItemDelegate.html">WAbstractItemDelegate</a></dt>
<dd>Added methods for editing: editState(), setEditState(),
setModelData() and closeEditor().</dd>
<dt><a href="classWt_1_1WAbstractItemView.html">WAbstractItemView</a></dt>
<dd><div>New editing API: edit(), closeEditor(), saveEditedValue(),
setEditOptions(), setEditTriggers().</div>
<div>Graceful degradation support using a paging navigation bar, which
may be customized by reimplementing createPageNavigationBar().</div>
</dd>
<dt><a href="classWt_1_1WCalendar.html">WCalendar</a>, <a href="classWt_1_1WDatePicker.html">WDatePicker</a></dt>
<dd>Added setBottom() and setTop() methods to specify a valid range.</dd>
<dt><a href="classWt_1_1WInteractWidget.html">WInteractWidget</a></dt>
<dd>Added a mouseDragged() event for responding to mouse moves while
a mouse button is down.</dd>
<dt><a href="classWt_1_1WItemDelegate.html">WItemDelegate</a></dt>
<dd>Implements editing using a WLineEdit.</dd>
<dt><a href="classWt_1_1WMenu.html">WMenu</a></dt>
<dd>Can now be used without a contents stack.</dd>
<dt><a href="classWt_1_1WSuggestionPopup.html">WSuggestionPopup</a></dt>
<dd>Added API to support dynamic server-side filtering.</dd>
<dt><a href="classWt_1_1WTableView.html">WTableView</a></dt>
<dd>New implementation which supports horizontal and vertical
virtual scrolling, column resizing, drag and drop, etc... like
WTreeView.</dd>
<dt><a href="classWt_1_1Chart_1_1WPieChart.html">Chart::WPieChart</a></dt>
<dd>Supports now also a shadow effect.</dd>
<dt><a href="classWt_1_1Dbo_1_1collection.html">Dbo::collection</a></dt>
<dd>A find() method has been added to refine the query of a many-side relational.</dd>
<dt><a href="classWt_1_1Dbo_1_1ptr.html">Dbo::ptr</a></dt>
<dd>A version() method returns the current version.</dd>
<dt><a href="classWt_1_1Dbo_1_1Query.html">Dbo::Query</a></dt>
<dd>An extra template parameter specifies a binding strategy. The
default binding strategy is DynamicBinding, which allows reuse of
the query object, and provides new API to modify the query:
where(), orderBy(), groupBy(), offset(), limit().</dd>
<dt><a href="classWt_1_1Dbo_1_1Session.html">Dbo::Session</a></dt>
<dd>Added support for use with a connection pool. Added execute()
method to execute an SQL statement.</dd>
<dt>Built-in httpd</dt>
<dd>Support for HTTP Range header and partial content servering.</dd>
</dl>
<h3>C) Changes that break existing applications:</h3>
<dl>
<dt><a href="structWt_1_1Dbo_1_1query__result__traits.html">Dbo::sql_result_traits</a></dt>
<dd>This traits class has been renamed to query_result_traits and
its API has changed considerably. This will only impact when you
have implemented a custom traits specialization. The getColumns()
method has been replaced with a getFields() method, and the
loadValues() method has been renamed to load(). A getValues()
method has been added which provides conversion to boost::any's.
</dd>
<dt><a href="classWt_1_1WTableView.html">WTableView</a></dt>
<dd>This View class was reimplemented to have functionality
comparable to WTreeView. In the process, we had to abandon the
underlying <table> representation because of rendering
issues with Chrome (of all browsers!), although the WTableView
documentation specifically promised that we would keep this.
</dd>
</dl>
<hr />
<h2>Release 3.1.2 (March 26, 2010)</h2>
<p>This release contains mostly bug fixes, and a few new features.</p>
<h3>A) New classes:</h3>
<dl>
<dt><a href="classWt_1_1WShadow.html">WShadow</a></dt>
<dd>Class representing a drop shadow effect (see below).</dd>
<dt><a href="classWt_1_1Dbo_1_1backend_1_1Postgres.html">Dbo/backend/Postgres</a></dt>
<dd>A Postgres backend has landed, contributed by Hilary Cheng.</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
<dl>
<dt><a href="classWt_1_1WBoxLayout.html">WBoxLayout</a>, <a href="classWt_1_1WGridLayout.html">WGridLayout</a></dt>
<dd>Addition of horizontal and vertical splitter support (resize handles to
allow the user to adjust the layout), sponsored by Eurofer. The new API
methods are <a href="classWt_1_1WBoxLayout.html#00bdfb4d442bd8e8ad9c33b72692763f">setResizable()</a>, <a href="classWt_1_1WGridLayout.html#180c33a8f9e21a7b58f12e055fdb469e">setColumnResizable()</a> and <a href="classWt_1_1WGridLayout.html#6028853eb5a66d868323d0e034b69390">setRowResizable()</a></dd>
<dt><a href="classWt_1_1WCalendar.html">WCalendar</a></dt>
<dd>Improved the API to allow custom cell rendering, and custom handling
of selection. We have also made the API for selection consistent with other
widgets (like WTreeView), deprecating the old API.</dd>
<dt><a href="classWt_1_1WDateTime.html">WDateTime</a></dt>
<dd>Added <a href="classWt_1_1WDateTime.html#0d7f04bacc6ea6534bc61ec7305a8262">toPosixTime()</a> and <a href="classWt_1_1WDateTime.html#eb5f093554829688b36640f0977da541">fromPosixTime()</a> methods to interoperate with
<tt>boost::posix_time::ptime</tt>.</dd>
<dt><a href="classWt_1_1WFormWidget.html">WFormWidget</a></dt>
<dd>Added a <a href="classWt_1_1WFormWidget.html#92de7a4d9ca6796607dc9fd26f608436">setEmptyText()</a> method to implement a label inside a line edit or text area.</dd>
<dt><a href="classWt_1_1WPainter.html">WPainter</a></dt>
<dd>Added a <a href="classWt_1_1WPainter.html#9c727b82879ab055f3fcf4c9cdfc1f8d">setShadow()</a> method which defines a drop shadow to be used for subsequent
drawing actions.</dd>
<dt><a href="classWt_1_1WResource.html">WResource</a></dt>
<dd>Added a <a href="classWt_1_1WResource.html#06bb9dbe3ae195c320cfed7b062d448a">setInternalPath()</a> method which allow a resource to be deployed at a deterministic and "pretty" URL.</dd>
<dt><a href="classWt_1_1WString.html">WString</a></dt>
<dd>Added constructors that take a std::locale for interpreting a narrow
string in a given locale.</dd>
<dt><a href="classWt_1_1WWidget.html">WWidget</a></dt>
<dd>Added <a href="classWt_1_1WWidget.html#4f83592912a7f8fa4fd35dadde78ee74">setLayoutSizeAware()</a> and <a href="classWt_1_1WWidget.html#f432588db3d599f89b54121f2ede8d63">layoutSizeChanged()</a> methods which allow a widget to react to layout size changes.</dd>
<dt><a href="classWt_1_1Http_1_1Request.html">Http::Request</a></dt>
<dd>Added access to the request <a href="classWt_1_1Http_1_1Request.html#e76664f93462d9311ee671c93607e5ca">method()</a>.</dd>
<dt><a href="classWt_1_1Http_1_1Response.html">Http::Response</a></dt>
<dd>Added a <a href="classWt_1_1Http_1_1Response.html#7c14ba3ab34ff14461df3a4369118443">setStatus()</a> method to modify the response status.</dd>
<dt><a href="classWt_1_1Dbo_1_1Session.html">Dbo::Session</a></dt>
<dd>Added support for schema qualified tables, in
<a href="classWt_1_1Dbo_1_1Session.html#5886d450c052ae0ee15ab3c91e439229">Session::mapClass()</a> and the joinTable specified in <a href="group__dbo.html#g1a086b583fb150dbd4c5b4ba92bc177f">hasMany()</a>.<br />
Added API for dropping the schema: <a href="classWt_1_1Dbo_1_1Session.html#4c1fedb21e4e1cc44b182a34e8ebb4efdropTables()">dropTables()</a>. <br />
Added support for arbitrary queries in <a href="classWt_1_1Dbo_1_1Session.html#d39e953ef521eaa58c4c7e6ca1a6c19e">Session::query()</a>, including
queries that do not return result or do not select from tables.</dd>
<dt><a href="group__dbo.html#g8a2b653ff57f1459dfa2e556badd71d6">Dbo::field()</a></dt>
<dd>Allow size suggestion for std::string and WString mappings</dd>
<dt><a href="classWt_1_1Dbo_1_1SqlConnection.html">Dbo::SqlConnection, Dbo::SqlStatement</a></dt>
<dd>Added support for floating point types, binary data (using std::vector<unsigned char>) and date and date/time types.<br/>
Added methods for return dialect-specific information.<br/>
Added properties API.<br/>
</dd>
<dt><a href="structWt_1_1Dbo_1_1sql__value__traits.html">Dbo::sql_value_traits</a></dt>
<dd>Added support for backend-specific type mapping.</dd>
<dt>(internal) DomElement</dt>
<dd>Performance improvements in serializing the widgets to HTML
and/or JavaScript</dd>
<dt>Built-in httpd</dt>
<dd>Added a configuration option <tt>--max-request-size</tt> to
limit the size of a POST instead of the built-in default of 40
MB<br/> Added a configuration option
<tt>--max-memory-request-size</tt> to limit the size of a POST that
is handed in-memory. Bigger POSTs are handled using a spool file.
</dd>
</dl>
<hr />
<h2>Release 3.1.1 (February 17, 2010)</h2>
<p>The minimum boost version is now 1.36.</p>
<p>This release handles mostly bug fixes, with as most visible change
an update of the <i>polished</i> theme, which is now considered
complete.</p>
<h3>A) Security fixes:</h3>
Because of the following fixes for security problems, we recommend anyone
to upgrade live deployments of his application to the latest version.
<dl>
<dt>Possible XSS vulnerability</dt>
<dd>Fixed a possible XSS attack where a user follows a link to a Wt web
application, taking advantage of unchecked insertions of the URL when
redirecting to the canonical page.</dd>
<dt>Possible UTF-8 vulnerability</dt>
<dd>Form values and JSignal arguments received from the browser are
now checked for sane UTF-8 encoding.</dd>
</dl>
<h3>B) New classes:</h3>
<dl>
<dt><a href="classWt_1_1Dbo_1_1Dbo.html">Dbo/Dbo</a></dt>
<dd>An optional base class for a database object, providing access to its
id() and session().</dd>
</dl>
<h3>C) Main new features in existing classes:</h3>
<dl>
<dt><a href="classWt_1_1WCanvasPaintDevice.html">WCanvasPaintDevice</a></dt>
<dd>Now implements native text rendering on Firefox and latest
Chrome and Safari browsers</dd>
<dt><a href="classWt_1_1WInPlaceEdit.html">WInPlaceEdit</a></dt>
<dd>Added a setEmptyText() method which sets the text to be
displayed when value is empty.</dd>
<dt><a href="classWt_1_1WPopupMenu.html">WPopopMenu</a></dt>
<dd>Added an exec(WWidget *location, Orientation orientation) method which
popups the menu besides another widget.</dd>
<dt><a href="classWt_1_1WSuggestionPopup.html">WSuggestionPopup</a></dt>
<dd>This class is now also style by the CSS theme.</dd>
<dt><a href="classWt_1_1WTemplate.html">WTemplate</a></dt>
<dd>Avoids now rerendering of already bound widgets when the
template is rerendered.</dd>
<dt><a href="classWt_1_1WTree.html">WTree</a>,
<a href="classWt_1_1WTreeNode.html">WTreeNode</a>,
<a href="classWt_1_1WTreeTable.html">WTreeTable</a>,
<a href="classWt_1_1WTreeTableNode.html">WTreeTableNode</a>
</dt>
<dd>These widgets are now theme-aware, and tree decoration styling
is provided by the theme. The setImagePack() APIs are now
no-ops</dd>
<dt><a href="classWt_1_1WWidget.html">WWidget</a></dt>
<dd>Added positionAt() method which positions a widget (absolutely) besides
another widget.</dd>
<dt><a href="classWt_1_1Chart_1_1WAxis.html">Chart/WAxis></a></dt>
<dd>Added a setLabelFont() method.</dd>
<dt><a href="classWt_1_1Http_1_1Request.html">Http/Request</a></dt>
<dd>Added serverName(), serverPort(), path(), pathInfo(),
queryString(), urlScheme(), in(), contentType(), contentLength(),
userAgent() and clientAddress() methods which expose information
form the HTTP request to WResources.</dd>
</dl>
<h3>D) Build changes:</h3>
<dl>
<dt>XML_FEATURES</dt>
<dd>This CMake option has been removed, and Mini-XML has been
replaced by a modified RapidXML xml parser (mostly because of the
hard-to-interpret Mini-XML license), but there are also nice
performance improvements.</dd>
</dl>
<hr />
<h2>Release 3.1.0 (December 29, 2009)</h2>
<p>This release contains several new features and classes, after a long
period of stabilization that happened before the 3.0.0 release.</p>
<h3>A) New classes:</h3>
<dl>
<dt><a href="classWt_1_1WAggregateProxyModel.html">WAggregateProxyModel</a></dt>
<dd>A model that provides support for drilling down through columns, supported
by WTreeView.</dd>
<dt><a href="classWt_1_1WCombinedLocalizedStrings.html">WCombinedLocalizedStrings</a></dt>
<dd>Combines different localized strings implementations.</dd>
<dt><a href="classWt_1_1WDateTime.html">WDateTime</a></dt>
<dd>Combines a calendar date (WDate) and a clock time (WTime).</dd>
<dt><a href="classWt_1_1WTemplate.html">WTemplate</a></dt>
<dd>Use an XHTML fragment as a template, with variables that are place
holders for strings or other widgets. See the blog example of how this
class can be used to simplify HTML/CSS based layout of widgets and
contents.</dd>
<dt><a href="classWt_1_1WTime.html">WTime</a></dt>
<dd>Represents a clock time (0-24 hours).</dd>
<dt><a href="group__dbo.html">Wt::Dbo</a></dt>
<dd>An Object Relational Mapping library. See the <a href="../../tutorial/dbo.html">tutorial here</a>.</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
Most inline CSS styles have been pushed out to an external style
sheet, which may be themed. The "default" theme provides the old look,
while a new "polished" theme provides a less boring (?) look for
several widgets (work in progress). The theme can be set using <a
href="classWt_1_1WApplication.html">WApplication::setCssTheme()</a>.
As a result, you will need to deploy Wt's <tt>"resources/"</tt>
folder, which contains the themes in <tt>"resources/themes/"</tt>, for
all but the most trivial applications.
<dl>
<dt><a href="classWt_1_1Signal.html">Signal</a></dt>
<dd>Added a template connect() method which may be given any function
object, providing also support for the (future) c++1x lambda functions.</dd>
<dt><a href="classWt_1_1WCanvasDevice.html">WCanvasDevice</a></dt>
<dd>Several optimizations to output more concise JavaScript.</dd>
<dt><a href="classWt_1_1WPaintedWidget.html">WPaintedWidget</a></dt>
<dd>When width and/or height is not set using resize(), the widget
will now properly react to layout management when put into a layout
manager, triggering a server-side rerendering when needed.</dd>
<dt><a href="classWt_1_1WSlider.html">WSlider</a></dt>
<dd>A sliderMoved() signal was added which is fired whenever the slider is
moved (but not yet released).</dd>
<dt><a href="classWt_1_1WWidget.html">WWidget</a></dt>
<dd>Added a find() method which searches the widget hierachy for a widget
with a particular objectName().</dd>
<dt><a href="classWt_1_1WServer.html">WServer</a></dt>
<dd>Added an addResource() method to bind static resources to particular
URLs (i.e. resources that are not bound to a specific session).</dd>
<dt><a href="classWt_1_1Ext_1_1Container.html">Ext::Container</a></dt>
<dd>Will now properly react to layout management from a layout that
is set for a WContainerWidget.</dd>
<dt><a href="classWt_1_1Ext_1_1FormField.html">Ext::FormField</a></dt>
<dd>Added changed(), blurred() and focussed() signals.</dd>
<dt><a href="classWt_1_1Chart_1_1WAxis.html">Chart::WAxis</a></dt>
<dd>Added setAutoLimits() and autoLimits() methods to configure which limits
are to be determined based on the data, and which are explicitly set.</dd>
<dt><a href="classWt_1_1Chart_1_1WDataSeries.html">Chart::WDataSeries</a></dt>
<dd>Added the setHidden() and hidden() methods to enable or disable
a data series. Added setBarWidth() and barWidth() methods to set the
width of a bar (useful mostly for scatter plots). Added
setMarkerSize() and markerSize() methos.</dd>
<dt><a
href="classWt_1_1Chart_1_1WCartesianChart.html">Chart::WCartesianChart</a></dt>
<dd>Use MarkerPenColorRole and MarkerBrushColorRole to override
colors for makers on a per data point basis. Added mapFromDevice()
and mapToDevice() methods for mapping device coordinates to chart
coordinates and vice-versa</dd>
</dl>
<h3>C) API Changes:</h3>
<dl>
<dt><a href="classWt_1_1WSlider.html">WSlider</a></dt>
<dd>Not really an API change, but the vertical slider is now showing
the maximum value at its top side, not its bottom side.</dd>
<dt><a href="classWt_1_1Chart_1_1WAxis.html">Chart::WAxis</a></dt>
<dd>The minimum() and maximum() methods will now return the calculated
minimum and maximum value when they are to be automatically calculated based
on the data, configured using setAutoLimits()</dd>
</dl>
<h3>D) Build changes:</h3>
<dl>
<dt>XML_FEATURES</dt>
<dd>A new configuration option, XML_FEATURES, was added which allows the library to be built without MiniXML (and disabling fatures that require Mini-XML support). This configuration option is likely to be removed again in future versions.</dd>
<dt>Documentation</dt>
<dd>A <tt>doc</tt> directive was added, which uses doxygen and asciidoc tools
to generate the reference documentation and tutorial.</dd>
<dt>Tests</dt>
<dd>Automated tests were added for non-interactive functionality,
and are built by default.</dd>
</dl>
<hr />
<h2>Release 3.0.0 (November 3, 2009)</h2>
<p>
This release contains mostly bug fixes, build improvements and
documentation improvements compared to the latest pre-release
(2.99.5).
</p>
<p>
Most build improvements are related to finding the boost
libraries. Previously, Wt used a custom script, since CMake versions
< 2.6 did not provide a good enough script for finding
boost. Starting with this release, when using CMake 2.6 or later, Wt
will use the script that comes with CMake. You can still fall back to
the script that comes with Wt, which is still used for older versions
of CMake, by defining one of the BOOST_COMPILER or BOOST_VERSION
variables.
</p>
<h3>A) New classes:</h3>
<i>No new classes</i>
<h3>B) Main new features in existing classes:</h3>
<dl>
<dt><a href="classWt_1_1WDialog.html">WDialog</a></dt>
<dd>It is now possible to have multiple modal dialogs, and nested
recursive event loops.</dd>
<dt><a href="classWt_1_1WWidget.html#e29fe35b633ec166f922419cd3ca9d96">
WWidget</a></dt>
<dd>The <samp>setDisabled()</samp> method moved up
from <samp>WFormWidget</samp> to <samp>WWidget</samp>.</dd>
<dt><a href="classWt_1_1JSlot.html#3d65b00a8015e556580527b52750ef87">
JSlot</a></dt>
<dd>The <samp>exec()</samp> method now passes object and event to the
JavaScript event handler.</dd>
</dl>
<h3>C) API Changes:</h3>
<dl>
<dt><a href="classWt_1_1WResource.html">WResource</a></dt>
<dd>The handling of changes to the resource has been sanitized. A
new method, <samp>setChanged()</samp> was added which must be called
to notify users of the resource that the resource was changed. In
addition to the existing <samp>generateUrl()</samp> which generates
a new URL, a method was added which merely returns the existing
URL: <samp>url()</samp>. With these improvements, a resource can
effictively be shared by many view widgets and updated with the
minimum of bandwidth usage.</dd>
</dl>
<hr />
<h2>Release 2.99.5 (September 1, 2009)</h2>
<p>
This release contains mostly bug fixes. The previous release (2.99.4)
contains some critical bugs that cause mayhem on IE, and a regression
with server push.
</p>
<hr />
<h2>Release 2.99.4 (August 27, 2009)</h2>
<p style="text-align: center">
<b>!! This release contains bugs that render it unusable on IE !!</b>
</p>
<p>
This release contains mostly bug fixes and back-end improvements. The
most exciting new feature is the addition of a new bootstrap method,
which implements progressive enhancements (starting with a plain HTML
page, and then upgrading it to an AJAX page if the browser has
support), see
also <a href="/wt/doc/reference/html/overview.html#progressive_bootstrap">the
documentation</a>.
</p>
<h3>A) New classes:</h3>
<dl>
<dt><a href="classWt_1_1WTableView.html">WTableView</a></dt>
<dd>This is a simple MVC View class that renders tabular data
in the most straight forward way using an HTML table element
</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
<dl>
<dt><a href="classWt_1_1Ext_1_1ToolBar.html#931b9b3e5d4cbbdee5394a841752c849">Ext::ToolBar</a></dt>
<dd>Added insert() methods.</dd>
<dt><a href="classWt_1_1WApplication.html#78016406c4746c56b2c2ffce7c5e181f">WApplication</a></dt>
<dd>Added an enableAjax() method which notifies the application that
a session is being enhanced with AJAX capabilities when using the
progressive bootstrap method.</dd>
<dt><a href="classWt_1_1WWidget.html#919a4eaf68ff52f06f6a726d55dfb768">WWidget</a></dt>
<dd>Added an enableAjax() method which enhanced the widget with AJAX
capabilities when using the progressive bootstrap method.</dd>
<dt><a href="classWt_1_WCssDecorationStyle.html">WCssDecorationStyle</a></dt>
<dd>Add support for custom cursors.</dd>
<dt><a href="classWt_1_WWServer.html">WServer</a></dt>
<dd>For FastCGI deployments, the proxy process which directs FastCGI
requests to the correct session process is now also
multi-threaded.</dd>
</dl>
<h3>C) API Changes:</h3>
<dl>
<dt>The <a href="classWt_1_1WApplication.html#4a6f167bea94aefa8ba24f914c2fbee5">WApplication::notify()</a> behavior changed.</dt>
<dd>Previously during a request, this method was called multiple
times during event propagation and rendering of the
application. Now, the method is called exactly once for each
request. In this way, it becomes a useful entry point to also manage
resource usage during (and inbetween) requests.</dd>
</dl>
<hr />
<h2>Release 2.99.3 (July 24, 2009)</h2>
<p>
This release contains mostly bug fixes and small feature
improvements. The most notable change that might affect existing
applications is a simplified internal path API behavior.
</p>
<h3>A) New classes:</h3>
<dl>
<dt><a href="classWt_1_1WAbstractItemDelegate.html">WAbstractItemDelegate</a>
and <a href="classWt_1_1WItemDelegate.html">WItemDelegate</a></dt>
<dd><samp>WAbstractItemDelegate</samp> is a helper class used
by <samp>WTreeView</samp> (and in the future perhaps other view
classes) to render contents. The standard
implementation, <samp>WItemDelegate</samp> maintains the default
implementation that was previously integrated
in <samp>WTreeView</samp>. The delegate will be responsible for
editing features in <samp>WTreeView</samp> in the future, and in
fact, you can already implement a custom item delegate that does
editing if you cannot wait for it!
</dd>
<dt><a href="classWt_1_1Test_1_1WTestEnvironment.html">Test/WTestEnvironment</a></dt>
<dd><samp>WTestEnvironment</samp> is an environment class which is useful for
(unit) test-cases: it allows the instantiation of a
<samp>WApplication</samp> so that you may include widgets in unit tests.
</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
<h3>C) API Changes:</h3>
<dl>
<dt>change of WApplication::internalPathChanged() semantics.</dt>
<dd>The old behavior was that a single internal path change caused
by the user (e.g. by moving forward/backword through his browser
history) would cause repetitive invocations of internalPathChanged()
with different arguments. The underlying idea was that this would
make it easier to have the handling of internal path changes
distributed over different objects. It caused however more problems
than it solved. The new behavior is now that it is invoked exactly
one time, and the argument is simply the new internal path.</dd>
</dl>
<hr />
<h2>Release 2.99.2 (May 29, 2009)</h2>
<p>
This release contains mostly build improvements, bug fixes, and API cleanups.
</p>
<h3>A) New classes:</h3>
<dl>
<dt><a href="classWt_1_1Http_1_1Client.html">Http/Client</a></dt>
<dd><samp>Client</samp> is a utility class to bootstrap a new Wt
application.</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
<dl>
<dt><a href="classWt_1_1Ext_1_1FormField.html">Ext::FormField</a></dt>
<dd>Add setFocus() method.</dd>
<dt><a href="classWt_1_1Ext_1_1ToolBar.html">Ext::ToolBar</a></dt>
<dd>Added an addStretch() method (contributed by David Galicia).</dd>
<dt><a href="classWt_1_1Http_1_1Response.html">Http::Response</a></dt>
<dd>Added a continuation() method.</dd>
<dt><a href="classWt_1_1WCheckBox.html">WCheckBox</a></dt>
<dd>Add support for tri-state checkboxes. These are also supported
by item models and WTreeView.</dd>
<dt><a href="classWt_1_1WWDialog.html">WDialog</a></dt>
<dd>Support for non-modal dialogs and interactive moving.</dd>
<dt><a href="classWt_1_1WFormWidget.html">WFormWidget</a></dt>
<dd>New methods setReadOnly() and isReadOnly().</dd>
<dt><a href="classWt_1_1WGridLayout.html">WGridLayout</a></dt>
<dd>Support a row stretch value of -1, which is like 0 but will still
manage the height of cells (allowing their contents to fill the entire
cell).</dd>
<dt><a href="classWt_1_1WPaintDevice.html">WPaintDevice</a></dt>
<dd>Support update rendering (not erasing the current canvas) using
paint flags.</dd>
</dl>
<h3>C) API Changes:</h3>
<dl>
<dt>WFileUpload::isUploaded() was deprecated</dt>
<dd>The name was not covering its actual behavior: instead of
checking whether a file has been uploaded, it returns whether true
when a call to upload() is not needed. You should replace any call
to isUploaded() with the new method
<a href="classWt_1_1WFileUpload.htm#66376fb4668a037760a91abad9f83f8al">!canUpload()</a> (<b>note the inversion!</b>.</dd>
</dl>
<hr />
<h2>Release 2.99.1 (Mar 20, 2009)</h2>
<p>
This release contains only build improvements, bug fixes, and API cleanups.
</p>
<hr />
<h2>Release 2.99.0 (Mar 4, 2009)</h2>
<p>
This release is a preview for Wt 3.0.0. Many things have changed both
in the internals and the API. This is the first release that provides
several API changes which are not backward compatible (some of which
were post-poned until now).
Please read the following notes carefully, especially sections C) and
D), to understand what changes to expect and how to adapt existing
applications.
</p>
<p>
Support for the C++ boost library < 1.35 has been dropped: Wt now
requires at least boost >= 1.35.0.
</p>
<h3>A) New classes:</h3>
<dl>
<dt><a href="classWt_1_1WFlags.html">WFlags</a></dt>
<dd><samp>WFlags</samp> is a utility class that provides a type-safe ORing of
enum flags. It is used everywhere in the Wt API where previously an
<samp>int</samp> was used to allow enums to be ORed together.</dd>
<dt><a href="classWt_1_1WGoogleMap.html">WGoogleMap</a></dt>
<dd>This is a widget, contributed by Richard Ulrich, that displays a
Google map.</dd>
<dt><a href="classWt_1_1Http_1_1Request.html">Http::Request</a>, <a href="classWt_1_1Http_1_1Response.html">Http::Response</a>, <a href="classWt_1_1Http_1_1ResponseContinuation.html">Http::ResponseContinuation</a> and <a href="classWt_1_1Http_1_1UploadedFile.html">Http::UploadedFile</a></dt>
<dd>These are utility classes which model an HTTP request and
response and that are used in the new <samp>WResource</samp> API.</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
<dl>
<dt><a href="classWt_1_1WApplication.html#d9631ca64e68d30d40cb49c90e55223d">WApplication::enableUpdates()</a></dt>
<dd>Server-initiated updates (aka "server push") has been
reimplemented and now works reliably in all situations, including in
the presence of intermediate proxies. The dependency on the 3rd
party JS orbited library has been removed and replaced with a simple
XHR-based solution.</dd>
<dt><a href="classWt_1_1WButtonGroup.html">WButtonGroup</a></dt>
<dd>Various methods were added: id's may be associated with a specific
radio buttons, which may be used to identify a particular button.</dd>
<dt><a href="classWt_1_1WDatePicker.html">WDatePicker</a></dt>
<dd>Is now easier to use because of a sensible default constructor
that also creates the line edit using a <samp>WDateValidator</samp>,
and creates the icon which is associated with the popup.</dd>
<dt><a href="classWt_1_1WFileResource.html">WFileResource</a></dt>
<dd>Uses the continuation support in the new <samp>WResource</samp> API
to transmit the file in chunks.</dd>
<dt><a href="classWt_1_1WLength.html">WLength</a></dt>
<dd>WLength::Auto was added, is a synonym for WLength()</dd>
<dt><a href="classWt_1_1WSuggestionPopup.html">WSuggestionPopup</a></dt>
<dd>Is now also an MVC View widget, reading its data from a
<samp>WAbstractItemModel</samp></dd>
<dt><a href="classWt_1_1WTable.html">WTable</a></dt> <dd>New method
setHeaderCount() to specify the number of first rows or columns that
should be rendered as an HTML table header
(<samp><th></samp>).</dd>
<dt><a href="classWt_1_1WWidget.html">WWidget</a></dt>
<dd><p>New virtual method <samp>rerender()</samp> which allows a
widget to prepare itself before rendering (and defer internal
changes until that time). A widget may ask to be rerendered using
<samp>askRerender()</samp></p> <p><samp>Widget</samp> no longer
inherits from <samp>WResource</samp>, but instead inherits directly from
<samp>WObject</samp>. It was simply a bad idea, and not useful for
anything.</p></dd>
</dl>
<h3>C) Changes that break existing applications:</h3>
<dl>
<dt>1) Signals are no longer public members</dt>
<dd><p>Instead, they are now accessor member functions:
e.g. <samp>WInteractWidget::clicked</samp> has been renamed to
<samp>WInteractWidget::clicked()</samp>. This has as major benefit
that signals can be created on-demand, which leads to drastically
lower memory usage and signifcant speedups especially on embedded
systems.</p> <p>The change requires that everywhere in your code
where you access a signal, you will need to change to add
parentheses. For consistency, you may also want to
use the same convention for your own widget classes that define
signals.</p></dd>
<dt>2) <a href="classWt_1_1WResource.html">WResource</a></dt>
<dd><p>The API has been redesigned and greatly simplified. If you are
implementing your own resources, then you will need to redesign your
implementation. The new API is simpler (requires only one virtual
method to be implemented) and more powerful, providing support for
<i>continuations</i> to serve large resources without blocking a
thread or requiring large memory usage.</p>
<p>In addition, resources have better thread-safety: they are now by
default reentrant (requests for a single resource may be handled
concurrently) and they are protected from concurrently being
destroyed by the main event loop.</p></dd>
<dt>3) <a href="classWt_1_1WValidator.html">WValidator</a></dt>
<dd><p>The signature for the virtual <samp>validate()</samp> method was
changed: parameter <samp>pos</samp> which was ignored anyway has
been removed.</p></dd>
<dt>4) <a href="classWt_1_1WEnvironment.html">WEnvironment</a></dt>
<dd><p>The methods <samp>getArgument()</samp> and
<samp>arguments()</samp> were renamed to respectively
<samp>getParameter()</samp> and <samp>getParameterMap()</samp>. The
signature for <samp>getParameter()</samp> is also different as it
returns a pointer to a string, which is 0 when the parameter is not
defined, instead of the olde behaviour of throwing an
exception. There is a new method that allows to read all values for
a parameter, <samp>getParameterValues()</samp></p></dd>
<dt>5) <a href="classWt_1_1ModelIndex.html">WModelIndex</a></dt>
<dd><p>The 20-byte SHA1 hash based internal pointer has been removed
again as the object increase and overhead could not be justified.</p></dd>
</dl>
<h3>D) Deprecated API that was removed:</h3>
These are API calls that were deprecated in earlier releases, and have now
been completely removed from the library:
<dl>
<dt><samp>WApplication::applicationName()</samp></dt>
<dd>Use <a
href="classWt_1_1WApplication.html#ab6320ecdd0e8e4026e9ef1aca710ca5">
WApplication::internalPath()</a> instead.</dd>
<dt><samp>WApplication::setState()</samp></dt>
<dd>Use <a
href="classWt_1_1WApplication.html#2c1a10aadc0d7ed877b5715b42ca4911">WApplication::setInternalPath()</a>
instead.</dd>
<dt><samp>WApplication::state()</samp></dt>
<dd>Use <a
href="classWt_1_1WApplication.html#ab6320ecdd0e8e4026e9ef1aca710ca5">
WApplication::internalPath()</a> instead.</dd>
<dt><samp>WApplication::stateChanged</samp></dt>
<dd>Use <a
href="classWt_1_1WApplication.html#3e68c4b6bb387f27a614e7962e11967b">WApplication::internalPathChanged()</a>
instead.</dd>
<dt><samp>WRegExpValidator::WRegExpValidator(const boost::regex&)
</samp></dt>
<dd>Use the <a
href="classWt_1_1WRegExpValidator.html#7536b67e2bedd2dfdb5b89c9dd56602b">WRegExpValidator(const
WString&)</a> constructor instead.</dd>
<dt><samp>WPainterPath::drawArc(..., width, height, ...)</samp></dt>
<dd>An elliptical arc segment could not be support on all devices.</dd>
<dt><samp>WTable::numRows()</samp></dt>
<dd>Use <a href="classWt_1_1WTable.html#79d5dfe40ee5e67c5007ee370e8cd2f3">WTable::rowCount()</a>.</dd>
<dt><samp>WTable::numColumns()</samp></dt>
<dd>Use <a
href="classWt_1_1WTable.html#4d062330d1c9b3f202985b92dcb59d4f">WTable::columnCount()</a>
instead.</dd>
<dt><samp>WText::setFormatting()</samp> and
<samp>WText::formatting()</samp></dt>
<dd>Use <a href="classWt_1_1WText.html#f22c64c4c5fed3d2aef0915a7e5c5866">WText::setTextFormat()</a> and
<a href="classWt_1_1WText.html#c0976c36c5181a534f161ca3724d4296">WText::textFormat()</a> instead.</dd>
</dl>
<hr />
<h2>Release 2.2.3 (Jan 26, 2009)</h2>
<p>This release is a maintenance release, with mostly bug fixes and
feature improvements.</p>
<h3>A) Main new features in existing classes:</h3>
<dl>
<dt><a href="classWt_1_1WAbstractItemModel.html">WAbstractItemModel</a>:</dt>
<dd><samp>const char *</samp> data in <samp>boost::any</samp> is now
also supported.</dd>
<dt><a href="classWt_1_1WAbstractProxyModel.html">WAbstractProxyModel</a>:
</dt><dd>Implemented <samp>toRawIndex()</samp>
and <samp>fromRawIndex()</samp> so that indexes can be recovered
when the model's layout is changed, if the underlying model
provides implementations for <samp>toRawIndex()</samp>
and <samp>fromRawIndex()</samp>.</dd>
<dt><a href="classWt_1_1WComboBox.html">WComboBox</a>:</dt>
<dd>Also supports <samp>StyleClassRole</samp> data role for items</dd>
<dt><a href="classWt_1_1WDialog.html">WDialog</a>:</dt>
<dd>New method <samp>setTitleBarEnabled()</samp> to disable the default
title bar.</dd>
<dt><a href="classWt_1_1WMenu.html">WMenu</a>:</dt>
<dd>New method <samp>removeItem()</samp>, only works when rendered as a
list.</dd>
<dt><a href="classWt_1_1WTabWidget.html">WTabWidget</a>:</dt>
<dd>New method <samp>removeTab()</samp>.</dd>
<dt><a href="classWt_1_1WTreeView.html">WTreeView</a>:</dt>
<dd><ul>
<li>New method <samp>setColumn1Fixed()</samp> to fix the first
column while scrolling horizontally through the other columns.</li>
<li>New method <samp>setColumnFormat()</samp> to control formatting of
data.</li>
<li>New method <samp>setColumnBorder()</samp> to set the
internal column border color.</li>
<li>New method <samp>setColumnResizeEnabled()</samp> to disable resize
handles.</li>
<li>The view now also reacts correctly to insertion and
removal of model columns.</li>
</ul>
</dd>
</dl>
<h3>B) New examples</h3>
<dl>
<dt><a href="http://www.webtoolkit.eu/wt/examples/gitmodel/gitview.wt">
gitmodel:</a></dt>
<dd>An example that demonstrates how to implement a custom abstract
item model.</dd>
<dt><a href="http://www.webtoolkit.eu/wt/examples/treeview-dragdrop/treeview-dragdrop.wt">treeview-dragdrop</a>:</dt>
<dd>An example that demonstrates drag and drop support in WTreeView.</dd>
</dl>
<h3>C) Changes that break backward compatibility</h3>
<dl>
<dt><a href="classWt_1_1WApplication.html">WApplication</a>:</dt>
<dd><samp>useStyleSheet()</samp> only supports a subset of IE condition
strings, since the string is now parsed by Wt rather than by IE (when
dynamically loading stylesheets, the comment-syntax does not work
reliably).</dd>
</dl>
<hr />
<h2>Release 2.2.2 (Dec 1, 2008)</h2>
<p><i>As of now, we will also be listing noteworthy new API features,
even if they are no concern for backwards compatibility.</i></p>
<h3>A) New classes:</h3>
<dl>
<dt><a href="classWt_1_1WPopupMenu.html">WPopupMenu</a>,
<a href="classWt_1_1WPopupMenuItem.html">WPopupMenuItem</a>:</dt>
<dd>A popup menu, which you would typically use to present a
context menu.</dd>
<dt><a href="classWt_1_1WAbstractProxyModel.html">WAbstractProxyModel</a>,
<a href="classWt_1_1WSortFilterProxyModel.html">WSortFilterProxyModel</a>:</dt>
<dd>Proxy models, which present data from a source model in a
different way.</dd>
<dt><a href="classWt_1_1WLoadingIndicator.html">WLoadingIndicator</a>, <a href="classWt_1_1WDefaultLoadingIndicator.html">WDefaultLoadingIndicator</a>,
<a href="classWt_1_1WOverlayLoadingIndicator.html">WOverlayLoadingIndicator</a>:</dt>
<dd>Customizable loading indicators.</dd>
</dl>
<h3>B) Main new features in existing classes:</h3>
<dl>
<dt><a href="classWt_1_1WTreeView.html">WTreeView</a>, <a href="classWt_1_1WAbstractItemModel.html">WAbstractItemModel</a>:</dt>
<dd>The WAbstractItemModel interface was extended to allow handling
of drag & drop events, and WTreeView now is able to start
dragging and handle dropping of item selections and other data.</dd>
<dt><a href="classWt_1_1JSignal.html">JSignal</a>:</dt>
<dd>You can now pass the original (keyboard/mouse) JavaScript event
as a parameter to custom signals.</dd>
<dt><a href="classWt_1_1WTreeView.html">WTreeView</a>:</dt>
<dd>access mouse event in itemClicked, doubleClicked and
mouseWentDown signals.</dd>
<dt><a href="classWt_1_1WServer.html">WServer</a>:</dt>
<dd>Support for widget-set mode, allowing a Wt application to be
embedded in an existing web page/application.</dd>
</dl>
<h3>C) Changes that break backward compatibility</h3>
<p>This release does not contain changes that break existing
applications.</p>
<hr />
<h2>Release 2.2.1 (Nov 3, 2008)</h2>
<p>This release is as usually a mix of bug fixes, improvements and new
features.</p>
<p>We have made a significant change to the MVC system, which will
break existing program code in case you have implemented your own
models (i.e. deriving from <samp>WAbstractItemModel</samp>) or views
widgets (i.e. components that listen to model changes).</p>
<p>
The <samp>WAbstractItemModel</samp> interface was changed to support
hierarchical models. This means that most methods will now take an
extra parameter that specifies the parent <samp>WModelIndex</samp>,
and also all signals have now this extra parameter. Because the
parameter has a default value of WModelIndex() which corresponds to
the top level parent, the API is largely backwards compatible when
merely using the model. It is only those classes that reimplement the
interface, or listen to signal events, that are affected.
</p>
<p>
The immediate benefit of the new <samp>WAbstracItemModel</samp>
interface is that it allows us to implement View widgets like the new
<samp>WTreeView</samp> widget.
</p>
<hr />
<h2>Release 2.2.0 (Sept 12, 2008)</h2>
<p>This release has a rather substantial rewrite (and simplification)
of Wt's bootstrapping process. In the past, Wt used a frameset trick
to be able to load the AJAX-based skeleton when JavaScript was
available. Isntead, now, the entire AJAX-based stuff is loaded
directly into the bootstrap page. A benefit of the new approach is
that we avoid iframe tricks, which have been deprecated from strict
HTML and XHTML. But, it was in fact motivated in the first place to
support all major browsers for a new internal path API. This new API
allows to fully support URL changes and bookmarks in a unified way
(i.e. it works equally when the browser supports AJAX, no JavaScript,
or is a bot such as google bot).</p>
<p>As a consequence, this release contains the following changes that
may break your application:</p>
<ul>
<li><samp>WMenu::enableBrowserHistory()</samp> and <samp>WMenu::browserHistoryId()</samp> have been removed, use the new methods <samp>WMenu::setInternalPathEnabled()</samp> and <samp>WMenu::setInternalBasePath()</samp>
</li>
<li><samp>WMenuItem</samp> has been reorganized, and if you have
specialized WMenuItem you will need to adapt your reimplementation
to the new virtual interface. In the new interface, you need to
reimplement <samp>WMenuItem::createItemWidget()</samp> and
<samp>WMenuItem::updateItemWidget()</samp> allowing you to react to
item changes (internal path or text). The default implementation now
always uses a WAnchor.</li>
<li><samp>WApplication::setState()</samp>, <samp>WApplication::state()</samp> and <samp>WApplication::stateChanged</samp> have been deprecated. It is stronly advised that you use the new internal path API instead. This does require you to treat different parts of the state as a file hierarchy. See the <samp>WApplication::setInternalPath() documentation</samp>.
</li>
</ul>
<p>
The following methods have been deprecated (but are still supported):
</p>
<ul>
<li><samp>WTable::numRows()</samp> has been renamed
to <samp>WTable::rowCount()</samp>.</li>
<li><samp>WTable::numColumns()</samp> has been renamed
to <samp>WTable::columnCount()</samp>.</li>
</ul>
<hr />
<h2>Release 2.1.5 (July 25, 2008)</h2>
<p>Wt now installs its include files in a Wt/ subdirectory. You may
want to change your build files to pick up this new include directory,
or, change your code to scope the include files to look like
#include<Wt/WLineEdit> instead of #include<WLineEdit></p>
<p>This release contains the following changes that may break your
application:</p>
<ul>
<li><samp>WText</samp> will validate XHTML text when it is set to the
widget. The old behaviour was to validate only before
rendering. The change was needed to be able to react to XML parse
errors. As a consequence if you are creating a WText with text that
is not valid XML, followed by a
call <samp>setFormatting(WText::PlainFormatting)</samp>, you should
change this now to use the new <samp>WText</samp> constructor which
takes the TextFormat as a new argument: <samp>new WText(text,
Wt::PlainText, parentWidget)</samp>
</li>
<li><samp>WContainerWidget::setLayout(WLayout *layout, bool fitWidth, bool
fitHeight)</samp> has been replaced with the more generic
<samp>WContainerWidget::setLayout(WLayout *layout, int
alignment)</samp>.
</li>
</ul>
<p>
The following methods and enumerations have been deprecated (but are
still supported):
</p>
<ul>
<li><samp>enum WText::Formatting</samp> has been renamed
to <samp>Wt::TextFormat</samp>. The old values map as follows on new
values:
<ul>
<li><samp>WText::XHTMLFormatting</samp> becomes <samp>Wt::XHTMLText</samp>;</li>
<li><samp>WText::XHTMLUnsafeFormatting</samp> becomes <samp>Wt::XHTMLUnsafeText</samp></li>
<li><samp>WText::PlainFormatting</samp> becomes <samp>Wt::PlainText</samp></li>
</ul>
</li>
<li><samp>WText::setFormatting()</samp> has been renamed
to <samp>WText::setTextFormat()</samp> and
<samp>WText::formatting()</samp> has been renamed
to <samp>WText::textFormat()</samp>.</li>
</ul>
<hr />
<h2>Release 2.1.4 (July 4, 2008)</h2>
<p>The following has changed for building Wt:</p>
<ul>
<li>The CMake variable CONFIGURATION (which defaulted to
/etc/wt/wt_config.xml) is no longer used, but instead there is now a
CONFIGDIR (/etc/wt/) which is used to store configuration
files.
</li>
</ul>
<p>The following has changed in the wt_config.xml file:</p>
<ul>
<li>The <valgrind-path> setting for the FCGI connector may now
be a command-line including arguments</li>
</ul>
<p>This release should not contain changes that may break your
application.</p>
<hr />
<h2>Release 2.1.3 (May 20, 2008)</h2>
<p>This release should not contain changes that may break your
application.</p>
<hr />
<h2>Release 2.1.2 (April 14, 2008)</h2>
<p>The following changes may break your application build:</p>
<ul>
<li><samp>WTreeNode::expanded()</samp> has been renamed
to <samp>WTreeNode::isExpanded()</samp>.</li>
</ul>
<hr />
<h2>Release 2.1.1 (April 10, 2008)</h2>
<p>This release should not break any of your applications, but we did
deprecate some methods and enumeration types. You are advised to
migrate to the replacements methods since we will discontinue support
for the older ones in the future.</p>
<p>
The following methods and enumerations have been deprecated:
</p>
<ul>
<li><samp>enum SelectionUnit</samp> has been renamed
to <samp>SelectionBehavior</samp>. The old values map as follows on new
values: <samp>CellSelection</samp> becomes <samp>SelectItems</samp>;
<samp>RowSelection</samp> becomes <samp>SelectRows</samp>.</li>
<li><samp>WWidget::setOffset(int sides, WLength)</samp> is deprecated,
and the new method is <samp>WWidget::setOffsets(WLength, int
sides)</samp>: the argument order has been switched to be consistent
with the method signature of <samp>setMargin()</samp>
and <samp>setPadding()</samp>.</li>
<li><samp>WResource::suggestFilename()</samp> has been renamed to
<samp>WResource::suggestFileName()</samp>.</li>
</ul>
<p>
The following changes affect run-time behaviour:
</p>
<ul>
<li><samp>WTreeNode</samp> now supports a policy for when to show a child count
indication. The old behaviour was to always show the child count.
Now, by default this option is disabled. Use
<samp>WTreeNode::setChildCountPolicy(Enabled)</samp> to get the old
behaviour back, if you wish.</li>
</ul>
<hr />
<h2>Release 2.1.0</h2>
<p>The library dependencies have changed slightly.</p>
<p>
To build Wt 2.1.0, you need:
</p>
<ul>
<li>CMake 2.4 or later</li>
<li>boost 1.34.1 (boost 1.33.1 might should still work, but is
not recommended)</li>
<li>asio 0.3.9: either the boost or non-boost version <i>(only
for the http connector)</i></li>
<li><i>optionally</i>, openssl for HTTPS support <i>(only for the http
connector)</i></li>
<li><i>optionally</i>, libz for gzip compression support <i>(only for
the http connector)</i></li>
<li>fcgi library, including C++ bindings (libfcgi++)<i>(only for the
fcgi connector)</i></li>
</ul>
<p>Furthermore, the Wt::Ext library has been upgraded and now wraps
around the extjs 2.x library, instead of extjs 1.x.</p>
<p>Some API changes may need a porting effort:
</p>
<ul>
<li><samp>Ext::ProgressDialog</samp>: doesn't show by default, you
need to call show() to show the dialog.</li>
<li><samp>Ext::ContentPanel</samp>, <samp>Ext::BorderLayout</samp> have
been removed. They have been replaced with a stand-alone layout
system, that may manage contents in
an <samp>Ext::Container</samp>. The layout system provides
<samp>WBorderLayout</samp> and several other layout managers.</li>
<li><samp>WSignalMapper</samp> has been expanded to allow mapping of
signals with an extra argument, which is passed to the mapped
signal. Because of this, the signature of the class has been
expanded with an extra template argument. If you have forward
declarations to <samp>WSignalMapper</samp>, you will need to modify
these too (or simply include <samp>WSignalMapper</samp>).</li>
<li><samp>WAnchor</samp>: no longer uses a <samp>WLabel</samp> internally,
and the label-releated methods have been removed.</li>
</ul>
<hr />
<h2>Release 2.0.5</h2>
<ul>
<li><samp>WDialog</samp> (and <samp>WMessageBox</samp>) usage changed, and
is now more like Qt. When you are not
using <samp>WDialog::exec()</samp> or <samp>WMessageBox::show(...)</samp>,
then you must explictly <samp>show()</samp> the dialog to show it. You
can now also <samp>hide()</samp> the dialog if you want.
</li>
<li>
Moved several enums from within classes to the Wt namespace. This is
likely to break your code at compile time when you are using one. The
fix is to remove the class scope from the enum type or value.
<ul>
<li><samp>WScrollArea::Orientation</samp> -> <samp>Wt::Orientation</samp></li>
<li><samp>WMenu::Orientation</samp> -> <samp>Wt::Orientation</samp></li>
<li><samp>WMessageBox::StandardButton</samp> -> <samp>Wt::StandardButton</samp></li>
<li><samp>WMessageBox::Icon</samp> -> <samp>Wt::Icon</samp></li>
</ul>
</li>
</ul>
<hr />
<h2>Release 2.0.4</h2>
<i>Important: 2.0.4a contains a fix for a bug introduced in 2.0.4 that
reset the deploy-path in wthttpd.</i>
<p>
This release adds a few new features:
</p>
<ul>
<li><samp>WComboBox</samp> (and <samp>WSelectionBox</samp>) now use
a <samp>WAbstractItemModel</samp> in a more flexible model/view
system.</li>
<li>Stylesheets may be browser-conditional (by Patrick Fischer)</li>
<li>wthttpd may serve custom error pages (by Patrick Fischer)</li>
<li><samp>WResource</samp> can now access HTTP GET or POST query
arguments. This will break your code (at compile time) if you
have implemented your own <samp>WResource</samp>, since the signature of the
<samp>streamResourceData()</samp> method has been changed to pass
the arguments map as a second parameter.</li>
</ul>
<hr />
<h2>Release 2.0.1</h2>
<p>
This release fixes some build-related problems, as well as smaller
bugs. The main improvement in this release is related to use of Wt
in resource-constrained embedded systems.
</p>
<p>
The most visible change is that the dependency on the Xerces C++ XML
library was dropped in favour of the much smaller Mini-XML
library. The draw-back is a reduction of supported character
encodings to only UTF8 and UTF16, next to the default locale character
encoding (which is typically an 8-bit flavour).
</p>
<p>
When using the built-in httpd, you can now disable support for SSL
at compile time, freeing a number of SSL-related dependencies.
</p>
<p>
In the API, more comparison operators (== and !=) were added to
WString, and a WViewWidget was added for simple MVC widgets (with
the main purpose to reduce session-state at the server).
</p>
<hr />
<h2>Release 2.0.0</h2>
<p>
This release contains numerous changes which are likely to cause some
porting effort for Wt 1.1.x applications to work properly.
</p>
<p>
<b>If you are upgrading from a 1.99.x release, you will notice that
some of these notes have actually evolved, especially with respect to
WString and unicode support.</b>
</p>
<p>
Here is a list of changes with respect to Wt 1.1.x that are likely
to require your attention, and some tips on how to do the porting.
</p>
<h4>1) Namespace Wt</h4>
<p>All Wt classes are now inside the namespace <samp>Wt</samp>.</p>
<p>To handle this change, you will need to:
</p>
<ul>
<li>Wrap forward declarations to Wt widgets in header files inside a
Wt namespace, or <samp>#include <WFwdDeclarations></samp></li>
<li>and scope all Wt classes with <samp>Wt::</samp>, </li>
<li>or import the Wt namespace: <samp>using namespace Wt;</samp></li>
</ul>
<h4>2) WString</h4>
<p>
Previously, most widgets offered double methods that either used a
<samp>std::string</samp> for literal text, or a
<samp>WMessage</samp> for localized text.
</p>
<p>
In the new release, widgets use <samp>Wt::WString</samp> for both
literal and localized text. WString offers unicode support for both
literal as well as localized text. To create a literal string,
simply assign or construct a Wt::WString from that string. The
strings supported or both narrow and wide C and C++ strings. UTF8
encoded narrow strings may also be converted. To create a localized
string, use one of the static methods <samp>WString::tr(const
std::string key)</samp> and <samp>WWidget::tr(const std::string
key)</samp>.
</p>
<p>
To help with legacy code, WMessage is now a typedef for WString, but
is deprecated and should not be used in new code. Unfortunately, the
constructors <samp>WMessage(const char *text)</samp> and
<samp>WMessage(const std::string text)</samp>, changed meaning!
While previously they took a key to construct a localized message,
they now take a literal text (the exact opposite!), since they are
in fact plain WString() constructors. As a consequence your application
will display key values instead of resolving those values (but will
not break entirely).
</p>
<p>
The new approach offers the benefit of only requiring one method
signature for both literal and localizable text. This not only
simplifies our work, but more importantly by using
<samp>WString</samp> for displayed text in the API of your own
widgets, localization (including the automatic language switching)
comes automatically and is decided on by the user of your widget.
</p>
<p>
Fortunately, there is a straightforward trick to handle most consequences
of this change:
</p>
<ul>
<li>Replace <samp>WMessage(...)</samp> with <samp>tr(...)</samp>,</li>
<li>add <samp>.value()</samp> when using the result of functions such
as <samp>WText::text()</samp>,</li>
<li>change your own classes to use <samp>WString</samp>
wherever they expect some text that will be displayed, instead of
std::string or WMessage.</li>
</ul>
<h4>3) Wide string API</h4>
<p>
Since Wt 2.0.0, the API for Wt has been changed to use WString
instead of C++ narrow strings. WString supports both narrow and wide
strings, and provides conversion between both. It does not provide
string operations, however, and instead acts as a string
container. You should convert to a C++ string type to perform
operations. You should also not use WString outside of the user
interface part of your application.
</p>
<h4>4) No more wmain()</h4>
<p>
Previously, the Wt library implemented the <samp>main(int argc, char
**argv)</samp> function, and called a <samp>wmain()</samp> function
which created the WApplication instance.
</p>
<p>
Wt 2.0.0 allows multiple applications to run within a single process.
Therefore, the <samp>WApplication::exec()</samp> approach was no longer
feasible. The new approach requires that:
</p>
<ul>
<li>your main function should look like this:
<pre>
int main(int argc, char **argv)
{
return Wt::WRun(argc, argv, &createApplication);
}
</pre>
</li>
<li>where createApplication is a function of the following
signature:
<pre>
Wt::WApplication *createApplication(const Wt::WEnvironment& env)
{
// return a new application object.
}
</pre>
</li>
</ul>
<h4>5) Configuration in /etc/wt/wt_config.xml</h4>
<p>
Wt 2.0.0 uses a configuration file for a number of settings that
could previously be configured at build time of the library, or
in the API. The latter functions are:
</p>
<ul>
<li><samp>WApplication::setMaximumRquestSize()</samp></li>
<li><samp>WApplication::setIdleTimeout()</samp></li>
</ul>
<h4>6) Removed obsolete classes</h4>
<p>
Wt 2.0.0 removed a number of classes that were still in the widget
tree, but have been obsoleted by more flexible classes:
</p>
<ul>
<li><samp>WAbstractTab</samp>, <samp>WButtonTab</samp>, and <samp>WTabWidget</samp> are obsoleted by the more flexible <samp>WMenu</samp>.</li>
</ul>
<h4>7) Deprecate boost::regex from WRegExpValidator API</h4>
<p>
The constructor and methods that takes a boost::regex object in
the WRegExpValidator API have been deprecated, to remove the dependency
on boost from the public API. You should consider the std::string based
construtor and method instead.
</p>
<h4>8) WObject::emit() has been removed.</h4>
<p>
Since Wt 1.99.1, we have removed WObject::emit() function. Instead,
you may simply call the signal with its arguments, or use the
explicit emit method (recommended).</p>
<p>
To adapt your code, you should:
</p>
<ul>
<li>Replace all <samp>emit(MySignal(...))</samp> with <samp>MySignal(...)</samp> or <samp>MySignal.emit(...)</samp>
</li>
</ul>
<h4>9) WResource::streamResourceData() signature has changed.</h4>
<p>
Since Wt 2.0.0, WResource::streamResourceData() returns a boolean value
which indicates if all data has been streamed. If you have reimplemented
WResource for your applications, you must update the signature and return
true.
</p>
<p>
The change is relevant only within the new server-push support that is
now in Wt 2.0.0. This allows you to continuously append to the content
of a resource.
</p>
<h4>10) Rename of WJavascriptSlot to JSlot.</h4>
<hr />
<h2>Release 1.1.7</h2>
This release contains lots of additions and improvements, but should
be completely backwards-compatible.
<hr />
<h2>Release 1.1.6</h2>
There is one change which will impact the behaviour of current applications:
Currently, on exit, by default the last widget updates are shown. So, no
more good-bye message. This changes slightly when one needs to redirect()
to a new location: not when WApplication::exec() returns, but during the
same event handling as when calling WApplication::quit().
<hr />
<h2>Release 1.1.5</h2>
Nothing special...
<hr />
<h2>Release 1.1.4</h2>
Changes to impact everybody, since the previous release:
<ul>
<li>
The dependency for libxml++ (and its large number of dependencies) has
been dropped, and replaced by Xerces-C++ (which has no further dependencies).
</li>
<li>
Wt programs need to link against libwtfcgi.so, instead of libwt.so. In the
future Wt will also support different web-connnector systems besides
FastCGI.
</li>
<li>
The signatures of wmain() and WApplication constructor have changed:
new signatures are:
<ul>
<li><samp>int wmain(const WEnvironment& env)</samp></li>
<li><samp>WApplication::WApplication(const WEnvironment& env)</samp></li>
</ul>
</li>
</ul>
<h3>Other changes:</h3>
<ul>
<li>Support for unicode is implemented, but perhaps needs more testing
by non-Western people ? Only UTF-8 is supported currently.</li>
<li>Addition of a WTimer class -- see mission example.</li>
<li>Many bug fixes which should make Wt more robust against illegal CGI
requests (which are ignored), and now Wt should exit cleanly in more
(all?) circumstances.</li>
<li>Addition of feed-back for pending AJAX requests (does not work yet on
IE).</li>
<li>Support for style sheets is improved: now inline decoration styles
will override style sheet styles. See hangman or treelist examples.</li>
<li>The browser can be redirected to a new page. This is useful when the
application is terminated -- or to change during the application from
HTTP to HTTPS and back.</li>
<li>WValidationStatus API has changed -- less complicated now.</li>
</ul>
</body>
</html>
|