/usr/share/doc/xviewg/examples/cursor/hot_spot.c is in xview-examples 3.2p1.4-28.1.
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 | /*
* hot_spot.c -- create a cursor and query it's position on the
* screen and in the panel's window.
* Our own function, create_cursor(), attaches a new cursor to the
* window parameter passed into the function.
*/
#include <X11/X.h>
#include <X11/Xlib.h> /* for the xlib graphics */
#include <xview/xview.h>
#include <xview/panel.h>
#include <xview/cursor.h>
#include <xview/svrimage.h>
main(argc, argv)
int argc;
char *argv[];
{
Frame frame;
Panel panel;
void do_it();
xv_init(XV_INIT_ARGC_PTR_ARGV, &argc, argv, NULL);
/*
* Create a base frame, a panel, and a panel button.
*/
frame = (Frame)xv_create(XV_NULL, FRAME, NULL);
panel = (Panel)xv_create(frame, PANEL, NULL);
create_cursor(xv_get(panel, CANVAS_NTH_PAINT_WINDOW, 0));
(void) xv_create(panel, PANEL_BUTTON,
PANEL_LABEL_STRING, "Push Me",
PANEL_NOTIFY_PROC, do_it,
NULL);
window_fit(panel);
window_fit(frame);
window_main_loop(frame);
}
/*
* when user selects the panel button, the current mouse location is
* printed relative to the panel's window and to the screen.
* This location is governed by the hot spot on the cursor.
*/
void
do_it(item, event)
{
Rect *r;
Panel panel = (Panel)xv_get(item, PANEL_PARENT_PANEL);
r = (Rect *)xv_get(xv_get(panel, XV_ROOT), WIN_MOUSE_XY);
printf("Root window: %d %d\n", r->r_left, r->r_top);
r = (Rect *)xv_get(xv_get(panel, CANVAS_NTH_PAINT_WINDOW, 0), WIN_MOUSE_XY);
printf("Panel window: %d %d\n", r->r_left, r->r_top);
}
/*
* create_cursor() creates a bull's eye cursor and assigns it
* to the window (parameter).
*/
create_cursor(window)
Xv_Window window;
{
Xv_Cursor cursor;
Server_image image;
Pixmap pixmap;
Display *dpy = (Display *)xv_get(window, XV_DISPLAY);
GC gc;
XGCValues gcvalues;
image = (Server_image)xv_create(XV_NULL, SERVER_IMAGE,
XV_WIDTH, 16,
XV_HEIGHT, 16,
NULL);
pixmap = (Pixmap)xv_get(image, XV_XID);
/* Create GC with reversed foreground and background colors to
* clear pixmap first. Use 1 and 0 because pixmap is 1-bit deep.
*/
gcvalues.foreground = 0;
gcvalues.background = 1;
gc = XCreateGC(dpy, pixmap, GCForeground|GCBackground, &gcvalues);
XFillRectangle(dpy, pixmap, gc, 0, 0, 16, 16);
/*
* Reset foreground and background values for XDrawArc() routines.
*/
gcvalues.foreground = 1;
gcvalues.background = 0;
XChangeGC(dpy, gc, GCForeground | GCBackground, &gcvalues);
XDrawArc(dpy, pixmap, gc, 2, 2, 12, 12, 0, 360 * 64);
XDrawArc(dpy, pixmap, gc, 6, 6, 4, 4, 0, 360 * 64);
/* Creaste cursor and assign it to the window (parameter) */
cursor = xv_create(XV_NULL, CURSOR,
CURSOR_IMAGE, image,
CURSOR_XHOT, 7,
CURSOR_YHOT, 7,
NULL);
xv_set(window, WIN_CURSOR, cursor, NULL);
/* free the GC -- the cursor and the image must not be freed. */
XFreeGC(dpy, gc);
}
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