/usr/share/qt5/doc/qtqml/qtqml-referenceexamples-default-example.html is in qtdeclarative5-doc-html 5.2.1-3ubuntu15.
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 | <?xml version="1.0" encoding="UTF-8"?>
<!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" xml:lang="en_US" lang="en_US">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!-- qml-extending.qdoc -->
<title>Extending QML - Default Property Example | QtQml 5.2</title>
<link rel="stylesheet" type="text/css" href="style/offline.css" />
</head>
<body>
<div class="header" id="qtdocheader">
<div class="main">
<div class="main-rounded">
<div class="navigationbar">
<ul>
<li>Qt 5.2</li>
<li><a href="qtqml-index.html">Qt QML</a></li>
<li>Extending QML - Default Property Example</li>
<li id="buildversion">
Qt 5.2.1 Reference Documentation</li>
</ul>
</div>
</div>
<div class="content">
<div class="line">
<div class="content mainContent">
<div class="toc">
<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#declaring-the-birthdayparty-class">Declaring the BirthdayParty class</a></li>
<li class="level1"><a href="#running-the-example">Running the example</a></li>
</ul>
</div>
<h1 class="title">Extending QML - Default Property Example</h1>
<span class="subtitle"></span>
<!-- $$$referenceexamples/default-description -->
<div class="descr"> <a name="details"></a>
<p>Default Property<p>This example builds on:</p>
<ul>
<li><a href="qtqml-referenceexamples-coercion-example.html">Extending QML - Inheritance and Coercion Example</a></li>
<li><a href="qtqml-referenceexamples-properties-example.html">Extending QML - Object and List Property Types Example</a></li>
<li><a href="qtqml-referenceexamples-adding-example.html">Extending QML - Adding Types Example</a></li>
</ul>
<p>The Default Property Example is a minor modification of the <a href="qtqml-referenceexamples-coercion-example.html">Extending QML - Inheritance and Coercion Example</a> that simplifies the specification of a BirthdayParty through the use of a default property.</p>
<pre class="qml"><span class="type">BirthdayParty</span> {
<span class="name">host</span>: <span class="name">Boy</span> {
<span class="name">name</span>: <span class="string">"Bob Jones"</span>
<span class="name">shoeSize</span>: <span class="number">12</span>
}
<span class="type">Boy</span> { <span class="name">name</span>: <span class="string">"Leo Hodges"</span> }
<span class="type">Boy</span> { <span class="name">name</span>: <span class="string">"Jack Smith"</span> }
<span class="type">Girl</span> { <span class="name">name</span>: <span class="string">"Anne Brown"</span> }
}</pre>
<a name="declaring-the-birthdayparty-class"></a>
<h2>Declaring the BirthdayParty class</h2>
<p>The only difference between this example and the last, is the addition of the <tt>DefaultProperty</tt> class info annotation.</p>
<pre class="cpp"><span class="keyword">class</span> BirthdayParty : <span class="keyword">public</span> <span class="type">QObject</span>
{
Q_OBJECT
Q_PROPERTY(Person <span class="operator">*</span>host READ host WRITE setHost)
Q_PROPERTY(<span class="type"><a href="qqmllistproperty.html">QQmlListProperty</a></span><span class="operator"><</span>Person<span class="operator">></span> guests READ guests)
Q_CLASSINFO(<span class="string">"DefaultProperty"</span><span class="operator">,</span> <span class="string">"guests"</span>)
<span class="keyword">public</span>:
BirthdayParty(<span class="type">QObject</span> <span class="operator">*</span>parent <span class="operator">=</span> <span class="number">0</span>);
Person <span class="operator">*</span>host() <span class="keyword">const</span>;
<span class="type">void</span> setHost(Person <span class="operator">*</span>);
<span class="type"><a href="qqmllistproperty.html">QQmlListProperty</a></span><span class="operator"><</span>Person<span class="operator">></span> guests();
<span class="type">int</span> guestCount() <span class="keyword">const</span>;
Person <span class="operator">*</span>guest(<span class="type">int</span>) <span class="keyword">const</span>;
<span class="keyword">private</span>:
Person <span class="operator">*</span>m_host;
<span class="type">QList</span><span class="operator"><</span>Person <span class="operator">*</span><span class="operator">></span> m_guests;
};</pre>
<p>The default property specifies the property to assign to whenever an explicit property is not specified, in the case of the BirthdayParty type the guest property. It is purely a syntactic simplification, the behavior is identical to specifying the property by name, but it can add a more natural feel in many situations. The default property must be either an object or list property.</p>
<a name="running-the-example"></a>
<h2>Running the example</h2>
<p>The main.cpp file in the example includes a simple shell application that loads and runs the QML snippet shown at the beginning of this page.</p>
<p>Files:</p>
<ul>
<li><a href="qtqml-referenceexamples-default-birthdayparty-cpp.html">referenceexamples/default/birthdayparty.cpp</a></li>
<li><a href="qtqml-referenceexamples-default-birthdayparty-h.html">referenceexamples/default/birthdayparty.h</a></li>
<li><a href="qtqml-referenceexamples-default-example-qml.html">referenceexamples/default/example.qml</a></li>
<li><a href="qtqml-referenceexamples-default-person-cpp.html">referenceexamples/default/person.cpp</a></li>
<li><a href="qtqml-referenceexamples-default-person-h.html">referenceexamples/default/person.h</a></li>
<li><a href="qtqml-referenceexamples-default-main-cpp.html">referenceexamples/default/main.cpp</a></li>
<li><a href="qtqml-referenceexamples-default-default-pro.html">referenceexamples/default/default.pro</a></li>
<li><a href="qtqml-referenceexamples-default-default-qrc.html">referenceexamples/default/default.qrc</a></li>
</ul>
</div>
<!-- @@@referenceexamples/default -->
</div>
</div>
</div>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its
subsidiaries. Documentation contributions included herein are the copyrights of
their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Digia, Qt and their respective logos are trademarks of Digia Plc in Finland and/or other countries worldwide. All other trademarks are property
of their respective owners. </p>
</div>
</body>
</html>
|