qtdeclarative5-doc-html 5.2.1-3ubuntu15 / usr / share / qt5 / doc / qtqml / qqmlcomponent.html

This file is indexed.

/usr/share/qt5/doc/qtqml/qqmlcomponent.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
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
<?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" />
<!-- qqmlcomponent.cpp -->
  <title>QQmlComponent Class | 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><a href="qtqml-module.html">C++ Classes</a></li>
<li>QQmlComponent</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="#public-types">Public Types</a></li>
<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#public-slots">Public Slots</a></li>
<li class="level1"><a href="#signals">Signals</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
<li class="level2"><a href="#network-components">Network Components</a></li>
</ul>
</div>
<h1 class="title">QQmlComponent Class</h1>
<!-- $$$QQmlComponent-brief -->
<p>The QQmlComponent class encapsulates a QML component definition <a href="#details">More...</a></p>
<!-- @@@QQmlComponent -->
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> </b><tt><span class="preprocessor">#include &lt;QQmlComponent&gt;</span>
</tt></td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> <tt>QT += qml</tt></td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign">  Qt 5.0</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Instantiated By:</td><td class="memItemRight bottomAlign"> <a href="qml-qtqml-component.html">Component</a></td></tr></table><ul>
<li><a href="qqmlcomponent-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="public-types"></a>
<h2>Public Types</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#CompilationMode-enum">CompilationMode</a></b> { PreferSynchronous, Asynchronous }</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#Status-enum">Status</a></b> { Null, Ready, Loading, Error }</td></tr>
</table>
<a name="properties"></a>
<h2>Properties</h2>
<ul>
<li class="fn"><b><a href="qqmlcomponent.html#progress-prop">progress</a></b> : const qreal</li>
<li class="fn"><b><a href="qqmlcomponent.html#status-prop">status</a></b> : const Status</li>
<li class="fn"><b><a href="qqmlcomponent.html#url-prop">url</a></b> : const QUrl</li>
</ul>
<a name="public-functions"></a>
<h2>Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#QQmlComponent">QQmlComponent</a></b>(QQmlEngine *<i> engine</i>, QObject *<i> parent</i> = 0)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#QQmlComponent-3">QQmlComponent</a></b>(QQmlEngine *<i> engine</i>, const QString &amp;<i> fileName</i>, QObject *<i> parent</i> = 0)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#QQmlComponent-4">QQmlComponent</a></b>(QQmlEngine *<i> engine</i>, const QString &amp;<i> fileName</i>, CompilationMode<i> mode</i>, QObject *<i> parent</i> = 0)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#QQmlComponent-5">QQmlComponent</a></b>(QQmlEngine *<i> engine</i>, const QUrl &amp;<i> url</i>, QObject *<i> parent</i> = 0)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#QQmlComponent-6">QQmlComponent</a></b>(QQmlEngine *<i> engine</i>, const QUrl &amp;<i> url</i>, CompilationMode<i> mode</i>, QObject *<i> parent</i> = 0)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#dtor.QQmlComponent">~QQmlComponent</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QObject * </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#beginCreate">beginCreate</a></b>(QQmlContext *<i> publicContext</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#completeCreate">completeCreate</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QObject * </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#create">create</a></b>(QQmlContext *<i> context</i> = 0)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#create-2">create</a></b>(QQmlIncubator &amp;<i> incubator</i>, QQmlContext *<i> context</i> = 0, QQmlContext *<i> forContext</i> = 0)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QQmlContext * </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#creationContext">creationContext</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QList&lt;QQmlError&gt; </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#errors">errors</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#isError">isError</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#isLoading">isLoading</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#isNull">isNull</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#isReady">isReady</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#progress-prop">progress</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> Status </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#status-prop">status</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QUrl </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#url-prop">url</a></b>() const</td></tr>
</table>
<a name="public-slots"></a>
<h2>Public Slots</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#loadUrl">loadUrl</a></b>(const QUrl &amp;<i> url</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#loadUrl-2">loadUrl</a></b>(const QUrl &amp;<i> url</i>, CompilationMode<i> mode</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#setData">setData</a></b>(const QByteArray &amp;<i> data</i>, const QUrl &amp;<i> url</i>)</td></tr>
</table>
<a name="signals"></a>
<h2>Signals</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#progress-prop">progressChanged</a></b>(qreal<i> progress</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qqmlcomponent.html#status-prop">statusChanged</a></b>(QQmlComponent::Status<i> status</i>)</td></tr>
</table>
<a name="details"></a>
<!-- $$$QQmlComponent-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The QQmlComponent class encapsulates a QML component definition</p>
<p>Components are reusable, encapsulated QML types with well-defined interfaces.</p>
<p>A QQmlComponent instance can be created from a QML file. For example, if there is a <tt>main.qml</tt> file like this:</p>
<pre class="qml">import QtQuick 2.0

<span class="type">Item</span> {
    <span class="name">width</span>: <span class="number">200</span>
    <span class="name">height</span>: <span class="number">200</span>
}</pre>
<p>The following code loads this QML file as a component, creates an instance of this component using <a href="qqmlcomponent.html#create">create</a>(), and then queries the Item's width value:</p>
<pre class="cpp"><span class="type"><a href="qqmlengine.html">QQmlEngine</a></span> <span class="operator">*</span>engine <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qqmlengine.html">QQmlEngine</a></span>;
<span class="type">QQmlComponent</span> component(engine<span class="operator">,</span> <span class="type">QUrl</span><span class="operator">::</span>fromLocalFile(<span class="string">&quot;main.qml&quot;</span>));

<span class="type">QObject</span> <span class="operator">*</span>myObject <span class="operator">=</span> component<span class="operator">.</span><a href="qqmlcomponent.html#create">create</a>();
<span class="type">QQuickItem</span> <span class="operator">*</span>item <span class="operator">=</span> qobject_cast<span class="operator">&lt;</span><span class="type">QQuickItem</span><span class="operator">*</span><span class="operator">&gt;</span>(myObject);
<span class="type">int</span> width <span class="operator">=</span> item<span class="operator">-</span><span class="operator">&gt;</span>width();  <span class="comment">// width = 200</span></pre>
<a name="network-components"></a>
<h4>Network Components</h4>
<p>If the URL passed to QQmlComponent is a network resource, or if the QML document references a network resource, the QQmlComponent has to fetch the network data before it is able to create objects. In this case, the QQmlComponent will have a <a href="qqmlcomponent.html#Status-enum">Loading</a> <a href="qqmlcomponent.html#status-prop">status</a>. An application will have to wait until the component is <a href="qqmlcomponent.html#Status-enum">Ready</a> before calling <a href="qqmlcomponent.html#create">QQmlComponent::create</a>().</p>
<p>The following example shows how to load a QML file from a network resource. After creating the QQmlComponent, it tests whether the component is loading. If it is, it connects to the <a href="qqmlcomponent.html#status-prop">QQmlComponent::statusChanged</a>() signal and otherwise calls the <tt>continueLoading()</tt> method directly. Note that <a href="qqmlcomponent.html#isLoading">QQmlComponent::isLoading</a>() may be false for a network component if the component has been cached and is ready immediately.</p>
<pre class="cpp">MyApplication<span class="operator">::</span>MyApplication()
{
    <span class="comment">// ...</span>
    component <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QQmlComponent</span>(engine<span class="operator">,</span> <span class="type">QUrl</span>(<span class="string">&quot;http://www.example.com/main.qml&quot;</span>));
    <span class="keyword">if</span> (component<span class="operator">-</span><span class="operator">&gt;</span>isLoading())
        <span class="type">QObject</span><span class="operator">::</span>connect(component<span class="operator">,</span> SIGNAL(statusChanged(<span class="type">QQmlComponent</span><span class="operator">::</span>Status))<span class="operator">,</span>
                         <span class="keyword">this</span><span class="operator">,</span> SLOT(continueLoading()));
    <span class="keyword">else</span>
        continueLoading();
}

<span class="type">void</span> MyApplication<span class="operator">::</span>continueLoading()
{
    <span class="keyword">if</span> (component<span class="operator">-</span><span class="operator">&gt;</span>isError()) {
        qWarning() <span class="operator">&lt;</span><span class="operator">&lt;</span> component<span class="operator">-</span><span class="operator">&gt;</span>errors();
    } <span class="keyword">else</span> {
        <span class="type">QObject</span> <span class="operator">*</span>myObject <span class="operator">=</span> component<span class="operator">-</span><span class="operator">&gt;</span>create();
    }
}</pre>
<p>Note that the Qt Quick 1 version is named QDeclarativeComponent.</p>
</div>
<!-- @@@QQmlComponent -->
<div class="types">
<h2>Member Type Documentation</h2>
<!-- $$$CompilationMode$$$PreferSynchronous$$$Asynchronous -->
<h3 class="fn"><a name="CompilationMode-enum"></a>enum QQmlComponent::<span class="name">CompilationMode</span></h3>
<p>Specifies whether the <a href="qqmlcomponent.html">QQmlComponent</a> should load the component immediately, or asynchonously.</p>
<table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><tt>QQmlComponent::PreferSynchronous</tt></td><td class="topAlign"><tt>0</tt></td><td class="topAlign">Prefer loading/compiling the component immediately, blocking the thread. This is not always possible; for example, remote URLs will always load asynchronously.</td></tr>
<tr><td class="topAlign"><tt>QQmlComponent::Asynchronous</tt></td><td class="topAlign"><tt>1</tt></td><td class="topAlign">Load/compile the component in a background thread.</td></tr>
</table>
<!-- @@@CompilationMode -->
<!-- $$$Status$$$Null$$$Ready$$$Loading$$$Error -->
<h3 class="fn"><a name="Status-enum"></a>enum QQmlComponent::<span class="name">Status</span></h3>
<p>Specifies the loading status of the <a href="qqmlcomponent.html">QQmlComponent</a>.</p>
<table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><tt>QQmlComponent::Null</tt></td><td class="topAlign"><tt>0</tt></td><td class="topAlign">This <a href="qqmlcomponent.html">QQmlComponent</a> has no data. Call <a href="qqmlcomponent.html#loadUrl">loadUrl</a>() or <a href="qqmlcomponent.html#setData">setData</a>() to add QML content.</td></tr>
<tr><td class="topAlign"><tt>QQmlComponent::Ready</tt></td><td class="topAlign"><tt>1</tt></td><td class="topAlign">This <a href="qqmlcomponent.html">QQmlComponent</a> is ready and <a href="qqmlcomponent.html#create">create</a>() may be called.</td></tr>
<tr><td class="topAlign"><tt>QQmlComponent::Loading</tt></td><td class="topAlign"><tt>2</tt></td><td class="topAlign">This <a href="qqmlcomponent.html">QQmlComponent</a> is loading network data.</td></tr>
<tr><td class="topAlign"><tt>QQmlComponent::Error</tt></td><td class="topAlign"><tt>3</tt></td><td class="topAlign">An error has occurred. Call <a href="qqmlcomponent.html#errors">errors</a>() to retrieve a list of {<a href="qqmlerror.html">QQmlError</a>}{errors}.</td></tr>
</table>
<!-- @@@Status -->
</div>
<div class="prop">
<h2>Property Documentation</h2>
<!-- $$$progress-prop$$$progress$$$progressChangedqreal -->
<h3 class="fn"><a name="progress-prop"></a><span class="name">progress</span> : const <span class="type">qreal</span></h3>
<p>The progress of loading the component, from 0.0 (nothing loaded) to 1.0 (finished).</p>
<p><b>Access functions:</b></p>
<table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><span class="name"><b>progress</b></span>() const</td></tr>
</table>
<p><b>Notifier signal:</b></p>
<table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>progressChanged</b></span>(qreal<i> progress</i>)</td></tr>
</table>
<!-- @@@progress -->
<!-- $$$status-prop$$$status$$$statusChangedQQmlComponent::Status -->
<h3 class="fn"><a name="status-prop"></a><span class="name">status</span> : const <span class="type"><a href="qqmlcomponent.html#Status-enum">Status</a></span></h3>
<p>The component's current <a href="qqmlcomponent.html#Status-enum">status</a>.</p>
<p><b>Access functions:</b></p>
<table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> Status </td><td class="memItemRight bottomAlign"><span class="name"><b>status</b></span>() const</td></tr>
</table>
<p><b>Notifier signal:</b></p>
<table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>statusChanged</b></span>(QQmlComponent::Status<i> status</i>)</td></tr>
</table>
<!-- @@@status -->
<!-- $$$url-prop$$$url -->
<h3 class="fn"><a name="url-prop"></a><span class="name">url</span> : const <span class="type">QUrl</span></h3>
<p>The component URL. This is the URL passed to either the constructor, or the <a href="qqmlcomponent.html#loadUrl">loadUrl</a>(), or <a href="qqmlcomponent.html#setData">setData</a>() methods.</p>
<p><b>Access functions:</b></p>
<table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> QUrl </td><td class="memItemRight bottomAlign"><span class="name"><b>url</b></span>() const</td></tr>
</table>
<!-- @@@url -->
</div>
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QQmlComponent[overload1]$$$QQmlComponentQQmlEngine*QObject* -->
<h3 class="fn"><a name="QQmlComponent"></a>QQmlComponent::<span class="name">QQmlComponent</span>(<span class="type"><a href="qqmlengine.html">QQmlEngine</a></span> *<i> engine</i>, <span class="type">QObject</span> *<i> parent</i> = 0)</h3>
<p>Create a <a href="qqmlcomponent.html">QQmlComponent</a> with no data and give it the specified <i>engine</i> and <i>parent</i>. Set the data with <a href="qqmlcomponent.html#setData">setData</a>().</p>
<!-- @@@QQmlComponent -->
<!-- $$$QQmlComponent$$$QQmlComponentQQmlEngine*constQString&QObject* -->
<h3 class="fn"><a name="QQmlComponent-3"></a>QQmlComponent::<span class="name">QQmlComponent</span>(<span class="type"><a href="qqmlengine.html">QQmlEngine</a></span> *<i> engine</i>, const <span class="type">QString</span> &amp;<i> fileName</i>, <span class="type">QObject</span> *<i> parent</i> = 0)</h3>
<p>Create a <a href="qqmlcomponent.html">QQmlComponent</a> from the given <i>fileName</i> and give it the specified <i>parent</i> and <i>engine</i>.</p>
<p><b>See also </b><a href="qqmlcomponent.html#loadUrl">loadUrl</a>().</p>
<!-- @@@QQmlComponent -->
<!-- $$$QQmlComponent$$$QQmlComponentQQmlEngine*constQString&CompilationModeQObject* -->
<h3 class="fn"><a name="QQmlComponent-4"></a>QQmlComponent::<span class="name">QQmlComponent</span>(<span class="type"><a href="qqmlengine.html">QQmlEngine</a></span> *<i> engine</i>, const <span class="type">QString</span> &amp;<i> fileName</i>, <span class="type"><a href="qqmlcomponent.html#CompilationMode-enum">CompilationMode</a></span><i> mode</i>, <span class="type">QObject</span> *<i> parent</i> = 0)</h3>
<p>Create a <a href="qqmlcomponent.html">QQmlComponent</a> from the given <i>fileName</i> and give it the specified <i>parent</i> and <i>engine</i>. If <i>mode</i> is <a href="qqmlcomponent.html#CompilationMode-enum">Asynchronous</a>, the component will be loaded and compiled asynchronously.</p>
<p><b>See also </b><a href="qqmlcomponent.html#loadUrl">loadUrl</a>().</p>
<!-- @@@QQmlComponent -->
<!-- $$$QQmlComponent$$$QQmlComponentQQmlEngine*constQUrl&QObject* -->
<h3 class="fn"><a name="QQmlComponent-5"></a>QQmlComponent::<span class="name">QQmlComponent</span>(<span class="type"><a href="qqmlengine.html">QQmlEngine</a></span> *<i> engine</i>, const <span class="type">QUrl</span> &amp;<i> url</i>, <span class="type">QObject</span> *<i> parent</i> = 0)</h3>
<p>Create a <a href="qqmlcomponent.html">QQmlComponent</a> from the given <i>url</i> and give it the specified <i>parent</i> and <i>engine</i>.</p>
<p>Ensure that the URL provided is full and correct, in particular, use QUrl::fromLocalFile() when loading a file from the local filesystem.</p>
<p><b>See also </b><a href="qqmlcomponent.html#loadUrl">loadUrl</a>().</p>
<!-- @@@QQmlComponent -->
<!-- $$$QQmlComponent$$$QQmlComponentQQmlEngine*constQUrl&CompilationModeQObject* -->
<h3 class="fn"><a name="QQmlComponent-6"></a>QQmlComponent::<span class="name">QQmlComponent</span>(<span class="type"><a href="qqmlengine.html">QQmlEngine</a></span> *<i> engine</i>, const <span class="type">QUrl</span> &amp;<i> url</i>, <span class="type"><a href="qqmlcomponent.html#CompilationMode-enum">CompilationMode</a></span><i> mode</i>, <span class="type">QObject</span> *<i> parent</i> = 0)</h3>
<p>Create a <a href="qqmlcomponent.html">QQmlComponent</a> from the given <i>url</i> and give it the specified <i>parent</i> and <i>engine</i>. If <i>mode</i> is <a href="qqmlcomponent.html#CompilationMode-enum">Asynchronous</a>, the component will be loaded and compiled asynchronously.</p>
<p>Ensure that the URL provided is full and correct, in particular, use QUrl::fromLocalFile() when loading a file from the local filesystem.</p>
<p><b>See also </b><a href="qqmlcomponent.html#loadUrl">loadUrl</a>().</p>
<!-- @@@QQmlComponent -->
<!-- $$$~QQmlComponent[overload1]$$$~QQmlComponent -->
<h3 class="fn"><a name="dtor.QQmlComponent"></a>QQmlComponent::<span class="name">~QQmlComponent</span>()<tt> [virtual]</tt></h3>
<p>Destruct the <a href="qqmlcomponent.html">QQmlComponent</a>.</p>
<!-- @@@~QQmlComponent -->
<!-- $$$beginCreate[overload1]$$$beginCreateQQmlContext* -->
<h3 class="fn"><a name="beginCreate"></a><span class="type">QObject</span> * QQmlComponent::<span class="name">beginCreate</span>(<span class="type"><a href="qqmlcontext.html">QQmlContext</a></span> *<i> publicContext</i>)<tt> [virtual]</tt></h3>
<p>This method provides advanced control over component instance creation. In general, programmers should use <a href="qqmlcomponent.html#create">QQmlComponent::create</a>() to create a component.</p>
<p>Create an object instance from this component. Returns 0 if creation failed. <i>publicContext</i> specifies the context within which to create the object instance.</p>
<p>When <a href="qqmlcomponent.html">QQmlComponent</a> constructs an instance, it occurs in three steps:</p>
<ol class="1">
<li>The object hierarchy is created, and constant values are assigned.</li>
<li>Property bindings are evaluated for the first time.</li>
<li>If applicable, <a href="qqmlparserstatus.html#componentComplete">QQmlParserStatus::componentComplete</a>() is called on objects.</li>
</ol>
<p>QQmlComponent::beginCreate() differs from <a href="qqmlcomponent.html#create">QQmlComponent::create</a>() in that it only performs step 1. <a href="qqmlcomponent.html#completeCreate">QQmlComponent::completeCreate</a>() must be called to complete steps 2 and 3.</p>
<p>This breaking point is sometimes useful when using attached properties to communicate information to an instantiated component, as it allows their initial values to be configured before property bindings take effect.</p>
<p>The ownership of the returned object instance is transferred to the caller.</p>
<p><b>See also </b><a href="qqmlcomponent.html#completeCreate">completeCreate</a>() and <a href="qqmlengine.html#ObjectOwnership-enum">QQmlEngine::ObjectOwnership</a>.</p>
<!-- @@@beginCreate -->
<!-- $$$completeCreate[overload1]$$$completeCreate -->
<h3 class="fn"><a name="completeCreate"></a><span class="type">void</span> QQmlComponent::<span class="name">completeCreate</span>()<tt> [virtual]</tt></h3>
<p>This method provides advanced control over component instance creation. In general, programmers should use <a href="qqmlcomponent.html#create">QQmlComponent::create</a>() to create a component.</p>
<p>This function completes the component creation begun with <a href="qqmlcomponent.html#beginCreate">QQmlComponent::beginCreate</a>() and must be called afterwards.</p>
<p><b>See also </b><a href="qqmlcomponent.html#beginCreate">beginCreate</a>().</p>
<!-- @@@completeCreate -->
<!-- $$$create[overload1]$$$createQQmlContext* -->
<h3 class="fn"><a name="create"></a><span class="type">QObject</span> * QQmlComponent::<span class="name">create</span>(<span class="type"><a href="qqmlcontext.html">QQmlContext</a></span> *<i> context</i> = 0)<tt> [virtual]</tt></h3>
<p>Create an object instance from this component. Returns 0 if creation failed. <i>context</i> specifies the context within which to create the object instance.</p>
<p>If <i>context</i> is 0 (the default), it will create the instance in the engine' s <a href="qqmlengine.html#rootContext">root context</a>.</p>
<p>The ownership of the returned object instance is transferred to the caller.</p>
<p><b>See also </b><a href="qqmlengine.html#ObjectOwnership-enum">QQmlEngine::ObjectOwnership</a>.</p>
<!-- @@@create -->
<!-- $$$create$$$createQQmlIncubator&QQmlContext*QQmlContext* -->
<h3 class="fn"><a name="create-2"></a><span class="type">void</span> QQmlComponent::<span class="name">create</span>(<span class="type"><a href="qqmlincubator.html">QQmlIncubator</a></span> &amp;<i> incubator</i>, <span class="type"><a href="qqmlcontext.html">QQmlContext</a></span> *<i> context</i> = 0, <span class="type"><a href="qqmlcontext.html">QQmlContext</a></span> *<i> forContext</i> = 0)</h3>
<p>Create an object instance from this component using the provided <i>incubator</i>. <i>context</i> specifies the context within which to create the object instance.</p>
<p>If <i>context</i> is 0 (the default), it will create the instance in the engine's <a href="qqmlengine.html#rootContext">root context</a>.</p>
<p><i>forContext</i> specifies a context that this object creation depends upon. If the <i>forContext</i> is being created asynchronously, and the <a href="qqmlincubator.html#IncubationMode-enum">QQmlIncubator::IncubationMode</a> is <a href="qqmlincubator.html#IncubationMode-enum">QQmlIncubator::AsynchronousIfNested</a>, this object will also be created asynchronously. If <i>forContext</i> is 0 (the default), the <i>context</i> will be used for this decision.</p>
<p>The created object and its creation status are available via the <i>incubator</i>.</p>
<p><b>See also </b><a href="qqmlincubator.html">QQmlIncubator</a>.</p>
<!-- @@@create -->
<!-- $$$creationContext[overload1]$$$creationContext -->
<h3 class="fn"><a name="creationContext"></a><span class="type"><a href="qqmlcontext.html">QQmlContext</a></span> * QQmlComponent::<span class="name">creationContext</span>() const</h3>
<p>Returns the <a href="qqmlcontext.html">QQmlContext</a> the component was created in. This is only valid for components created directly from QML.</p>
<!-- @@@creationContext -->
<!-- $$$errors[overload1]$$$errors -->
<h3 class="fn"><a name="errors"></a><span class="type">QList</span>&lt;<span class="type"><a href="qqmlerror.html">QQmlError</a></span>&gt; QQmlComponent::<span class="name">errors</span>() const</h3>
<p>Return the list of errors that occurred during the last compile or create operation. An empty list is returned if <a href="qqmlcomponent.html#isError">isError</a>() is not set.</p>
<!-- @@@errors -->
<!-- $$$isError[overload1]$$$isError -->
<h3 class="fn"><a name="isError"></a><span class="type">bool</span> QQmlComponent::<span class="name">isError</span>() const</h3>
<p>Returns true if <a href="qqmlcomponent.html#status-prop">status</a>() == <a href="qqmlcomponent.html#Status-enum">QQmlComponent::Error</a>.</p>
<!-- @@@isError -->
<!-- $$$isLoading[overload1]$$$isLoading -->
<h3 class="fn"><a name="isLoading"></a><span class="type">bool</span> QQmlComponent::<span class="name">isLoading</span>() const</h3>
<p>Returns true if <a href="qqmlcomponent.html#status-prop">status</a>() == <a href="qqmlcomponent.html#Status-enum">QQmlComponent::Loading</a>.</p>
<!-- @@@isLoading -->
<!-- $$$isNull[overload1]$$$isNull -->
<h3 class="fn"><a name="isNull"></a><span class="type">bool</span> QQmlComponent::<span class="name">isNull</span>() const</h3>
<p>Returns true if <a href="qqmlcomponent.html#status-prop">status</a>() == <a href="qqmlcomponent.html#Status-enum">QQmlComponent::Null</a>.</p>
<!-- @@@isNull -->
<!-- $$$isReady[overload1]$$$isReady -->
<h3 class="fn"><a name="isReady"></a><span class="type">bool</span> QQmlComponent::<span class="name">isReady</span>() const</h3>
<p>Returns true if <a href="qqmlcomponent.html#status-prop">status</a>() == <a href="qqmlcomponent.html#Status-enum">QQmlComponent::Ready</a>.</p>
<!-- @@@isReady -->
<!-- $$$loadUrl[overload1]$$$loadUrlconstQUrl& -->
<h3 class="fn"><a name="loadUrl"></a><span class="type">void</span> QQmlComponent::<span class="name">loadUrl</span>(const <span class="type">QUrl</span> &amp;<i> url</i>)<tt> [slot]</tt></h3>
<p>Load the <a href="qqmlcomponent.html">QQmlComponent</a> from the provided <i>url</i>.</p>
<p>Ensure that the URL provided is full and correct, in particular, use QUrl::fromLocalFile() when loading a file from the local filesystem.</p>
<!-- @@@loadUrl -->
<!-- $$$loadUrl$$$loadUrlconstQUrl&CompilationMode -->
<h3 class="fn"><a name="loadUrl-2"></a><span class="type">void</span> QQmlComponent::<span class="name">loadUrl</span>(const <span class="type">QUrl</span> &amp;<i> url</i>, <span class="type"><a href="qqmlcomponent.html#CompilationMode-enum">CompilationMode</a></span><i> mode</i>)<tt> [slot]</tt></h3>
<p>Load the <a href="qqmlcomponent.html">QQmlComponent</a> from the provided <i>url</i>. If <i>mode</i> is <a href="qqmlcomponent.html#CompilationMode-enum">Asynchronous</a>, the component will be loaded and compiled asynchronously.</p>
<p>Ensure that the URL provided is full and correct, in particular, use QUrl::fromLocalFile() when loading a file from the local filesystem.</p>
<!-- @@@loadUrl -->
<!-- $$$setData[overload1]$$$setDataconstQByteArray&constQUrl& -->
<h3 class="fn"><a name="setData"></a><span class="type">void</span> QQmlComponent::<span class="name">setData</span>(const <span class="type">QByteArray</span> &amp;<i> data</i>, const <span class="type">QUrl</span> &amp;<i> url</i>)<tt> [slot]</tt></h3>
<p>Sets the <a href="qqmlcomponent.html">QQmlComponent</a> to use the given QML <i>data</i>. If <i>url</i> is provided, it is used to set the component name and to provide a base path for items resolved by this component.</p>
<!-- @@@setData -->
</div>
        </div>
       </div>
   </div>
   </div>
</div>
<div class="footer">
   <p>
   <acronym title="Copyright">&copy;</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>

APT Browse - Built by Thomas Orozco.