260 lines
14 KiB
HTML
260 lines
14 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.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" />
|
|
<!-- worldtimeclockbuilder.qdoc -->
|
|
<title>Qt 4.8: World Time Clock Builder Example</title>
|
|
<link rel="stylesheet" type="text/css" href="style/style.css" />
|
|
<script src="scripts/jquery.js" type="text/javascript"></script>
|
|
<script src="scripts/functions.js" type="text/javascript"></script>
|
|
<link rel="stylesheet" type="text/css" href="style/superfish.css" />
|
|
<link rel="stylesheet" type="text/css" href="style/narrow.css" />
|
|
<!--[if IE]>
|
|
<meta name="MSSmartTagsPreventParsing" content="true">
|
|
<meta http-equiv="imagetoolbar" content="no">
|
|
<![endif]-->
|
|
<!--[if lt IE 7]>
|
|
<link rel="stylesheet" type="text/css" href="style/style_ie6.css">
|
|
<![endif]-->
|
|
<!--[if IE 7]>
|
|
<link rel="stylesheet" type="text/css" href="style/style_ie7.css">
|
|
<![endif]-->
|
|
<!--[if IE 8]>
|
|
<link rel="stylesheet" type="text/css" href="style/style_ie8.css">
|
|
<![endif]-->
|
|
|
|
<script src="scripts/superfish.js" type="text/javascript"></script>
|
|
<script src="scripts/narrow.js" type="text/javascript"></script>
|
|
|
|
</head>
|
|
<body class="" onload="CheckEmptyAndLoadList();">
|
|
<div class="header" id="qtdocheader">
|
|
<div class="content">
|
|
<div id="nav-logo">
|
|
<a href="index.html">Home</a></div>
|
|
<a href="index.html" class="qtref"><span>Qt Reference Documentation</span></a>
|
|
<div id="narrowsearch"></div>
|
|
<div id="nav-topright">
|
|
<ul>
|
|
<li class="nav-topright-home"><a href="http://qt.digia.com/">Qt HOME</a></li>
|
|
<li class="nav-topright-dev"><a href="http://qt-project.org/">DEV</a></li>
|
|
<li class="nav-topright-doc nav-topright-doc-active"><a href="http://qt-project.org/doc/">
|
|
DOC</a></li>
|
|
<li class="nav-topright-blog"><a href="http://blog.qt.digia.com/">BLOG</a></li>
|
|
</ul>
|
|
</div>
|
|
<div id="shortCut">
|
|
<ul>
|
|
<li class="shortCut-topleft-inactive"><span><a href="index.html">Qt 4.8</a></span></li>
|
|
<li class="shortCut-topleft-active"><a href="http://qt-project.org/doc/">ALL VERSIONS </a></li>
|
|
</ul>
|
|
</div>
|
|
<ul class="sf-menu" id="narrowmenu">
|
|
<li><a href="#">API Lookup</a>
|
|
<ul>
|
|
<li><a href="classes.html">Class index</a></li>
|
|
<li><a href="functions.html">Function index</a></li>
|
|
<li><a href="modules.html">Modules</a></li>
|
|
<li><a href="namespaces.html">Namespaces</a></li>
|
|
<li><a href="qtglobal.html">Global Declarations</a></li>
|
|
<li><a href="qdeclarativeelements.html">QML elements</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#">Qt Topics</a>
|
|
<ul>
|
|
<li><a href="qt-basic-concepts.html">Programming with Qt</a></li>
|
|
<li><a href="qtquick.html">Device UIs & Qt Quick</a></li>
|
|
<li><a href="qt-gui-concepts.html">UI Design with Qt</a></li>
|
|
<li><a href="supported-platforms.html">Supported Platforms</a></li>
|
|
<li><a href="technology-apis.html">Qt and Key Technologies</a></li>
|
|
<li><a href="best-practices.html">How-To's and Best Practices</a></li>
|
|
</ul>
|
|
</li>
|
|
<li><a href="#">Examples</a>
|
|
<ul>
|
|
<li><a href="all-examples.html">Examples</a></li>
|
|
<li><a href="tutorials.html">Tutorials</a></li>
|
|
<li><a href="demos.html">Demos</a></li>
|
|
<li><a href="qdeclarativeexamples.html">QML Examples</a></li>
|
|
</ul>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
<div class="wrapper">
|
|
<div class="hd">
|
|
<span></span>
|
|
</div>
|
|
<div class="bd group">
|
|
<div class="sidebar">
|
|
<div class="searchlabel">
|
|
Search index:</div>
|
|
<div class="search" id="sidebarsearch">
|
|
<form id="qtdocsearch" action="" onsubmit="return false;">
|
|
<fieldset>
|
|
<input type="text" name="searchstring" id="pageType" value="" />
|
|
<div id="resultdialog">
|
|
<a href="#" id="resultclose">Close</a>
|
|
<p id="resultlinks" class="all"><a href="#" id="showallresults">All</a> | <a href="#" id="showapiresults">API</a> | <a href="#" id="showarticleresults">Articles</a> | <a href="#" id="showexampleresults">Examples</a></p>
|
|
<p id="searchcount" class="all"><span id="resultcount"></span><span id="apicount"></span><span id="articlecount"></span><span id="examplecount"></span> results:</p>
|
|
<ul id="resultlist" class="all">
|
|
</ul>
|
|
</div>
|
|
</fieldset>
|
|
</form>
|
|
</div>
|
|
<div class="box first bottombar" id="lookup">
|
|
<h2 title="API Lookup"><span></span>
|
|
API Lookup</h2>
|
|
<div id="list001" class="list">
|
|
<ul id="ul001" >
|
|
<li class="defaultLink"><a href="classes.html">Class index</a></li>
|
|
<li class="defaultLink"><a href="functions.html">Function index</a></li>
|
|
<li class="defaultLink"><a href="modules.html">Modules</a></li>
|
|
<li class="defaultLink"><a href="namespaces.html">Namespaces</a></li>
|
|
<li class="defaultLink"><a href="qtglobal.html">Global Declarations</a></li>
|
|
<li class="defaultLink"><a href="qdeclarativeelements.html">QML elements</a></li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
<div class="box bottombar" id="topics">
|
|
<h2 title="Qt Topics"><span></span>
|
|
Qt Topics</h2>
|
|
<div id="list002" class="list">
|
|
<ul id="ul002" >
|
|
<li class="defaultLink"><a href="qt-basic-concepts.html">Programming with Qt</a></li>
|
|
<li class="defaultLink"><a href="qtquick.html">Device UIs & Qt Quick</a></li>
|
|
<li class="defaultLink"><a href="qt-gui-concepts.html">UI Design with Qt</a></li>
|
|
<li class="defaultLink"><a href="supported-platforms.html">Supported Platforms</a></li>
|
|
<li class="defaultLink"><a href="technology-apis.html">Qt and Key Technologies</a></li>
|
|
<li class="defaultLink"><a href="best-practices.html">How-To's and Best Practices</a></li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
<div class="box" id="examples">
|
|
<h2 title="Examples"><span></span>
|
|
Examples</h2>
|
|
<div id="list003" class="list">
|
|
<ul id="ul003">
|
|
<li class="defaultLink"><a href="all-examples.html">Examples</a></li>
|
|
<li class="defaultLink"><a href="tutorials.html">Tutorials</a></li>
|
|
<li class="defaultLink"><a href="demos.html">Demos</a></li>
|
|
<li class="defaultLink"><a href="qdeclarativeexamples.html">QML Examples</a></li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="wrap">
|
|
<div class="toolbar">
|
|
<div class="breadcrumb toolblock">
|
|
<ul>
|
|
<li class="first"><a href="index.html">Home</a></li>
|
|
<!-- Breadcrumbs go here -->
|
|
<li><a href="all-examples.html">Examples</a></li>
|
|
<li>World Time Clock Builder Example</li>
|
|
</ul>
|
|
</div>
|
|
<div class="toolbuttons toolblock">
|
|
<ul>
|
|
<li id="smallA" class="t_button">A</li>
|
|
<li id="medA" class="t_button active">A</li>
|
|
<li id="bigA" class="t_button">A</li>
|
|
<li id="print" class="t_button"><a href="javascript:this.print();">
|
|
<span>Print</span></a></li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
<div class="content mainContent">
|
|
<div class="toc">
|
|
<h3><a name="toc">Contents</a></h3>
|
|
<ul>
|
|
<li class="level1"><a href="#preparation">Preparation</a></li>
|
|
<li class="level1"><a href="#loading-and-building-the-form">Loading and Building the Form</a></li>
|
|
</ul>
|
|
</div>
|
|
<h1 class="title">World Time Clock Builder Example</h1>
|
|
<span class="subtitle"></span>
|
|
<!-- $$$designer/worldtimeclockbuilder-description -->
|
|
<div class="descr"> <a name="details"></a>
|
|
<p>Files:</p>
|
|
<ul>
|
|
<li><a href="designer-worldtimeclockbuilder-form-ui.html">designer/worldtimeclockbuilder/form.ui</a></li>
|
|
<li><a href="designer-worldtimeclockbuilder-main-cpp.html">designer/worldtimeclockbuilder/main.cpp</a></li>
|
|
<li><a href="designer-worldtimeclockbuilder-worldtimeclockbuilder-pro.html">designer/worldtimeclockbuilder/worldtimeclockbuilder.pro</a></li>
|
|
<li><a href="designer-worldtimeclockbuilder-worldtimeclockbuilder-qrc.html">designer/worldtimeclockbuilder/worldtimeclockbuilder.qrc</a></li>
|
|
</ul>
|
|
<p>The World Time Clock Builder example shows how forms created with Qt Designer that contain custom widgets can be dynamically generated at run-time.<p class="centerAlign"><img src="images/worldtimeclockbuilder-example.png" alt="" /></p><p>This example uses a form containing the custom widget plugin described in the <a href="designer-worldtimeclockplugin.html">World Time Clock Plugin</a> example, and dynamically generates a user interface using the <a href="quiloader.html">QUiLoader</a> class, part of the <a href="qtuitools.html">QtUiTools</a> module.</p>
|
|
<a name="preparation"></a>
|
|
<h2>Preparation</h2>
|
|
<p>As with the <a href="designer-calculatorbuilder.html">Calculator Builder</a> example, the project file for this example needs to include the appropriate definitions to ensure that it is built against the required Qt modules.</p>
|
|
<pre class="cpp"> CONFIG += uitools
|
|
SOURCES = main.cpp
|
|
RESOURCES = worldtimeclockbuilder.qrc</pre>
|
|
<p>By appending <tt>form</tt> to the <tt>CONFIG</tt> declaration, we instruct <tt>qmake</tt> to generate a dependency on the <tt>libQtUiTools</tt> library containing the <a href="qtuitools.html">QtUiTools</a> classes.</p>
|
|
<p>Note that we do not inform <tt>qmake</tt> about any UI files, and so none will be processed and built into the application. The resource file contains an entry for the particular form that we wish to use:</p>
|
|
<pre class="cpp"> <!DOCTYPE RCC><RCC version="1.0">
|
|
<qresource prefix="/forms">
|
|
<file>form.ui</file>
|
|
</qresource>
|
|
</RCC></pre>
|
|
<p>Forms do not need to be included with the application in this way. We only include a form in the application's resources for convenience, and to keep the example short.</p>
|
|
<a name="loading-and-building-the-form"></a>
|
|
<h2>Loading and Building the Form</h2>
|
|
<p>Since this example only loads and displays a pre-prepared form, all of the work can be done in the main() function. We are using a class from the <a href="qtuitools.html">QtUiTools</a> library so, in addition to any other Qt classes that are normally required to write an application, we must include the appropriate header file:</p>
|
|
<pre class="cpp"> <span class="preprocessor">#include <QtUiTools></span></pre>
|
|
<p>The main function initializes the resource system with the <a href="qdir.html#Q_INIT_RESOURCE">Q_INIT_RESOURCE</a>() macro and constructs an <a href="qapplication.html">QApplication</a> instance in the usual way:</p>
|
|
<pre class="cpp"> <span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span>argv<span class="operator">[</span><span class="operator">]</span>)
|
|
{
|
|
Q_INIT_RESOURCE(worldtimeclockbuilder);
|
|
|
|
<span class="type"><a href="qapplication.html">QApplication</a></span> app(argc<span class="operator">,</span> argv);
|
|
|
|
<span class="type"><a href="quiloader.html">QUiLoader</a></span> loader;</pre>
|
|
<p>We construct a <a href="quiloader.html">QUiLoader</a> object to handle the form we want to use.</p>
|
|
<p>The form itself is obtained from the resource file system using the path defined in the resource file. We use the form loader to load and construct the form:</p>
|
|
<pre class="cpp"> <span class="type"><a href="qfile.html">QFile</a></span> file(<span class="string">":/forms/form.ui"</span>);
|
|
file<span class="operator">.</span>open(<span class="type"><a href="qfile.html">QFile</a></span><span class="operator">::</span>ReadOnly);
|
|
|
|
<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>widget <span class="operator">=</span> loader<span class="operator">.</span>load(<span class="operator">&</span>file);
|
|
|
|
file<span class="operator">.</span>close();
|
|
widget<span class="operator">-</span><span class="operator">></span>show();</pre>
|
|
<p>Once the form has been loaded, the resource file can be closed and the widget is shown.</p>
|
|
<pre class="cpp"> <span class="keyword">return</span> app<span class="operator">.</span>exec();
|
|
}</pre>
|
|
<p>The form loader ensures that all the signal and slot connections between objects in the form are set up correctly when the form is loaded. As a result, the time is updated by the World Time Clock widget, and the time zone spin box can be used to change the position of the hour hand.</p>
|
|
</div>
|
|
<!-- @@@designer/worldtimeclockbuilder -->
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="ft">
|
|
<span></span>
|
|
</div>
|
|
</div>
|
|
<div class="footer">
|
|
<p>
|
|
<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
|
|
Documentation contributions included herein are the copyrights of
|
|
their respective owners.</p>
|
|
<br />
|
|
<p>
|
|
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.</p>
|
|
<p>
|
|
Documentation sources may be obtained from <a href="http://www.qt-project.org">
|
|
www.qt-project.org</a>.</p>
|
|
<br />
|
|
<p>
|
|
Qt and respective logos are trademarks of The Qt Company Ltd
|
|
in Finland and/or other countries worldwide. All other trademarks are property
|
|
of their respective owners. <a title="Privacy Policy"
|
|
href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p>
|
|
</div>
|
|
|
|
<script src="scripts/functions.js" type="text/javascript"></script>
|
|
</body>
|
|
</html>
|