<?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" />
<!-- simple.qdoc -->
<title>Qt 4.8: Simple Example (ActiveQt)</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>Simple Example (ActiveQt)</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">
<h1 class="title">Simple Example (ActiveQt)</h1>
<span class="subtitle"></span>
<!-- $$$activeqt/simple-description -->
<div class="descr"> <a name="details"></a>
<p>Files:</p>
<ul>
<li><a href="activeqt-simple-main-cpp.html">activeqt/simple/main.cpp</a></li>
<li><a href="activeqt-simple-simple-pro.html">activeqt/simple/simple.pro</a></li>
</ul>
<p>The Simple example demonstrates the use of <a href="qaxbindable.html#requestPropertyChange">QAxBindable::requestPropertyChange</a>() and <a href="qaxbindable.html#propertyChanged">QAxBindable::propertyChanged</a>(), and the use of the default <a href="qaxfactory.html">QAxFactory</a> through the <tt>QAXFACTORY_DEFAULT()</tt> macro.</p>
<p>The ActiveX control in this example is a laid out <a href="qwidget.html">QWidget</a> with a <a href="qslider.html">QSlider</a>, a <a href="qlcdnumber.html">QLCDNumber</a> and a <a href="qlineedit.html">QLineEdit</a>. It provides a signal/slot/property interface to change the values of the slider and the line edit, and to get notified of any property changes.</p>
<p>The Qt implementation of the ActiveX for this example is</p>
<pre class="cpp"> <span class="keyword">class</span> <span class="type">QSimpleAX</span> : <span class="keyword">public</span> <span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">,</span> <span class="keyword">public</span> <span class="type"><a href="qaxbindable.html">QAxBindable</a></span>
{
Q_OBJECT
Q_PROPERTY( <span class="type"><a href="qstring.html">QString</a></span> text READ text WRITE setText )
Q_PROPERTY( <span class="type">int</span> value READ value WRITE setValue )
<span class="keyword">public</span>:
<span class="type">QSimpleAX</span>(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent <span class="operator">=</span> <span class="number">0</span>)
: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
{
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>vbox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>( <span class="keyword">this</span> );
slider <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qslider.html">QSlider</a></span>( <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="keyword">this</span> );
LCD <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlcdnumber.html">QLCDNumber</a></span>( <span class="number">3</span><span class="operator">,</span> <span class="keyword">this</span> );
edit <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>( <span class="keyword">this</span> );
connect( slider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(setValue(<span class="type">int</span>)) );
connect( edit<span class="operator">,</span> SIGNAL(textChanged(<span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(setText(<span class="type"><a href="qstring.html">QString</a></span>)) );
vbox<span class="operator">-</span><span class="operator">></span>addWidget( slider );
vbox<span class="operator">-</span><span class="operator">></span>addWidget( LCD );
vbox<span class="operator">-</span><span class="operator">></span>addWidget( edit );
}
<span class="type"><a href="qstring.html">QString</a></span> text() <span class="keyword">const</span>
{
<span class="keyword">return</span> edit<span class="operator">-</span><span class="operator">></span>text();
}
<span class="type">int</span> value() <span class="keyword">const</span>
{
<span class="keyword">return</span> slider<span class="operator">-</span><span class="operator">></span>value();
}
<span class="keyword">signals</span>:
<span class="type">void</span> someSignal();
<span class="type">void</span> valueChanged(<span class="type">int</span>);
<span class="type">void</span> textChanged(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span><span class="operator">&</span>);
<span class="keyword">public</span> <span class="keyword">slots</span>:
<span class="type">void</span> setText( <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>string )
{
<span class="keyword">if</span> ( <span class="operator">!</span>requestPropertyChange( <span class="string">"text"</span> ) )
<span class="keyword">return</span>;
edit<span class="operator">-</span><span class="operator">></span>blockSignals( <span class="keyword">true</span> );
edit<span class="operator">-</span><span class="operator">></span>setText( string );
edit<span class="operator">-</span><span class="operator">></span>blockSignals( <span class="keyword">false</span> );
<span class="keyword">emit</span> someSignal();
<span class="keyword">emit</span> textChanged( string );
propertyChanged( <span class="string">"text"</span> );
}
<span class="type">void</span> about()
{
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>information( <span class="keyword">this</span><span class="operator">,</span> <span class="string">"About QSimpleAX"</span><span class="operator">,</span> <span class="string">"This is a Qt widget, and this slot has been\n"</span>
<span class="string">"called through ActiveX/OLE automation!"</span> );
}
<span class="type">void</span> setValue( <span class="type">int</span> i )
{
<span class="keyword">if</span> ( <span class="operator">!</span>requestPropertyChange( <span class="string">"value"</span> ) )
<span class="keyword">return</span>;
slider<span class="operator">-</span><span class="operator">></span>blockSignals( <span class="keyword">true</span> );
slider<span class="operator">-</span><span class="operator">></span>setValue( i );
slider<span class="operator">-</span><span class="operator">></span>blockSignals( <span class="keyword">false</span> );
LCD<span class="operator">-</span><span class="operator">></span>display( i );
<span class="keyword">emit</span> valueChanged( i );
propertyChanged( <span class="string">"value"</span> );
}
<span class="keyword">private</span>:
<span class="type"><a href="qslider.html">QSlider</a></span> <span class="operator">*</span>slider;
<span class="type"><a href="qlcdnumber.html">QLCDNumber</a></span> <span class="operator">*</span>LCD;
<span class="type"><a href="qlineedit.html">QLineEdit</a></span> <span class="operator">*</span>edit;
};</pre>
<p>The control is exported using the default <a href="qaxfactory.html">QAxFactory</a></p>
<pre class="cpp"> <a href="qaxfactory.html#QAXFACTORY_DEFAULT">QAXFACTORY_DEFAULT</a>(<span class="type">QSimpleAX</span><span class="operator">,</span>
<span class="string">"{DF16845C-92CD-4AAB-A982-EB9840E74669}"</span><span class="operator">,</span>
<span class="string">"{616F620B-91C5-4410-A74E-6B81C76FFFE0}"</span><span class="operator">,</span>
<span class="string">"{E1816BBA-BF5D-4A31-9855-D6BA432055FF}"</span><span class="operator">,</span>
<span class="string">"{EC08F8FC-2754-47AB-8EFE-56A54057F34E}"</span><span class="operator">,</span>
<span class="string">"{A095BA0C-224F-4933-A458-2DD7F6B85D8F}"</span>)</pre>
<p>To build the example you must first build the <a href="qaxserver.html">QAxServer</a> library. Then run qmake and your make tool in <tt>examples/activeqt/simple</tt>.</p>
<p>The <a href="qaxserver-demo-simple.html">demonstration</a> requires your WebBrowser to support ActiveX controls, and scripting to be enabled.</p>
<p>The simple ActiveX control is embedded using the <tt><object></tt> tag.</p>
<pre class="cpp"> <object ID="QSimpleAX" CLASSID="CLSID:DF16845C-92CD-4AAB-A982-EB9840E74669"
CODEBASE="http://qt.nokia.com/demos/simpleax.cab">
<PARAM NAME="text" VALUE="A simple control" />
<PARAM NAME="value" VALUE="1" />
[Object not available! Did you forget to build and register the server?]
</object></pre>
<p>A simple HTML button is connected to the <a href="activeqt.html#activeqt">ActiveQt</a>'s about() slot.</p>
<pre class="cpp"> <FORM>
<INPUT TYPE="BUTTON" VALUE="About..." onClick="QSimpleAX.about()" />
</FORM></pre>
<p>A second ActiveX control - the standard Calendar Control - is instantiated</p>
<pre class="cpp"> <object ID="Calendar" CLASSID="CLSID:8E27C92B-1264-101C-8A2F-040224009C02">
[Standard Calendar control not available!]
<PARAM NAME="day" VALUE="1" />
</object></pre>
<p>Events from the ActiveX controls are handled using both Visual Basic Script and JavaScript.</p>
<pre class="cpp"> <SCRIPT LANGUAGE="VBScript">
Sub Calendar_Click()
MsgBox( "Calendar Clicked!" )
End Sub
Sub QSimpleAX_TextChanged( str )
document.title = str
End Sub
</SCRIPT>
<SCRIPT LANGUAGE="JavaScript">
function QSimpleAX::ValueChanged( Newvalue )
{
Calendar.Day = Newvalue;
}
</SCRIPT></pre>
</div>
<!-- @@@activeqt/simple -->
</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>
