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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. 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