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6<title>A simple ActiveQt control (executable)</title>
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32<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>A simple ActiveQt control (executable)</h1>
33
34
35
36The ActiveX control in this example is a layouted <a href="qwidget.html">QWidget</a>
37with a <a href="qslider.html">QSlider</a>, a <a href="qlcdnumber.html">QLCDNumber</a> and a <a href="qlineedit.html">QLineEdit</a>.
38It provides a signal/slot/property interface to change the
39values of the slider and the line edit, and to get notified
40of any property changes.
41<p> It demonstrates the use of <a href="qaxbindable.html#requestPropertyChange">QAxBindable::requestPropertyChange</a>()
42and <a href="qaxbindable.html#propertyChanged">QAxBindable::propertyChanged</a>(), and the use of the default
43<a href="qaxfactory.html">QAxFactory</a> through the <a href="qaxfactory.html#QAXFACTORY_DEFAULT">QAXFACTORY_DEFAULT</a> macro.
44<p>
45
46<p> The Qt implementation of the ActiveX for this example is
47<pre> class QSimpleAX : public <a href="qwidget.html">QWidget</a>, public QAxBindable
48 {
49 <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a>
50 Q_PROPERTY( QString text READ text WRITE setText )
51 Q_PROPERTY( int value READ value WRITE setValue )
52 public:
53 QSimpleAX( <a href="qwidget.html">QWidget</a> *parent = 0, const char *name = 0 )
54 : <a href="qwidget.html">QWidget</a>( parent, name )
55 {
56 <a href="qvboxlayout.html">QVBoxLayout</a> *vbox = new <a href="qvboxlayout.html">QVBoxLayout</a>( this );
57
58 slider = new <a href="qslider.html">QSlider</a>( 0, 100, 1, 0, QSlider::Horizontal, this );
59 LCD = new <a href="qlcdnumber.html">QLCDNumber</a>( 3, this );
60 edit = new <a href="qlineedit.html">QLineEdit</a>( this );
61
62 <a name="x2528"></a> connect( slider, SIGNAL( <a href="qslider.html#valueChanged">valueChanged</a>( int ) ), this, SLOT( setValue(int) ) );
63 <a name="x2523"></a> connect( edit, SIGNAL(<a href="qlineedit.html#textChanged">textChanged</a>(const <a href="qstring.html">QString</a>&amp;)), this, SLOT(setText(const <a href="qstring.html">QString</a>&amp;)) );
64
65 vbox-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>( slider );
66 vbox-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>( LCD );
67 vbox-&gt;<a href="qboxlayout.html#addWidget">addWidget</a>( edit );
68 }
69
70 <a href="qstring.html">QString</a> text() const
71 {
72 <a name="x2522"></a> return edit-&gt;<a href="qlineedit.html#text">text</a>();
73 }
74 int value() const
75 {
76 <a name="x2527"></a> return slider-&gt;<a href="qslider.html#value">value</a>();
77 }
78
79 signals:
80 void someSignal();
81 void valueChanged(int);
82 void textChanged(const <a href="qstring.html">QString</a>&amp;);
83
84 public slots:
85 void setText( const <a href="qstring.html">QString</a> &amp;string )
86 {
87 if ( !requestPropertyChange( "text" ) )
88 return;
89
90 <a name="x2525"></a> edit-&gt;<a href="qobject.html#blockSignals">blockSignals</a>( TRUE );
91 <a name="x2521"></a> edit-&gt;<a href="qlineedit.html#setText">setText</a>( string );
92 edit-&gt;<a href="qobject.html#blockSignals">blockSignals</a>( FALSE );
93 emit someSignal();
94 emit textChanged( string );
95
96 propertyChanged( "text" );
97 }
98 void about()
99 {
100 <a name="x2524"></a> QMessageBox::<a href="qmessagebox.html#information">information</a>( this, "About QSimpleAX", "This is a Qt widget, and this slot has been\n"
101 "called through ActiveX/OLE automation!" );
102 }
103 void setValue( int i )
104 {
105 if ( !requestPropertyChange( "value" ) )
106 return;
107 slider-&gt;<a href="qobject.html#blockSignals">blockSignals</a>( TRUE );
108 <a name="x2526"></a> slider-&gt;<a href="qslider.html#setValue">setValue</a>( i );
109 slider-&gt;<a href="qobject.html#blockSignals">blockSignals</a>( FALSE );
110 LCD-&gt;<a href="qlcdnumber.html#display">display</a>( i );
111 emit valueChanged( i );
112
113 propertyChanged( "value" );
114 }
115
116 private:
117 <a href="qslider.html">QSlider</a> *slider;
118 <a href="qlcdnumber.html">QLCDNumber</a> *LCD;
119 <a href="qlineedit.html">QLineEdit</a> *edit;
120 };
121</pre>
122<p> The control is exported using the default <a href="qaxfactory.html">QAxFactory</a>
123<pre> QAXFACTORY_DEFAULT(QSimpleAX,
124 "{DF16845C-92CD-4AAB-A982-EB9840E74669}",
125 "{616F620B-91C5-4410-A74E-6B81C76FFFE0}",
126 "{E1816BBA-BF5D-4A31-9855-D6BA432055FF}",
127 "{EC08F8FC-2754-47AB-8EFE-56A54057F34E}",
128 "{A095BA0C-224F-4933-A458-2DD7F6B85D8F}")
129</pre>
130<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
131<tt>examples/simple</tt>.
132<p> <hr>
133<p> The <a href="qaxserver-demo-simple.html">demonstration</a> requires your
134WebBrowser to support ActiveX controls, and scripting to be enabled.
135<p> The simple ActiveX control is embedded using the <tt>&lt;object&gt;</tt> tag.
136
137
138<pre> &lt;object ID="QSimpleAX" CLASSID="CLSID:DF16845C-92CD-4AAB-A982-EB9840E74669"
139 CODEBASE=http://www.trolltech.com/demos/simpleax.cab&gt;
140 &lt;PARAM NAME="text" VALUE="A simple control"&gt;
141 &lt;PARAM NAME="value" VALUE="1"&gt;
142 [Object not available! Did you forget to build and register the server?]
143 &lt;/object&gt;
144</pre>
145<p> A simple HTML button is connected to the <a href="activeqt.html#ActiveQt">ActiveQt</a>'s about() slot.
146<pre> &lt;FORM&gt;
147 &lt;INPUT TYPE="BUTTON" VALUE="About..." onClick="QSimpleAX.about()"&gt;
148 &lt;/FORM&gt;
149</pre>
150<p> A second ActiveX control - the standard Calendar Control - is instantiated
151<pre> &lt;object ID="Calendar" CLASSID="CLSID:8E27C92B-1264-101C-8A2F-040224009C02"&gt;
152 [Standard Calendar control not available!]
153 &lt;PARAM NAME="day" VALUE="1"&gt;
154 &lt;/object&gt;
155</pre>
156<p> Events from the ActiveX controls are handled using both Visual Basic Script
157and JavaScript.
158<pre> &lt;SCRIPT LANGUAGE=VBScript&gt;
159 Sub Calendar_Click()
160 MsgBox( "Calendar Clicked!" )
161 End Sub
162
163 Sub QSimpleAX_TextChanged( str )
164 document.title = str
165 End Sub
166 &lt;/SCRIPT&gt;
167 &lt;SCRIPT LANGUAGE=JavaScript&gt;
168 function QSimpleAX::ValueChanged( Newvalue )
169 {
170 Calendar.Day = Newvalue;
171 }
172 &lt;/SCRIPT&gt;
173</pre><p>See also <a href="qaxserver-examples.html">The QAxServer Examples</a>.
174
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