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251 lines
16 KiB
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/extensions/activeqt/container/qaxwidget.cpp:1336 -->
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<title>QAxWidget Class</title>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QAxWidget Class Reference<br><small>[<a href="qaxcontainer.html">QAxContainer module</a>]</small></h1>
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<p>The QAxWidget class is a QWidget that wraps an ActiveX control.
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<a href="#details">More...</a>
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<p>This class is part of the <b>Qt ActiveQt Extension</b>.
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<p><tt>#include <<a href="qaxwidget-h.html">qaxwidget.h</a>></tt>
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<p>Inherits <a href="qwidget.html">QWidget</a> and <a href="qaxbase.html">QAxBase</a>.
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<p><a href="qaxwidget-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#QAxWidget"><b>QAxWidget</b></a> ( QWidget * parent = 0, const char * name = 0, WFlags f = 0 )</li>
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<li class=fn><a href="#QAxWidget-2"><b>QAxWidget</b></a> ( const QString & c, QWidget * parent = 0, const char * name = 0, WFlags f = 0 )</li>
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<li class=fn><a href="#QAxWidget-3"><b>QAxWidget</b></a> ( IUnknown * iface, QWidget * parent = 0, const char * name = 0, WFlags f = 0 )</li>
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<li class=fn><a href="#~QAxWidget"><b>~QAxWidget</b></a> ()</li>
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</ul>
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<h2>Important Inherited Members</h2>
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<ul>
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<li class=fn>QVariant <a href="#dynamicCall"><b>dynamicCall</b></a> ( const QCString & function, const QVariant & var1 = QVariant ( ), const QVariant & var2 = QVariant ( ), const QVariant & var3 = QVariant ( ), const QVariant & var4 = QVariant ( ), const QVariant & var5 = QVariant ( ), const QVariant & var6 = QVariant ( ), const QVariant & var7 = QVariant ( ), const QVariant & var8 = QVariant ( ) )</li>
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<li class=fn>QVariant <a href="#dynamicCall-2"><b>dynamicCall</b></a> ( const QCString & function, QValueList<QVariant> & vars )</li>
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<li class=fn>QAxObject * <a href="#querySubObject"><b>querySubObject</b></a> ( const QCString & name, const QVariant & var1 = QVariant ( ), const QVariant & var2 = QVariant ( ), const QVariant & var3 = QVariant ( ), const QVariant & var4 = QVariant ( ), const QVariant & var5 = QVariant ( ), const QVariant & var6 = QVariant ( ), const QVariant & var7 = QVariant ( ), const QVariant & var8 = QVariant ( ) )</li>
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</ul>
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<h2>Protected Members</h2>
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<ul>
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<li class=fn>virtual bool <a href="#createHostWindow"><b>createHostWindow</b></a> ( bool initialized )</li>
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<li class=fn>virtual bool <a href="#translateKeyEvent"><b>translateKeyEvent</b></a> ( int message, int keycode ) const</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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<p> This class is defined in the <b>Qt <a href="activeqt.html#ActiveQt">ActiveQt</a> Extension</b>, which can be found in the <tt>qt/extensions</tt> directory. It is not included in the main Qt API.
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<p>
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The QAxWidget class is a <a href="qwidget.html">QWidget</a> that wraps an ActiveX control.
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<p>
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<p> A QAxWidget can be instantiated as an empty object, with the name
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of the ActiveX control it should wrap, or with an existing
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interface pointer to the ActiveX control. The ActiveX control's
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properties, methods and events which only use <a href="qaxbase.html">supported data types</a>, become available as Qt properties,
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slots and signals. The base class <a href="qaxbase.html">QAxBase</a> provides an API to
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access the ActiveX directly through the IUnknown pointer.
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<p> QAxWidget is a QWidget and can be used as such, e.g. it can be
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organized in a widget hierarchy, receive events or act as an event
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filter. Standard widget properties, e.g. <a href="qwidget.html#enabled-prop">enabled</a> are supported, but it depends on the ActiveX
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control to implement support for ambient properties like e.g.
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palette or font. QAxWidget tries to provide the necessary hints.
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<p> <b>Warning:</b>
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You can subclass QAxWidget, but you cannot use the <a href="metaobjects.html#Q_OBJECT">Q_OBJECT</a> macro
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in the subclass (the generated <a href="moc.html#moc">moc</a>-file will not compile), so you
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cannot add further signals, slots or properties. This limitation
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is due to the metaobject information generated in runtime. To work
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around this problem, aggregate the QAxWidget as a member of the
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<a href="qobject.html">QObject</a> subclass.
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<p>
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="QAxWidget"></a>QAxWidget::QAxWidget ( <a href="qwidget.html">QWidget</a> * parent = 0, const char * name = 0, WFlags f = 0 )
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</h3>
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Creates an empty QAxWidget widget and propagates <em>parent</em>, <em>name</em> and <em>f</em> to the <a href="qwidget.html">QWidget</a> constructor. To initialize a control,
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call <a href="qaxbase.html#setControl">setControl</a>.
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<h3 class=fn><a name="QAxWidget-2"></a>QAxWidget::QAxWidget ( const <a href="qstring.html">QString</a> & c, <a href="qwidget.html">QWidget</a> * parent = 0, const char * name = 0, WFlags f = 0 )
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</h3>
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Creates an QAxWidget widget and initializes the ActiveX control <em>c</em>.
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<em>parent</em>, <em>name</em> and <em>f</em> are propagated to the <a href="qwidget.html">QWidget</a> contructor.
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<p> <p>See also <a href="qaxbase.html#control-prop">control</a>.
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<h3 class=fn><a name="QAxWidget-3"></a>QAxWidget::QAxWidget ( IUnknown * iface, <a href="qwidget.html">QWidget</a> * parent = 0, const char * name = 0, WFlags f = 0 )
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</h3>
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Creates a QAxWidget that wraps the COM object referenced by <em>iface</em>.
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<em>parent</em>, <em>name</em> and <em>f</em> are propagated to the <a href="qwidget.html">QWidget</a> contructor.
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<h3 class=fn><a name="~QAxWidget"></a>QAxWidget::~QAxWidget ()
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</h3>
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Shuts down the ActiveX control and destroys the QAxWidget widget,
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cleaning up all allocated resources.
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<p> <p>See also <a href="qaxbase.html#clear">clear</a>().
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<h3 class=fn>bool <a name="createHostWindow"></a>QAxWidget::createHostWindow ( bool initialized )<tt> [virtual protected]</tt>
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</h3>
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Creates the client site for the ActiveX control, and returns TRUE if
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the control could be embedded successfully, otherwise returns FALSE.
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If <em>initialized</em> is TRUE the control has already been initialized.
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<p> This function is called by <a href="qaxbase.html#initialize">initialize</a>(). If you reimplement initialize
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to customize the actual control instantiation, call this function in your
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reimplementation to have the control embedded by the default client side.
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Creates the client site for the ActiveX control, and returns TRUE if
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the control could be embedded successfully, otherwise returns FALSE.
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<h3 class=fn><a href="qvariant.html">QVariant</a> <a name="dynamicCall"></a>QAxBase::dynamicCall ( const <a href="qcstring.html">QCString</a> & function, const <a href="qvariant.html">QVariant</a> & var1 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var2 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var3 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var4 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var5 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var6 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var7 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var8 = QVariant ( ) )
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</h3>
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Calls the COM object's method <em>function</em>, passing the
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parameters <em>var1</em>, <em>var1</em>, <em>var2</em>, <em>var3</em>, <em>var4</em>, <em>var5</em>,
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<em>var6</em>, <em>var7</em> and <em>var8</em>, and returns the value returned by
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the method, or an invalid <a href="qvariant.html">QVariant</a> if the method does not return
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a value or when the function call failed.
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<p> If <em>function</em> is a method of the object the string must be provided
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as the full prototype, for example as it would be written in a
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<a href="qobject.html#connect">QObject::connect</a>() call.
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<pre>
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activeX->dynamicCall( "Navigate(const <a href="qstring.html">QString</a>&)", "www.trolltech.com" );
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</pre>
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<p> Alternatively a function can be called passing the parameters embedded
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in the string, e.g. above function can also be invoked using
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<pre>
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activeX->dynamicCall("Navigate(\"www.trolltech.com\");
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</pre>
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All parameters are passed as strings; it depends on the control whether
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they are interpreted correctly, and is slower than using the prototype
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with correctly typed parameters.
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<p> If <em>function</em> is a property the string has to be the name of the
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property. The property setter is called when <em>var1</em> is a valid QVariant,
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otherwise the getter is called.
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<pre>
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activeX->dynamicCall( "Value", 5 );
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<a href="qstring.html">QString</a> text = activeX->dynamicCall( "Text" ).toString();
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</pre>
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Note that it is faster to get and set properties using
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<a href="qobject.html#property">QObject::property</a>() and <a href="qobject.html#setProperty">QObject::setProperty</a>().
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<p> It is only possible to call functions through <a href="qaxbase.html#dynamicCall">dynamicCall</a>() that
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have parameters or return values of datatypes supported by
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<a href="qvariant.html">QVariant</a>. See the <a href="qaxbase.html">QAxBase</a> class documentation for a list of
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supported and unsupported datatypes. If you want to call functions
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that have unsupported datatypes in the parameter list, use
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<a href="qaxbase.html#queryInterface">queryInterface</a>() to retrieve the appropriate COM interface, and
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use the function directly.
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<p> <pre>
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IWebBrowser2 *webBrowser = 0;
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activeX->queryInterface( IID_IWebBrowser2, (void**)&webBrowser );
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if ( webBrowser ) {
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webBrowser->Navigate2( pvarURL );
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webBrowser->Release();
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}
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</pre>
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<p> This is also more efficient.
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<p>Example: <a href="qaxcontainer-example-qutlook.html#x2720">qutlook/centralwidget.cpp</a>.
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<h3 class=fn><a href="qvariant.html">QVariant</a> <a name="dynamicCall-2"></a>QAxBase::dynamicCall ( const <a href="qcstring.html">QCString</a> & function, <a href="qvaluelist.html">QValueList</a><QVariant> & vars )
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Calls the COM object's method <em>function</em>, passing the
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parameters in <em>vars</em>, and returns the value returned by
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the method. If the method does not return a value or when
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the function call failed this function returns an invalid
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<a href="qvariant.html">QVariant</a> object.
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<p> The QVariant objects in <em>vars</em> are updated when the method has
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out-parameters.
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<h3 class=fn><a href="qaxobject.html">QAxObject</a> * <a name="querySubObject"></a>QAxBase::querySubObject ( const <a href="qcstring.html">QCString</a> & name, const <a href="qvariant.html">QVariant</a> & var1 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var2 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var3 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var4 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var5 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var6 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var7 = QVariant ( ), const <a href="qvariant.html">QVariant</a> & var8 = QVariant ( ) )
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</h3>
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Returns a pointer to a <a href="qaxobject.html">QAxObject</a> wrapping the COM object provided
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by the method or property <em>name</em>, passing passing the parameters
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<em>var1</em>, <em>var1</em>, <em>var2</em>, <em>var3</em>, <em>var4</em>, <em>var5</em>, <em>var6</em>,
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<em>var7</em> and <em>var8</em>.
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<p> If <em>name</em> is provided by a method the string must include the
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full function prototype.
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<p> If <em>name</em> is a property the string must be the name of the property,
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and <em>var1</em>, ... <em>var8</em> are ignored.
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<p> The returned QAxObject is a child of this object (which is either of
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type QAxObject or QAxWidget), and is deleted when this object is
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deleted. It is however safe to delete the returned object yourself,
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and you should do so when you iterate over lists of subobjects.
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<p> COM enabled applications usually have an object model publishing
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certain elements of the application as dispatch interfaces. Use
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this method to navigate the hierarchy of the object model, e.g.
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<p> <pre>
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QAxWidget outlook( "Outlook.Application" );
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<a href="qaxobject.html">QAxObject</a> *session = outlook.<a href="qaxbase.html#querySubObject">querySubObject</a>( "Session" );
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if ( session ) {
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<a href="qaxobject.html">QAxObject</a> *defFolder = session-><a href="qaxbase.html#querySubObject">querySubObject</a>(
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"GetDefaultFolder(OlDefaultFolders)",
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"olFolderContacts" );
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//...
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}
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</pre>
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<p>Example: <a href="qaxcontainer-example-qutlook.html#x2721">qutlook/centralwidget.cpp</a>.
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<h3 class=fn>bool <a name="translateKeyEvent"></a>QAxWidget::translateKeyEvent ( int message, int keycode ) const<tt> [virtual protected]</tt>
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</h3>
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Reimplement this function to pass certain key events to the
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ActiveX control. <em>message</em> is the Window message identifier
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specifying the message type (ie. WM_KEYDOWN), and <em>keycode</em> is
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the virtual keycode (ie. VK_TAB).
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<p> If the function returns TRUE the key event is passed on to the
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ActiveX control, which then either processes the event or passes
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the event on to Qt.
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<p> If the function returns FALSE the processing of the key event is
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ignored by <a href="activeqt.html#ActiveQt">ActiveQt</a>, ie. the ActiveX control might handle it or
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not.
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<p> The default implementation returns TRUE for the following cases:
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<p> <center><table cellpadding="4" cellspacing="2" border="0">
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<tr bgcolor="#a2c511">
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<th valign="top">WM_SYSKEYDOWN
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<th valign="top">WM_SYSKEYUP
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<th valign="top">WM_KEYDOWN
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<tr bgcolor="#f0f0f0">
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<td valign="top">All keycodes
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<td valign="top">VK_MENU
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<td valign="top">VK_TAB, VK_DELETE and all non-arrow-keys in combination with VK_SHIFT,
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VK_CONTROL or VK_MENU
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</table></center>
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<p> This table is the result of experimenting with popular ActiveX controls,
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ie. Internet Explorer and Microsoft Office applications, but for some
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controls it might require modification.
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<!-- eof -->
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<hr><p>
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This file is part of the <a href="index.html">Qt toolkit</a>.
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Copyright © 1995-2007
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<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>Qt 3.3.8</div>
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</table></div></address></body>
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</html>
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