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| 3 | ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | /*!
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| 43 | \page qaxserver-demo-hierarchy.html
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| 44 | \title Qt Widget Hierarchy
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| 45 |
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| 46 | \input examples/activeqt/hierarchy-demo.qdocinc
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| 47 | */
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| 48 |
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| 49 | /*!
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| 50 | \example activeqt/hierarchy
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| 51 | \title Hierarchy Example (ActiveQt)
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| 52 |
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| 53 | The Hierarchy example is shows how to write an in-process ActiveX
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| 54 | control. The control is a QWidget subclass with child widgets
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| 55 | that are accessible as sub-types.
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| 56 |
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| 57 | \snippet examples/activeqt/hierarchy/objects.h 0
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| 58 | The \c QParentWidget class provides slots to create a widget
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| 59 | with a name, and to return a pointer to a named widget. The class
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| 60 | declaration uses \c Q_CLASSINFO() to provide the COM identifiers for
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| 61 | this class.
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| 62 |
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| 63 | \snippet examples/activeqt/hierarchy/objects.cpp 0
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| 64 | The constructor of QParentWidget creates a vertical box layout.
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| 65 | New child widgets are automatically added to the layout.
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| 66 |
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| 67 | \snippet examples/activeqt/hierarchy/objects.cpp 1
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| 68 | The \c createSubWidget slot creates a new \c QSubWidget with
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| 69 | the name provided in the parameter, and sets the label to that
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| 70 | name. The widget is also shown explicitly.
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| 71 |
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| 72 | \snippet examples/activeqt/hierarchy/objects.cpp 2
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| 73 | The \c subWidget slot uses the \c QObject::child() function and
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| 74 | returns the first child of type \c QSubWidget that has the requested
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| 75 | name.
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| 76 |
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| 77 | \snippet examples/activeqt/hierarchy/objects.h 1
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| 78 | The \c QSubWidget class has a single string-property \c label,
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| 79 | and implements the paintEvent to draw the label. The class uses
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| 80 | again \c Q_CLASSINFO to provide the COM identifiers, and also sets
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| 81 | the \e ToSuperClass attribute to \e QSubWidget, to ensure that only
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| 82 | no slots of any superclasses (i.e. QWidget) are exposed.
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| 83 |
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| 84 | \snippet examples/activeqt/hierarchy/objects.cpp 3
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| 85 | \snippet examples/activeqt/hierarchy/objects.cpp 4
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| 86 | The implementation of the QSubWidget class is self-explanatory.
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| 87 |
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| 88 | \snippet examples/activeqt/hierarchy/main.cpp 0
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| 89 | The classes are then exported using a QAxFactory. \c QParentWidget is
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| 90 | exported as a full class (which can be created ), while \c QSubWidget is
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| 91 | only exported as a type, which can only be created indirectly through
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| 92 | APIs of \c QParentWidget.
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| 93 |
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| 94 | To build the example you must first build the QAxServer library.
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| 95 | Then run qmake and your make tool in \c examples/activeqt/hierarchy.
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| 96 |
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| 97 | The \l{qaxserver-demo-hierarchy.html}{demonstration} requires
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| 98 | your WebBrowser to support ActiveX controls, and scripting to be
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| 99 | enabled.
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| 100 |
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| 101 | \snippet examples/activeqt/hierarchy-demo.qdocinc 0
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| 102 | */
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