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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 */ |