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    41 

    42 #ifndef QACTIVEXPLUGINOBJECT_H

    43 #define QACTIVEXPLUGINOBJECT_H

    44 

    45 #include <QtCore/QPointer>

    46 #include <QtCore/QMap>

    47 #include <QtGui/QWidget>

    48 #include <QtGui/QPixmap>

    49 

    50 QT_BEGIN_NAMESPACE

    51 

    52 class QAxWidget;

    53 

    54 /* QDesignerAxWidget aggregates QAxWidget to keep it out of the event loop while applying

    55  * properties directly.

    56  * Thus, it is possible to set property values in designer that are out of range

    57  * for the control, which might cause it to throw exceptions.

    58  *

    59  * QDesignerAxWidget is the base class following the internal naming

    60  * conventions that makes the control property visible to the introspection interface.

    61  *

    62  * The trick to aggregate a QAxWidget is to overwrite the metaObject() function

    63  * generated by moc to return the QMetaObject of QAxWidget. This is what QDesignerAxPluginWidget does. */

    64 

    65 class QDesignerAxWidget : public QWidget

    66 {

    67     Q_OBJECT

    68     Q_PROPERTY(QString control READ control WRITE setControl RESET resetControl DESIGNABLE true)

    69     Q_DISABLE_COPY(QDesignerAxWidget)

    70 

    71 protected:

    72     explicit QDesignerAxWidget(QWidget *parent);

    73 

    74 public:

    75     virtual ~QDesignerAxWidget();

    76 

    77     bool loadControl(const QString &clsid);

    78 

    79     void resetControl();

    80     void setControl(const QString &clsid);

    81     QString control() const;

    82 

    83     QSize sizeHint() const;

    84     QSize minimumSizeHint() const;

    85 

    86     bool loaded() { return (m_axobject != 0); }

    87 

    88     static QPixmap widgetIcon();

    89 

    90     enum { DrawIndicator = 0x1, DrawFrame = 0x2, DrawControl = 0x4 };

    91 

    92     unsigned drawFlags() const { return m_drawFlags; }

    93     void setDrawFlags(unsigned f)  { m_drawFlags = f; }

    94 

    95 protected:

    96     void paintEvent(QPaintEvent *event);

    97     QAxWidget *axobject() const { return m_axobject; }

    98 

    99 private:

   100     const QSize m_defaultSize;

   101     unsigned m_drawFlags;

   102     QAxWidget *m_axobject;

   103     QPixmap m_axImage;

   104 };

   105 

   106 class QDesignerAxPluginWidget : public QDesignerAxWidget

   107 {

   108    // No Q_OBJECT here! - meta functionality is overriden

   109 public:

   110     explicit QDesignerAxPluginWidget(QWidget *parent);

   111     virtual ~QDesignerAxPluginWidget();

   112 

   113     virtual const QMetaObject *metaObject() const;

   114     virtual int qt_metacall(QMetaObject::Call, int, void **);

   115 

   116 private:

   117     QMap<int, bool> m_propValues;

   118 };

   119 

   120 #if defined Q_CC_MSVC && _MSC_VER < 1300

   121 template <> inline QDesignerAxWidget *qobject_cast_helper<QDesignerAxWidget*>(QObject *o,  QDesignerAxWidget*)

   122 #else

   123 template <> inline QDesignerAxWidget *qobject_cast<QDesignerAxWidget*>(QObject *o)

   124 #endif

   125 {

   126     if (!o)

   127         return 0;

   128 

   129     // Unloaded state

   130     if (strcmp(o->metaObject()->className(), "QDesignerAxWidget") == 0)

   131         return static_cast<QDesignerAxPluginWidget*>(o);

   132 

   133     // Loaded state with fake meta object

   134     if (strcmp(o->metaObject()->className(), "QAxWidget") == 0)

   135         return static_cast<QDesignerAxPluginWidget*>(o);

   136 

   137     return 0;

   138 }

   139 

   140 QT_END_NAMESPACE

   141 

   142 #endif // ACTIVEQT_EXTRAINFO_H