Qt 4.8: qwidgets.cpp Example File (declarative/cppextensions/qwidgets/qwidgets.cpp)

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# qwidgets.cpp Example File

declarative/cppextensions/qwidgets/qwidgets.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
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     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
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     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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     **
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     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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     #include <QtDeclarative/QDeclarativeExtensionPlugin>
     #include <QtDeclarative/qdeclarative.h>
     #include <QtGui/QGraphicsProxyWidget>
     #include <QtGui/QPushButton>
     #include <QDebug>

     class MyPushButton : public QGraphicsProxyWidget
     {
         Q_OBJECT
         Q_PROPERTY(QString text READ text WRITE setText NOTIFY textChanged)

     public:
         MyPushButton(QGraphicsItem* parent = 0)
             : QGraphicsProxyWidget(parent)
         {
             widget = new QPushButton("MyPushButton");
             widget->setAttribute(Qt::WA_NoSystemBackground);
             setWidget(widget);

             QObject::connect(widget, SIGNAL(clicked(bool)), this, SIGNAL(clicked(bool)));
         }

         QString text() const
         {
             return widget->text();
         }

         void setText(const QString& text)
         {
             if (text != widget->text()) {
                 widget->setText(text);
                 emit textChanged();
             }
         }

     Q_SIGNALS:
         void clicked(bool);
         void textChanged();

     private:
         QPushButton *widget;
     };

     class QWidgetsPlugin : public QDeclarativeExtensionPlugin
     {
         Q_OBJECT
     public:
         void registerTypes(const char *uri)
         {
             qmlRegisterType<MyPushButton>(uri, 1, 0, "MyPushButton");
         }
     };

     #include "qwidgets.moc"

     Q_EXPORT_PLUGIN2(qmlqwidgetsplugin, QWidgetsPlugin);