qwidgets.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
 ** 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.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
 **     of its contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #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);