Qt 4.8: customproxy.h Example File (demos/embeddeddialogs/customproxy.h)

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# customproxy.h Example File

demos/embeddeddialogs/customproxy.h

     /****************************************************************************
     **
     ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** Commercial License Usage
     ** Licensees holding valid commercial Qt licenses may use this file in
     ** accordance with the commercial license agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
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     ** use the contact form at http://qt.digia.com/contact-us.
     **
     ** GNU Lesser General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.LGPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU Lesser General Public License version 2.1 requirements
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     ** rights.  These rights are described in the Digia Qt LGPL Exception
     ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
     **
     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.GPL included in the
     ** packaging of this file.  Please review the following information to
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     #ifndef CUSTOMPROXY_H
     #define CUSTOMPROXY_H

     #include <QtCore/qtimeline.h>
     #include <QtGui/qgraphicsproxywidget.h>

     class CustomProxy : public QGraphicsProxyWidget
     {
         Q_OBJECT
     public:
         CustomProxy(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0);

         QRectF boundingRect() const;
         void paintWindowFrame(QPainter *painter, const QStyleOptionGraphicsItem *option,
                               QWidget *widget);

     protected:
         void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
         void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
         bool sceneEventFilter(QGraphicsItem *watched, QEvent *event);
         QVariant itemChange(GraphicsItemChange change, const QVariant &value);

     private slots:
         void updateStep(qreal step);
         void stateChanged(QTimeLine::State);
         void zoomIn();
         void zoomOut();

     private:
         QTimeLine *timeLine;
         bool popupShown;
         QGraphicsItem *currentPopup;
     };

     #endif