Qt 4.8: roundrectitem.cpp Example File (graphicsview/padnavigator/roundrectitem.cpp)

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# roundrectitem.cpp Example File

graphicsview/padnavigator/roundrectitem.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2012 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,
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     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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     ****************************************************************************/

     #include "roundrectitem.h"

     #include <QtGui/QtGui>

     RoundRectItem::RoundRectItem(const QRectF &bounds, const QColor &color,
                                  QGraphicsItem *parent)
         : QGraphicsObject(parent), fillRect(false), bounds(bounds)
     {
         gradient.setStart(bounds.topLeft());
         gradient.setFinalStop(bounds.bottomRight());
         gradient.setColorAt(0, color);
         gradient.setColorAt(1, color.dark(200));
         setCacheMode(ItemCoordinateCache);
     }

     QPixmap RoundRectItem::pixmap() const
     {
         return pix;
     }
     void RoundRectItem::setPixmap(const QPixmap &pixmap)
     {
         pix = pixmap;
         update();
     }

     QRectF RoundRectItem::boundingRect() const
     {
         return bounds.adjusted(0, 0, 2, 2);
     }

     void RoundRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                               QWidget *widget)
     {
         Q_UNUSED(option);
         Q_UNUSED(widget);
         painter->setPen(Qt::NoPen);
         painter->setBrush(QColor(0, 0, 0, 64));
         painter->drawRoundRect(bounds.translated(2, 2));
         if (fillRect)
             painter->setBrush(QApplication::palette().brush(QPalette::Window));
         else
             painter->setBrush(gradient);
         painter->setPen(QPen(Qt::black, 1));
         painter->drawRoundRect(bounds);
         if (!pix.isNull()) {
             painter->scale(1.95, 1.95);
             painter->drawPixmap(-pix.width() / 2, -pix.height() / 2, pix);
         }
     }

     bool RoundRectItem::fill() const
     {
         return fillRect;
     }
     void RoundRectItem::setFill(bool fill)
     {
         fillRect = fill;
         update();
     }