Qt Reference Documentation

roundrectitem.cpp Example File

graphicsview/padnavigator/roundrectitem.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.
 **   * 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 The Qt Company Ltd 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 "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();
 }