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

Qt Reference Documentation

- Qt 4.8
- ALL VERSIONS

- A
- A
- A
- Print

# flippablepad.cpp Example File

graphicsview/padnavigator/flippablepad.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 "flippablepad.h"

     #include <QtGui/QtGui>

     static QRectF boundsFromSize(const QSize &size)
     {
         return QRectF((-size.width() / 2.0) * 150, (-size.height() / 2.0) * 150,
                       size.width() * 150, size.height() * 150);
     }

     static QPointF posForLocation(int column, int row, const QSize &size)
     {
         return QPointF(column * 150, row * 150)
             - QPointF((size.width() - 1) * 75, (size.height() - 1) * 75);
     }

     FlippablePad::FlippablePad(const QSize &size, QGraphicsItem *parent)
         : RoundRectItem(boundsFromSize(size), QColor(226, 255, 92, 64), parent)
     {
         int numIcons = size.width() * size.height();
         QList<QPixmap> pixmaps;
         QDirIterator it(":/images", QStringList() << "*.png");
         while (it.hasNext() && pixmaps.size() < numIcons)
             pixmaps << it.next();

         const QRectF iconRect(-54, -54, 108, 108);
         const QColor iconColor(214, 240, 110, 128);
         iconGrid.resize(size.height());
         int n = 0;

         for (int y = 0; y < size.height(); ++y) {
             iconGrid[y].resize(size.width());
             for (int x = 0; x < size.width(); ++x) {
                 RoundRectItem *rect = new RoundRectItem(iconRect, iconColor, this);
                 rect->setZValue(1);
                 rect->setPos(posForLocation(x, y, size));
                 rect->setPixmap(pixmaps.at(n++ % pixmaps.size()));
                 iconGrid[y][x] = rect;
             }
         }
     }

     RoundRectItem *FlippablePad::iconAt(int column, int row) const
     {
         return iconGrid[row][column];
     }