Qt Reference Documentation

# flippablepad.cpp Example File

graphicsview/padnavigator/flippablepad.cpp

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     #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];
     }