flippablepad.cpp Example File

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  #include "flippablepad.h"

  #include <QDirIterator>

  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];
  }