Qt 5.6 | Qt Widgets | Pad Navigator Example | flippablepad.cpp Example File

Qt 5.6.2 Reference Documentation

# flippablepad.cpp Example File

graphicsview/padnavigator/flippablepad.cpp

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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];
      }