- Qt 5.5
- Qt Widgets
- Pad Navigator Example
- flippablepad.cpp Example File
- Qt 5.5.1 Reference Documentation

# 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.
    **
    ** $QT_BEGIN_LICENSE:BSD$
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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];
    }