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50
51#include "flippablepad.h"
52
53#include <QDirIterator>
54
55//! [0]
56static QRectF boundsFromSize(const QSize &size)
57{
58 return QRectF((-size.width() / 2.0) * 150, (-size.height() / 2.0) * 150,
59 size.width() * 150, size.height() * 150);
60}
61//! [0]
62
63//! [1]
64static QPointF posForLocation(int column, int row, const QSize &size)
65{
66 return QPointF(column * 150, row * 150)
67 - QPointF((size.width() - 1) * 75, (size.height() - 1) * 75);
68}
69//! [1]
70
71//! [2]
72FlippablePad::FlippablePad(const QSize &size, QGraphicsItem *parent)
73 : RoundRectItem(boundsFromSize(size), QColor(226, 255, 92, 64), parent)
74{
75//! [2]
76//! [3]
77 int numIcons = size.width() * size.height();
78 QVector<QPixmap> pixmaps;
79 QDirIterator it(":/images", {"*.png"});
80 while (it.hasNext() && pixmaps.size() < numIcons)
81 pixmaps << it.next();
82//! [3]
83
84//! [4]
85 const QRectF iconRect(-54, -54, 108, 108);
86 const QColor iconColor(214, 240, 110, 128);
87 iconGrid.resize(asize: size.height());
88 int n = 0;
89
90 for (int y = 0; y < size.height(); ++y) {
91 iconGrid[y].resize(asize: size.width());
92 for (int x = 0; x < size.width(); ++x) {
93 RoundRectItem *rect = new RoundRectItem(iconRect, iconColor, this);
94 rect->setZValue(1);
95 rect->setPos(posForLocation(column: x, row: y, size));
96 rect->setPixmap(pixmaps.at(i: n++ % pixmaps.size()));
97 iconGrid[y][x] = rect;
98 }
99 }
100}
101//! [4]
102
103//! [5]
104RoundRectItem *FlippablePad::iconAt(int column, int row) const
105{
106 return iconGrid[row][column];
107}
108//! [5]
109

source code of qtbase/examples/widgets/graphicsview/padnavigator/flippablepad.cpp