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50
51#include "imageitem.h"
52
53//! [0]
54ImageItem::ImageItem(int id, const QPixmap &pixmap, QGraphicsItem *parent)
55 : QGraphicsPixmapItem(pixmap, parent)
56{
57 recordId = id;
58 setAcceptHoverEvents(true);
59
60 timeLine.setDuration(150);
61 timeLine.setFrameRange(startFrame: 0, endFrame: 150);
62
63 connect(sender: &timeLine, signal: &QTimeLine::frameChanged, receiver: this, slot: &ImageItem::setFrame);
64 connect(sender: &timeLine, signal: &QTimeLine::finished, receiver: this, slot: &ImageItem::updateItemPosition);
65
66 adjust();
67}
68//! [0]
69
70//! [1]
71void ImageItem::hoverEnterEvent(QGraphicsSceneHoverEvent * /*event*/)
72{
73 timeLine.setDirection(QTimeLine::Forward);
74
75 if (z != 1.0) {
76 z = 1.0;
77 updateItemPosition();
78 }
79
80 if (timeLine.state() == QTimeLine::NotRunning)
81 timeLine.start();
82}
83//! [1]
84
85//! [2]
86void ImageItem::hoverLeaveEvent(QGraphicsSceneHoverEvent * /*event*/)
87{
88 timeLine.setDirection(QTimeLine::Backward);
89 if (z != 0.0)
90 z = 0.0;
91
92 if (timeLine.state() == QTimeLine::NotRunning)
93 timeLine.start();
94}
95//! [2]
96
97//! [3]
98void ImageItem::setFrame(int frame)
99{
100 adjust();
101 QPointF center = boundingRect().center();
102
103 setTransform(matrix: QTransform::fromTranslate(dx: center.x(), dy: center.y()), combine: true);
104 setTransform(matrix: QTransform::fromScale(dx: 1 + frame / 330.0, dy: 1 + frame / 330.0), combine: true);
105 setTransform(matrix: QTransform::fromTranslate(dx: -center.x(), dy: -center.y()), combine: true);
106}
107//! [3]
108
109//! [4]
110void ImageItem::adjust()
111{
112 setTransform(matrix: QTransform::fromScale(dx: 120 / boundingRect().width(),
113 dy: 120 / boundingRect().height()));
114}
115//! [4]
116
117//! [5]
118int ImageItem::id() const
119{
120 return recordId;
121}
122//! [5]
123
124//! [6]
125void ImageItem::updateItemPosition()
126{
127 setZValue(z);
128}
129//! [6]
130
131
132

source code of qtbase/examples/sql/drilldown/imageitem.cpp