blob: c24e755e92e69b4d956d615559326ea888e6548b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QWheelEvent>
namespace src_gui_kernel_qevent {
class MyWidget //: public QWidget
{
void wheelEvent(QWheelEvent *event);
void scrollWithPixels(QPoint point);
void scrollWithDegrees(QPoint point);
};
//! [0]
void MyWidget::wheelEvent(QWheelEvent *event)
{
QPoint numPixels = event->pixelDelta();
QPoint numDegrees = event->angleDelta() / 8;
if (!numPixels.isNull()) {
scrollWithPixels(numPixels);
} else if (!numDegrees.isNull()) {
QPoint numSteps = numDegrees / 15;
scrollWithDegrees(numSteps);
}
event->accept();
}
//! [0]
} // src_gui_kernel_qevent
|