src_gui_kernel_qevent.cpp

Enable keyboard shortcuts

++ // 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