1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the Qt Charts module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:GPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU
19** General Public License version 3 or (at your option) any later version
20** approved by the KDE Free Qt Foundation. The licenses are as published by
21** the Free Software Foundation and appearing in the file LICENSE.GPL3
22** included in the packaging of this file. Please review the following
23** information to ensure the GNU General Public License requirements will
24** be met: https://www.gnu.org/licenses/gpl-3.0.html.
25**
26** $QT_END_LICENSE$
27**
28****************************************************************************/
29
30#include "chartview.h"
31#include <QtGui/QMouseEvent>
32#include <QtCore/QDebug>
33#include <QtCharts/QAbstractAxis>
34
35QT_CHARTS_USE_NAMESPACE
36
37ChartView::ChartView(QWidget *parent) :
38 QChartView(parent)
39{
40}
41
42void ChartView::keyPressEvent(QKeyEvent *event)
43{
44 switch (event->key()) {
45 case Qt::Key_Plus:
46 chart()->zoomIn();
47 break;
48 case Qt::Key_Minus:
49 chart()->zoomOut();
50 break;
51 case Qt::Key_Left:
52 chart()->scroll(dx: -1.0, dy: 0);
53 break;
54 case Qt::Key_Right:
55 chart()->scroll(dx: 1.0, dy: 0);
56 break;
57 case Qt::Key_Up:
58 chart()->scroll(dx: 0, dy: 1.0);
59 break;
60 case Qt::Key_Down:
61 chart()->scroll(dx: 0, dy: -1.0);
62 break;
63 default:
64 QGraphicsView::keyPressEvent(event);
65 break;
66 }
67}
68

source code of qtcharts/tests/manual/polarcharttest/chartview.cpp