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 "chart.h"
33
34ChartView::ChartView(Chart *chart, QWidget *parent) :
35 QChartView(chart, parent)
36{
37 m_chart = chart;
38}
39
40void ChartView::mousePressEvent(QMouseEvent *event)
41{
42 m_mousePos = event->pos();
43 QChartView::mousePressEvent(event);
44}
45
46void ChartView::mouseMoveEvent(QMouseEvent *event)
47{
48 m_chart->handlePointMove(point: event->pos());
49 QChartView::mouseMoveEvent(event);
50}
51
52void ChartView::mouseReleaseEvent(QMouseEvent *event)
53{
54 if (event->pos() != m_mousePos) {
55 m_chart->handlePointMove(point: event->pos());
56 m_chart->setPointClicked(false);
57 }
58 QChartView::mouseReleaseEvent(event);
59}
60

source code of qtcharts/examples/charts/chartinteractions/chartview.cpp