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#ifndef DONUTBREAKDOWNCHART_H
30#define DONUTBREAKDOWNCHART_H
31
32#include <QtCharts/QChart>
33#include <QtCharts/QPieSeries>
34
35QT_CHARTS_USE_NAMESPACE
36
37class DonutBreakdownChart : public QChart
38{
39public:
40 DonutBreakdownChart(QGraphicsItem *parent = nullptr, Qt::WindowFlags wFlags = {});
41 void addBreakdownSeries(QPieSeries *series, QColor color);
42
43private:
44 void recalculateAngles();
45 void updateLegendMarkers();
46
47private:
48 QPieSeries *m_mainSeries;
49};
50
51#endif // DONUTBREAKDOWNCHART_H
52

source code of qtcharts/examples/charts/donutbreakdown/donutbreakdownchart.h