donutchart.cpp
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r0 | /**************************************************************************** | ||
** | ||||
** Copyright (C) 2016 The Qt Company Ltd. | ||||
** Contact: https://www.qt.io/licensing/ | ||||
** | ||||
** This file is part of the Qt Charts module of the Qt Toolkit. | ||||
** | ||||
** $QT_BEGIN_LICENSE:GPL$ | ||||
** Commercial License Usage | ||||
** Licensees holding valid commercial Qt licenses may use this file in | ||||
** accordance with the commercial license agreement provided with the | ||||
** Software or, alternatively, in accordance with the terms contained in | ||||
** a written agreement between you and The Qt Company. For licensing terms | ||||
** and conditions see https://www.qt.io/terms-conditions. For further | ||||
** information use the contact form at https://www.qt.io/contact-us. | ||||
** | ||||
** GNU General Public License Usage | ||||
** Alternatively, this file may be used under the terms of the GNU | ||||
** General Public License version 3 or (at your option) any later version | ||||
** approved by the KDE Free Qt Foundation. The licenses are as published by | ||||
** the Free Software Foundation and appearing in the file LICENSE.GPL3 | ||||
** included in the packaging of this file. Please review the following | ||||
** information to ensure the GNU General Public License requirements will | ||||
** be met: https://www.gnu.org/licenses/gpl-3.0.html. | ||||
** | ||||
** $QT_END_LICENSE$ | ||||
** | ||||
****************************************************************************/ | ||||
#include "charts.h" | ||||
#include <QtCharts/QChart> | ||||
#include <QtCharts/QPieSeries> | ||||
class DonutChart: public Chart | ||||
{ | ||||
public: | ||||
QString name() { return QObject::tr("DonutChart"); } | ||||
QString category() { return QObject::tr("PieSeries"); } | ||||
QString subCategory() { return QString::null; } | ||||
QChart *createChart(const DataTable &table) | ||||
{ | ||||
QChart *chart = new QChart(); | ||||
chart->setTitle("Donut chart"); | ||||
for (int i = 0, j = table.count(); i < table.count(); i++, j--) { | ||||
QPieSeries *series = new QPieSeries(chart); | ||||
foreach (Data data, table[i]) { | ||||
QPieSlice *slice = series->append(data.second, data.first.y()); | ||||
if (data == table[i].first()) | ||||
slice->setLabelVisible(); | ||||
} | ||||
series->setPieSize(j / (qreal) table.count()); | ||||
if (j > 1) | ||||
series->setHoleSize((j - 1) / (qreal) table.count() + 0.1); | ||||
series->setHorizontalPosition(0.5); | ||||
series->setVerticalPosition(0.5); | ||||
chart->addSeries(series); | ||||
} | ||||
return chart; | ||||
} | ||||
}; | ||||
DECLARE_CHART(DonutChart) | ||||