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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd
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** All rights reserved.
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** For any questions to The Qt Company, please use contact form at http://qt.io
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**
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** This file is part of the Qt Charts module.
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**
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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** agreement between you and The Qt Company.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.io
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**
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****************************************************************************/
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#include "widget.h"
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#include <QtCharts/QChartView>
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#include <QtCharts/QChart>
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#include <QtCharts/QLegend>
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#include <QtCharts/QPieSeries>
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#include <QtCharts/QPieSlice>
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#include <QtCore/QTime>
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#include <QtWidgets/QGridLayout>
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#include <QtCore/QTimer>
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QT_CHARTS_USE_NAMESPACE
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Widget::Widget(QWidget *parent)
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: QWidget(parent)
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{
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setMinimumSize(800, 600);
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qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
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//! [1]
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QChartView *chartView = new QChartView;
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chartView->setRenderHint(QPainter::Antialiasing);
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QChart *chart = chartView->chart();
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chart->legend()->setVisible(false);
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chart->setTitle("Nested donuts demo");
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chart->setAnimationOptions(QChart::AllAnimations);
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//! [1]
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//! [2]
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qreal minSize = 0.1;
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qreal maxSize = 0.9;
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int donutCount = 5;
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//! [2]
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//! [3]
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for (int i = 0; i < donutCount; i++) {
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QPieSeries *donut = new QPieSeries;
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int sliceCount = 3 + qrand() % 3;
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for (int j = 0; j < sliceCount; j++) {
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qreal value = 100 + qrand() % 100;
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QPieSlice *slice = new QPieSlice(QString("%1").arg(value), value);
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slice->setLabelVisible(true);
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slice->setLabelColor(Qt::white);
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slice->setLabelPosition(QPieSlice::LabelInsideTangential);
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connect(slice, SIGNAL(hovered(bool)), this, SLOT(explodeSlice(bool)));
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donut->append(slice);
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donut->setHoleSize(minSize + i * (maxSize - minSize) / donutCount);
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donut->setPieSize(minSize + (i + 1) * (maxSize - minSize) / donutCount);
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}
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m_donuts.append(donut);
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chartView->chart()->addSeries(donut);
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}
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//! [3]
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// create main layout
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//! [4]
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QGridLayout *mainLayout = new QGridLayout;
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mainLayout->addWidget(chartView, 1, 1);
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setLayout(mainLayout);
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//! [4]
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//! [5]
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updateTimer = new QTimer(this);
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connect(updateTimer, SIGNAL(timeout()), this, SLOT(updateRotation()));
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updateTimer->start(1250);
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//! [5]
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}
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Widget::~Widget()
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{
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}
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//! [6]
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void Widget::updateRotation()
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{
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for (int i = 0; i < m_donuts.count(); i++) {
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QPieSeries *donut = m_donuts.at(i);
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qreal phaseShift = -50 + qrand() % 100;
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donut->setPieStartAngle(donut->pieStartAngle() + phaseShift);
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donut->setPieEndAngle(donut->pieEndAngle() + phaseShift);
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}
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}
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//! [6]
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//! [7]
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void Widget::explodeSlice(bool exploded)
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{
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QPieSlice *slice = qobject_cast<QPieSlice *>(sender());
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if (exploded) {
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updateTimer->stop();
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qreal sliceStartAngle = slice->startAngle();
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qreal sliceEndAngle = slice->startAngle() + slice->angleSpan();
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QPieSeries *donut = slice->series();
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qreal seriesIndex = m_donuts.indexOf(donut);
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for (int i = seriesIndex + 1; i < m_donuts.count(); i++) {
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m_donuts.at(i)->setPieStartAngle(sliceEndAngle);
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m_donuts.at(i)->setPieEndAngle(360 + sliceStartAngle);
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}
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} else {
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for (int i = 0; i < m_donuts.count(); i++) {
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m_donuts.at(i)->setPieStartAngle(0);
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m_donuts.at(i)->setPieEndAngle(360);
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}
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updateTimer->start();
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}
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slice->setExploded(exploded);
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}
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//! [7]
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