|
|
/****************************************************************************
|
|
|
**
|
|
|
** 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 "widget.h"
|
|
|
#include <QtCharts/QChartView>
|
|
|
#include <QtCharts/QChart>
|
|
|
#include <QtCharts/QLegend>
|
|
|
#include <QtCharts/QPieSeries>
|
|
|
#include <QtCharts/QPieSlice>
|
|
|
#include <QtCore/QTime>
|
|
|
#include <QtWidgets/QGridLayout>
|
|
|
#include <QtCore/QTimer>
|
|
|
|
|
|
QT_CHARTS_USE_NAMESPACE
|
|
|
|
|
|
Widget::Widget(QWidget *parent)
|
|
|
: QWidget(parent)
|
|
|
{
|
|
|
setMinimumSize(800, 600);
|
|
|
qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
|
|
|
|
|
|
//! [1]
|
|
|
QChartView *chartView = new QChartView;
|
|
|
chartView->setRenderHint(QPainter::Antialiasing);
|
|
|
QChart *chart = chartView->chart();
|
|
|
chart->legend()->setVisible(false);
|
|
|
chart->setTitle("Nested donuts demo");
|
|
|
chart->setAnimationOptions(QChart::AllAnimations);
|
|
|
//! [1]
|
|
|
|
|
|
//! [2]
|
|
|
qreal minSize = 0.1;
|
|
|
qreal maxSize = 0.9;
|
|
|
int donutCount = 5;
|
|
|
//! [2]
|
|
|
|
|
|
//! [3]
|
|
|
for (int i = 0; i < donutCount; i++) {
|
|
|
QPieSeries *donut = new QPieSeries;
|
|
|
int sliceCount = 3 + qrand() % 3;
|
|
|
for (int j = 0; j < sliceCount; j++) {
|
|
|
qreal value = 100 + qrand() % 100;
|
|
|
QPieSlice *slice = new QPieSlice(QString("%1").arg(value), value);
|
|
|
slice->setLabelVisible(true);
|
|
|
slice->setLabelColor(Qt::white);
|
|
|
slice->setLabelPosition(QPieSlice::LabelInsideTangential);
|
|
|
connect(slice, SIGNAL(hovered(bool)), this, SLOT(explodeSlice(bool)));
|
|
|
donut->append(slice);
|
|
|
donut->setHoleSize(minSize + i * (maxSize - minSize) / donutCount);
|
|
|
donut->setPieSize(minSize + (i + 1) * (maxSize - minSize) / donutCount);
|
|
|
}
|
|
|
m_donuts.append(donut);
|
|
|
chartView->chart()->addSeries(donut);
|
|
|
}
|
|
|
//! [3]
|
|
|
|
|
|
// create main layout
|
|
|
//! [4]
|
|
|
QGridLayout *mainLayout = new QGridLayout;
|
|
|
mainLayout->addWidget(chartView, 1, 1);
|
|
|
setLayout(mainLayout);
|
|
|
//! [4]
|
|
|
|
|
|
//! [5]
|
|
|
updateTimer = new QTimer(this);
|
|
|
connect(updateTimer, SIGNAL(timeout()), this, SLOT(updateRotation()));
|
|
|
updateTimer->start(1250);
|
|
|
//! [5]
|
|
|
}
|
|
|
|
|
|
Widget::~Widget()
|
|
|
{
|
|
|
|
|
|
}
|
|
|
|
|
|
//! [6]
|
|
|
void Widget::updateRotation()
|
|
|
{
|
|
|
for (int i = 0; i < m_donuts.count(); i++) {
|
|
|
QPieSeries *donut = m_donuts.at(i);
|
|
|
qreal phaseShift = -50 + qrand() % 100;
|
|
|
donut->setPieStartAngle(donut->pieStartAngle() + phaseShift);
|
|
|
donut->setPieEndAngle(donut->pieEndAngle() + phaseShift);
|
|
|
}
|
|
|
}
|
|
|
//! [6]
|
|
|
|
|
|
//! [7]
|
|
|
void Widget::explodeSlice(bool exploded)
|
|
|
{
|
|
|
QPieSlice *slice = qobject_cast<QPieSlice *>(sender());
|
|
|
if (exploded) {
|
|
|
updateTimer->stop();
|
|
|
qreal sliceStartAngle = slice->startAngle();
|
|
|
qreal sliceEndAngle = slice->startAngle() + slice->angleSpan();
|
|
|
|
|
|
QPieSeries *donut = slice->series();
|
|
|
qreal seriesIndex = m_donuts.indexOf(donut);
|
|
|
for (int i = seriesIndex + 1; i < m_donuts.count(); i++) {
|
|
|
m_donuts.at(i)->setPieStartAngle(sliceEndAngle);
|
|
|
m_donuts.at(i)->setPieEndAngle(360 + sliceStartAngle);
|
|
|
}
|
|
|
} else {
|
|
|
for (int i = 0; i < m_donuts.count(); i++) {
|
|
|
m_donuts.at(i)->setPieStartAngle(0);
|
|
|
m_donuts.at(i)->setPieEndAngle(360);
|
|
|
}
|
|
|
updateTimer->start();
|
|
|
}
|
|
|
slice->setExploded(exploded);
|
|
|
}
|
|
|
//! [7]
|
|
|
|
