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Diffstat (limited to 'examples/charts/nesteddonuts/widget.cpp')
-rw-r--r-- | examples/charts/nesteddonuts/widget.cpp | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/examples/charts/nesteddonuts/widget.cpp b/examples/charts/nesteddonuts/widget.cpp new file mode 100644 index 00000000..e11c4c7c --- /dev/null +++ b/examples/charts/nesteddonuts/widget.cpp @@ -0,0 +1,128 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc +** All rights reserved. +** For any questions to Digia, please use contact form at http://qt.digia.com +** +** This file is part of the Qt Enterprise Charts Add-on. +** +** $QT_BEGIN_LICENSE$ +** Licensees holding valid Qt Enterprise licenses may use this file in +** accordance with the Qt Enterprise License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. +** +** If you have questions regarding the use of this file, please use +** contact form at http://qt.digia.com +** $QT_END_LICENSE$ +** +****************************************************************************/ +#include "widget.h" +#include <QChartView> +#include <QChart> +#include <QLegend> +#include <QPieSeries> +#include <QPieSlice> +#include <QTime> +#include <QGridLayout> +#include <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] |