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#include <QtGui/QApplication>
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#include <QMainWindow>
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#include <qchartglobal.h>
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#include <qchartview.h>
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#include <qpieseries.h>
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#include <qpieslice.h>
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#include <QTime>
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QTCOMMERCIALCHART_USE_NAMESPACE
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class DrilldownSlice : public QPieSlice
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{
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Q_OBJECT
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public:
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DrilldownSlice(qreal value, QString prefix, QSeries* drilldownSeries)
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:m_drilldownSeries(drilldownSeries),
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m_prefix(prefix)
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{
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setValue(value);
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setLabelVisible(true);
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updateLabel();
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connect(this, SIGNAL(changed()), this, SLOT(updateLabel()));
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}
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QSeries* drilldownSeries() const { return m_drilldownSeries; }
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public Q_SLOTS:
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void updateLabel()
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{
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QString label = m_prefix;
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label += " " + QString::number(this->value())+ "e (";
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label += QString::number(this->percentage()*100, 'f', 1) + "%)";
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setLabel(label);
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}
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private:
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QSeries* m_drilldownSeries;
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QString m_prefix;
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};
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class DrilldownChart : public QChart
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{
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Q_OBJECT
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public:
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explicit DrilldownChart(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0):QChart(parent, wFlags), m_currentSeries(0) {}
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void changeSeries(QSeries* series)
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{
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// NOTE: if the series is owned by the chart it will be deleted
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// here the "window" owns the series...
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if (m_currentSeries)
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removeSeries(m_currentSeries);
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m_currentSeries = series;
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addSeries(series);
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setTitle(series->name());
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}
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public Q_SLOTS:
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void handleSliceClicked(QPieSlice* slice)
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{
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DrilldownSlice* drilldownSlice = static_cast<DrilldownSlice*>(slice);
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changeSeries(drilldownSlice->drilldownSeries());
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}
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private:
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QSeries* m_currentSeries;
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};
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int main(int argc, char *argv[])
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{
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QApplication a(argc, argv);
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qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
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QMainWindow window;
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DrilldownChart* drilldownChart = new DrilldownChart();
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drilldownChart->setTheme(QChart::ChartThemeLight);
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drilldownChart->setAnimationOptions(QChart::AllAnimations);
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QPieSeries* yearSeries = new QPieSeries(&window);
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yearSeries->setName("Sales by year - All");
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QList<QString> months;
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months << "Jan" << "Feb" << "Mar" << "Apr" << "May" << "Jun" << "Jul" << "Aug" << "Sep" << "Oct" << "Nov" << "Dec";
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QList<QString> names;
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names << "Jane" << "John" << "Axel" << "Mary" << "Samantha" << "Bob";
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foreach (QString name, names) {
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QPieSeries* series = new QPieSeries(&window);
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series->setName("Sales by month - " + name);
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foreach (QString month, months)
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*series << new DrilldownSlice(qrand() % 1000, month, yearSeries);
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QObject::connect(series, SIGNAL(clicked(QPieSlice*, Qt::MouseButtons)), drilldownChart, SLOT(handleSliceClicked(QPieSlice*)));
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*yearSeries << new DrilldownSlice(series->total(), name, series);
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}
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QObject::connect(yearSeries, SIGNAL(clicked(QPieSlice*, Qt::MouseButtons)), drilldownChart, SLOT(handleSliceClicked(QPieSlice*)));
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drilldownChart->changeSeries(yearSeries);
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QChartView* chartView = new QChartView(drilldownChart);
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chartView->setRenderHint(QPainter::Antialiasing);
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window.setCentralWidget(chartView);
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window.resize(800, 600);
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window.show();
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return a.exec();
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}
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#include "main.moc"
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