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