main.cpp
111 lines
| 3.0 KiB
| text/x-c
|
CppLexer
Jani Honkonen
|
r406 | #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; | ||||
|
Jani Honkonen
|
r408 | label += " " + QString::number(this->value())+ "e ("; | ||
|
Jani Honkonen
|
r406 | 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) | ||||
| { | ||||
| 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(drilldownChart); | ||||
| yearSeries->setTitle("Sales by year - All"); | ||||
| QList<QString> months; | ||||
| months << "Jan" << "Feb" << "Mar" << "Apr" << "May" << "Jun" << "Jul" << "Aug" << "Sep" << "Oct" << "Nov" << "Dec"; | ||||
|
Jani Honkonen
|
r408 | QList<QString> names; | ||
| names << "Jane" << "John" << "Axel" << "Mary" << "Samantha" << "Bob"; | ||||
| foreach (QString name, names) { | ||||
| QPieSeries* series = new QPieSeries(drilldownChart); | ||||
| 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); | ||||
| } | ||||
|
Jani Honkonen
|
r406 | |||
| QObject::connect(yearSeries, SIGNAL(clicked(QPieSlice*)), drilldownChart, SLOT(handleSliceClicked(QPieSlice*))); | ||||
| drilldownChart->changeSeries(yearSeries); | ||||
| window.setCentralWidget(drilldownChart); | ||||
| window.resize(600, 600); | ||||
| window.show(); | ||||
| return a.exec(); | ||||
| } | ||||
| #include "main.moc" | ||||