main.cpp 范例文件

piechartdrilldown/main.cpp
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#include "drilldownchart.h" #include "drilldownslice.h" #include <QtWidgets/QApplication> #include <QtWidgets/QMainWindow> #include <QtCore/QTime> #include <QtCharts/QChartView> #include <QtCharts/QLegend> #include <QtCharts/QPieSeries> QT_CHARTS_USE_NAMESPACE int main(int argc, char *argv[]) { QApplication a(argc, argv); qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime())); QMainWindow window; DrilldownChart *chart = new DrilldownChart(); chart->setTheme(QChart::ChartThemeLight); chart->setAnimationOptions(QChart::AllAnimations); chart->legend()->setVisible(true); chart->legend()->setAlignment(Qt::AlignRight); QPieSeries *yearSeries = new QPieSeries(&window); yearSeries->setName("Sales by year - All"); const QStringList months = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; const QStringList names = { "Jane", "John", "Axel", "Mary", "Susan", "Bob" }; for (const QString &name : names) { QPieSeries *series = new QPieSeries(&window); series->setName("Sales by month - " + name); for (const QString &month : months) *series << new DrilldownSlice(qrand() % 1000, month, yearSeries); QObject::connect(series, &QPieSeries::clicked, chart, &DrilldownChart::handleSliceClicked); *yearSeries << new DrilldownSlice(series->sum(), name, series); } QObject::connect(yearSeries, &QPieSeries::clicked, chart, &DrilldownChart::handleSliceClicked); chart->changeSeries(yearSeries); QChartView *chartView = new QChartView(chart); chartView->setRenderHint(QPainter::Antialiasing); window.setCentralWidget(chartView); window.resize(800, 500); window.show(); return a.exec(); }