main.cpp Example File

stackedbarchartdrilldown/main.cpp
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#include <QtWidgets/QApplication> #include <QtWidgets/QMainWindow> #include <QtCore/QRandomGenerator> #include <QtCharts/QChartView> #include <QtCharts/QBarSet> #include <QtCharts/QLegend> #include "drilldownseries.h" #include "drilldownchart.h" QT_CHARTS_USE_NAMESPACE int main(int argc, char *argv[]) { QApplication a(argc, argv); QMainWindow window; DrilldownChart *drilldownChart = new DrilldownChart(); drilldownChart->setAnimationOptions(QChart::SeriesAnimations); // Define categories const QStringList months = { "May", "Jun", "Jul", "Aug", "Sep" }; const QStringList weeks = { "week 1", "week 2", "week 3", "week 4" }; const QStringList plants = { "Habanero", "Lemon Drop", "Starfish", "Aji Amarillo" }; // Create drilldown structure DrilldownBarSeries *seasonSeries = new DrilldownBarSeries(months, 320, drilldownChart); seasonSeries->setName("Crop by month - Season"); // Each month in season series has drilldown series for weekly data for (int month = 0; month < months.count(); month++) { // Create drilldown series for every week DrilldownBarSeries *weeklySeries = new DrilldownBarSeries(weeks, 80, drilldownChart); seasonSeries->mapDrilldownSeries(month, weeklySeries); // Drilling down from weekly data brings us back to season data. for (int week = 0; week < weeks.count(); week++) { weeklySeries->mapDrilldownSeries(week, seasonSeries); weeklySeries->setName(QString("Crop by week - " + months.at(month))); } // Use clicked signal to implement drilldown QObject::connect(weeklySeries, &DrilldownBarSeries::clicked, drilldownChart, &DrilldownChart::handleClicked); } // Enable drilldown from season series using clicked signal QObject::connect(seasonSeries, &DrilldownBarSeries::clicked, drilldownChart, &DrilldownChart::handleClicked); // Fill monthly and weekly series with data for (const QString &plant : plants) { QBarSet *monthlyCrop = new QBarSet(plant); for (int month = 0; month < months.count(); month++) { QBarSet *weeklyCrop = new QBarSet(plant); for (int week = 0; week < weeks.count(); week++) *weeklyCrop << QRandomGenerator::global()->bounded(20); // Get the drilldown series from season series and add crop to it. seasonSeries->drilldownSeries(month)->append(weeklyCrop); *monthlyCrop << weeklyCrop->sum(); } seasonSeries->append(monthlyCrop); } // Show season series in initial view drilldownChart->changeSeries(seasonSeries); drilldownChart->setTitle(seasonSeries->name()); drilldownChart->axes(Qt::Horizontal).first()->setGridLineVisible(false); drilldownChart->legend()->setVisible(true); drilldownChart->legend()->setAlignment(Qt::AlignBottom); QChartView *chartView = new QChartView(drilldownChart); window.setCentralWidget(chartView); window.resize(480, 300); window.show(); return a.exec(); }

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