main.cpp 范例文件

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** This file is part of the Qt Charts module of the Qt Toolkit.
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#include <QtWidgets/QApplication>
#include <QtWidgets/QMainWindow>
#include <QtCharts/QChartView>
#include <QtCharts/QBarSeries>
#include <QtCharts/QBarSet>
#include <QtCharts/QLegend>
#include <QtCharts/QBarCategoryAxis>
#include <QtCharts/QStackedBarSeries>
QT_CHARTS_USE_NAMESPACE
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QBarSet *low = new QBarSet("Min");
    QBarSet *high = new QBarSet("Max");
    *low << -52 << -50 << -45.3 << -37.0 << -25.6 << -8.0
         << -6.0 << -11.8 << -19.7 << -32.8 << -43.0 << -48.0;
    *high << 11.9 << 12.8 << 18.5 << 26.5 << 32.0 << 34.8
          << 38.2 << 34.8 << 29.8 << 20.4 << 15.1 << 11.8;
    QStackedBarSeries *series = new QStackedBarSeries();
    series->append(low);
    series->append(high);
    QChart *chart = new QChart();
    chart->addSeries(series);
    chart->setTitle("Temperature records in celcius");
    chart->setAnimationOptions(QChart::SeriesAnimations);
    QStringList categories = {
        "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
    };
    QBarCategoryAxis *axis = new QBarCategoryAxis();
    axis->append(categories);
    axis->setTitleText("Month");
    chart->createDefaultAxes();
    chart->setAxisX(axis, series);
    chart->axisY(series)->setRange(-52, 52);
    chart->axisY(series)->setTitleText("Temperature [°C]");
    chart->legend()->setVisible(true);
    chart->legend()->setAlignment(Qt::AlignBottom);
    QChartView *chartView = new QChartView(chart);
    chartView->setRenderHint(QPainter::Antialiasing);
    QMainWindow window;
    window.setCentralWidget(chartView);
    window.resize(600, 300);
    window.show();
    return a.exec();
}