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QLineSeries和 QBarSeries的用法

 1 year ago
source link: https://blog.51cto.com/u_15515702/5982134
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QLineSeries和 QBarSeries的用法

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#include <QtWidgets/QApplication>
#include <QtWidgets/QMainWindow>
#include <QtCharts/QChartView>
#include <QtCharts/QBarSeries>
#include <QtCharts/QBarSet>
#include <QtCharts/QLineSeries>
#include <QtCharts/QLegend>
#include <QtCharts/QBarCategoryAxis>
#include <QtCharts/QValueAxis>

QT_CHARTS_USE_NAMESPACE

int main(int argc, char *argv[])
{
QApplication a(argc, argv);


QBarSet *set0 = new QBarSet("Jane");
QBarSet *set1 = new QBarSet("John");
QBarSet *set2 = new QBarSet("Axel");
QBarSet *set3 = new QBarSet("Mary");
QBarSet *set4 = new QBarSet("Sam");

*set0 << 1 << 2 << 3 << 4 << 5 << 6;
*set1 << 5 << 0 << 0 << 4 << 0 << 7;
*set2 << 3 << 5 << 8 << 13 << 8 << 5;
*set3 << 5 << 6 << 7 << 3 << 4 << 5;
*set4 << 9 << 7 << 5 << 3 << 1 << 2;
QBarSeries *barseries = new QBarSeries();
barseries->append(set0);
barseries->append(set1);
barseries->append(set2);
barseries->append(set3);
barseries->append(set4);

QLineSeries *lineseries = new QLineSeries();
lineseries->setName("trend");
lineseries->append(QPoint(0, 4));
lineseries->append(QPoint(1, 15));
lineseries->append(QPoint(2, 20));
lineseries->append(QPoint(3, 4));
lineseries->append(QPoint(4, 12));
lineseries->append(QPoint(5, 17));

QChart *chart = new QChart();
chart->addSeries(barseries);
chart->addSeries(lineseries);
chart->setTitle("Line and barchart example");

QStringList categories;
categories << "Jan" << "Feb" << "Mar" << "Apr" << "May" << "Jun";
QBarCategoryAxis *axisX = new QBarCategoryAxis();
axisX->append(categories);
chart->addAxis(axisX, Qt::AlignBottom);
lineseries->attachAxis(axisX);
barseries->attachAxis(axisX);
axisX->setRange(QString("Jan"), QString("Jun"));

QValueAxis *axisY = new QValueAxis();
chart->addAxis(axisY, Qt::AlignLeft);
lineseries->attachAxis(axisY);
barseries->attachAxis(axisY);
axisY->setRange(0, 20);

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(440, 300);
window.show();

return a.exec();
}


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