Qt官方示例-条形图

• 2020 年 2 月 13 日
• 筆記

该示例显示如何创建条形图。

0x01 创建图表容器

QChart *chart = new QChart();  chart->addSeries(series);  chart->setTitle("Simple barchart example");  chart->setAnimationOptions(QChart::SeriesAnimations);    QChartView *chartView = new QChartView(chart);  chartView->setRenderHint(QPainter::Antialiasing);  

0x02 配置坐标轴

QStringList categories;  categories << "Jan" << "Feb" << "Mar" << "Apr" << "May" << "Jun";  QBarCategoryAxis *axisX = new QBarCategoryAxis();  axisX->append(categories);  chart->addAxis(axisX, Qt::AlignBottom);  series->attachAxis(axisX);    QValueAxis *axisY = new QValueAxis();  axisY->setRange(0,15);  chart->addAxis(axisY, Qt::AlignLeft);  series->attachAxis(axisY);  

0x03 加载条形图数据项

QBarSet *set0 = new QBarSet("Jane");  QBarSet *set1 = new QBarSet("John");  QBarSet *set2 = new QBarSet("Axel");  QBarSet *set3 = new QBarSet("Mary");  QBarSet *set4 = new QBarSet("Samantha");    *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 *series = new QBarSeries();  series->append(set0);  series->append(set1);  series->append(set2);  series->append(set3);  series->append(set4);  

0x04 配置图例注解位置

chart->legend()->setVisible(true);  chart->legend()->setAlignment(Qt::AlignBottom); /* 显示在底部 */  

关于更多

• 在QtCreator软件可以找到：

• 或在以下Qt安装目录找到：

C:Qt{你的Qt版本}Examples{你的Qt版本}chartsbarchart  

• 相关链接

https://doc.qt.io/qt-5/qtcharts-barchart-example.html