Qt官方示例-条形图

Dear 丶 2023-06-27 08:46 165阅读 0赞

> 该示例显示如何创建条形图。

![main\_page.png][main_page.png]

## 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：

![what\_find.png][what_find.png]

*  或在以下**Qt安装目录**找到：

C:\Qt\{ 你的Qt版本}\Examples\{ 你的Qt版本}\charts\barchart

*  **相关链接**

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

*  Qt君公众号回复『**Qt示例**』获取更多内容。

[main_page.png]: https://img-blog.csdnimg.cn/202001052309219.png
[what_find.png]: https://img-blog.csdnimg.cn/2020010523083581.png