Qt QChart 创建图表的实现方法

目录效果流程代码1. 饼图2. 柱图3. 折/曲线图4. 区域图

本文主要介绍了Qt QChart 创建图表，分享给大家，也给自己留个笔记，废话不多说，具体如下：

效果

流程

代码

1. 饼图

// 保存多个扇形QList<QPieSlice *> slices;for (int i = 1; i <= 10; ++i){// 创建一个扇形QPieSlice * slice = new QPieSlice(QString::number(i),i);slices << slice;}// 创建一个饼图系列QPieSeries * pieSeries = new QPieSeries;// 当鼠标悬浮时设置标签可见，设置饼图扇形分离QObject::connect(pieSeries,&QPieSeries::hovered, [](QPieSlice *slice, bool state) {slice->setLabelVisible(state);slice->setExploded(state);});// 将所有扇形所加到饼图中pieSeries->append(slices);// 创建一个图表QChart * chart = new QChart;// 设置标题chart->setTitle(QStringLiteral("饼图"));// 设置动画chart->setAnimationOptions(QChart::AllAnimations);// 设置图表的系列chart->addSeries(pieSeries);// 创建图表视图，显示图表 pView = new QChartView(chart);// 设置抗锯齿pView->setRenderHint(QPainter::Antialiasing);// 添加图表视图到布局 QVBoxLayout *layout = new QVBoxLayout(this); layout->addWidget(pView);

2. 柱图

// 保存柱集合QList<QBarSet *> sets;for (int i = 1; i <= 5; ++i){// 创建一个柱集合QBarSet * set = new QBarSet(QString("set").append(QString::number(i)));QList<qreal> values;for (int j = 1; j <= 5; ++j){values << qrand()%100;qDebug() << values;}set->append(values);sets << set;}// 创建一个柱图系列QBarSeries * barSeries = new QBarSeries;// 添加柱集合barSeries->append(sets);QChart * chart = new QChart;chart->setTitle(QStringLiteral("柱状图"));chart->setAnimationOptions(QChart::AllAnimations);chart->addSeries(barSeries);pView = new QChartView(chart);pView->setRenderHint(QPainter::Antialiasing);QVBoxLayout *layout = new QVBoxLayout(this);layout->addWidget(pView);

3. 折/曲线图

// 创建并保存点信息QList<QPointF> points;points << QPointF(0, -1) << QPointF(2, 2) << QPointF(3, 5) << QPointF(5, -5)<< QPointF(6, 0) << QPointF(7, 3);// 创建线图系列QLineSeries * lineSeries = new QLineSeries;// 曲线//QSplineSeries * lineSeries = new QSplineSeries;// 追加点lineSeries->append(points);QChart * chart = new QChart;chart->setTitle(QStringLiteral("线图"));chart->setAnimationOptions(QChart::AllAnimations);chart->addSeries(lineSeries);pView = new QChartView(chart);pView->setRenderHint(QPainter::Antialiasing);QVBoxLayout *layout = new QVBoxLayout(this);layout->addWidget(pView);

4. 区域图

QList<QPointF> pointsLower;pointsLower << QPointF(0, -1) << QPointF(2, 2) << QPointF(3, 5) << QPointF(5, -5)<< QPointF(6, 0) << QPointF(7, 3);// 创建一条线QLineSeries * lineSeriesLower = new QLineSeries;lineSeriesLower->append(pointsLower);QList<QPointF> pointsUpper;pointsUpper << QPointF(0, -1) << QPointF(2, 4) << QPointF(3, 3) << QPointF(5, 3)<< QPointF(6, 1) << QPointF(7, 5);// 创建另一条线QLineSeries * lineSeriesUpper = new QLineSeries;lineSeriesUpper->append(pointsUpper);// 两条线组成面QAreaSeries * areaSeries = new QAreaSeries(lineSeriesLower, lineSeriesUpper);QChart * chart = new QChart;chart->setTitle(QStringLiteral("区域图"));chart->setAnimationOptions(QChart::AllAnimations);chart->addSeries(areaSeries);pView = new QChartView(chart);pView->setRenderHint(QPainter::Antialiasing);QVBoxLayout *layout = new QVBoxLayout(this);layout->addWidget(pView);

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不要识途去改变他人，同样，也不要被他人所改变。改了，就不是自己了。