Qt使用QCharts
参考: https://www.cnblogs.com/linuxAndMcu/p/11381839.html
使用准备
在pro中, 添加 QT+= charts
然后在界面头文件中添加头文件并声明命名空间,添加:
#include <QtCharts>
QT_CHARTS_USE_NAMESPACE
使用QChartView类
在绘制 ui 窗体时，从 designer 的工具箱中选择一个 “Widget” 类型的控件，然后在它上面单击鼠标右键，选择 “提升为”。
在弹出的界面中，填写 "提升的类名称" 为: QChartView，头文件名称会自动生成，我们不用关心。然后单击“添加”按钮即可。
使用思路
绘制曲线
2.QChart之曲线图
绘制曲线图需要用到3个类
QSplineSeries: 用于创建有由一系列数据组成的曲线.类似的还有QPieSeries(饼图数据). QLineSeries(折线数据)
QChart: 图表界面,用来管理图表内容,颜色,大小等
QChartView: 负责显示QChart
代码如下所示:
m_chart = new QChart();
QSplineSeries *series1 = new QSplineSeries();//实例化一个QLineSeries对象
series1->setColor(QColor(0,100,255));
series1->append(QPointF(0,qrand()%200)) ;
series1->append(QPointF(30,qrand()%200)) ;
series1->append(QPointF(60,qrand()%200)) ;
series1->append(QPointF(90,qrand()%200)) ;
series1->append(QPointF(120,qrand()%200)) ;
series1->setName("线条1");
series1->setVisible(true);
series1->setPointLabelsFormat("(@xPoint,@yPoint)");
series1->setPointLabelsVisible(true);
m_chart->setTheme(QChart::ChartThemeLight);//设置白色主题
m_chart->setDropShadowEnabled(true);//背景阴影
m_chart->setAutoFillBackground(true); //设置背景自动填充
m_chart->addSeries(series1);//添加系列到QChart上
m_chart->setTitleBrush(QBrush(QColor(0,0,255)));//设置标题Brush
m_chart->setTitleFont(QFont("微软雅黑"));//设置标题字体
m_chart->setTitle("曲线图");
//创建X轴和Y轴
QValueAxis *axisX = new QValueAxis;
axisX->setRange(0,150); //默认则坐标为动态计算大小的
axisX->setLabelFormat("%dS");
QValueAxis *axisY = new QValueAxis;
axisY->setRange(0,250); //默认则坐标为动态计算大小的
axisY->setTitleText("value值");
m_chart->setAxisX(axisX,series1);
m_chart->setAxisY(axisY,series1);
//m_chart->createDefaultAxes(); //或者创建默认轴
//修改说明样式
m_chart->legend()->setVisible(true);
m_chart->legend()->setAlignment(Qt::AlignBottom);//底部对齐
m_chart->legend()->setBackgroundVisible(true);//设置背景是否可视
m_chart->legend()->setAutoFillBackground(true);//设置背景自动填充
m_chart->legend()->setColor(QColor(222,233,251));//设置颜色
m_chart->legend()->setLabelColor(QColor(0,100,255));//设置标签颜色
m_chart->legend()->setMaximumHeight(50);
QChartView *chartView = new QChartView(m_chart);
chartView->setRenderHint(QPainter::Antialiasing);
QVBoxLayout *pVLayout = new QVBoxLayout(this);
pVLayout->addWidget(chartView);
resize(960, 720);
3.QChart之饼图
绘制饼图需要用到3个类
QSplineSeries: 用于创建有由一系列数据组成的饼图数据
QChart: 图表界面,用来管理图表内容,颜色,大小等
QChartView:负责显示QChart
效果如下:
m_chart = new QChart();
QPieSeries *series = new QPieSeries();
series->append("水果:30%",3); //添加标签"水果:30%" 和 百分值30%
series->append("零食:20%",2);
series->append("主食:50%",5);
series->setLabelsVisible(true);
series->setUseOpenGL(true);
series->slices().at(0)->setColor(QColor(13,128,217)); //设置颜色
series->slices().at(0)->setLabelColor(QColor(13,128,217));
series->slices().at(1)->setColor(QColor(69,13,217));
series->slices().at(1)->setLabelColor(QColor(69,13,217));
series->slices().at(2)->setColor(QColor(13,217,152));
series->slices().at(2)->setLabelColor(QColor(13,217,152));
m_chart->setTheme(QChart::ChartThemeLight);//设置白色主题
m_chart->setDropShadowEnabled(true);//背景阴影
m_chart->addSeries(series);//添加系列到QChart上
m_chart->setTitleBrush(QBrush(QColor(0,0,255)));//设置标题Brush
m_chart->setTitleFont(QFont("微软雅黑"));//设置标题字体
m_chart->setTitle("饼状图");
//修改说明样式
m_chart->legend()->setVisible(true);
m_chart->legend()->setAlignment(Qt::AlignBottom);//底部对齐
m_chart->legend()->setBackgroundVisible(true);//设置背景是否可视
m_chart->legend()->setAutoFillBackground(true);//设置背景自动填充
m_chart->legend()->setColor(QColor(222,233,251));//设置颜色
m_chart->legend()->setLabelColor(QColor(0,100,255));//设置标签颜色
m_chart->legend()->setMaximumHeight(50);
QChartView *chartView = new QChartView(m_chart);
chartView->setRenderHint(QPainter::Antialiasing);
QVBoxLayout *pVLayout = new QVBoxLayout(this);
pVLayout->addWidget(chartView);
resize(960, 720);
- QChart之条形图
绘制条形图需要用到4个类
QBarSet: 一个条形集合
QBarSeries: 用来封装多个QBarSet的条形数据
QChart: 图表界面,用来管理图表内容,颜色,大小等
QChartView: 负责显示QChart
效果如下:
代码如下:
m_chart = new QChart();
//创建3个条线数据
QBarSet *set0 = new QBarSet("零食");
QBarSet *set1 = new QBarSet("水果");
QBarSet *set2 = new QBarSet("主食");
*set0 << 158 << 685 << 458 << 260 << 354; //向零食数据添加这4个月的销售数据
*set1 << 350 << 725 << 602 << 523 << 458;
*set2 << 222 << 350 << 598 << 480 << 687;
set0->setLabelColor(QColor(0,0,255)); //设置条形数据颜色
set1->setLabelColor(QColor(0,0,255));
set2->setLabelColor(QColor(0,0,255));
QBarSeries *series = new QBarSeries();
series->append(set0);
series->append(set1);
series->append(set2);
series->setVisible(true);
series->setLabelsVisible(true);
m_chart->setTheme(QChart::ChartThemeLight);//设置白色主题
m_chart->setDropShadowEnabled(true);//背景阴影
m_chart->addSeries(series);//添加系列到QChart上
m_chart->setTitleBrush(QBrush(QColor(0,0,255)));//设置标题Brush
m_chart->setTitleFont(QFont("微软雅黑"));//设置标题字体
m_chart->setTitle("超市销售条形图");
//创建X轴和Y轴
QBarCategoryAxis *axisX = new QBarCategoryAxis;
axisX->append("一月");
axisX->append("二月");
axisX->append("三月");
axisX->append("四月");
axisX->append("五月");
axisX->setLabelsColor(QColor(7,28,96));
QValueAxis *axisY = new QValueAxis;
axisY->setRange(0,1000); //改为setRange(0,1);则表示坐标为动态计算大小的
axisY->setTitleText("价格");
axisY->setLabelFormat("%d$");
m_chart->setAxisX(axisX,series);
m_chart->setAxisY(axisY,series);
//修改说明样式
m_chart->legend()->setVisible(true);
m_chart->legend()->setAlignment(Qt::AlignBottom);//底部对齐
m_chart->legend()->setBackgroundVisible(true);//设置背景是否可视
m_chart->legend()->setAutoFillBackground(true);//设置背景自动填充
m_chart->legend()->setColor(QColor(222,233,251));//设置颜色
m_chart->legend()->setLabelColor(QColor(0,100,255));//设置标签颜色
m_chart->legend()->setMaximumHeight(50);
QChartView *chartView = new QChartView(m_chart);
chartView->setRenderHint(QPainter::Antialiasing);
QVBoxLayout *pVLayout = new QVBoxLayout(this);
pVLayout->addWidget(chartView);
resize(960, 720);
