Qt 一般使用图标等一般是使用QChart (Qt5.7以后才有) 或者QCustomPlot (自定义图标来绘制图标) QWT第三方控件。
使用QChart 要在安装Qt的选择QChart 模块 否则 不能使用！！！
我用的是Qt5.8的就跟多案例
饼状图
主要代码：
m_chart = new QChart();
QPieSeries *series = new QPieSeries(); //连续的餅图数据
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:40%", 4);
series->append("其他:10%", 1);
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));
series->slices().at(3)->setColor(QColor(13, 217, 110));
series->slices().at(3)->setLabelColor(QColor(13, 217, 110));
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::AlignRight);//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(150);
QChartView *chartView = new QChartView(m_chart);
chartView->setRenderHint(QPainter::Antialiasing);
QVBoxLayout *pVLayout = new QVBoxLayout(this);
pVLayout->addWidget(chartView);
resize(960, 720);
条形图
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);
曲线图
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);
其他的都几乎差不多，折线图（Line Chart）, 面积图（Area Chart）,散点图（Scatter Chart）看Qt 自带的案例就很好理解了。
另：