qt 自绘漂亮的饼状图-可参考学习

#include "mainwindow.h" #include "ui_mainwindow.h" // 将添加的widget控件件提升为QChartView类 MainWindow::MainWindow(QWidget *parent) :QMainWindow(parent),ui(new Ui::MainWindow) { ui->setupUi(this); QString strOK = "OK:90%"; float numOK = 0.9; QString strNG = "NG:10%"; float numNG = 0.1; printA( strOK, numOK, strNG, numNG); printB(); printC(); // printD(); printE(); } MainWindow::~MainWindow() { delete ui; } // 饼状图A void MainWindow::printA(QString strOK,float numOK,QString strNG,float numNG) { QPieSlice *slice_1 = new QPieSlice(this); slice_1->setLabel(strOK); slice_1->setValue(numOK); slice_1->setLabelVisible(true); slice_1->setColor(QColor(0,255,0,255)); //设置颜色 QPieSlice *slice_2 = new QPieSlice( this); slice_2->setLabel(strNG); slice_2->setValue(numNG); slice_2->setLabelVisible(true); slice_2->setColor(QColor(255,0,0,255)); //设置颜色 // 将两个饼状分区加入series QPieSeries *series = new QPieSeries(this); series->append(slice_1); series->append(slice_2); // 创建Chart画布 QChart *chart = new QChart(); chart->addSeries(series); // chart->setAnimationOptions(QChart::AllAnimations); // 设置显示时的动画效果-拉跨 chart->setTitle(u8"生产质量状况"); // 将参数设置到画布 ui->graphicsView->setChart(chart); ui->graphicsView->setRenderHint(QPainter::Antialiasing); ui->graphicsView->chart()->setTheme(QChart::ChartTheme(0)); } // 饼状图B void MainWindow::printB() { // 构造数据 [C盘 20%] [D盘 30%] [E盘 50%] QPieSlice *slice_c = new QPieSlice(QStringLiteral("C"), 0.1, this); slice_c->setLabelVisible(true); slice_c->setColor(QColor(255,0,0,200)); //设置颜色 QPieSlice *slice_d = new QPieSlice(QStringLiteral("D"), 0.3, this); slice_d->setLabelVisible(true); QPieSlice *slice_e = new QPieSlice(QStringLiteral("E"),0.6,this); slice_e->setLabelVisible(true); // 将两个饼状分区加入series QPieSeries *series = new QPieSeries(this); series->append(slice_c); series->append(slice_d); series->append(slice_e); // 创建Chart画布 QChart *chart = new QChart(); chart->addSeries(series); //chart->setAnimationOptions(QChart::AllAnimations); // 设置显示时的动画效果 chart->setTitle(u8"系统磁盘信息"); // 将参数设置到画布 ui->graphicsView_2->setChart(chart); ui->graphicsView_2->setRenderHint(QPainter::Antialiasing); // ui->graphicsView_2->chart()->setTheme(QChart::ChartTheme(3)); // 设置不同的主题 } void MainWindow::printC() { QPieSeries *series = new QPieSeries(); series->append("10%", 1); //设置百分百 series->append("20%", 2); series->append("70%", 7); series->setLabelsVisible(); //设置标签可见 QPieSlice *slice_red =series->slices().at(0); QPieSlice *slice_green =series->slices().at(1); QPieSlice *slice_blue =series->slices().at(2); slice_red->setColor(QColor(255,0,0,255)); //设置颜色 slice_green->setColor(QColor(0,255,0,255)); slice_blue->setColor(QColor(0,0,255,255)); //新建QChart，将series添加到chart中 QChart *chart = new QChart(); chart->addSeries(series); chart->setTitle("PieChart Example"); //设置标题 //chart->legend()->hide(); //隐藏图例 // 将参数设置到画布 ui->graphicsView_3->setChart(chart); ui->graphicsView_3->setRenderHint(QPainter::Antialiasing); ui->graphicsView_3->chart()->setTheme(QChart::ChartTheme(0)); } void MainWindow::printD() { QPieSeries *series = new QPieSeries(); series->append(u8"OK:30%",3); //添加标签"水果:30%" 和 百分值30% series->append(u8"NG:70%",7); series->setLabelsVisible(true); // series->setUseOpenGL(true); series->slices().at(0)->setColor(QColor(0,255,0)); //设置颜色 series->slices().at(0)->setLabelColor(QColor(0,255,0)); series->slices().at(1)->setColor(QColor(255,0,0)); series->slices().at(1)->setLabelColor(QColor(255,0,0)); // // 构造数据 [C盘 20%] [D盘 30%] [E盘 50%] // QPieSlice *slice_c = new QPieSlice(QStringLiteral("C"), 0.1, this); // slice_c->setLabelVisible(true); // slice_c->setColor(QColor(255,0,0,200)); //设置颜色 // QPieSlice *slice_d = new QPieSlice(QStringLiteral("D"), 0.3, this); // slice_d->setLabelVisible(true); // // 将两个饼状分区加入series // QPieSeries *series = new QPieSeries(this); // series->append(slice_c); // series->append(slice_d); QChart *m_chart = new QChart(); 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(100); // 将参数设置到画布 ui->graphicsView_4->setChart(m_chart); ui->graphicsView_4->setRenderHint(QPainter::Antialiasing); ui->graphicsView_4->chart()->setTheme(QChart::ChartTheme(0)); } void MainWindow::printE() { // 构造数据 [C盘 20%] [D盘 30%] [E盘 50%] QPieSlice *slice_c = new QPieSlice(QStringLiteral("C"), 0.1, this); QPieSlice *slice_d = new QPieSlice(QStringLiteral("D"), 0.9, this); // 将两个饼状分区加入series QPieSeries *series = new QPieSeries(this); series->append(slice_c); series->append(slice_d); series->setLabelsVisible(true); series->setUseOpenGL(true); series->slices().at(0)->setColor(QColor(0,255,0)); //设置颜色 series->slices().at(0)->setLabelColor(QColor(0,255,0)); series->slices().at(1)->setColor(QColor(255,0,0)); series->slices().at(1)->setLabelColor(QColor(255,0,0)); QChart *m_chart = new QChart(); 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(160 ,32 ,240));//设置颜色 m_chart->legend()->setLabelColor(QColor(0,0,255));//设置标签颜色 m_chart->legend()->setMaximumHeight(100); // 将参数设置到画布 ui->graphicsView_4->setChart(m_chart); ui->graphicsView_4->setRenderHint(QPainter::Antialiasing); ui->graphicsView_4->chart()->setTheme(QChart::ChartTheme(0)); } void MainWindow::on_pushButton_clicked() { QString strOK = "OK:60%"; float numOK = 0.6; QString strNG = "NG:40%"; float numNG = 0.4; printA( strOK, numOK, strNG, numNG); } void MainWindow::on_pushButton_2_clicked() { QString strOK