qt 波形图

今天研究了一下linxu和windows下利用QT跨平台开发GUI，为将来嵌入式图形界面的开发做准备，用到了开源波形库QCustomPlot，个人觉得比MFC上画的效果好多了，主要在MFC还没有试过用GDIPlus画图，所以没有渐变和平滑效果，以后有机会逐渐完善，附上效果图和主要源码

// 设置纵坐标名称
    ui->widgetPlot->yAxis->setLabel("应变应力(单位:με)");

    // 设置纵坐标范围
    ui->widgetPlot->yAxis->setRange(Plot1_MinY, Plot1_MaxY);

    // 设置横坐标范围
    ui->widgetPlot->xAxis->setRange(0, Plot1_MaxX);

    //设置坐标颜色/坐标名称颜色
    ui->widgetPlot->yAxis->setLabelColor(TextColor);
    ui->widgetPlot->xAxis->setTickLabelColor(TextColor);
    ui->widgetPlot->yAxis->setTickLabelColor(TextColor);
    ui->widgetPlot->xAxis->setBasePen(QPen(TextColor, TextWidth));
    ui->widgetPlot->yAxis->setBasePen(QPen(TextColor, TextWidth));
    ui->widgetPlot->xAxis->setTickPen(QPen(TextColor, TextWidth));
    ui->widgetPlot->yAxis->setTickPen(QPen(TextColor, TextWidth));
    ui->widgetPlot->xAxis->setSubTickPen(QPen(TextColor, TextWidth));
    ui->widgetPlot->yAxis->setSubTickPen(QPen(TextColor, TextWidth));
    ui->widgetPlot->xAxis->setUpperEnding(QCPLineEnding::esSpikeArrow);
    ui->widgetPlot->yAxis->setUpperEnding(QCPLineEnding::esSpikeArrow);

    //设置画布背景色
    QLinearGradient plotGradient;
    plotGradient.setStart(0, 0);
    plotGradient.setFinalStop(0, 350);
    plotGradient.setColorAt(0, QColor(80, 80, 80));
    plotGradient.setColorAt(1, QColor(50, 50, 50));
    ui->widgetPlot->setBackground(plotGradient);

    //设置坐标背景色
    QLinearGradient axisRectGradient;
    axisRectGradient.setStart(0, 0);
    axisRectGradient.setFinalStop(0, 350);
    axisRectGradient.setColorAt(0, QColor(80, 80, 80));
    axisRectGradient.setColorAt(1, QColor(30, 30, 30));
    ui->widgetPlot->axisRect()->setBackground(axisRectGradient);

    //设置图例提示位置及背景色
    ui->widgetPlot->axisRect()->insetLayout()->setInsetAlignment(0, Qt::AlignTop | Qt::AlignRight);
    ui->widgetPlot->legend->setBrush(QColor(255, 255, 255, 200));

    // 字体
    QFont tickLabelFont("微软雅黑", 12, QFont::Light);
    ui->widgetPlot->xAxis->setTickLabelFont(tickLabelFont);
    ui->widgetPlot->yAxis->setTickLabelFont(tickLabelFont);
    ui->widgetPlot->yAxis->setLabelFont(tickLabelFont);

    // 曲线
    QVector plot_keys;
    QVector plot_values;
    for (int i=0; iwidgetPlot->addGraph();
    ui->widgetPlot->graph(0)->setName("力度值(单位:N)");
    ui->widgetPlot->graph(0)->setPen(QPen(Plot1_LineColor, LineWidth));
    ui->widgetPlot->graph(0)->setScatterStyle(
        QCPScatterStyle(QCPScatterStyle::ssCircle,
        QPen(Plot1_DotColor, LineWidth),
        QBrush(Plot1_DotColor), DotWidth));

    // 设置静态曲线的横坐标范围及自适应横坐标
    ui->widgetPlot->xAxis->setRange(0, Plot1_MaxX, Qt::AlignLeft);

    ui->widgetPlot->graph(0)->setData(plot_keys, plot_values);
    ui->widgetPlot->graph(0)->rescaleAxes();

    ui->widgetPlot->replot();