QCustomPlot 一个X轴多个Y轴

文章目录大致效果如下相关代码如下centerWidgetLayout-addLayout(hboxLayout,1); customplot new QCustomPlot(centerWidget); centerWidgetLayout-addWidget(customplot,100); int xPointNum 1300 ; customplot-plotLayout()-clear(); //删除默认的 //多个Y轴 axisRect1 new QCPAxisRect(customplot); customplot-plotLayout()-addElement(0,0, axisRect1 ); axisRect1-axis(QCPAxis::atLeft)-setLabel(s); axisRect1-axis(QCPAxis::atBottom)-setRange(0, xPointNum); axisRect1-axis(QCPAxis::atLeft)-setRange(0, 55); //axisRect1-axis(QCPAxis::atRight)-setVisible(true); //一个X 多个平行的Y轴 axisRect1-addAxis(QCPAxis::atRight); axisRect1-axis(QCPAxis::atRight , 0)-setPadding(0); axisRect1-axis(QCPAxis::atRight , 1)-setPadding(10); axisRect1-axis(QCPAxis::atBottom, 0)-setPadding(20); axisRect1-axis(QCPAxis::atLeft)-setRange(0, 100); axisRect1-axis(QCPAxis::atRight, 0)-setRange(0, 50); axisRect1-axis(QCPAxis::atRight, 0)-setLabel(v); axisRect1-axis(QCPAxis::atRight, 1)-setRange(0, 200); axisRect1-axis(QCPAxis::atRight, 1)-setLabel(a); axisRect1-setupFullAxesBox(true); axisRect1-axis(QCPAxis::atRight, 0)-setTickLabels(true); //绘图 graph1 customplot-addGraph(axisRect1-axis(QCPAxis::atBottom), axisRect1-axis(QCPAxis::atLeft , 0)); graph2 customplot-addGraph(axisRect1-axis(QCPAxis::atBottom), axisRect1-axis(QCPAxis::atRight, 0)); graph3 customplot-addGraph(axisRect1-axis(QCPAxis::atBottom), axisRect1-axis(QCPAxis::atRight, 1)); graph1-setPen(QPen(Qt::red)); graph2-setPen(QPen(Qt::black)); graph3-setPen(QPen(Qt::blue)); m_pHorReffer new QCPItemStraightLine(customplot); m_pHorReffer-setPen(QPen(Qt::red, 2, Qt::DotLine)); //绑定坐标 m_pHorReffer-setClipAxisRect(axisRect1); m_pHorReffer-point1-setCoords( 30, 750);//设置点1的坐标 m_pHorReffer-point2-setCoords( 30, 0) ;//设置点2的坐标 connect(customplot, SIGNAL(mousePress(QMouseEvent*)), this, SLOT(MymousePressEvent(QMouseEvent*))); //mTag1 new AxisTag(graph1-valueAxis()); mTag1 new AxisTag(graph1-valueAxis()); mTag1-setPen(graph1-pen()); mTag1-updatePosition(0.0); mTag1-setText(QString::number( 0, f, 2)); //customplot-setInteractions(QCP::iRangeDrag|QCP::iRangeZoom| QCP::iSelectAxes | // QCP::iSelectLegend | QCP::iSelectPlottables); //生成游标 tracer new QCPItemTracer(customplot); tracer-setPen(QPen(Qt::red)); tracer-setBrush(QBrush(Qt::red)); tracer-setStyle(QCPItemTracer::tsCircle); tracer-position-setTypeX(QCPItemPosition::ptPlotCoords); tracer-position-setTypeY(QCPItemPosition::ptAxisRectRatio); tracer-position-setCoords(0.5, 0); tracer-setSize(4);//设置大小 mArrow new QCPItemLine(customplot); mArrow-setLayer(overlay); mArrow-setClipToAxisRect(false); mArrow-setHead(QCPLineEnding::esSpikeArrow); mArrow-end-setParentAnchor(tracer-position); mArrow-start-setParentAnchor(mArrow-end); mArrow-start-setCoords(0, 10); tracerLabel new QCPItemText(customplot); tracerLabel-setLayer(overlay); tracerLabel-setClipToAxisRect(false); tracerLabel-setPadding(QMargins(3, 0, 3, 0)); tracerLabel-setPen(QPen(Qt::black)); tracerLabel-setBrush(QBrush(Qt::green)); tracerLabel-setPositionAlignment(Qt::AlignTop | Qt::AlignHCenter);//上中间 tracerLabel-position-setParentAnchor(mArrow-start); //将游标说明锚固在tracer位置处实现自动跟随 tracer-position-setCoords(4, 1); //tracerLabel-position-setCoords(0, 15); mArrow-start-setCoords(0, 15); mArrow-end-setCoords(0, 0); tracerLabel-setText(###);多坐标系QWidget *centerWidget new QWidget(this); QVBoxLayout *centerWidgetLayout new QVBoxLayout(centerWidget); setCentralWidget(centerWidget); customplot new QCustomPlot(centerWidget); centerWidgetLayout-addWidget(customplot,100); customplot-plotLayout()-clear(); //删除默认的 axisRect1 new QCPAxisRect(customplot); customplot-plotLayout()-addElement(0,0, axisRect1 ); axisRect1-axis(QCPAxis::atLeft)-setRange(0, 10); axisRect1-axis(QCPAxis::atBottom)-setRange(0, 100); axisRect2 new QCPAxisRect(customplot); customplot-plotLayout()-addElement(1,0, axisRect2 ); axisRect2-axis(QCPAxis::atLeft)-setRange(0, 10); axisRect2-axis(QCPAxis::atBottom)-setRange(0, 100); axisRect3 new QCPAxisRect(customplot); customplot-plotLayout()-addElement(2,0, axisRect3 ); axisRect3-axis(QCPAxis::atLeft)-setRange(0, 10); axisRect3-axis(QCPAxis::atBottom)-setRange(0, 100); graph1 customplot-addGraph(axisRect1-axis(QCPAxis::atBottom), axisRect1-axis(QCPAxis::atLeft)); graph2 customplot-addGraph(axisRect2-axis(QCPAxis::atBottom), axisRect2-axis(QCPAxis::atLeft)); graph3 customplot-addGraph(axisRect3-axis(QCPAxis::atBottom), axisRect3-axis(QCPAxis::atLeft)); graph1-setPen(QPen(Qt::red)); graph2-setPen(QPen(Qt::black)); graph3-setPen(QPen(Qt::blue)); for(int i 0 ; i100; i) { x.append(i); //qsrand(QTime::currentTime().msec()); y1.append(qrand()%10); y2.append(qrand()%10); y3.append(qrand()%10); } graph1-addData(x,y1); graph2-addData(x,y2); graph3-addData(x,y3);X轴修改为时间戳鼠标点击游标多坐标系不同刻度显示对齐参照官网例子axis tags