qt实现功率谱和瀑布图

瀑布图

配置qcustomplot的例子网上有很多了，记录下通过qcustomplot实现的功率谱和瀑布图代码：

void WaveDisplay::plotWaterfall(MCustomPlot* p_imag)
{mCustomPlotLs = p_imag;mCustomPlotLs->plotLayout()->clear(); // clear default axis rect so we can start from scratchmCustomPlotLs->showTracer(true);QCPLayoutGrid *subLayoutF = new QCPLayoutGrid;QCPLayoutGrid *subLayoutL = new QCPLayoutGrid;mCustomPlotLs->setInteractions(QCP::iRangeDrag       //可平移| QCP::iRangeZoom        //可滚轮缩放| QCP::iSelectPlottables //可选中曲线| QCP::iSelectLegend );  //可选中图例wideAxisRectF = new QCPAxisRect(mCustomPlotLs);wideAxisRectL = new QCPAxisRect(mCustomPlotLs);mCustomPlotLs->plotLayout()->addElement(1, 0, subLayoutF);    // insert axis rect in first rowmCustomPlotLs->plotLayout()->addElement(0, 0, subLayoutL);    // sub layout in second row (grid layout will grow accordingly)QCPMarginGroup *marginGroup = new QCPMarginGroup(mCustomPlotLs);wideAxisRectF->setMarginGroup(QCP::msBottom, marginGroup);wideAxisRectL->setMarginGroup(QCP::msBottom, marginGroup);subLayoutF->addElement(0, 0, wideAxisRectF);wideAxisRectF->setupFullAxesBox(true);wideAxisRectF->axis(QCPAxis::atLeft)->setRange(-130, 0); // 设置轴上限和下限wideAxisRectF->axis(QCPAxis::atBottom)->setRange(0, 50);wideAxisRectF->axis(QCPAxis::atBottom)->ticker()->setTickCount(10);//10个主刻度wideAxisRectF->axis(QCPAxis::atBottom)->setLabel("频率(KHz)");wideAxisRectF->axis(QCPAxis::atLeft)->setLabel("dB");wideAxisRectF->axis(QCPAxis::atLeft)->setPadding(20);wideAxisRectF->axis(QCPAxis::atRight)->setTickLabels(true);wideAxisRectF->axis(QCPAxis::atRight)->setPadding(30);subLayoutL->addElement(0, 0, wideAxisRectL);wideAxisRectL->setupFullAxesBox(true);wideAxisRectL->axis(QCPAxis::atLeft)->setRange(0, 100);wideAxisRectL->axis(QCPAxis::atLeft)->setSubTicks(false);wideAxisRectL->axis(QCPAxis::atLeft)->setTicks(false);wideAxisRectL->axis(QCPAxis::atBottom)->setRange(0, 50);wideAxisRectL->axis(QCPAxis::atBottom)->ticker()->setTickCount(10);//10个主刻度wideAxisRectL->axis(QCPAxis::atBottom)->setLabel("频率(KHz)");wideAxisRectL->setRangeZoomFactor(0.8,1); // x轴设置缩放比例，y轴缩放比例为1，则不进行缩放// x轴以时间形式显示wideAxisRectL->addAxis(QCPAxis::atLeft)->setTickLabelColor(QColor(255,255,255)); // 左边添加一个纵轴QSharedPointer<QCPAxisTickerTime> timeTicker(new QCPAxisTickerTime);timeTicker->setTimeFormat("%h:%m:%s");wideAxisRectL->axis(QCPAxis::atLeft, 1)->setTicker(timeTicker);connect(wideAxisRectF->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), wideAxisRectL->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange)));connect(wideAxisRectL->axis(QCPAxis::atBottom), SIGNAL(rangeChanged(QCPRange)), wideAxisRectF->axis(QCPAxis::atBottom), SLOT(setRange(QCPRange)));// 功率谱mainGraphPower = mCustomPlotLs->addGraph(wideAxisRectF->axis(QCPAxis::atBottom), wideAxisRectF->axis(QCPAxis::atLeft)); // 添加图形mainGraphPower->rescaleKeyAxis(); // 自动调整轴范围以展示全部数据QPen pen;pen.setWidth(1);//线宽pen.setStyle(Qt::PenStyle::SolidLine);//虚线  solidline、dashline、dotline、dashdotline、dashdotdotlinepen.setColor(QColor(255, 253, 85, 255));mainGraphPower->setPen(pen);mainGraphPower->setSmooth(true);  //  开启平滑曲线// 瀑布图mainGraphTime = mCustomPlotLs->addGraph(wideAxisRectL->axis(QCPAxis::atBottom), wideAxisRectL->axis(QCPAxis::atLeft, 1));mainGraphTime->rescaleKeyAxis();colorMapPower = new QCPColorMap(wideAxisRectL->axis(QCPAxis::atBottom), wideAxisRectL->axis(QCPAxis::atLeft));int nx = 100;int ny = 100;colorMapPower->data()->setSize(nx, ny);                            // we want the color map to have nx * ny data pointscolorMapPower->data()->setRange(QCPRange(0, 100), QCPRange(0, 100));QCPColorScale *colorScale = new QCPColorScale(mCustomPlotLs); // 添加色条subLayoutL->addElement(0, 1, colorScale);colorScale->axis()->setTicks(false);colorScale->axis()->setTickLabels(false);colorScale->setType(QCPAxis::atRight);            // 刻度应为垂直条，刻度线/坐标轴标签右侧（实际上，右侧已经是默认值）colorMapPower->setColorScale(colorScale);         // 将颜色图与色标关联colorScale->axis()->setLabel("信号强度");colorScale->axis()->setLabelColor(Qt::white);QCPColorGradient gradient;  // 色条使用的颜色渐变gradient.setColorStopAt(0.0, QColor(246,239,166));   // 设置色条开始时的颜色 QColor(246,239,166)gradient.setColorStopAt(1.0, QColor(191,68,76));   // 设置色条结束时的颜色colorMapPower->setGradient(QCPColorGradient::gpJet); // QCPColorGradient::gpJet QCPColorGradient::gpPolarcolorMapPower->rescaleDataRange();mCustomPlotLs->replot(QCustomPlot::rpQueuedReplot);    // 异步重绘}