qcustomplot2.1.1绘制瀑布水平流动实例
时间: 2023-11-14 21:04:27 浏览: 81
QCustomPlot 2.1.1
以下是使用QCustomPlot 2.1.1绘制瀑布水平流动的代码示例:
```
QCustomPlot *customPlot = new QCustomPlot(this);
// 设置画布大小
customPlot->setGeometry(0, 0, 800, 600);
// 设置图例显示位置
customPlot->axisRect()->insetLayout()->setInsetAlignment(0, Qt::AlignTop|Qt::AlignHCenter);
// 添加颜色刻度
QCPColorScale *colorScale = new QCPColorScale(customPlot);
customPlot->plotLayout()->addElement(0, 1, colorScale);
colorScale->setType(QCPAxis::atBottom);
colorScale->axis()->setLabel("Color Scale");
// 添加图像
QCPItemPixmap *pixmapItem = new QCPItemPixmap(customPlot);
pixmapItem->setScaled(true);
pixmapItem->setPixmap(QPixmap(":/images/image.png"));
// 添加瀑布图
QCPItemTracer *tracer = new QCPItemTracer(customPlot);
tracer->setInterpolating(true);
tracer->setGraph(customPlot->addGraph());
tracer->setGraphKey(0);
// 设置瀑布图的数据
QCPColorMap *colorMap = new QCPColorMap(customPlot->xAxis, customPlot->yAxis);
colorMap->setDataRange(QCPRange(0, 1), QCPRange(0, 50));
colorMap->setDataScaleType(QCPAxis::stLogarithmic);
colorMap->setGradient(QCPColorGradient::gpGrayscale);
colorMap->setData(new QCPColorMapData(50, 1, QCPRange(0, 1), QCPRange(0, 50)));
// 将瀑布图与颜色刻度相关联
colorMap->setColorScale(colorScale);
// 将光标与瀑布图相关联
tracer->setGraph(colorMap->data()->densityMap());
customPlot->rescaleAxes();
customPlot->replot();
```
这段代码将创建一个QCustomPlot对象,并在其上绘制一个瀑布图。瀑布图将显示一个图像,并将数据作为颜色密度图显示出来。可以使用鼠标将光标拖动到瀑布图上,并查看颜色刻度上的颜色值。
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