qcustomplot如何范围性拖动曲线X轴等

[yongxingongchen]

我想实现曲线范围性的拖动，如拖动横坐标-10到10，纵坐标-10到10，请问下如何实现，我看了下好像有个函数是
setRangeDragAxes(),感觉可以用，但是没实现出来，各位大神有没有想法，最好给出大致代码，谢谢

void MainWindow::setupSimpleDemo(QCustomPlot *customPlot)
{
  demoName = "Simple Demo";
  
  // add two new graphs and set their look:
  customPlot->addGraph();
  customPlot->graph(0)->setPen(QPen(Qt::blue)); // line color blue for first graph
  customPlot->addGraph();
  customPlot->graph(1)->setPen(QPen(Qt::red)); // line color red for second graph
  // generate some points of data (y0 for first, y1 for second graph):
  QVector<double> x(250), y0(250), y1(250);
  for (int i=0; i<250; ++i)
  {
    x[i] = i;
    y0[i] = qExp(-i/150.0)*qCos(i/10.0); // exponentially decaying cosine
    y1[i] = qExp(-i/150.0);              // exponential envelope
  }  
  customPlot->graph(0)->setData(x, y0);
  customPlot->graph(1)->setData(x, y1);
  // let the ranges scale themselves so graph 0 fits perfectly in the visible area:
  customPlot->graph(0)->rescaleAxes();
  // same thing for graph 1, but only enlarge ranges (in case graph 1 is smaller than graph 0):
  customPlot->graph(1)->rescaleAxes(true);
  // Note: we could have also just called customPlot->rescaleAxes(); instead
  // Allow user to drag axis ranges with mouse, zoom with mouse wheel and select graphs by clicking:
  customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom | QCP::iSelectPlottables);
//  QPointer<QCPAxis> mColorAxis;
//  mColorAxis.data()
//  customPlot->axisRect()->setRangeDragAxes(customPlot->axisRect()->axis(QCPAxis::atBottom),customPlot->axisRect()->axis(QCPAxis::atLeft));
}

[yongxingongchen]

自己帮顶下，求大神指导，谢谢

[赵4老师]

https://www.baidu.com/s?ie=utf-8&f=8&rsv_bp=0&rsv_idx=1&tn=baidu&wd=setRangeDragAxes

[yongxingongchen]

要能找到的话，我已经找到了，网上好像没有，能给点具体的代码吗？？

[yongxingongchen]

没有人用过qcustomPlot第三方库区写过曲线的吗？？

[小灸舞]

用过

[qq_32755907]

楼主，你解决了吗，我也遇到了这个问题，求指点