Function background

qcustomplot/qcustomplot.h:3634–3634

  QRect viewport() const { return mViewport; }
  double bufferDevicePixelRatio() const { return mBufferDevicePixelRatio; }
  QPixmap background() const { return mBackgroundPixmap; }
  bool backgroundScaled() const { return mBackgroundScaled; }
  Qt::AspectRatioMode backgroundScaledMode() const { return mBackgroundScaledMode; }
  QCPLayoutGrid *plotLayout() const { return mPlotLayout; }