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Example "graphicsproxy".

The example shows how to embed QCustomPlot in the QGraphicsScene to plot complex graphics on top of QCustomPlot and how to adapt coordinates of QCustomPlot to the local coordinate system of QGraphicsScene.

celleditors

Users can adjust the size of the region-of-interest rectangle and click on Set toROI button to make viewport axes range matching the rectangle.

Region of interest coordinates, as well as axes range and zoom level, are displayed in the QTreeView on the right. Values changed through the tree are propagated back to the plot.

Application data

Application model contains four items.

  • RegionOfInterestItem contains coordinates of the roi rectangle.
  • Data2DItem contains 2D histogram to show (data points and data axes definition).
  • ColorMapItem contains link to Data2DItem and additional presentation properties (i.e. gradient).
  • ColorMapViewport defines viewport axes, color bar on the right and is intended to show ColorMapItem.

Other classes

  • RegionOfInterestView represents RegionOfInterestItem on QGraphicsScene.
  • RegionOfInterestController establishes communication between item and view.