How to make a Bezier curve to connect GraphItem objects instead of straight line connections

[Shrabya Timsina]

I am plotting a tree structure using the GraphItem class and a Viewbox in pyqtgraph 0.10. Currently I have the following image, where the dot objects

are connected by straight lines:

I need those lines to be actually curved using any Bezier function to look more like this (ignore orange boxes and line thickness):

The source code for pyqtgraph does not seem to give any hints about how those connection lines can be modified, or whether it is even allowed.

Any help would be appreciated.

[Sebastian Höfer]

Hello Shrabya,

unfortunately there's no ready-made solution in Pyqtgraph.

What you can do is to create your own GraphItem class (by inheriting from the original GrapItem) and extend the line-drawing-part with Qt's Bezier drawing functions. You can create the desired shapes with the "quadTo" and "cubicTo" functions in QPainterPath.

Cheers

Sebastian

[Shrabya Timsina]

Thank you for the guidance! Hopefully I can implement it too!