https://www.quora.com/What-is-the-GUI-library-used-in-creating-Blender-3d-software https://www.quora.com/What-is-the-GUI-library-used-in-creati... check out thi

https://www.quora.com/What-is-the-GUI-library-used-in-creating-Blender-3d-software https://www.quora.com/What-is-the-GUI-library-used-in-creati... check out this explanation of how Blender's UI is implemented - same approach would make sense (maybe even reuse same "toolkit") here because you'd have "drawing code" in you app anyway, so why not use it to draw parts of the UI too, and you'd also want graphics card acceleration for some operations too