WxAppWrap mouse events not caught with pygfx

[gselzer]

If you debug the following python script, and put breakpoints on WxWAppWrap.filter_mouse_events' on_mouse_move/on_mouse_press/on_mouse_release functions, you'll never hit the breakpoint. Works just fine when using vispy instead.

from __future__ import annotations

import ndv
import os

os.environ["NDV_GUI_FRONTEND"] = "wx"
os.environ["NDV_CANVAS_BACKEND"] = "pygfx"

try:
    img = ndv.data.cells3d()
except Exception as e:
    print(e)
    img = ndv.data.nd_sine_wave((10, 3, 8, 512, 512))

viewer = ndv.imshow(img)

The fix is likely something similar to this - I may just fix it as a part of #114 which really wants this to work.

[tlambert03]

Was looking closer at the pygfx code, and I think we might also want to look into whether we could actually just use that subwidget class (which is also publicly exposed) rather than the higher level canvas widget that we use. On mobile so can’t link easily atm

[gselzer]

Sure, I will take a look tomorrow