handling imgui char event from rendercanvas in jupyter_rfb

[kushalkolar]

Not sure where this has to be fixed, char events in imgui when using jupyter_rfb results in this:

Error during handling char event
Traceback (most recent call last):
  File "[/home/kushal/repos/rendercanvas/rendercanvas/_coreutils.py", line 41](http://localhost:8888/repos/rendercanvas/rendercanvas/_coreutils.py#line=40), in log_exception
    yield
  File "/home/kushal/repos/rendercanvas/rendercanvas/_events.py", line 197, in emit
    callback(event)
  File "/home/kushal/repos/wgpu-py/wgpu/utils/imgui/imgui_renderer.py", line 232, in _on_char_input
    self._backend.io.add_input_characters_utf8(event["char_str"])
                                               ~~~~~^^^^^^^^^^^^

The correct key is "data" not "char_str" , but not sure where this should be fixed, in wgpu or rendercanvas or jupyter_rfb. 😅

[almarklein]

The correct key is "data" not "char_str" ,

Oh interesting ... it looks like we use "char_str" in all our rendercanvas backends, but jupyter_rfb uses 'data'? I reckon this is my mistake; and I should update jupter_rfb to fix it.

Actually, let's go with 'data'.

[almarklein]

• In The imgui adapter can deal with both variations of the char event (and minor-bump) #772, the imgui adapter was made to work with both cases. This by itself should fix the issue.
• Resolve incompatible char events rendercanvas#143 makes the rendercanvas backends that use char_str to also use 'data'.
• Eventually we will use only 'data' for all backends.