Shift-wheel_down not working

Scripting Issues
1

listening for wheel_down works just fine, e.g.: base.accept('wheel_down', lambda: self.inc_near_clip(1))

however, listening for shift+wheel_down does not ever trigger: base.accept('shift-wheel_down', lambda: self.inc_near_clip(10))

Any ideas? Is shift not composable with wheel_down? Shift does work fine with mouse1 e.g.: base.accept("shift-mouse1", self.create_landmark)

2

That’s strange. The following code works for me when I roll down the mouse wheel while holding down the shift key:

from direct.showbase.ShowBase import ShowBase

base = ShowBase()
base.accept("shift-wheel_down", lambda: print("Wheel down!"))
#base.messenger.toggle_verbose()
base.run()

You could print out all events being thrown by calling base.messenger.toggle_verbose; perhaps doing so could shed some light on what’s happening.

3

Interesting. Your minimal example does not work for me on MacOS, but works fine on Windows. So, it looks like it’s just an OS-specific bug.

4

I have a suspicion of what might be the cause, can you try this:

  1. Hold shift down
  2. Press any regular key (eg. A)
  3. Roll the mouse wheel
  4. Release shift

Does shift-wheel_up/down fire in this scenario?