Hotkeys for TimeControlNode in Discrete screen

[pixelzoom]

Does TimeControlNode have hotkey support?
If so, is it enabled by default, or should it be enabled?
If so, what keyboard help should be added to the Discrete screen?

[pixelzoom]

TimeControlNode has not had a comprehensive hotkey design. One of its subcomponent (PlayPauseButton) supports a hotkey by default, while the other subcomponents (StepForwardButton, StepBackwardButton) do not support hotkeys. I think it would be odd to have partial support, so I'm going to disable the play/pause hotkey until there's uniform support - see phetsims/scenery-phet#682.

I've told @jessegreenberg that this is not blocking for Fourier 1.0 release. @arouinfar do you agree?

[arouinfar]

I was confused by this statement because MAL does have a hotkey for StepForwardButton:

One of its subcomponent (PlayPauseButton) supports a hotkey by default, while the other subcomponents (StepForwardButton, StepBackwardButton) do not support hotkeys.

But then I saw what @pixelzoom said in phetsims/scenery-phet#682:

And MAL added its own StepForwardButton support, which should be in TimeControlNode, see phetsims/scenery-phet#681.

@pixelzoom I agree that this is not blocking, as the TimeControlNode is not critical to the learning goals of Fourier: Making Waves.

[pixelzoom]

Thanks @arouinfar. Marking this issue as deferred, to be addressed in the future (after 1.0).

The general issue for TimeControlNode hotkeys is phetsims/scenery-phet#682.