8d7b4f7991
They already worked in the PianorollMidiView, because that hands off enter/leave events to the parent EditingContext (a Pianoroll). But MidiRegionView and Editor were not interacting in the same way, so leaving a note object would not cause the Editor to do the right thing with the cursor.
Please see the Ardour web site at https://ardour.org/ for all documentation..
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https://ardour.org/development.html