• Environment:
  • Flutter revision c942ed4
  • Running Gallery on Pixelbook

I added a log statement at the beginning of PrimaryPointerGestureRecognizer.handleEvent to print the target event,

    print('${event.pointer} ${event.toStringShort()} ${event.buttons}');

then perform the following operation using a mouse over any button:

• Press RMB and hold
• Press LMB and hold
• Release RMB
• Release LMB

And this is the log printed:

I/flutter ( 5111): 24 PointerDownEvent#adf1a 2
I/flutter ( 5111): 24 PointerMoveEvent#93ff8 3
I/flutter ( 5111): 24 PointerMoveEvent#735c8 1
I/flutter ( 5111): 24 PointerUpEvent#522ea 0

The middle 2 events are PointerMoveEvent, although there were only button changes and no movement. I kind of understand why this is the case, but maybe we want to distinguish the 2 cases or rename the event.