Re: [OpenSmalltalk/opensmalltalk-vm] Mouse Wheel Events (#41)

 

Mouse wheels have been implemented in this commit for OSX and unix VM:

897ef17

I'm also proposing #461 for windows VM

Those events will be generated with a VM parameter saved with image.
In Squeak 5.3, see: Smalltalk sendMouseWheelEvents: true..

So we are near to close this issue...

However, the linux and OSX commit do not report button and modifiers state correctly (correctly = like every other mouse event).
We have to change that.

Also, some devices (like MacBook trackpad) generate a flow of wheel events with very small deltas (far less than 120, I observed deltas down to 1!).
This delivers far too many events to image side, making Morphic not responsive.
Thus we shall better accumulate a few of those events at VM side until a threshold is reached.
I have hardcoded a threshold of 20 on windows VM (WHEEL_DELTA/6), it kind of works for me... (maybe 10 would give a greater sensitivity).

I will create another branch with fixes for OSX/linux.

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Mabye we should introduce a "I'm interested in these kind of Events" mask sent to the VM…

So we can forego creating events the image is not interested in, all the way down to no events at all, for special purposes…

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