gamepad: move the cursor continuously while holding the right stick.

[js-john]

Thank you very much, I learned a lot from your refactored code!
But there is a problem: if timer is removed, the cursor will only move when the x or y values of the right stick changed. This means when you hold the right stick, the cursor will not move.
I want to add the timer back. Is that OK?

[osy]

I tend to try to avoid any timers as recommended by Apple: https://developer.apple.com/library/archive/documentation/Performance/Conceptual/EnergyGuide-iOS/MinimizeTimerUse.html

Since VMCursor is a UIDynamicItem I think the best way is to use startMovement when thumbstick moves. Then use a UIDynamicAnimator to set a velocity (with 0 friction) based on how far the thumbstick is from the center. I can attempt this later if I have time or you can try it.

For scrolling, we can make a new UIDynamicItem to track it and share the same logic.

[js-john]

I tend to try to avoid any timers as recommended by Apple: https://developer.apple.com/library/archive/documentation/Performance/Conceptual/EnergyGuide-iOS/MinimizeTimerUse.html

Since VMCursor is a UIDynamicItem I think the best way is to use startMovement when thumbstick moves. Then use a UIDynamicAnimator to set a velocity (with 0 friction) based on how far the thumbstick is from the center. I can attempt this later if I have time or you can try it.

For scrolling, we can make a new UIDynamicItem to track it and share the same logic.

ok, I am working on this.