Drawsana View not rendering any shape layers once, palm of the drawer sits on the view for some time

[asiaoverseas]

When someone draws in the drawsana view, when its an ipad, its natural that, the palm of the hand of person sits on the screen. So there is this weird bug, where, the drawing functionality works properly, until, someone puts their hand or palm on screen. After that, trying to draw on new shape, nothing gets drawn.

I added break points to check the flow, and though nothing gets drawn the flow is working i.e. did-pan gesture recogniser gets called, but doesn't render new layers.

[stevelandeyasana]

Thanks so much for digging in to investigate. This sounds pretty weird and I'm not immediately sure what the problem is.

[ramjyroo]

@stevelandeyasana In my case - when the bottom up swipe gesture was done to bring up iOS dock - the PAN gesture was draw view was also inadvertently getting triggered as I had kept the draw area span the entire screen.

During the swipe up gesture - PAN gesture recogniser never seems to get end event and as a result when the dock is dismissed and app is in foreground - it somehow keeps detecting "changed" events but never sees a end event. So no drawing is rendered.

For now - I have made the drawing area smaller to avoid clash of pan gesture of drawsana with that bottom up swipe in iPadOS

[stevelandeyasana]

Great clues, thanks! I'll see if I can dig deeper.

[ramjyroo]

Thanks a bunch for this awesome framework @stevelandeyasana

[ramjyroo]

@stevelandeyasana A lot of my beta testers also inadvertently used their palm or touched multiple points on the screen - there by triggering touches that get ignored. Once it goes it into this state - Immediate Pan gesture is not getting out of this state.

Should I set a bool variable when a ignored touch ended is seen and reset the trackTouch object in the immediate next touches began.

// setting didIgnoreToucheEnded to true when touchesEnded ignores the touch
guard touches.contains(trackedTouch) else {
   print("touchesEnded - Skip processing as trackedTouch is not in touches set")
   **didIgnoreToucheEnded = true**
   return
 }

And check the didIgnoreToucheEnded in touches began to reset trackTouch? Any suggestions from you in this regard will greatly help.
Thanks in advance
Ram

[ramjyroo]

@stevelandeyasana As a gentle reminder - could you reply on my proposal above?. Thanks a bunch in advance

[stevelandeyasana]

I haven't had time to look at the code and see if this will get the result you expect, but if you fork the library and try it out and it works, I'd be happy to merge the change.