Behavior seems broken on Samsung Galaxy Tab 2

[jpalermo]

When I try to draw on the canvas, I get a short line segment.

If I then try touching somewhere else I get a line that connects the end of the first line segment to my new touch point.

That behavior then continues, new tiny segment, connected to the previous segment.

This is happening on the default internet browser (and thus in web views from applications too). It does not happen in Chrome on the device though. Other signature libraries seem to work fine.

[thomasjbradley]

I haven't seen that happen before. What version of Android is your device running?

[jpalermo]

4.1.1

For some reason it seems like the touchmove event is not being fired when I'm moving. I've seen other signature libraries working on the device, I'll take a look and see if they do anything special.

BTW, the source is really well factored. Very clean and easy to read. Excellent job.

[jpalermo]

Interesting, it seems that doing a preventDefault on the touchmove event fixes the problem.

I'm not really sure what the default action is for a touchmove event is though.

Mozilla seems to always call it in their touchmove examples, but they don't explain why.
https://developer.mozilla.org/en-US/docs/Web/Guide/DOM/Events/Touch_events

[thomasjbradley]

Maybe that's to prevent it from scrolling.

p.s. Thanks for the compliments on the code.