ion-refresher on Android with native scrolling - scrolling inverted

[jgw96]

From @rolandoldengarm on January 25, 2016 23:36

When using the ion-refresher, with native scrolling enabled (which is default), in a specific usecase the scrolling is inverted.
How to reproduce: Pull down to refresh until the text/icon appears, but don't release. Scroll back up until the text/icon has disappeared. Now the scrolling of the list is inverted, i.e. if you scroll down with your finger, the items scroll in the opposite direction.

This cannot be reproduced on iOS.

Problem also does not occur with js scrolling.

Copied from original issue: ionic-team/ionic-framework#5194

[jgw96]

From @PerfectionCSGO on January 26, 2016 9:56

I can reproduce this. You get rid of the inversion effect when let go of it though.
Tested on an Android 5.x device.

[jgw96]

From @crossdot on January 29, 2016 12:44

The same behavior on my device. Tested on Android 5.x

[jgw96]

From @ramsaylee on March 7, 2016 13:4

+1 for this.
Tested on Android 4.4

[theartur]

+1 for this
Tested on Android 6.0.1

This is a bug in <ion-refresher>, controller $ionicRefresher, function handleTouchmove()

Change this snippet:
if (isDragging) { nativescroll(scrollParent, deltaY - dragOffset * -1); }

To this:
if (isDragging && isOverscrolling) { nativescroll(scrollParent, deltaY - dragOffset * -1); }

I made a pull request #203

#203