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The value of lastClickTime only gets updated in onTouchEnd, after the value of lastClickTime is already compared to touchEndTime. The value of lastClickTime is originally based on the event.timeStamp. When the event.timeStamp comes through as negative, the new value of touchStartTime can no longer be validly compared to the timeStamp, and the function will (often) return before lastClickTime can get updated. The same issue will manifest, until after the value of touchEndTime exceeds the original value of lastClickTime. Setting lastClickTime to 0 when switching over to get a value based on getTime will help to avoid this. When switching over to the non-event.timeStamp value, lastClickTime should only be set to 0 once. All time comparisons from then on out should be made against a point in time, obtained when switching over, and compare milliseconds since that time. This work was based on a pull request from @lasselaakkonen and is a fix to issue 549. ftlabs#550 ftlabs#549
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The value of lastClickTime only gets updated in onTouchEnd, after the value of lastClickTime is already compared to touchEndTime.
The value of lastClickTime is originally based on the event.timeStamp. When the event.timeStamp comes through as negative, the new value of touchStartTime can no longer be validly compared to the timeStamp, and the function will (often) return before lastClickTime can get updated. The same issue will manifest, until after the value of touchEndTime exceeds the original value of lastClickTime.
Setting lastClickTime to 0 when switching over to get a value based on getTime will help to avoid this. When switching over to the non-event.timeStamp value, lastClickTime should only be set to 0 once. All time comparisons from then on out should be made against a point in time, obtained when switching over, and compare milliseconds since that time.
This work was based on a pull request from @lasselaakkonen and is a fix to issue 549.
ftlabs#550
ftlabs#549