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Merge pull request #2118 from NativeScript/TheOriginalJosh-use-getRawX-Y-instead-of-getX-Y-to-allow-smoother-panning-coordinates

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The original josh use get raw x y instead of get x y to allow smoother panning coordinates
This commit is contained in:
Alexander Vakrilov
2016-05-18 16:42:44 +03:00
parent 6b69ba1904 1f4c93d270
commit 30ea1b0276
1 changed files with 22 additions and 12 deletions
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34
ui/gestures/gestures.android.ts
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@ -110,7 +110,7 @@ export class GesturesObserver extends common.GesturesObserver {
this._eventData = new TouchGestureEventData();
}
this._eventData.prepare(this.target, motionEvent);
this._eventData.prepare(this.target, motionEvent);
_executeCallback(this, this._eventData);
}
@ -468,7 +468,7 @@ class CustomPanGestureDetector {
}
private trackStart(currentEvent: android.view.MotionEvent) {
let inital = this.getMotionEventCenter(this.lastEventCache ? this.lastEventCache : currentEvent);
let inital = this.getEventCoordinates(this.lastEventCache ? this.lastEventCache : currentEvent);
this.initialX = inital.x;
this.initialY = inital.y;
this.isTracking = true;
@ -478,7 +478,7 @@ class CustomPanGestureDetector {
}
private trackChange(currentEvent: android.view.MotionEvent) {
let current = this.getMotionEventCenter(currentEvent);
let current = this.getEventCoordinates(currentEvent);
this.deltaX = current.x - this.initialX;
this.deltaY = current.y - this.initialY;
@ -486,18 +486,28 @@ class CustomPanGestureDetector {
_executeCallback(this.observer, args);
}
private getMotionEventCenter(event: android.view.MotionEvent): { x: number, y: number } {
let count = event.getPointerCount();
let res = { x: 0, y: 0 };
for (var i = 0; i < count; i++) {
res.x += event.getX(i);
res.y += event.getY(i);
private getEventCoordinates(event: android.view.MotionEvent): { x: number, y: number } {
const count = event.getPointerCount();
if (count === 1) {
return {
x: event.getRawX() / this.density,
y: event.getRawY() / this.density
};
}
else {
const offX = event.getRawX() - event.getX();
const offY = event.getRawY() - event.getY();
let res = { x: 0, y: 0 };
res.x /= (count * this.density);
res.y /= (count * this.density);
for (let i = 0; i < count; i++) {
res.x += event.getX(i) + offX;
res.y += event.getY(i) + offY;
}
return res;
res.x /= (count * this.density);
res.y /= (count * this.density);
return res;
}
}
}