/*public override bool OnInterceptTouchEvent (MotionEvent ev)
{
// Only accept single touch
if (ev.PointerCount != 1)
return false;
ev.OffsetLocation (0, TranslationY);
return CaptureMovementCheck (ev);
}*/
public override bool OnTouchEvent(MotionEvent e)
{
if (paneGestureDetector == null) {
var l = new DoubleTapListener (() => SetState (Opened && FullyOpened ? State.Opened : State.FullyOpened));
paneGestureDetector = new GestureDetector (Context, l);
}
paneGestureDetector.OnTouchEvent (e);
e.OffsetLocation (0, TranslationY);
if (e.Action == MotionEventActions.Down) {
CaptureMovementCheck (e);
return true;
}
if (!isTracking && !CaptureMovementCheck (e))
return true;
if (e.Action != MotionEventActions.Move || MoveDirectionTest (e))
velocityTracker.AddMovement (e);
if (e.Action == MotionEventActions.Move) {
var y = e.GetY ();
// We don't want to go beyond startY
if (state == State.Opened && y > startY
|| state == State.FullyOpened && y < startY)
return true;
// We reset the velocity tracker in case a movement goes back to its origin
if (state == State.Opened && y > oldY
|| state == State.FullyOpened && y < oldY)
velocityTracker.Clear ();
var traveledDistance = (int)Math.Round (Math.Abs (y - startY));
if (state == State.Opened)
traveledDistance = OffsetForState (State.Opened) - traveledDistance;
SetNewOffset (traveledDistance);
oldY = y;
} else if (e.Action == MotionEventActions.Up) {
velocityTracker.ComputeCurrentVelocity (1000, maxFlingVelocity);
if (Math.Abs (velocityTracker.YVelocity) > minFlingVelocity
&& Math.Abs (velocityTracker.YVelocity) < maxFlingVelocity)
SetState (state == State.FullyOpened ? State.Opened : State.FullyOpened);
else if (state == State.FullyOpened && contentOffsetY > Height / 2)
SetState (State.Opened);
else if (state == State.Opened && contentOffsetY < Height / 2)
SetState (State.FullyOpened);
else
SetState (state);
preTracking = isTracking = false;
velocityTracker.Clear ();
velocityTracker.Recycle ();
}
return true;
}
/*public override bool OnInterceptTouchEvent (MotionEvent ev)
* {
* // Only accept single touch
* if (ev.PointerCount != 1)
* return false;
* ev.OffsetLocation (0, TranslationY);
* return CaptureMovementCheck (ev);
* }*/
public override bool OnTouchEvent(MotionEvent e)
{
if (paneGestureDetector == null)
{
var l = new DoubleTapListener(() => SetState(Opened && FullyOpened ? State.Opened : State.FullyOpened));
paneGestureDetector = new GestureDetector(Context, l);
}
paneGestureDetector.OnTouchEvent(e);
e.OffsetLocation(0, TranslationY);
if (e.Action == MotionEventActions.Down)
{
CaptureMovementCheck(e);
return(true);
}
if (!isTracking && !CaptureMovementCheck(e))
{
return(true);
}
if (e.Action != MotionEventActions.Move || MoveDirectionTest(e))
{
velocityTracker.AddMovement(e);
}
if (e.Action == MotionEventActions.Move)
{
var y = e.GetY();
// We don't want to go beyond startY
if (state == State.Opened && y > startY ||
state == State.FullyOpened && y < startY)
{
return(true);
}
// We reset the velocity tracker in case a movement goes back to its origin
if (state == State.Opened && y > oldY ||
state == State.FullyOpened && y < oldY)
{
velocityTracker.Clear();
}
var traveledDistance = (int)Math.Round(Math.Abs(y - startY));
if (state == State.Opened)
{
traveledDistance = OffsetForState(State.Opened) - traveledDistance;
}
SetNewOffset(traveledDistance);
oldY = y;
}
else if (e.Action == MotionEventActions.Up)
{
velocityTracker.ComputeCurrentVelocity(1000, maxFlingVelocity);
if (Math.Abs(velocityTracker.YVelocity) > minFlingVelocity &&
Math.Abs(velocityTracker.YVelocity) < maxFlingVelocity)
{
SetState(state == State.FullyOpened ? State.Opened : State.FullyOpened);
}
else if (state == State.FullyOpened && contentOffsetY > Height / 2)
{
SetState(State.Opened);
}
else if (state == State.Opened && contentOffsetY < Height / 2)
{
SetState(State.FullyOpened);
}
else
{
SetState(state);
}
preTracking = isTracking = false;
velocityTracker.Clear();
velocityTracker.Recycle();
}
return(true);
}
