public override bool OnInterceptTouchEvent(CoordinatorLayout parent, Object child, MotionEvent ev)
{
if (parent.IsPointInChildBounds(child as SnackbarLayout, (int) ev.GetX(), (int) ev.GetY()))
{
switch (ev.ActionMasked)
{
case MotionEventActions.Down:
SnackbarManager.Instance().CancelTimeout(TSnackbar.getInstace().mManagerCallback);
break;
case MotionEventActions.Up:
case MotionEventActions.Cancel:
SnackbarManager.Instance().RestoreTimeout(TSnackbar.getInstace().mManagerCallback);
break;
}
}
return base.OnInterceptTouchEvent(parent, child, ev);
}
public override bool OnInterceptTouchEvent(
CoordinatorLayout parent, Java.Lang.Object childObject, MotionEvent @event)
{
View child = Android.Runtime.Extensions.JavaCast <View>(childObject);
if (!child.IsShown)
{
Debug.WriteLineIf(DebugTrace, $"OnInterceptTouchEvent: return false");
return(false);
}
int action = MotionEventCompat.GetActionMasked(@event);
// Record the velocity
if (action == (int)MotionEventActions.Down)
{
reset();
}
if (mVelocityTracker == null || mVelocityTracker.Handle == IntPtr.Zero)
{
mVelocityTracker = VelocityTracker.Obtain();
}
mVelocityTracker.AddMovement(@event);
switch (action)
{
case (int)MotionEventActions.Up:
case (int)MotionEventActions.Cancel:
mTouchingScrollingChild = false;
mActivePointerId = MotionEvent.InvalidPointerId;
// Reset the ignore flag
if (mIgnoreEvents)
{
mIgnoreEvents = false;
return(false);
}
break;
case (int)MotionEventActions.Down:
int initialX = (int)@event.GetX();
mInitialY = (int)@event.GetY();
View nestedScroll;
if (mNestedScrollingChildRef.TryGetTarget(out nestedScroll) && parent.IsPointInChildBounds(nestedScroll, initialX, mInitialY))
{
mActivePointerId = @event.GetPointerId(@event.ActionIndex);
//mTouchingScrollingChild = true;
}
mIgnoreEvents =
mActivePointerId == MotionEvent.InvalidPointerId &&
!parent.IsPointInChildBounds(child, initialX, mInitialY);
break;
}
if (!mIgnoreEvents && mViewDragHelper.ShouldInterceptTouchEvent(@event))
{
Debug.WriteLineIf(DebugTrace, $"OnInterceptTouchEvent: return true");
return(true);
}
// We have to handle cases that the ViewDragHelper does not capture the bottom sheet because
// it is not the top most view of its parent. This is not necessary when the touch event is
// happening over the scrolling content as nested scrolling logic handles that case.
View scroll;
var result = action == (int)MotionEventActions.Move &&
mNestedScrollingChildRef.TryGetTarget(out scroll) &&
!mIgnoreEvents && mState != STATE_DRAGGING &&
!parent.IsPointInChildBounds(scroll, (int)@event.GetX(), (int)@event.GetY()) &&
Math.Abs(mInitialY - @event.GetY()) > mViewDragHelper.TouchSlop;
Debug.WriteLineIf(DebugTrace, $"OnInterceptTouchEvent: return {result}");
return(result);
}
public override bool OnInterceptTouchEvent(CoordinatorLayout parent, Java.Lang.Object cChild, MotionEvent ev)
{
var child = cChild.JavaCast <View>();
if (!child.IsShown)
{
_ignoreEvents = true;
return(false);
}
var action = ev.ActionMasked;
if (action == MotionEventActions.Down)
{
Reset();
}
switch (action)
{
case MotionEventActions.Up:
case MotionEventActions.Cancel:
_touchingScrollingChild = false;
_activePointerId = MotionEvent.InvalidPointerId;
// Reset the ignore flag
if (_ignoreEvents)
{
_ignoreEvents = false;
return(false);
}
break;
case MotionEventActions.Down:
_scrollVelocityTracker.Clear();
int initialX = (int)ev.GetX();
_initialY = (int)ev.GetY();
if (_state == StateAnchorPoint)
{
_activePointerId = ev.GetPointerId(ev.ActionIndex);
_touchingScrollingChild = true;
}
else
{
_nestedScrollingChildRef.TryGetTarget(out View scroll);
if (scroll != null && parent.IsPointInChildBounds(scroll, initialX, _initialY))
{
_activePointerId = ev.GetPointerId(ev.ActionIndex);
_touchingScrollingChild = true;
}
}
_ignoreEvents = _activePointerId == MotionEvent.InvalidPointerId &&
!parent.IsPointInChildBounds(child, initialX, _initialY);
break;
case MotionEventActions.Move:
break;
}
if (!_ignoreEvents && _viewDragHelper.ShouldInterceptTouchEvent(ev))
{
return(true);
}
// We have to handle cases that the ViewDragHelper does not capture the bottom sheet because
// it is not the top most view of its parent. This is not necessary when the touch event is
// happening over the scrolling content as nested scrolling logic handles that case.
_nestedScrollingChildRef.TryGetTarget(out View scroll1);
return(action == MotionEventActions.Move && scroll1 != null &&
!_ignoreEvents && _state != StateDragging &&
!parent.IsPointInChildBounds(scroll1, (int)ev.GetX(), (int)ev.GetY()) &&
System.Math.Abs(_initialY - ev.GetY()) > _viewDragHelper.TouchSlop);
}
