public override bool DispatchTouchEvent(MotionEvent e)
{
if (e.Action == MotionEventActions.Down)
{
_downTime = DateTime.UtcNow;
_downPosition = new Point(e.RawX, e.RawY);
}
if (e.Action != MotionEventActions.Up)
{
return(base.DispatchTouchEvent(e));
}
global::Android.Views.View currentView = Context.GetActivity().CurrentFocus;
bool result = base.DispatchTouchEvent(e);
do
{
if (!(currentView is EditText))
{
break;
}
global::Android.Views.View newCurrentView = Context.GetActivity().CurrentFocus;
if (currentView != newCurrentView)
{
break;
}
double distance = _downPosition.Distance(new Point(e.RawX, e.RawY));
if (distance > Context.ToPixels(20) || DateTime.UtcNow - _downTime > TimeSpan.FromMilliseconds(200))
{
break;
}
var location = new int[2];
currentView.GetLocationOnScreen(location);
float x = e.RawX + currentView.Left - location[0];
float y = e.RawY + currentView.Top - location[1];
var rect = new Rectangle(currentView.Left, currentView.Top, currentView.Width, currentView.Height);
if (rect.Contains(x, y))
{
break;
}
Context.HideKeyboard(currentView);
Context.GetActivity().Window.DecorView.ClearFocus();
} while (false);
return(result);
}
void CheckForBoundaryHop(int id, Point pointerLocation)
{
TouchEffect touchEffectHit = null;
foreach (global::Android.Views.View view in viewDictionary.Keys)
{
// Get the view rectangle
try
{
view.GetLocationOnScreen(twoIntArray);
}
catch // System.ObjectDisposedException: Cannot access a disposed object.
{
continue;
}
Rectangle viewRect = new Rectangle(twoIntArray[0], twoIntArray[1], view.Width, view.Height);
if (viewRect.Contains(pointerLocation))
{
touchEffectHit = viewDictionary[view];
}
}
if (touchEffectHit != idToEffectDictionary[id])
{
if (idToEffectDictionary[id] != null)
{
FireEvent(idToEffectDictionary[id], id, TouchActionType.Exited, pointerLocation, true);
}
if (touchEffectHit != null)
{
FireEvent(touchEffectHit, id, TouchActionType.Entered, pointerLocation, true);
}
idToEffectDictionary[id] = touchEffectHit;
}
}
void OnTouch(object sender, global::Android.Views.View.TouchEventArgs args)
{
// Two object common to all the events
global::Android.Views.View senderView = sender as global::Android.Views.View;
MotionEvent motionEvent = args.Event;
// Get the pointer index
int pointerIndex = motionEvent.ActionIndex;
// Get the id that identifies a finger over the course of its progress
int id = motionEvent.GetPointerId(pointerIndex);
senderView.GetLocationOnScreen(twoIntArray);
Point screenPointerCoords = new Point(twoIntArray[0] + motionEvent.GetX(pointerIndex),
twoIntArray[1] + motionEvent.GetY(pointerIndex));
// Use ActionMasked here rather than Action to reduce the number of possibilities
switch (args.Event.ActionMasked)
{
case MotionEventActions.Down:
case MotionEventActions.PointerDown:
FireEvent(this, id, TouchActionType.Pressed, screenPointerCoords, true);
idToEffectDictionary.Add(id, this);
capture = libTouchEffect.Capture;
break;
case MotionEventActions.Move:
// Multiple Move events are bundled, so handle them in a loop
for (pointerIndex = 0; pointerIndex < motionEvent.PointerCount; pointerIndex++)
{
id = motionEvent.GetPointerId(pointerIndex);
if (capture)
{
senderView.GetLocationOnScreen(twoIntArray);
screenPointerCoords = new Point(twoIntArray[0] + motionEvent.GetX(pointerIndex),
twoIntArray[1] + motionEvent.GetY(pointerIndex));
FireEvent(this, id, TouchActionType.Moved, screenPointerCoords, true);
}
else
{
CheckForBoundaryHop(id, screenPointerCoords);
if (idToEffectDictionary[id] != null)
{
FireEvent(idToEffectDictionary[id], id, TouchActionType.Moved, screenPointerCoords, true);
}
}
}
break;
case MotionEventActions.Up:
case MotionEventActions.Pointer1Up:
if (capture)
{
FireEvent(this, id, TouchActionType.Released, screenPointerCoords, false);
}
else
{
CheckForBoundaryHop(id, screenPointerCoords);
if (idToEffectDictionary[id] != null)
{
FireEvent(idToEffectDictionary[id], id, TouchActionType.Released, screenPointerCoords, false);
}
}
idToEffectDictionary.Remove(id);
break;
case MotionEventActions.Cancel:
if (capture)
{
FireEvent(this, id, TouchActionType.Cancelled, screenPointerCoords, false);
}
else
{
if (idToEffectDictionary[id] != null)
{
FireEvent(idToEffectDictionary[id], id, TouchActionType.Cancelled, screenPointerCoords, false);
}
}
idToEffectDictionary.Remove(id);
break;
}
}
