protected override void OnAttached()
{
// Get the Android View corresponding to the Element that the effect is attached to
view = Control ?? Container;
// Get access to the TouchEffect class in the PCL
var touchEffect =
(SkiaUtil.Core.TouchTracking.TouchEffect)Element.Effects.
FirstOrDefault(e => e is SkiaUtil.Core.TouchTracking.TouchEffect);
if (touchEffect != null && view != null)
{
viewDictionary.Add(view, this);
formsElement = Element;
pclTouchEffect = touchEffect;
// Save fromPixels function
fromPixels = view.Context.FromPixels;
// Set event handler on View
view.Touch += OnTouch;
}
}
void SetContentView(global::Android.Views.View view, global::Android.Views.ViewGroup.LayoutParams @params, global::Xamarin.Android.Design.OnLayoutItemNotFoundHandler onLayoutItemNotFound)
{
__layout_binding = new global::Binding.ActivitySub(view, onLayoutItemNotFound);
bool callBase = true;
OnSetContentView(view, @params, ref callBase);
if (callBase)
{
base.SetContentView(view, @params);
}
}
public override void SetContentView(global::Android.Views.View view, global::Android.Views.ViewGroup.LayoutParams @params)
{
__layout_binding = new global::Binding.ActivitySub(view);
bool callBase = true;
OnSetContentView(view, @params, ref callBase);
if (callBase)
{
base.SetContentView(view, @params);
}
}
public ActivitySub(
global::Android.Views.View client,
global::Xamarin.Android.Design.OnLayoutItemNotFoundHandler itemNotFoundHandler = null)
: base(client, itemNotFoundHandler)
{
}
partial void OnSetContentView(global::Android.Views.View view, global::Android.Views.ViewGroup.LayoutParams @params, ref bool callBaseAfterReturn);
partial void OnSetContentView(global::Android.Views.View view, ref bool callBaseAfterReturn);
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);
if (!idToEffectDictionary.ContainsKey(id))
{
idToEffectDictionary.Add(id, this);
}
capture = pclTouchEffect.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;
}
}
