protected override void OnAttached()
{
// Gesture touches
gesture = new GestureTouchSam(this, null, View);
View.TouchDelegate = gesture;
View.Clickable = true;
View.LongClickable = true;
View.SoundEffectsEnabled = true;
// Animation tap
overlayAnimation = new FrameLayout(Container.Context)
{
LayoutParameters = new ViewGroup.LayoutParams(-1, -1),
Clickable = false,
Focusable = false,
};
Container.AddView(overlayAnimation);
Container.LayoutChange += OnViewLayoutChanged;
overlayAnimation.BringToFront();
if (IsSdk21)
{
tapColor = Touch.GetColor(Element).ToAndroid();
overlayAnimation.Background = CreateRipple(tapColor);
}
// Updates
UpdateAnimationColor();
UpdateLongTapCommand();
UpdateLongTapLatency();
}
protected override void OnDetached()
{
if (IsDisposed)
{
return;
}
Container.RemoveView(overlayAnimation);
Container.LayoutChange -= OnViewLayoutChanged;
overlayAnimation.Pressed = false;
overlayAnimation.Foreground = null;
overlayAnimation.Dispose();
TimerDispose();
if (IsSdk21)
{
ripple?.Dispose();
}
gesture.Dispose();
gesture = null;
}
internal GView(View view, GestureTouchSam gesture)
{
View = view;
Gesture = gesture;
}
public override bool OnTouchEvent(MotionEvent e)
{
float x = e.RawX;
float y = e.RawY;
float internalX = e.GetX();
float internalY = e.GetY();
host.currentX = x;
host.currentY = y;
// Detect nestered gesture
if (nestedGesture != null)
{
nestedGesture.OnTouchEvent(e);
// Detect END for nestered gesture
if (e.Action == MotionEventActions.Cancel || e.Action == MotionEventActions.Up)
{
nestedGesture = null;
}
return(true);
}
// START
if (e.Action == MotionEventActions.Down)
{
if (!host.IsEnabled || isGestureProcessed)
{
return(true);
}
// Detect nested TouchSam gestures
var childs = host.GetNestedTouchs(view);
foreach (var item in childs)
{
if (host.IsViewInBounds(item.View, (int)x, (int)y))
{
nestedGesture = item.Gesture;
nestedGesture.OnTouchEvent(e);
return(true);
}
}
isGestureProcessed = true;
host.startX = x;
host.startY = y;
host.StartTap();
host.AnimationStart(internalX, internalY);
// Try start long tap timer
if (Touch.GetLongTap(host.Element) != null)
{
host.timer?.Stop();
host.timer?.Start();
}
}
// MOVE
else if (e.Action == MotionEventActions.Move || e.Action == MotionEventActions.Scroll)
{
if (!isGestureProcessed)
{
return(true);
}
float deltaX = Math.Abs(host.startX - x);
float deltaY = Math.Abs(host.startY - y);
if (deltaX > touchSlop || deltaY > touchSlop || !host.IsEnabled)
{
host.FinishTap();
host.AnimationEnd();
host.timer?.Stop();
isGestureProcessed = false;
}
}
// UP
else if (e.Action == MotionEventActions.Up || e.Action == MotionEventActions.Cancel)
{
if (host.IsDisposed || !isGestureProcessed)
{
return(true);
}
isGestureProcessed = false;
host.AnimationEnd();
host.FinishTap();
if (e.Action == MotionEventActions.Up && host.IsEnabled)
{
// Tap sound :)
view.PlaySoundEffect(SoundEffects.Click);
if (host.IsViewInBounds(view, (int)e.RawX, (int)e.RawY))
{
if (Touch.GetLongTap(host.Element) == null)
{
host.Tap();
}
else if (host.timer == null || host.timer.Enabled)
{
host.Tap();
}
}
}
host.timer?.Stop();
}
return(true);
}
public static void Preserve()
{
Touch.Preserve();
GestureTouchSam.Preserve();
GView.Preserve();
}
public static void Init()
{
GestureTouchSam.Preserve();
GView.Preserve();
}
