protected override void OnAttached()
{
if (View == null)
{
return;
}
effect = TouchEffect.PickFrom(Element);
if (effect?.IsDisabled ?? true)
{
return;
}
effect.Element = (VisualElement)Element;
View.Touch += OnTouch;
UpdateClickHandler();
accessibilityManager = View.Context.GetSystemService(Context.AccessibilityService) as AccessibilityManager;
if (accessibilityManager != null)
{
accessibilityListener = new AccessibilityListener(this);
accessibilityManager.AddAccessibilityStateChangeListener(accessibilityListener);
accessibilityManager.AddTouchExplorationStateChangeListener(accessibilityListener);
}
if (Build.VERSION.SdkInt < BuildVersionCodes.Lollipop || !effect.NativeAnimation)
{
return;
}
View.Clickable = true;
View.LongClickable = true;
CreateRipple();
if (Group == null)
{
if (Build.VERSION.SdkInt >= BuildVersionCodes.M)
{
View.Foreground = ripple;
}
return;
}
rippleView = new FrameLayout(Group.Context)
{
LayoutParameters = new ViewGroup.LayoutParams(-1, -1),
Clickable = false,
Focusable = false,
Enabled = false,
};
View.LayoutChange += OnLayoutChange;
rippleView.Background = ripple;
Group.AddView(rippleView);
rippleView.BringToFront();
}
protected override void OnDetached()
{
if (effect?.Element == null)
{
return;
}
try
{
if (accessibilityManager != null)
{
accessibilityManager.RemoveAccessibilityStateChangeListener(accessibilityListener);
accessibilityManager.RemoveTouchExplorationStateChangeListener(accessibilityListener);
accessibilityListener.Dispose();
accessibilityManager = null;
accessibilityListener = null;
}
if (View != null)
{
View.LayoutChange -= OnLayoutChange;
View.Touch -= OnTouch;
View.Click -= OnClick;
if (Build.VERSION.SdkInt >= BuildVersionCodes.M && View.Foreground == ripple)
{
View.Foreground = null;
}
}
effect.Element = null;
effect = null;
if (rippleView != null)
{
rippleView.Pressed = false;
rippleView.Background = null;
Group?.RemoveView(rippleView);
rippleView.Dispose();
rippleView = null;
}
ripple?.Dispose();
ripple = null;
}
catch (ObjectDisposedException)
{
// Suppress exception
}
isHoverSupported = false;
}
protected override void OnAttached()
{
if (View == null)
{
return;
}
_effect = Element.PickTouchEff();
if (_effect?.IsDisabled ?? true)
{
return;
}
_effect.Control = Element as VisualElement;
View.Touch += OnTouch;
UpdateClickHandler();
_accessibilityManager = View.Context.GetSystemService(Context.AccessibilityService) as AccessibilityManager;
if (_accessibilityManager != null)
{
_accessibilityListener = new AccessibilityListener(this);
_accessibilityManager.AddAccessibilityStateChangeListener(_accessibilityListener);
_accessibilityManager.AddTouchExplorationStateChangeListener(_accessibilityListener);
}
if (_effect.NativeAnimation && Group != null && AndroidOS.Build.VERSION.SdkInt >= AndroidOS.BuildVersionCodes.Lollipop)
{
View.Clickable = true;
View.LongClickable = true;
_viewOverlay = new FrameLayout(Group.Context)
{
LayoutParameters = new ViewGroup.LayoutParams(-1, -1),
Clickable = false,
Focusable = false,
};
View.LayoutChange += LayoutChange;
CreateRipple();
_viewOverlay.Background = _ripple;
Group.AddView(_viewOverlay);
_viewOverlay.BringToFront();
}
}
