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using System;
using System.ComponentModel;
using Android.Views;
using Xamarin.Forms.Internals;
using AView = Android.Views.View;
using Object = Java.Lang.Object;
namespace Xamarin.Forms.Platform.Android.FastRenderers
{
// TODO hartez 2017/03/03 14:11:17 It's weird that this class is called VisualElementRenderer but it doesn't implement that interface. The name should probably be different.
public class VisualElementRenderer : IDisposable, IEffectControlProvider
{
bool _disposed;
IVisualElementRenderer _renderer;
readonly GestureManager _gestureManager;
readonly AutomationPropertiesProvider _automatiomPropertiesProvider;
readonly EffectControlProvider _effectControlProvider;
public VisualElementRenderer(IVisualElementRenderer renderer)
{
_renderer = renderer;
_renderer.ElementPropertyChanged += OnElementPropertyChanged;
_renderer.ElementChanged += OnElementChanged;
_gestureManager = new GestureManager(_renderer);
_automatiomPropertiesProvider = new AutomationPropertiesProvider(_renderer);
_effectControlProvider = new EffectControlProvider(_renderer?.View);
}
VisualElement Element => _renderer?.Element;
AView Control => _renderer?.View;
void IEffectControlProvider.RegisterEffect(Effect effect)
{
_effectControlProvider.RegisterEffect(effect);
}
public void UpdateBackgroundColor(Color? color = null)
{
if (_disposed || Element == null || Control == null)
return;
Control.SetBackgroundColor((color ?? Element.BackgroundColor).ToAndroid());
}
public bool OnTouchEvent(MotionEvent e, IViewParent parent, out bool handled)
{
return _gestureManager.OnTouchEvent(e, parent, out handled);
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected void Dispose(bool disposing)
{
if (_disposed)
return;
_disposed = true;
if (disposing)
{
_gestureManager?.Dispose();
_automatiomPropertiesProvider?.Dispose();
if (_renderer != null)
{
_renderer.ElementChanged -= OnElementChanged;
_renderer.ElementPropertyChanged -= OnElementPropertyChanged;
_renderer = null;
}
}
}
void OnElementChanged(object sender, VisualElementChangedEventArgs e)
{
if (e.OldElement != null)
{
e.OldElement.PropertyChanged -= OnElementPropertyChanged;
}
if (e.NewElement != null)
{
e.NewElement.PropertyChanged += OnElementPropertyChanged;
UpdateBackgroundColor();
}
EffectUtilities.RegisterEffectControlProvider(this, e.OldElement, e.NewElement);
}
void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == VisualElement.BackgroundColorProperty.PropertyName)
UpdateBackgroundColor();
}
}
}
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