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using System.ComponentModel;
using Android.Views;
namespace Xamarin.Forms.Platform.Android
{
public class PageRenderer : VisualElementRenderer<Page>
{
public override bool OnTouchEvent(MotionEvent e)
{
base.OnTouchEvent(e);
return true;
}
IPageController PageController => Element as IPageController;
protected override void Dispose(bool disposing)
{
PageController?.SendDisappearing();
base.Dispose(disposing);
}
protected override void OnAttachedToWindow()
{
base.OnAttachedToWindow();
var pageContainer = Parent as PageContainer;
if (pageContainer != null && pageContainer.IsInFragment)
return;
PageController.SendAppearing();
}
protected override void OnDetachedFromWindow()
{
base.OnDetachedFromWindow();
var pageContainer = Parent as PageContainer;
if (pageContainer != null && pageContainer.IsInFragment)
return;
PageController.SendDisappearing();
}
protected override void OnElementChanged(ElementChangedEventArgs<Page> e)
{
Page view = e.NewElement;
base.OnElementChanged(e);
UpdateBackgroundColor(view);
UpdateBackgroundImage(view);
Clickable = true;
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == Page.BackgroundImageProperty.PropertyName)
UpdateBackgroundImage(Element);
if (e.PropertyName == VisualElement.BackgroundColorProperty.PropertyName)
UpdateBackgroundColor(Element);
}
void UpdateBackgroundColor(Page view)
{
if (view.BackgroundColor != Color.Default)
SetBackgroundColor(view.BackgroundColor.ToAndroid());
}
void UpdateBackgroundImage(Page view)
{
if (!string.IsNullOrEmpty(view.BackgroundImage))
this.SetBackground(Context.Resources.GetDrawable(view.BackgroundImage));
}
}
}
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