public static async Task UpdateSource(IImageVisualElementRenderer renderer)
{
var Element = renderer.Element;
var Control = renderer.GetNativeElement();
var imageElement = Element as IImageElement;
if (renderer.IsDisposed || Element == null || Control == null)
{
return;
}
ImageSource placeholderError = null;
if (imageElement is Image img)
{
placeholderError = img.ErrorPlaceholder;
var source = await img.LoadingPlaceholder.ToWindowsImageSourceAsync();
renderer.SetImage(source);
}
var imageController = Element as IImageController;
imageController?.SetIsLoading(true);
try
{
var imagesource = await imageElement.Source.ToWindowsImageSourceAsync();
if (renderer.IsDisposed)
{
return;
}
if (imagesource is BitmapImage bitmapImage && _nativeAnimationSupport)
{
bitmapImage.AutoPlay = false;
}
if (Control != null)
{
renderer.SetImage(imagesource);
}
RefreshImage(renderer);
// The ImageFailed event don't trigger when the local ImageSource is invalid, so we need to check the size.
var size = renderer.GetDesiredSize(double.PositiveInfinity, double.PositiveInfinity);
if (size.Request.IsZero && imageElement is Image)
{
imagesource = await placeholderError.ToWindowsImageSourceAsync();
renderer.SetImage(imagesource);
}
}
finally
{
imageController?.SetIsLoading(false);
}
}
public static async Task UpdateSource(IImageVisualElementRenderer renderer)
{
var Element = renderer.Element;
var Control = renderer.GetNativeElement();
var imageElement = Element as IImageElement;
if (renderer.IsDisposed || Element == null || Control == null)
{
return;
}
if (imageElement is Image img)
{
var source = await img.LoadingPlaceholder.ToWindowsImageSourceAsync();
renderer.SetImage(source);
}
var imageController = Element as IImageController;
imageController?.SetIsLoading(true);
try
{
// If it's a url image source and ToWindowsImageSourceAsync returns null, that was an error
var imagesource = await imageElement.Source.ToWindowsImageSourceAsync();
if (imageElement.Source is UriImageSource && imagesource == null)
{
await DisplayErrorImage(renderer);
return;
}
if (renderer.IsDisposed)
{
return;
}
if (imagesource is BitmapImage bitmapImage && _nativeAnimationSupport)
{
bitmapImage.AutoPlay = false;
}
if (Control != null)
{
renderer.SetImage(imagesource);
}
RefreshImage(renderer);
}
finally
{
imageController?.SetIsLoading(false);
}
}
public static async Task UpdateSource(IImageVisualElementRenderer renderer)
{
var Element = renderer.Element;
var Control = renderer.GetNativeElement();
var imageElement = Element as IImageElement;
if (renderer.IsDisposed || Element == null || Control == null)
{
return;
}
var imageController = Element as IImageController;
imageController?.SetIsLoading(true);
ImageSource source = imageElement.Source;
IImageSourceHandler handler;
if (source != null && (handler = Registrar.Registered.GetHandlerForObject <IImageSourceHandler>(source)) != null)
{
Windows.UI.Xaml.Media.ImageSource imagesource;
try
{
imagesource = await handler.LoadImageAsync(source);
}
catch (OperationCanceledException)
{
imagesource = null;
}
// In the time it takes to await the imagesource, some zippy little app
// might have disposed of this Image already.
if (Control != null)
{
renderer.SetImage(imagesource);
}
RefreshImage(imageElement as IViewController);
}
else
{
renderer.SetImage(null);
imageController?.SetIsLoading(false);
}
}
public static async Task UpdateSource(IImageVisualElementRenderer renderer)
{
var Element = renderer.Element;
var Control = renderer.GetNativeElement();
var imageElement = Element as IImageElement;
if (renderer.IsDisposed || Element == null || Control == null)
{
return;
}
var imageController = Element as IImageController;
imageController?.SetIsLoading(true);
try
{
var imagesource = await imageElement.Source.ToWindowsImageSourceAsync();
if (renderer.IsDisposed)
{
return;
}
if (imagesource is BitmapImage bitmapImage && _nativeAnimationSupport)
{
bitmapImage.AutoPlay = false;
}
if (Control != null)
{
renderer.SetImage(imagesource);
}
RefreshImage(renderer);
}
finally
{
imageController?.SetIsLoading(false);
}
}
public static void UpdateAspect(IImageVisualElementRenderer renderer, IImageElement controller)
{
var Element = renderer.Element;
var Control = renderer.GetNativeElement();
var image = renderer.GetImage();
if (renderer.IsDisposed || Element == null || Control == null)
{
return;
}
image.Stretch = GetStretch(controller.Aspect);
if (controller.Aspect == Aspect.AspectFill || controller.Aspect == Aspect.AspectFit)
{
image.HorizontalAlignment = HorizontalAlignment.Center;
image.VerticalAlignment = VerticalAlignment.Center;
}
else
{
image.HorizontalAlignment = HorizontalAlignment.Left;
image.VerticalAlignment = VerticalAlignment.Top;
}
}
