// TODO hartez 2017/04/07 09:33:03 Review this again, not sure it's handling the transition from previousImage to 'null' newImage correctly
static async Task UpdateBitmap(
this AImageView imageView,
IImageElement newView,
IImageElement previousView,
ImageSource newImageSource,
ImageSource previousImageSource)
{
IImageController imageController = newView as IImageController;
newImageSource = newView?.Source;
previousImageSource = previousView?.Source;
if (newImageSource == null || imageView.IsDisposed())
{
return;
}
if (Equals(previousImageSource, newImageSource))
{
return;
}
imageController?.SetIsLoading(true);
(imageView as IImageRendererController)?.SkipInvalidate();
imageView.SetImageResource(global::Android.Resource.Color.Transparent);
bool setByImageViewHandler = false;
Bitmap bitmap = null;
try
{
if (newImageSource != null)
{
var imageViewHandler = Internals.Registrar.Registered.GetHandlerForObject <IImageViewHandler>(newImageSource);
if (imageViewHandler != null)
{
await imageViewHandler.LoadImageAsync(newImageSource, imageView);
setByImageViewHandler = true;
}
else
{
var imageSourceHandler = Internals.Registrar.Registered.GetHandlerForObject <IImageSourceHandler>(newImageSource);
bitmap = await imageSourceHandler.LoadImageAsync(newImageSource, imageView.Context);
}
}
}
catch (TaskCanceledException)
{
imageController?.SetIsLoading(false);
}
// Check if the source on the new image has changed since the image was loaded
if (!Equals(newView?.Source, newImageSource))
{
bitmap?.Dispose();
return;
}
if (!setByImageViewHandler && !imageView.IsDisposed())
{
if (bitmap == null && newImageSource is FileImageSource)
{
imageView.SetImageResource(ResourceManager.GetDrawableByName(((FileImageSource)newImageSource).File));
}
else
{
imageView.SetImageBitmap(bitmap);
}
}
bitmap?.Dispose();
imageController?.SetIsLoading(false);
}
