protected virtual void UpdateImageLoadingTask() { var ffSource = GetImageSourceBinding(ImagePath, ImageStream); var placeholderSource = GetImageSourceBinding(LoadingPlaceholderImagePath, null); Cancel(); TaskParameter imageLoader = null; if (ffSource == null) { _internalImage.Source = null; IsLoading = false; return; } IsLoading = true; if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Url) { imageLoader = ImageService.Instance.LoadUrl(ffSource.Path, CacheDuration); } else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.CompiledResource) { imageLoader = ImageService.Instance.LoadCompiledResource(ffSource.Path); } else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.ApplicationBundle) { imageLoader = ImageService.Instance.LoadFileFromApplicationBundle(ffSource.Path); } else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Filepath) { imageLoader = ImageService.Instance.LoadFile(ffSource.Path); } else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Stream) { imageLoader = ImageService.Instance.LoadStream(ffSource.Stream); } else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.EmbeddedResource) { imageLoader = ImageService.Instance.LoadEmbeddedResource(ffSource.Path); } if (imageLoader != null) { // LoadingPlaceholder if (placeholderSource != null) { if (placeholderSource != null) { imageLoader.LoadingPlaceholder(placeholderSource.Path, placeholderSource.ImageSource); } } // ErrorPlaceholder if (!string.IsNullOrWhiteSpace(ErrorPlaceholderImagePath)) { var errorPlaceholderSource = GetImageSourceBinding(ErrorPlaceholderImagePath, null); if (errorPlaceholderSource != null) { imageLoader.ErrorPlaceholder(errorPlaceholderSource.Path, errorPlaceholderSource.ImageSource); } } if (CustomDataResolver != null) { imageLoader.WithCustomDataResolver(CustomDataResolver); imageLoader.WithCustomLoadingPlaceholderDataResolver(CustomLoadingPlaceholderDataResolver); imageLoader.WithCustomErrorPlaceholderDataResolver(CustomErrorPlaceholderDataResolver); } // Downsample if ((int)DownsampleHeight != 0 || (int)DownsampleWidth != 0) { if (DownsampleUseDipUnits) { imageLoader.DownSampleInDip((int)DownsampleWidth, (int)DownsampleHeight); } else { imageLoader.DownSample((int)DownsampleWidth, (int)DownsampleHeight); } } // RetryCount if (RetryCount > 0) { imageLoader.Retry(RetryCount, RetryDelay); } if (BitmapOptimizations.HasValue) { imageLoader.BitmapOptimizations(BitmapOptimizations.Value); } // FadeAnimation if (FadeAnimationEnabled.HasValue) { imageLoader.FadeAnimation(FadeAnimationEnabled.Value, duration: FadeAnimationDuration); } // FadeAnimationForCachedImages if (FadeAnimationEnabled.HasValue && FadeAnimationForCachedImages.HasValue) { imageLoader.FadeAnimation(FadeAnimationEnabled.Value, FadeAnimationForCachedImages.Value, FadeAnimationDuration); } // TransformPlaceholders if (TransformPlaceholders.HasValue) { imageLoader.TransformPlaceholders(TransformPlaceholders.Value); } // Transformations if (Transformations != null && Transformations.Count > 0) { imageLoader.Transform(Transformations); } if (InvalidateLayoutAfterLoaded.HasValue) { imageLoader.InvalidateLayout(InvalidateLayoutAfterLoaded.Value); } imageLoader.WithPriority(LoadingPriority); if (CacheType.HasValue) { imageLoader.WithCache(CacheType.Value); } if (LoadingDelay > 0) { imageLoader.Delay(LoadingDelay); } imageLoader.Finish((work) => { IsLoading = false; OnFinish?.Invoke(this, new Args.FinishEventArgs(work)); }); imageLoader.Success((imageInformation, loadingResult) => { OnSuccess?.Invoke(this, new Args.SuccessEventArgs(imageInformation, loadingResult)); _lastImageSource = ffSource; }); if (OnError != null) { imageLoader.Error((ex) => OnError?.Invoke(this, new Args.ErrorEventArgs(ex))); } if (OnDownloadStarted != null) { imageLoader.DownloadStarted((downloadInformation) => OnDownloadStarted(this, new Args.DownloadStartedEventArgs(downloadInformation))); } if (OnDownloadProgress != null) { imageLoader.DownloadProgress((progress) => OnDownloadProgress(this, new Args.DownloadProgressEventArgs(progress))); } if (OnFileWriteFinished != null) { imageLoader.FileWriteFinished((info) => OnFileWriteFinished(this, new Args.FileWriteFinishedEventArgs(info))); } if (!string.IsNullOrWhiteSpace(CustomCacheKey)) { imageLoader.CacheKey(CustomCacheKey); } SetupOnBeforeImageLoading(imageLoader); _scheduledWork = imageLoader.Into(_internalImage); } }