public override void Set(ImageLoaderTask task, UIImage image, bool isLocalOrFromCache, bool isLoadingPlaceholder)
{
var control = Control;
if (control == null)
{
return;
}
var parameters = task.Parameters;
bool isFadeAnimationEnabled = parameters.FadeAnimationEnabled ?? ImageService.Instance.Config.FadeAnimationEnabled;
bool isFadeAnimationEnabledForCached = isFadeAnimationEnabled && (parameters.FadeAnimationForCachedImages ?? ImageService.Instance.Config.FadeAnimationForCachedImages);
if (!isLoadingPlaceholder && isFadeAnimationEnabled && (!isLocalOrFromCache || (isLocalOrFromCache && isFadeAnimationEnabledForCached)))
{
// fade animation
double fadeDuration = (double)((parameters.FadeAnimationDuration.HasValue ?
parameters.FadeAnimationDuration.Value : ImageService.Instance.Config.FadeAnimationDuration)) / 1000;
UIView.Transition(control, fadeDuration,
UIViewAnimationOptions.TransitionCrossDissolve
| UIViewAnimationOptions.BeginFromCurrentState,
() => { control.Image = image; },
() => { });
}
else
{
control.Image = image;
}
}
private static IScheduledWork Into(this TaskParameter parameters, Func<Image> getNativeControl, Action<WriteableBitmap, bool> doWithImage)
{
var task = new ImageLoaderTask(ImageService.Config.DownloadCache, new MainThreadDispatcher(), ImageService.Config.Logger, parameters,
getNativeControl, doWithImage);
ImageService.LoadImage(task);
return task;
}
public AsyncDrawable(Resources res, Bitmap bitmap, ImageLoaderTask imageLoaderTask)
: base(res, bitmap)
{
if (imageLoaderTask == null)
throw new ArgumentNullException("Parameter 'imageLoaderTask' cannot be null");
_imageLoaderTaskReference = new WeakReference<ImageLoaderTask>(imageLoaderTask);
}
private bool UsesSameNativeControl(ImageLoaderTask task)
{
var currentControl = _getNativeControl();
var control = task._getNativeControl();
if (currentControl == null || control == null || currentControl.Handle == IntPtr.Zero || control.Handle == IntPtr.Zero)
return false;
return currentControl.Handle == control.Handle;
}
public override void Set(ImageLoaderTask task, UIImage image, bool isLocalOrFromCache, bool isLoadingPlaceholder)
{
var control = Control;
if (control == null)
{
return;
}
control.SetImage(image, UIControlState.Normal);
}
private bool UsesSameNativeControl(ImageLoaderTask task)
{
var currentControl = _getNativeControl();
var control = task._getNativeControl();
if (currentControl == null || control == null)
return false;
return currentControl == control;
}
public override void SetAsEmpty(ImageLoaderTask task)
{
var control = Control;
if (control == null)
{
return;
}
control.SetImage(null, UIControlState.Normal);
}
public override void SetAsEmpty(ImageLoaderTask task)
{
var control = Control;
if (control == null)
{
return;
}
control.Image = null;
}
public override void Set(ImageLoaderTask task, UIImage image, bool isLocalOrFromCache, bool isLoadingPlaceholder)
{
var control = Control;
if (control == null)
{
return;
}
control.Image = image;
}
private bool UsesSameNativeControl(ImageLoaderTask task)
{
ImageView currentControl;
_imageWeakReference.TryGetTarget(out currentControl);
ImageView control;
task._imageWeakReference.TryGetTarget(out control);
if (currentControl == null || control == null || currentControl.Handle == IntPtr.Zero || control.Handle == IntPtr.Zero)
return false;
return currentControl.Handle == control.Handle;
}
private bool UsesSameNativeControl(ImageLoaderTask task)
{
var currentControl = _getNativeControl();
var control = task._getNativeControl();
if (currentControl == null || control == null)
{
return(false);
}
return(currentControl == control);
}
private bool UsesSameNativeControl(ImageLoaderTask task)
{
var currentControl = _getNativeControl();
var control = task._getNativeControl();
if (currentControl == null || control == null || currentControl.Handle == IntPtr.Zero || control.Handle == IntPtr.Zero)
{
return(false);
}
return(currentControl.Handle == control.Handle);
}
private bool UsesSameNativeControl(ImageLoaderTask task)
{
ImageView currentControl;
_imageWeakReference.TryGetTarget(out currentControl);
ImageView control;
task._imageWeakReference.TryGetTarget(out control);
if (currentControl == null || control == null || currentControl.Handle == IntPtr.Zero || control.Handle == IntPtr.Zero)
{
return(false);
}
return(currentControl.Handle == control.Handle);
}
public override bool UsesSameNativeControl(ImageLoaderTask task)
{
var otherTarget = task._target as IUIViewTarget <TControl>;
if (otherTarget == null)
{
return(false);
}
var control = Control;
var otherControl = otherTarget.Control;
if (control == null || otherControl == null)
{
return(false);
}
return(control.Handle == otherControl.Handle);
}
public AsyncDrawable(Resources res, Bitmap bitmap, ImageLoaderTask imageLoaderTask)
: base(res, bitmap)
{
_imageLoaderTaskReference = new WeakReference<ImageLoaderTask>(imageLoaderTask);
}
/// <summary>
/// Loads the image into given imageView using defined parameters.
/// </summary>
/// <param name="parameters">Parameters for loading the image.</param>
/// <param name="imageView">Image view that should receive the image.</param>
public static IScheduledWork Into(this TaskParameter parameters, ImageViewAsync imageView)
{
var task = new ImageLoaderTask(ImageService.Config.DownloadCache, new MainThreadDispatcher(), ImageService.Config.Logger, parameters, imageView);
ImageService.LoadImage(task);
return task;
}
private static IScheduledWork Into(this TaskParameter parameters, Func<UIView> getNativeControl, Action<UIImage, bool> doWithImage, float imageScale = -1f)
{
var task = new ImageLoaderTask(ImageService.Config.DownloadCache, new MainThreadDispatcher(), ImageService.Config.Logger, parameters,
getNativeControl, doWithImage, imageScale);
ImageService.LoadImage(task);
return task;
}
/// <summary>
/// Invalidate the image corresponding to given parameters from given caches.
/// </summary>
/// <param name="parameters">Image parameters.</param>
/// <param name="cacheType">Cache type.</param>
public static void Invalidate(this TaskParameter parameters, CacheType cacheType)
{
using (var task = new ImageLoaderTask(ImageService.Config.DownloadCache, new MainThreadDispatcher(), ImageService.Config.Logger, parameters, null, null, 1))
{
var key = task.GetKey();
ImageService.Invalidate(key, cacheType);
}
}
public override bool IsTaskValid(ImageLoaderTask task)
{
return(IsValid);
}
public AsyncDrawable(Resources res, Bitmap bitmap, ImageLoaderTask imageLoaderTask)
: base(res, bitmap)
{
_imageLoaderTaskReference = new WeakReference <ImageLoaderTask>(imageLoaderTask);
}
private static ImageLoaderTask CreateTask(this TaskParameter parameters, ImageViewAsync imageView)
{
var task = new ImageLoaderTask(ImageService.Config.DownloadCache, new MainThreadDispatcher(), ImageService.Config.Logger, parameters, imageView);
return task;
}
