/// <summary>
/// Handler for PrintableStoryImageControl's GetImageSourceCompleted event.
/// </summary>
private void GetImageSourceCompleted(object sender, GetImageSourceCompletedEventArgs e)
{
if (e.UserState == _targetDocument)
{
OnGetImageSourceCompleted(sender, e);
}
}
/// <summary>
/// Called when image download has been completed (successfully or not).
/// </summary>
/// <param name="sender">Source of the event</param>
/// <param name="e">Provides detailed information about download completion.</param>
private void OnGetImageSourceCompleted(object sender, GetImageSourceCompletedEventArgs e)
{
_isImageDownloadInProgress = false;
if (Object.ReferenceEquals(e.UserState, this))
{
if (e.Error == null && !e.Cancelled)
{
SetValue(ImageSourcePropertyKey, e.ImageSource);
}
else
{
SetValue(ImageSourcePropertyKey, null);
}
}
}
private void _OnGetImageSourceCompleted(object sender, GetImageSourceCompletedEventArgs e)
{
var senderImage = (FacebookImage)sender;
if (!object.ReferenceEquals(senderImage, this.FacebookImage))
{
// Getting a stale callback for a different object. Ignore it.
return;
}
if (e.Error != null || e.Cancelled)
{
ImageSource = null;
IsImageUpdating = false;
return;
}
ImageSource = e.ImageSource;
IsImageUpdating = false;
}
/// <summary>
/// When a request for image source completes, remove the requesting ImageControl from the list of pending request states.
/// If all pending requests have been completed, raise conversion completed event
/// </summary>
protected virtual void OnGetImageSourceCompleted(object sender, GetImageSourceCompletedEventArgs e)
{
if (sender is PrintableStoryImageControl)
{
PrintableStoryImageControl imageControl = (PrintableStoryImageControl)sender;
if (_pendingImageRequestStates.Contains(imageControl))
{
_pendingImageRequestStates.Remove(imageControl);
}
imageControl.GetImageSourceCompleted -= GetImageSourceCompleted;
}
if (_pendingImageRequestStates.Count == 0)
{
// _userState is the target document
ConversionCompletedEventArgs args = new ConversionCompletedEventArgs(_requestedUserState, _targetDocument);
_dispatcher.BeginInvoke(DispatcherPriority.Input, new DispatcherOperationCallback(RaiseConversionCompleted), args);
_requestedUserState = null;
}
}
private void _OnGetImageSourceCompleted(object sender, GetImageSourceCompletedEventArgs e)
{
if (sender != FacebookImage)
{
return;
}
if (e.Error == null && !e.Cancelled)
{
this.ImageSource = e.ImageSource;
if (SizeToContent != SizeToContent.Manual)
{
// Not bothering to detect more granular values for SizeToContent.
SetValue(WidthProperty, e.NaturalSize.Value.Width);
SetValue(HeightProperty, e.NaturalSize.Value.Height);
}
}
else
{
this.ImageSource = null;
}
this.InvalidateVisual();
}
