/// <summary>
/// Invoked when bitmap's Source property is changed.
/// </summary>
/// <param name="dependencyObject">Dependency object - bitmap.</param>
/// <param name="eventArgs">Event data.</param>
private static void _OnSourceChanged(DependencyObject dependencyObject,
DependencyPropertyChangedEventArgs eventArgs)
{
// Get bitmap.
BitmapUIElement bitmap = (BitmapUIElement)dependencyObject;
// Get old bitmap source value.
BitmapSource oldBitmapSourceValue = (BitmapSource)eventArgs.OldValue;
// Get new bitmap source value.
BitmapSource newBitmapSourceValue = (BitmapSource)eventArgs.NewValue;
// Unsubscribe from events for old bitmap source value.
if (oldBitmapSourceValue != null &&
!oldBitmapSourceValue.IsFrozen)
{
oldBitmapSourceValue.DownloadCompleted -= bitmap._OnBitmapSourceDownloadCompleted;
oldBitmapSourceValue.DownloadFailed -= bitmap._OnBitmapSourceDownloadFailed;
}
// Subscribe to events for the new bitmap source value.
if (newBitmapSourceValue != null && !newBitmapSourceValue.IsFrozen)
{
newBitmapSourceValue.DownloadCompleted += bitmap._OnBitmapSourceDownloadCompleted;
newBitmapSourceValue.DownloadFailed += bitmap._OnBitmapSourceDownloadFailed;
}
}
/// <summary>
/// Initializes a new instance of <c>SmartBitmap</c>.
/// </summary>
public SmartBitmap()
{
_bitmapUIElement = new BitmapUIElement();
AddVisualChild(_bitmapUIElement);
}
/// <summary>
/// Initializes a new instance of <c>SmartBitmap</c>.
/// </summary>
public SmartBitmap()
{
_bitmapUIElement = new BitmapUIElement();
AddVisualChild(_bitmapUIElement);
}
