/// <summary>
/// Triggers the transition between visual states.
/// </summary>
/// <param name="obj">The dependency object.</param>
/// <param name="e">The event information.</param>
private static void OnSizeChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
FlipTile flipTile = (FlipTile)obj;
// And now we'll update the width and height to match the new size.
switch (flipTile.Size)
{
case TileSize.Default:
flipTile.Width = 160;
flipTile.Height = 160;
break;
case TileSize.Small:
flipTile.Width = 99;
flipTile.Height = 99;
break;
case TileSize.Medium:
flipTile.Width = 210;
flipTile.Height = 210;
break;
case TileSize.Large:
flipTile.Width = 432;
flipTile.Height = 210;
break;
}
flipTile.SizeChanged += OnFlipTileSizeChanged;
FlipTileService.FinalizeReference(flipTile);
}
/// <summary>
/// Remove all references of a flip tile before finalizing it.
/// </summary>
/// <param name="tile">The flip tile that is to be finalized.</param>
internal static void FinalizeReference(FlipTile tile)
{
WeakReference wref = new WeakReference(tile, TrackResurrection);
FlipTileService.RemoveReferenceFromEnabledPool(wref);
FlipTileService.RemoveReferenceFromFrozenPool(wref);
FlipTileService.RemoveReferenceFromStalledPipeline(wref);
}
/// <summary>
/// Removes the frozen image from the enabled image pool or the stalled image pipeline.
/// Adds the non-frozen image to the enabled image pool.
/// </summary>
/// <param name="obj">The dependency object.</param>
/// <param name="e">The event information.</param>
private static void OnIsFrozenChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
FlipTile tile = (FlipTile)obj;
if ((bool)e.NewValue)
{
FlipTileService.FreezeFlipTile(tile);
}
else
{
FlipTileService.UnfreezeFlipTile(tile);
}
}
static void OnFlipTileSizeChanged(object sender, SizeChangedEventArgs e)
{
FlipTile flipTile = (FlipTile)sender;
flipTile.SizeChanged -= OnFlipTileSizeChanged;
// In order to avoid getting into a bad state, we'll shift the FlipTile
// back to the Expanded state. If we were already in the Expanded state,
// then we'll manually shift the title panel to the right location,
// since the visual state manager won't do it for us in that case.
if (flipTile.State != FlipState.Expanded)
{
flipTile.State = FlipState.Expanded;
VisualStateManager.GoToState(flipTile, Expanded, false);
}
FlipTileService.InitializeReference(flipTile);
}
/// <summary>
/// This event handler gets called as soon as a flip tile is removed from the visual tree.
/// Any existing reference of this flip tile is eliminated from the service singleton.
/// </summary>
/// <param name="sender">The flip tile.</param>
/// <param name="e">The event information.</param>
void FlipTile_Unloaded(object sender, RoutedEventArgs e)
{
FlipTileService.FinalizeReference(this);
}
/// <summary>
/// This event handler gets called as soon as a flip tile is added to the visual tree.
/// A reference of this flip tile is passed on to the service singleton.
/// </summary>
/// <param name="sender">The flip tile.</param>
/// <param name="e">The event information.</param>
void FlipTile_Loaded(object sender, RoutedEventArgs e)
{
FlipTileService.InitializeReference(this);
}
