/// <summary>
/// Hides a visible Metro Dialog instance.
/// </summary>
/// <param name="window">The window with the dialog that is visible.</param>
/// <param name="dialog">The dialog instance to hide.</param>
/// <param name="settings">An optional pre-defined settings instance.</param>
/// <returns>A task representing the operation.</returns>
/// <exception cref="InvalidOperationException">
/// The <paramref name="dialog"/> is not visible in the window.
/// This happens if <see cref="ShowMetroDialogAsync"/> hasn't been called before.
/// </exception>
public Task HideMetroDialogAsync(
IMetroWindow metroWindow
, IBaseMetroDialogFrame dialog
, IMetroDialogFrameSettings settings = null)
{
metroWindow.Dispatcher.VerifyAccess();
if (!metroWindow.MetroActiveDialogContainer.Children.Contains(dialog as UIElement) && !metroWindow.MetroInactiveDialogContainer.Children.Contains(dialog as UIElement))
{
throw new InvalidOperationException("The provided dialog is not visible in the specified window.");
}
metroWindow.SizeChanged -= dialog.SizeChangedHandler;
dialog.OnClose();
Task closingTask = (Task)metroWindow.Dispatcher.Invoke(new Func <Task>(dialog._WaitForCloseAsync));
return(closingTask.ContinueWith(a =>
{
if (DialogClosed != null)
{
metroWindow.Dispatcher.BeginInvoke(new Action(() => DialogClosed(this, new DialogStateChangedEventArgs())));
}
return (Task)metroWindow.Dispatcher.Invoke(new Func <Task>(() =>
{
this.RemoveDialog(metroWindow, dialog);
return this.HandleOverlayOnHide(metroWindow, settings);
}));
}).Unwrap());
}
