protected void OnDialogOpened(DialogOpenedEventArgs eventArgs)
{
RaiseEvent(eventArgs);
}
private static void IsOpenPropertyChangedCallback(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
{
var dialogHost = (DialogHost)dependencyObject;
if (dialogHost._popupContentControl != null)
{
ValidationAssist.SetSuppress(dialogHost._popupContentControl, !dialogHost.IsOpen);
}
VisualStateManager.GoToState(dialogHost, dialogHost.SelectState(), !TransitionAssist.GetDisableTransitions(dialogHost));
if (dialogHost.IsOpen)
{
WatchWindowActivation(dialogHost);
}
else
{
dialogHost._attachedDialogClosingEventHandler = null;
if (dialogHost._currentSnackbarMessageQueueUnPauseAction != null)
{
dialogHost._currentSnackbarMessageQueueUnPauseAction();
dialogHost._currentSnackbarMessageQueueUnPauseAction = null;
}
dialogHost.CurrentSession.IsEnded = true;
dialogHost.CurrentSession = null;
dialogHost._closeCleanUp();
//NB: _dialogTaskCompletionSource is only set in the case where the dialog is shown with Show
//To get into this case you need to display the dialog with Show and then hide it by setting IsOpen to false
//Setting this here ensures the other
dialogHost._dialogTaskCompletionSource?.TrySetResult(null);
// Don't attempt to Invoke if _restoreFocusDialogClose hasn't been assigned yet. Can occur
// if the MainWindow has started up minimized. Even when Show() has been called, this doesn't
// seem to have been set.
dialogHost.Dispatcher.InvokeAsync(() => dialogHost._restoreFocusDialogClose?.Focus(), DispatcherPriority.Input);
return;
}
dialogHost.CurrentSession = new DialogSession(dialogHost);
var window = Window.GetWindow(dialogHost);
dialogHost._restoreFocusDialogClose = window != null?FocusManager.GetFocusedElement(window) : null;
//multiple ways of calling back that the dialog has opened:
// * routed event
// * the attached property (which should be applied to the button which opened the dialog
// * straight forward dependency property
// * handler provided to the async show method
var dialogOpenedEventArgs = new DialogOpenedEventArgs(dialogHost.CurrentSession, DialogOpenedEvent);
dialogHost.OnDialogOpened(dialogOpenedEventArgs);
dialogHost._attachedDialogOpenedEventHandler?.Invoke(dialogHost, dialogOpenedEventArgs);
dialogHost.DialogOpenedCallback?.Invoke(dialogHost, dialogOpenedEventArgs);
dialogHost._asyncShowOpenedEventHandler?.Invoke(dialogHost, dialogOpenedEventArgs);
dialogHost.Dispatcher.BeginInvoke(DispatcherPriority.Background, new Action(() =>
{
CommandManager.InvalidateRequerySuggested();
UIElement child = dialogHost.FocusPopup();
if (child != null)
{
//https://github.com/ButchersBoy/MaterialDesignInXamlToolkit/issues/187
//totally not happy about this, but on immediate validation we can get some weird looking stuff...give WPF a kick to refresh...
Task.Delay(300).ContinueWith(t => child.Dispatcher.BeginInvoke(new Action(() => child.InvalidateVisual())));
}
}));
}