void ConfigureDialogWindowEvents(IDialogWindow contentDialog, Action <IDialogResult> callback)
{
IDialogResult result = null;
Action <IDialogResult> requestCloseHandler = null;
requestCloseHandler = (o) =>
{
result = o;
contentDialog.Hide();
};
RoutedEventHandler loadedHandler = null;
loadedHandler = (o, e) =>
{
contentDialog.Loaded -= loadedHandler;
if (contentDialog.DataContext is IDialogAware dialogAware)
{
dialogAware.RequestClose += requestCloseHandler;
}
};
contentDialog.Loaded += loadedHandler;
TypedEventHandler <ContentDialog, ContentDialogClosingEventArgs> closingHandler = null;
closingHandler = (o, e) =>
{
if (contentDialog.DataContext is IDialogAware dialogAware &&
!dialogAware.CanCloseDialog())
{
e.Cancel = true;
}
};
contentDialog.Closing += closingHandler;
TypedEventHandler <ContentDialog, ContentDialogClosedEventArgs> closedHandler = null;
closedHandler = (o, e) =>
{
contentDialog.Closed -= closedHandler;
contentDialog.Closing -= closingHandler;
if (contentDialog.DataContext is IDialogAware dialogAware)
{
dialogAware.RequestClose -= requestCloseHandler;
dialogAware.OnDialogClosed();
}
if (result == null)
{
result = new DialogResult();
}
callback?.Invoke(result);
contentDialog.DataContext = null;
contentDialog.Content = null;
};
contentDialog.Closed += closedHandler;
}