ToolWindow with AutoHide are not hidden when backstage menu is shown

Okay, it looks like I have found a workaround:

Ribbon.IsApplicationMenuOpenChanged += Ribbon_IsApplicationMenuOpenChanged;

private void Ribbon_IsApplicationMenuOpenChanged(object sender, BooleanPropertyChangedRoutedEventArgs e)
{
  bool isContentVisible = !e.NewValue;

  foreach (var window in DockSite.DocumentWindows.Cast<DockingWindow>().Where(w => !w.IsFloating))
  {
    if (window.State == DockingWindowState.AutoHide)
    {
      window.IsOpen = isContentVisible;
    }
    else
    {
      window.Visibility = isContentVisible ? Visibility.Visible : Visibility.Collapsed;
    }
  }
}

Hi Tobias,

Yes I was going to suggest something along those lines, although DocumentWindows aren't tool windows and will never auto-hide.  You migh want to use the ToolWindows collection instead.

Another simpler thing you can do is just check the dockSite.PrimaryDockHost.IsAutoHidePopupOpen property when the app menu opens (use that same event).  If that property returns true, then call dockSite.PrimaryDockHost.CloseAutoHidePopup(true, false).