protected override void OnKeyDown(KeyEventArgs e)
{
base.OnKeyDown(e);
if (!e.Handled)
{
if (e.Key == Key.Down)
{
// On arrow down key press on TabHeader, try to move
// the focus to first element of the corresponding tab.
RibbonTab tab = RibbonTab;
if (tab != null)
{
if (tab.MoveFocus(new TraversalRequest(FocusNavigationDirection.First)))
{
e.Handled = true;
}
}
}
else if (e.Key == Key.Space ||
e.Key == Key.Enter)
{
Ribbon ribbon = Ribbon;
if (ribbon != null)
{
if (ribbon.IsMinimized)
{
if (!ribbon.IsDropDownOpen)
{
// Open Ribbon dropdown when space/enter is
// pressed on a tab header.
ribbon.IsDropDownOpen = true;
e.Handled = true;
}
}
else
{
// Restore the focus if the ribbon is not minimized.
Ribbon.RestoreFocusAndCapture(false);
e.Handled = true;
}
}
}
}
}