protected override void OnKeyDown(KeyRoutedEventArgs args)
{
// We don't perform any action in OnKeyDown because we wait for the key to be
// released before performing a Toggle(). However, if we don't handle OnKeyDown,
// it bubbles up to the parent ScrollViewer and may cause scrolling, which is
// undesirable. Therefore, we check to see if we will handle OnKeyUp for this key
// press, and if so, we set Handled=true for OnKeyDown to stop bubbling this event.
base.OnKeyDown(args);
var isHandled = args.Handled;
if (isHandled || _isDragging)
{
return;
}
var key = args.OriginalKey;
isHandled = KeyProcess.KeyDown(key, this);
args.Handled = isHandled;
_handledKeyDown = isHandled;
}
private protected virtual bool OnKeyDownInternal(VirtualKey key)
{
KeyProcess.KeyDown(key, out var handled, _keyboardNavigationAcceptsReturn, this);
return(handled);
}
