private WebKeyModifiers MapModifiers(Event e)
{
int modifiers = 0;
if (e.control)
modifiers |= (int)WebKeyModifiers.ControlKey;
if (e.shift)
modifiers |= (int)WebKeyModifiers.ShiftKey;
if (e.alt)
modifiers |= (int)WebKeyModifiers.AltKey;
return (WebKeyModifiers)modifiers;
}