/// <summary>
/// Perform key down handling.
/// </summary>
/// <param name="e">A KeyEventArgs that contains the event data.</param>
public virtual void KeyDown(KeyEventArgs e)
{
// Tell current view of key event
if (ActiveView != null)
{
ActiveView.KeyDown(e);
}
else if (_root != null)
{
_root.KeyDown(e);
}
}