private CommandFactory()
{
shortcutCommandConstructor = new UndoShortcutCommandConstructor();
shortcutCommandConstructor.AddHandler(new RedoShortcutCommandConstructor());
shortcutCommandConstructor.AddHandler(new SaveAsPdfShortcutCommandConstructor());
shortcutCommandConstructor.AddHandler(new SaveAsLilyPondShortcutCommandConstructor());
shortcutCommandConstructor.AddHandler(new OpenFileShortcutCommandConstructor());
shortcutCommandConstructor.AddHandler(new InsertTrebleClefShortcutCommandConstructor());
}
public void AddHandler(ShortcutCommandConstructorBase handler)
{
if (nextHandler == null)
{
nextHandler = handler;
}
else
{
nextHandler.AddHandler(handler);
}
}