bool mousePush(double, double, const osgWidget::WindowManager*) {
        if(!_window->isVisible()) _window->show();

        else _window->hide();

        return true;
    }
    void managed(osgWidget::WindowManager* wm) {
        osgWidget::Label::managed(wm);

        wm->addChild(_window.get());

        _window->hide();
    }