To reproduce run following code


import javafx.application.Application;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.ScrollBar;
import javafx.scene.control.TitledPane;
import javafx.scene.control.ToggleButton;
import javafx.scene.layout.HBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Text;
import javafx.stage.Stage;
import javafx.stage.StageStyle;

public class ButtonTest extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    private Parent getContent() {
        HBox list = new HBox(10);
        ScrollBar but=new ScrollBar();
        but.setStyle("-fx-border-color:red;-fx-border-radius:10;");
        but.setFocusTraversable(false);
        list.getChildren().addAll(but);
        return list;
    }

    public void start(Stage stage) {
        stage.setX(100);
        stage.setY(100);
        stage.setWidth(200);
        stage.setHeight(200);
        Scene scene = new Scene(getContent(),400,400);
        stage.setScene(scene);
        stage.show();
    }
}