Issue trying to set the PieChart Legend vertical in JavaFX

I've created my custom PieChart class to make my own Legend, in my program the pieChart as to be updated runtime and so as the Legend too, I know my code isn't well designed and I've used bad to solution to gain what I want but it works, and it's a private project so it don't need to be perfect. Anyway this is my code:

public class CustomPieChart extends PieChart {
    public ScrollPane scrollPane = new ScrollPane();
    public Legend theLegend;
     public CustomPieChart(ObservableList<PieChart.Data> data){
        super(data);
        setTitle("MyTitle");
        setLegendSide(Side.RIGHT);
        setLabelsVisible(false);
        ((Legend)getLegend()).setVertical(true);
        ((Legend)getLegend()).setPrefColumns(1);
     }

    private void createScrollableLegend(){
        setStartAngle(180); 
        setLabelLineLength(20);
        if(getLegend()!= null){
            theLegend=(Legend) getLegend();
            theLegend.setPrefWidth(130);


            scrollPane.setContent(theLegend);
            scrollPane.setHbarPolicy(ScrollBarPolicy.NEVER);
            scrollPane.setVbarPolicy(ScrollBarPolicy.AS_NEEDED);
            scrollPane.maxHeightProperty().bind(heightProperty());
            setLegend(scrollPane);  

        }
    }
    public void refreshChart(ObservableList<PieChart.Data> data){
        if(getData()!=null){
            getData().clear();
        }

        //This is the only way I found to "refresh" the values of the legend
        CustomPieChart tmp = new CustomPieChart(data);
        setLegend((Legend)tmp.getLegend());

        setData(data);
        createScrollableLegend();

    }
}

What I'm trying to achieve is a scrollable Legend that goes vertical only instead this is what I got :

As you can see some of the element are displayed outside the Pane...

Be gentle I'm pretty noob ^^