public class StatForm extends Form {
     Form current ;
     Resources res;

       public StatForm(Form previous) {
        current=this;

     setTitle("Stats");

                setLayout(BoxLayout.y());

//HERE IS THE RETURN BUTTON I DOUBT ITS PLACE
Form f1=new Form("hi");
 Container f2=new Container();


    Button ret=new Button("Return");

   ret.addPointerPressedListener(l->{

  new ListTheatreForm(res).show();

});
     f1.addAll(ret);
 add(f1);
f1.show();

//ENDS HERE
      this.add(createPieChartForm());



    }
private DefaultRenderer buildCategoryRenderer(int[] colors) {

    DefaultRenderer renderer = new DefaultRenderer();
    renderer.setLabelsTextSize(30);
    renderer.setLegendTextSize(30);
    renderer.setMargins(new int[]{20, 30, 15, 0});
    for (int color : colors) {
        SimpleSeriesRenderer r = new SimpleSeriesRenderer();
        r.setColor(color);
        renderer.addSeriesRenderer(r);
    }
    return renderer;
}

/**
 * Builds a category series using the provided values.
 *
 * @param titles the series titles
 * @param values the values
 * @return the category series
 */
protected CategorySeries buildCategoryDataset(String title, HashMap<String, Integer> values) {
    CategorySeries series = new CategorySeries(title);
   series.add("Historical", values.get("historical"));
        series.add("Reality", values.get("reality"));
        series.add("Comedy", values.get("comedy"));


    return series;
}

public Form createPieChartForm() {

      int historical = 0;
    int comedy = 0;
    int reality = 0;
    ArrayList<Theatre> th = ServiceTheatre.getInstance().AffichageTheatre();
    for (int i=0;i<th.size();i++)
    {
        switch (th.get(i).getGenre().toLowerCase()) {
            case "historical":
                historical++;
                break;
            case "comedy":
                comedy++;
                break;
            default:
                reality++;
                break;
        }
    }
     HashMap<String, Integer> values = new HashMap<>();
    values.put("historical", historical);
    values.put("comedy", comedy);
    values.put("reality", reality);

    // Set up the renderer
  int[] colors = new int[]{ColorUtil.GREEN, ColorUtil.MAGENTA, ColorUtil.LTGRAY};
    DefaultRenderer renderer = buildCategoryRenderer(colors);
    renderer.setZoomButtonsVisible(true);
    renderer.setZoomEnabled(true);
    renderer.setChartTitleTextSize(30);
    renderer.setDisplayValues(true);
    renderer.setShowLabels(true);
    renderer.setLabelsColor(ColorUtil.BLACK);
    SimpleSeriesRenderer r = renderer.getSeriesRendererAt(0);
    r.setGradientEnabled(true);
    r.setGradientStart(0, ColorUtil.BLUE);
    r.setGradientStop(0, ColorUtil.GREEN);
    r.setHighlighted(true);

    // Create the chart ... pass the values and renderer to the chart object.
    PieChart chart = new PieChart(buildCategoryDataset("Project budget", values), renderer);

    // Wrap the chart in a Component so we can add it to a form
    ChartComponent c = new ChartComponent(chart);

    // Create a form and show it.
    Form f = new Form("by Genre");


    f.add( c);

    f.show();

    return f;

}
}