Re: Have charts to work with a RootPanel based application

i tried something like this

public class TestFrame extends Composite  {

    PieChart pieChart ;    
   
    public TestFrame() {    
           
        VerticalPanel verticalPanel =  getPnl();
        initWidget( verticalPanel );
       
        Button btn = new Button("graph");
        btn.setSize("100%", "100px");        
        btn.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                setViewPieChart();
            }});        
        verticalPanel.add(btn);
       
    }
   
    public static VerticalPanel getPnl(){
        VerticalPanel verticalPanel = new VerticalPanel();
        verticalPanel.setWidth("300px");
        verticalPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);

        return verticalPanel;
    }
   
    private void setViewPieChart() {
       
        ChartLoader chartLoader = new ChartLoader(ChartPackage.CORECHART);
        chartLoader.loadApi(new Runnable() {
            @Override
            public void run() {
                SimpleLayoutPanel layoutPanel = new SimpleLayoutPanel();
                PieChart pieChart = (PieChart)getPieChart();
                layoutPanel.setWidget(getPieChart());
                pieChart.draw(getDataTable());
               
                RootPanel.get().clear();
                RootPanel.get().add(new TestFrame2(layoutPanel));
        }});    
       
    }    
   
    private Widget getPieChart() {
        if (pieChart == null) {
            pieChart = new PieChart();
        }
        return pieChart;
    }
}

    **********
   

public class TestFrame2 extends Composite  {

    public TestFrame2(SimpleLayoutPanel layoutPanel) {    
           
        VerticalPanel verticalPanel =  getPnl();
        initWidget( verticalPanel );
       
        verticalPanel.add(layoutPanel);
       
    }
   
    public static VerticalPanel getPnl(){
        VerticalPanel verticalPanel = new VerticalPanel();
        verticalPanel.setWidth("300px");
        verticalPanel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);

        return verticalPanel;
    }
}

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