public constructorDemaclass(){
  ...
  produceChart();
}

public Chart produceChart(){
{
  ...
  objectsCODE[0] = new DataObject("CODE", "startup", 32.);
  objectsCODE[1] = new DataObject("CODE", "thandlers", 408.);
  objectsCODE[2] = new DataObject("CODE", "text", 152560.);
  PieChartCode = new PieChartFactory(objectsCODE, labelField, null);
  chart1 = PieChartCode.producePieChart(null, "CODE");
  ...
}
}

public void createPartControl(Composite parent) {
  cParent = parent;
  try {
    paintCanvas = new Canvas( parent, SWT.BORDER |SWT.V_SCROLL );
    paintCanvas.getVerticalBar().setEnabled(false);
    paintCanvas.setLayoutData( new GridData( GridData.FILL_BOTH ) );
    paintCanvas.setBackground( Display.getDefault( ).getSystemColor( SWT.COLOR_WHITE ) );
    chartViewer = new ChartViewer( );
    paintCanvas.addPaintListener( chartViewer );
    paintCanvas.addControlListener( chartViewer );
    chartViewer.setViewer( paintCanvas );
    
    createActions(parent);
    IActionBars actionBars = getViewSite().getActionBars();
    initToolBar(actionBars.getToolBarManager());
    
    chartViewer.renderModel(chart1);
    saveChartAction.setChart(chart1);
    saveChartAction.setBounds(chartViewer.getBounds());
    saveXMLAction.setChart(chart1);
    
    if (chart instanceof ChartWithoutAxes){
      valueSeriesDetailsAction = new  ValueSeriesDetailsAction(this);
      getViewSite().getActionBars().getToolBarManager().add(valueSeriesDetailsAction);
    }
    else {
      coloredByAction = new ColoredByAction(this);
      getViewSite().getActionBars().getToolBarManager().add(coloredByAction);
    }			
    getViewSite().getActionBars().getToolBarManager().update(true);
  
  } catch (Throwable _)
  {
    Status s = new Status(
    Status.ERROR,
    Activator.PLUGIN_ID,
    Status.ERROR,
    "Error when creating AWT Frame...",
    _);
    Activator.getDefault().getLog().log(s);
  }
}

public Chart producePieChart(IChartField valField,String title)
{
  ChartWithoutAxes cwoaPie = ChartWithoutAxesImpl.create( );
  cwoaPie.setSeriesThickness( 20 );
  cwoaPie.getBlock( ).setBackground( ColorDefinitionImpl.WHITE( ) );
  //cwoaPie.getBlock( ).setBounds(BoundsImpl.create(0,0,252,288));
  Bounds bd = cwoaPie.getBlock( ).getBounds();
  cwoaPie.setDimension(ChartDimension.TWO_DIMENSIONAL_WITH_DEPTH_LITERAL);
  
  // Plot
  Plot p = cwoaPie.getPlot( );
  p.getClientArea( ).setBackground( null );
  p.getClientArea( ).getOutline( ).setVisible( false );
  
  // Legend
  Legend lg = cwoaPie.getLegend( );
  lg.getOutline( ).setVisible( false );
  lg.getText( ).getFont( ).setSize( 8 );
  lg.getClientArea().setBackground(ColorDefinitionImpl.create(255, 255, 204));
  ((ColorDefinitionImpl)lg.getClientArea().getBackground()).brighter();
  lg.setAnchor(Anchor.NORTH_LITERAL);
  lg.setItemType( LegendItemType.CATEGORIES_LITERAL );
  
  // Title
  cwoaPie.getTitle( ).getLabel( ).getCaption( ).setValue(title);
  cwoaPie.getTitle( ).getOutline( ).setVisible( false );
  
  //Base Data Set
  List<String> textLabelsCODE = new ArrayList<String>();
  for (DataObject obj : objData) {
    textLabelsCODE.add(obj.sousSection);
  }
  TextDataSet categoryCODEValues = TextDataSetImpl.create(textLabelsCODE );
  
  // Base Series
  Series seCategoryCODE = SeriesImpl.create( );
  seCategoryCODE.setDataSet( categoryCODEValues );
  
  SeriesDefinition sdBase = SeriesDefinitionImpl.create( );
  cwoaPie.getSeriesDefinitions( ).add( sdBase );
  
  sdBase.getSeries( ).add( seCategoryCODE );
  
  // Personnalise les couleurs
  sdBase.getSeriesPalette().getEntries().clear();
  int nbCode = sectSize.GetNbCode();
  for(int i = 0; i<nbCode; i++)
  {
    sdBase.getSeriesPalette().getEntries().add(ColorDefinitionImpl.create(255, (i*(200/nbCode)), 0));
  }
  int nbData = sectSize.GetNbData();
  for(int i = 0; i<nbData; i++)
  {
    sdBase.getSeriesPalette().getEntries().add(ColorDefinitionImpl.create(0, (i*(200/nbData)), 255));
  }
  SeriesDefinition sdValue = SeriesDefinitionImpl.create( );
  sdBase.getSeriesDefinitions( ).add( sdValue );
  
  List<Double> doubleValues = new ArrayList<Double>();
  for (DataObject obj : objData) {
    doubleValues.add(obj.size);
  }
  
  NumberDataSet Values = NumberDataSetImpl.create(doubleValues);
  
  // Pie Series
  PieSeries sePie = (PieSeries) PieSeriesImpl.create( );
  
  sePie.setExplosion(2);
  sePie.setDataSet( Values );
  sePie.getLabel().getCaption().getFont().setSize(8);		    
  sePie.setLeaderLineStyle(LeaderLineStyle.FIXED_LENGTH_LITERAL);
  sePie.setLeaderLineLength(15);
  
  DataPointComponent dpc = DataPointComponentImpl.create( DataPointComponentType.ORTHOGONAL_VALUE_LITERAL,JavaNumberFormatSpecifierImpl.create( "###.###,00" ) );
  sePie.getDataPoint( ).getComponents( ).clear( );
  sePie.getDataPoint( ).getComponents( ).add( dpc );
  
  //By default the title of the Value Series is not visible
  sePie.getTitle().setVisible(false);	
  //Mouse over the Serie to Show Tooltips
  setTriggering(sePie,lg);	
  sdValue.getSeries( ).add( sePie);
  
  return cwoaPie;
}

gcs = gr.build( idr.getDisplayServer( ), cm, bo, null, null, null );

gcs = gr.build(idr.getDisplayServer( ), cm, bo, null);

idr.setProperty( IDeviceRenderer.GRAPHICS_CONTEXT, gcImage );

if (types [i] == event.type) {