Java Code Examples for org.jfree.chart.plot.CategoryPlot#setRangeGridlinesVisible()

/**
 * Creates the histogram chart.
 * 
 * @return
 */
private JFreeChart createBarChart() {
	JFreeChart chart = ChartFactory.createBarChart(null, null, null, createBarDataset(), PlotOrientation.VERTICAL,
			false, false, false);
	AbstractAttributeStatisticsModel.setDefaultChartFonts(chart);
	chart.setBackgroundPaint(null);
	chart.setBackgroundImageAlpha(0.0f);

	CategoryPlot plot = (CategoryPlot) chart.getPlot();
	plot.setRangeGridlinesVisible(false);
	plot.setDomainGridlinesVisible(false);
	plot.setOutlineVisible(false);
	plot.setRangeZeroBaselineVisible(false);
	plot.setDomainGridlinesVisible(false);
	plot.setBackgroundPaint(COLOR_INVISIBLE);
	plot.setBackgroundImageAlpha(0.0f);

	BarRenderer renderer = (BarRenderer) plot.getRenderer();
	renderer.setSeriesPaint(0, AttributeGuiTools.getColorForValueType(Ontology.NOMINAL));
	renderer.setBarPainter(new StandardBarPainter());
	renderer.setDrawBarOutline(true);
	renderer.setShadowVisible(false);

	return chart;
}
 

/**
 * Creates the histogram chart.
 */
private JFreeChart createBarChart() {
	JFreeChart chart = ChartFactory.createBarChart(null, null, null, createBarDataset(), PlotOrientation.VERTICAL,
			false, false, false);
	setDefaultChartFonts(chart);
	chart.setBackgroundPaint(null);
	chart.setBackgroundImageAlpha(0.0f);

	CategoryPlot plot = (CategoryPlot) chart.getPlot();
	plot.setRangeGridlinesVisible(false);
	plot.setDomainGridlinesVisible(false);
	plot.setOutlineVisible(false);
	plot.setRangeZeroBaselineVisible(false);
	plot.setDomainGridlinesVisible(false);
	plot.setBackgroundPaint(COLOR_INVISIBLE);
	plot.setBackgroundImageAlpha(0.0f);

	BarRenderer renderer = (BarRenderer) plot.getRenderer();
	renderer.setSeriesPaint(0, AttributeGuiTools.getColorForValueType(Ontology.NOMINAL));
	renderer.setBarPainter(new StandardBarPainter());
	renderer.setDrawBarOutline(true);
	renderer.setShadowVisible(false);

	return chart;
}
 

public JFreeChart createChart(){
	
	logger.debug("IN");
	CategoryPlot plot = new CategoryPlot();

	
	NumberAxis rangeAxis = new NumberAxis("Kpi Values");
	rangeAxis.setLabelFont(new Font("Arial", Font.PLAIN, 12 ));
	Color colorLabel= Color.decode("#000000");
	rangeAxis.setLabelPaint(colorLabel);
	rangeAxis.setTickLabelFont(new Font("Arial", Font.PLAIN, 10 ));
	rangeAxis.setTickLabelPaint(colorLabel);
	plot.setRangeAxis(rangeAxis);
	
	CategoryAxis domainAxis = new CategoryAxis();
	domainAxis.setLabelFont(new Font("Arial", Font.PLAIN, 10 ));
       domainAxis.setLabelPaint(colorLabel);
       domainAxis.setTickLabelFont(new Font("Arial", Font.PLAIN, 10 ));
       domainAxis.setTickLabelPaint(colorLabel);
	plot.setDomainAxis(domainAxis);

	plot.setOrientation(PlotOrientation.VERTICAL);
	plot.setRangeGridlinesVisible(true);
	plot.setDomainGridlinesVisible(true);


	//I create a line renderer 
	MyStandardCategoryItemLabelGenerator generator=null;

		LineAndShapeRenderer lineRenderer = new LineAndShapeRenderer();
		lineRenderer.setShapesFilled(true);
		lineRenderer.setBaseItemLabelGenerator(generator);
		lineRenderer.setBaseItemLabelFont(new Font("Arial", Font.PLAIN, 12 ));
		lineRenderer.setBaseItemLabelPaint(colorLabel);
		lineRenderer.setBaseItemLabelsVisible(true);

		DefaultCategoryDataset datasetLine=(DefaultCategoryDataset)datasetMap.getDatasets().get("line");

			for (Iterator iterator = datasetLine.getRowKeys().iterator(); iterator.hasNext();) {
				String serName = (String) iterator.next();
				String labelName = "";
				int index=-1;
				index=datasetLine.getRowIndex(serName);
				
				Color color=Color.decode("#990200");
				lineRenderer.setSeriesPaint(index, color);	
			}

		plot.setDataset(0,datasetLine);
		plot.setRenderer(0,lineRenderer);

	plot.getDomainAxis().setCategoryLabelPositions(
			CategoryLabelPositions.UP_45);
	JFreeChart chart = new JFreeChart(plot);
	logger.debug("Chart created");
	TextTitle title=new TextTitle(name,new Font("Arial", Font.BOLD, 16 ),Color.decode("#990200"), RectangleEdge.TOP, HorizontalAlignment.CENTER, VerticalAlignment.TOP, RectangleInsets.ZERO_INSETS);
	chart.setTitle(title);
	TextTitle subTitle =new TextTitle(subName,new Font("Arial", Font.PLAIN, 12 ),Color.decode("#000000"), RectangleEdge.TOP, HorizontalAlignment.CENTER, VerticalAlignment.TOP, RectangleInsets.ZERO_INSETS);
	chart.addSubtitle(subTitle);
	TextTitle subTitle2 =new TextTitle(subName,new Font("Arial", Font.PLAIN, 8 ),Color.decode("#FFFFFF"), RectangleEdge.TOP, HorizontalAlignment.CENTER, VerticalAlignment.TOP, RectangleInsets.ZERO_INSETS);
	chart.addSubtitle(subTitle2);
	chart.removeLegend();
	
	chart.setBackgroundPaint(Color.white);
	logger.debug("OUT");
	return chart;
}
 

@Override
protected JFreeChart createGanttChart() throws JRException
{

	JFreeChart jfreeChart = super.createGanttChart();
	CategoryPlot categoryPlot = (CategoryPlot)jfreeChart.getPlot();
	categoryPlot.getDomainAxis().setCategoryLabelPositions(CategoryLabelPositions.STANDARD);
	categoryPlot.setDomainGridlinesVisible(true);
	categoryPlot.setDomainGridlinePosition(CategoryAnchor.END);
	categoryPlot.setDomainGridlineStroke(new BasicStroke(
			0.5f,
			BasicStroke.CAP_BUTT,
			BasicStroke.JOIN_MITER,
			50,
			new float[] {1},
			0
			)
	);

	categoryPlot.setDomainGridlinePaint(ChartThemesConstants.GRAY_PAINT_134);

	categoryPlot.setRangeGridlinesVisible(true);
	categoryPlot.setRangeGridlineStroke(new BasicStroke(
			0.5f,
			BasicStroke.CAP_BUTT,
			BasicStroke.JOIN_MITER,
			50,
			new float[] {1},
			0
			)
	);

	categoryPlot.setRangeGridlinePaint(ChartThemesConstants.GRAY_PAINT_134);
	categoryPlot.getDomainAxis().setTickLabelsVisible(
			//barPlot.isShowTickLabels()
			true
			);
	CategoryItemRenderer categoryRenderer = categoryPlot.getRenderer();
	categoryRenderer.setBaseItemLabelsVisible(true);
	BarRenderer barRenderer = (BarRenderer)categoryRenderer;
	barRenderer.setSeriesPaint(0, ChartThemesConstants.EYE_CANDY_SIXTIES_COLORS.get(3));
	barRenderer.setSeriesPaint(1, ChartThemesConstants.EYE_CANDY_SIXTIES_COLORS.get(0));
	CategoryDataset categoryDataset = categoryPlot.getDataset();
	if (categoryDataset != null)
	{
		for (int i = 0; i < categoryDataset.getRowCount(); i++)
		{
			barRenderer.setSeriesItemLabelFont(i, categoryPlot.getDomainAxis().getTickLabelFont());
			barRenderer.setSeriesItemLabelsVisible(i, true);
		}
	}
	categoryPlot.setOutlinePaint(Color.DARK_GRAY);
	categoryPlot.setOutlineStroke(new BasicStroke(1.5f));
	categoryPlot.setOutlineVisible(true);
	return jfreeChart;
}
 

@Override
	protected JFreeChart createGanttChart() throws JRException
	{

		JFreeChart jfreeChart = super.createGanttChart();
		CategoryPlot categoryPlot = (CategoryPlot)jfreeChart.getPlot();
		categoryPlot.getDomainAxis().setCategoryLabelPositions(CategoryLabelPositions.STANDARD);
		categoryPlot.setDomainGridlinesVisible(true);
		categoryPlot.setDomainGridlinePosition(CategoryAnchor.END);
		categoryPlot.setDomainGridlineStroke(new BasicStroke(
				0.5f,
				BasicStroke.CAP_BUTT,
				BasicStroke.JOIN_MITER,
				50,
				new float[] {1},
				0
				)
		);

		categoryPlot.setDomainGridlinePaint(ChartThemesConstants.GRAY_PAINT_217);

		categoryPlot.setRangeGridlinesVisible(true);
		categoryPlot.setRangeGridlineStroke(new BasicStroke(
				0.5f,
				BasicStroke.CAP_BUTT,
				BasicStroke.JOIN_MITER,
				50,
				new float[] {1},
				0
				)
		);

		categoryPlot.setRangeGridlinePaint(ChartThemesConstants.GRAY_PAINT_217);
//		JRBarPlot barPlot = (BarPlot)categoryPlot;
//		categoryPlot.getDomainAxis().setTickLabelsVisible(
//				categoryPlot.getShowTickLabels() == null ? true : barPlot.getShowTickLabels().
//				true
//				);
		CategoryItemRenderer categoryRenderer = categoryPlot.getRenderer();
		categoryRenderer.setBaseItemLabelsVisible(true);
		BarRenderer barRenderer = (BarRenderer)categoryRenderer;
		@SuppressWarnings("unchecked")
		List<Paint> seriesPaints = (List<Paint>)getDefaultValue(defaultChartPropertiesMap, ChartThemesConstants.SERIES_COLORS);
		barRenderer.setSeriesPaint(0, seriesPaints.get(3));
		barRenderer.setSeriesPaint(1, seriesPaints.get(0));
		CategoryDataset categoryDataset = categoryPlot.getDataset();
		if(categoryDataset != null)
		{
			for(int i = 0; i < categoryDataset.getRowCount(); i++)
			{
				barRenderer.setSeriesItemLabelFont(i, categoryPlot.getDomainAxis().getTickLabelFont());
				barRenderer.setSeriesItemLabelsVisible(i, true);
	//			barRenderer.setSeriesPaint(i, GRADIENT_PAINTS[i]);
	//			CategoryMarker categoryMarker = new CategoryMarker(categoryDataset.getColumnKey(i),MARKER_COLOR, new BasicStroke(1f));
	//			categoryMarker.setAlpha(0.5f);
	//			categoryPlot.addDomainMarker(categoryMarker, Layer.BACKGROUND);
			}
		}
		categoryPlot.setOutlinePaint(Color.DARK_GRAY);
		categoryPlot.setOutlineStroke(new BasicStroke(1.5f));
		categoryPlot.setOutlineVisible(true);
		return jfreeChart;
	}
 

private JFreeChart createChart() {
	if (data.getItemCount() > 0) {
		// get cumulative percentages
		KeyedValues cumulative = DataUtilities.getCumulativePercentages(data);

		CategoryDataset categoryDataset = DatasetUtilities.createCategoryDataset(
				"Count for " + this.dataTable.getColumnName(this.countColumn) + " = " + countValue, data);

		// create the chart...
		final JFreeChart chart = ChartFactory.createBarChart(null, // chart title
				this.dataTable.getColumnName(this.groupByColumn), // domain axis label
				"Count", // range axis label
				categoryDataset, // data
				PlotOrientation.VERTICAL, true, // include legend
				true, false);

		// set the background color for the chart...
		chart.setBackgroundPaint(Color.WHITE);

		// get a reference to the plot for further customization...
		CategoryPlot plot = chart.getCategoryPlot();

		CategoryAxis domainAxis = plot.getDomainAxis();
		domainAxis.setLowerMargin(0.02);
		domainAxis.setUpperMargin(0.02);
		domainAxis.setLabelFont(LABEL_FONT_BOLD);
		domainAxis.setTickLabelFont(LABEL_FONT);

		// set the range axis to display integers only...
		NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
		rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits(Locale.US));
		rangeAxis.setLabelFont(LABEL_FONT_BOLD);
		rangeAxis.setTickLabelFont(LABEL_FONT);

		// second data set (cumulative percentages)
		CategoryDataset dataset2 = DatasetUtilities.createCategoryDataset("Cumulative (Percent)", cumulative);

		LineAndShapeRenderer renderer2 = new LineAndShapeRenderer();
		renderer2.setSeriesPaint(0, SwingTools.VERY_DARK_BLUE.darker());

		NumberAxis axis2 = new NumberAxis("Percent of " + countValue);
		axis2.setNumberFormatOverride(NumberFormat.getPercentInstance());
		axis2.setLabelFont(LABEL_FONT_BOLD);
		axis2.setTickLabelFont(LABEL_FONT);

		plot.setRangeAxis(1, axis2);
		plot.setDataset(1, dataset2);
		plot.setRenderer(1, renderer2);
		plot.mapDatasetToRangeAxis(1, 1);

		axis2.setTickUnit(new NumberTickUnit(0.1));

		// show grid lines
		plot.setRangeGridlinesVisible(true);

		// bring cumulative line to front
		plot.setDatasetRenderingOrder(DatasetRenderingOrder.FORWARD);

		if (isLabelRotating()) {
			domainAxis.setTickLabelsVisible(true);
			domainAxis.setCategoryLabelPositions(CategoryLabelPositions.createUpRotationLabelPositions(Math.PI / 2.0d));
		}

		return chart;
	} else {
		return null;
	}
}
 

private byte[] generateStackedAreaChart (CategoryDataset dataset, int width, int height)
{
	JFreeChart chart = ChartFactory.createStackedAreaChart (null, // chart title
			null, // domain axis label
			null, // range axis label
			dataset, // data
			PlotOrientation.VERTICAL, // the plot orientation
			true, // legend
			true, // tooltips
			false // urls
			);

	// set background
	chart.setBackgroundPaint (parseColor (statsManager.getChartBackgroundColor ()));

	// set chart border
	chart.setPadding (new RectangleInsets (10, 5, 5, 5));
	chart.setBorderVisible (true);
	chart.setBorderPaint (parseColor ("#cccccc"));

	// set anti alias
	chart.setAntiAlias (true);

	CategoryPlot plot = (CategoryPlot) chart.getPlot ();

	// set transparency
	plot.setForegroundAlpha (0.7f);
	plot.setAxisOffset (new RectangleInsets (5.0, 5.0, 5.0, 5.0));
	plot.setBackgroundPaint (Color.lightGray);
	plot.setDomainGridlinesVisible (true);
	plot.setDomainGridlinePaint (Color.white);
	plot.setRangeGridlinesVisible (true);
	plot.setRangeGridlinePaint (Color.white);

	// set colour of regular users using Karate belt colour: white, green, blue, brown, black/gold
	CategoryItemRenderer renderer = plot.getRenderer ();
	renderer.setSeriesPaint (0, new Color (205, 173, 0)); // gold users
	renderer.setSeriesPaint (1, new Color (139, 69, 19));
	renderer.setSeriesPaint (2, Color.BLUE);
	renderer.setSeriesPaint (3, Color.GREEN);
	renderer.setSeriesPaint (4, Color.WHITE);

	// set the range axis to display integers only...
	NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis ();
	rangeAxis.setStandardTickUnits (NumberAxis.createIntegerTickUnits ());

	CategoryAxis domainAxis = (CategoryAxis) plot.getDomainAxis ();
	domainAxis.setCategoryLabelPositions (CategoryLabelPositions.DOWN_45);
       domainAxis.setLowerMargin(0.0);
       domainAxis.setUpperMargin(0.0);

       BufferedImage img = chart.createBufferedImage (width, height);
	final ByteArrayOutputStream out = new ByteArrayOutputStream();
	try{
		ImageIO.write(img, "png", out);
	}catch(IOException e){
		log.warn("Error occurred while generating SiteStats chart image data", e);
	}
	return out.toByteArray();
}
 

private byte[] createToolAnalysisChart (int width, int height)
{
	CategoryDataset dataset = getToolAnalysisDataSet ();
	
	if (dataset == null) {
		return generateNoDataChart(width, height);
	}
			
	JFreeChart chart = ChartFactory.createBarChart (
			null, // chart title
			null, // domain axis label
			null, // range axis label
			dataset, // data
			PlotOrientation.HORIZONTAL, // the plot orientation
			false, // legend
			false, // tooltips
			false // urls
	);
	
	// set background
	chart.setBackgroundPaint (parseColor (statsManager.getChartBackgroundColor ()));

	// set chart border
	chart.setPadding (new RectangleInsets (10, 5, 5, 5));
	chart.setBorderVisible (true);
	chart.setBorderPaint (parseColor ("#cccccc"));

	// set anti alias
	chart.setAntiAlias (true);

	CategoryPlot plot = (CategoryPlot) chart.getPlot ();

	// set transparency
	plot.setForegroundAlpha (0.7f);
	plot.setAxisOffset (new RectangleInsets (5.0, 5.0, 5.0, 5.0));
	plot.setBackgroundPaint (Color.lightGray);
	plot.setDomainGridlinesVisible (false);
	plot.setRangeGridlinesVisible (true);
	plot.setRangeGridlinePaint (Color.white);
	
       CategoryAxis domainAxis = plot.getDomainAxis();
       domainAxis.setVisible(false);
       domainAxis.setUpperMargin (0);
       domainAxis.setLowerMargin (0);
       
       NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
       rangeAxis.setUpperMargin(0.20);
	rangeAxis.setStandardTickUnits (NumberAxis.createIntegerTickUnits ());
       
       BarRenderer renderer = (BarRenderer) plot.getRenderer();
       CategoryItemLabelGenerator generator 
           = new StandardCategoryItemLabelGenerator("{1}", 
                   NumberFormat.getInstance(new ResourceLoader().getLocale()));
       renderer.setDefaultItemLabelGenerator(generator);
       renderer.setDefaultItemLabelFont(new Font("SansSerif", Font.PLAIN, 9));
       renderer.setDefaultItemLabelsVisible(true);
       renderer.setItemMargin (0);
       renderer.setSeriesPaint (0, Color.BLUE);
       
       BufferedImage img = chart.createBufferedImage (width, height);
	final ByteArrayOutputStream out = new ByteArrayOutputStream();
	try{
		ImageIO.write(img, "png", out);
	}catch(IOException e){
		log.warn("Error occurred while generating SiteStats chart image data", e);
	}
	return out.toByteArray();
}
 

@Override
public void initChart_post_data_init(final IScope scope) {
	// TODO Auto-generated method stub
	super.initChart_post_data_init(scope);
	final CategoryPlot pp = (CategoryPlot) chart.getPlot();

	final String sty = getStyle();
	this.useSubAxis = false;
	switch (sty) {
		case IKeyword.STACK: {
			if (this.series_label_position.equals("xaxis")) {
				this.series_label_position = "default";
			}
			if (this.series_label_position.equals("default")) {
				this.series_label_position = "legend";
			}
			break;
		}
		default: {
			if (this.series_label_position.equals("default")) {
				if (this.getChartdataset().getSources().size() > 0) {
					final ChartDataSource onesource = this.getChartdataset().getSources().get(0);
					if (onesource.isCumulative) {
						this.series_label_position = "legend";
					} else {
						this.series_label_position = "xaxis";
						useMainAxisLabel = false;
					}

				} else {
					this.series_label_position = "legend";

				}
			}
			break;
		}
	}
	if (this.series_label_position.equals("xaxis")) {
		this.useSubAxis = true;
	}

	if (!this.series_label_position.equals("legend")) {
		chart.getLegend().setVisible(false);
		// legend is useless, but I find it nice anyway... Could put back...
	}
	this.resetDomainAxis(scope);

	pp.setDomainGridlinePaint(axesColor);
	pp.setRangeGridlinePaint(axesColor);
	if (!this.getXTickLineVisible(scope)) {
		pp.setDomainGridlinesVisible(false);
	}
	if (!this.getYTickLineVisible(scope)) {
		pp.setRangeGridlinesVisible(false);
	}
	pp.setRangeCrosshairVisible(true);
	pp.getRangeAxis().setAxisLinePaint(axesColor);
	pp.getRangeAxis().setLabelFont(getLabelFont());
	pp.getRangeAxis().setTickLabelFont(getTickFont());
	if (textColor != null) {
		pp.getRangeAxis().setLabelPaint(textColor);
		pp.getRangeAxis().setTickLabelPaint(textColor);
	}
	if (ytickunit > 0) {
		((NumberAxis) pp.getRangeAxis()).setTickUnit(new NumberTickUnit(ytickunit));
	}

	if (ylabel != null && !ylabel.isEmpty()) {
		pp.getRangeAxis().setLabel(ylabel);
	}
	if (this.series_label_position.equals("yaxis")) {
		pp.getRangeAxis().setLabel(this.getChartdataset().getDataSeriesIds(scope).iterator().next());
		chart.getLegend().setVisible(false);
	}

	if (xlabel != null && !xlabel.isEmpty()) {
		pp.getDomainAxis().setLabel(xlabel);
	}
	if (textColor != null) {
		pp.getDomainAxis().setLabelPaint(textColor);
		pp.getDomainAxis().setTickLabelPaint(textColor);
		if (this.series_label_position.equals("xaxis")) {
			((SubCategoryAxis)pp.getDomainAxis()).setSubLabelPaint(textColor);
		}			
	}
}
 

private byte[] generateStackedAreaChart (CategoryDataset dataset, int width, int height)
{
	JFreeChart chart = ChartFactory.createStackedAreaChart (null, // chart title
			null, // domain axis label
			null, // range axis label
			dataset, // data
			PlotOrientation.VERTICAL, // the plot orientation
			true, // legend
			true, // tooltips
			false // urls
			);

	// set background
	chart.setBackgroundPaint (parseColor (statsManager.getChartBackgroundColor ()));

	// set chart border
	chart.setPadding (new RectangleInsets (10, 5, 5, 5));
	chart.setBorderVisible (true);
	chart.setBorderPaint (parseColor ("#cccccc"));

	// set anti alias
	chart.setAntiAlias (true);

	CategoryPlot plot = (CategoryPlot) chart.getPlot ();

	// set transparency
	plot.setForegroundAlpha (0.7f);
	plot.setAxisOffset (new RectangleInsets (5.0, 5.0, 5.0, 5.0));
	plot.setBackgroundPaint (Color.lightGray);
	plot.setDomainGridlinesVisible (true);
	plot.setDomainGridlinePaint (Color.white);
	plot.setRangeGridlinesVisible (true);
	plot.setRangeGridlinePaint (Color.white);

	// set colour of regular users using Karate belt colour: white, green, blue, brown, black/gold
	CategoryItemRenderer renderer = plot.getRenderer ();
	renderer.setSeriesPaint (0, new Color (205, 173, 0)); // gold users
	renderer.setSeriesPaint (1, new Color (139, 69, 19));
	renderer.setSeriesPaint (2, Color.BLUE);
	renderer.setSeriesPaint (3, Color.GREEN);
	renderer.setSeriesPaint (4, Color.WHITE);

	// set the range axis to display integers only...
	NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis ();
	rangeAxis.setStandardTickUnits (NumberAxis.createIntegerTickUnits ());

	CategoryAxis domainAxis = (CategoryAxis) plot.getDomainAxis ();
	domainAxis.setCategoryLabelPositions (CategoryLabelPositions.DOWN_45);
       domainAxis.setLowerMargin(0.0);
       domainAxis.setUpperMargin(0.0);

       BufferedImage img = chart.createBufferedImage (width, height);
	final ByteArrayOutputStream out = new ByteArrayOutputStream();
	try{
		ImageIO.write(img, "png", out);
	}catch(IOException e){
		log.warn("Error occurred while generating SiteStats chart image data", e);
	}
	return out.toByteArray();
}
 

private byte[] createToolAnalysisChart (int width, int height)
{
	CategoryDataset dataset = getToolAnalysisDataSet ();
	
	if (dataset == null) {
		return generateNoDataChart(width, height);
	}
			
	JFreeChart chart = ChartFactory.createBarChart (
			null, // chart title
			null, // domain axis label
			null, // range axis label
			dataset, // data
			PlotOrientation.HORIZONTAL, // the plot orientation
			false, // legend
			false, // tooltips
			false // urls
	);
	
	// set background
	chart.setBackgroundPaint (parseColor (statsManager.getChartBackgroundColor ()));

	// set chart border
	chart.setPadding (new RectangleInsets (10, 5, 5, 5));
	chart.setBorderVisible (true);
	chart.setBorderPaint (parseColor ("#cccccc"));

	// set anti alias
	chart.setAntiAlias (true);

	CategoryPlot plot = (CategoryPlot) chart.getPlot ();

	// set transparency
	plot.setForegroundAlpha (0.7f);
	plot.setAxisOffset (new RectangleInsets (5.0, 5.0, 5.0, 5.0));
	plot.setBackgroundPaint (Color.lightGray);
	plot.setDomainGridlinesVisible (false);
	plot.setRangeGridlinesVisible (true);
	plot.setRangeGridlinePaint (Color.white);
	
       CategoryAxis domainAxis = plot.getDomainAxis();
       domainAxis.setVisible(false);
       domainAxis.setUpperMargin (0);
       domainAxis.setLowerMargin (0);
       
       NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
       rangeAxis.setUpperMargin(0.20);
	rangeAxis.setStandardTickUnits (NumberAxis.createIntegerTickUnits ());
       
       BarRenderer renderer = (BarRenderer) plot.getRenderer();
       CategoryItemLabelGenerator generator 
           = new StandardCategoryItemLabelGenerator("{1}", 
                   NumberFormat.getInstance(new ResourceLoader().getLocale()));
       renderer.setDefaultItemLabelGenerator(generator);
       renderer.setDefaultItemLabelFont(new Font("SansSerif", Font.PLAIN, 9));
       renderer.setDefaultItemLabelsVisible(true);
       renderer.setItemMargin (0);
       renderer.setSeriesPaint (0, Color.BLUE);
       
       BufferedImage img = chart.createBufferedImage (width, height);
	final ByteArrayOutputStream out = new ByteArrayOutputStream();
	try{
		ImageIO.write(img, "png", out);
	}catch(IOException e){
		log.warn("Error occurred while generating SiteStats chart image data", e);
	}
	return out.toByteArray();
}