Example usage for org.jfree.chart.plot RingPlot setForegroundAlpha

Introduction

In this page you can find the example usage for org.jfree.chart.plot RingPlot setForegroundAlpha.

Prototype

public void setForegroundAlpha(float alpha) 

Source Link

Document

Sets the alpha-transparency for the plot and sends a PlotChangeEvent to all registered listeners.

Usage

From source file:unikn.dbis.univis.visualization.chart.RingChart.java

/**
 * Makes the plot.//from  ww  w  . java  2 s. co m
 */
protected void plot() {
    RingPlot plot = (RingPlot) getChart().getPlot();
    plot.setStartAngle(290);
    plot.setDirection(Rotation.CLOCKWISE);
    plot.setForegroundAlpha(0.5f);
    plot.setNoDataMessage("No data available");
    plot.setLabelGenerator(null);
    plot.setLegendLabelGenerator(new LabelGenerator(createTotal()));
}

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From source file:de.forsthaus.webui.customer.CustomerChartCtrl.java

/**
 * onClick button Ring Chart. <br>
 * /*from   w w  w .  j  a v a 2 s . com*/
 * @param event
 * @throws IOException
 */
public void onClick$button_CustomerChart_RingChart(Event event) throws InterruptedException, IOException {
    // logger.debug(event.toString());

    div_chartArea.getChildren().clear();

    // get the customer ID for which we want show a chart
    long kunId = getCustomer().getId();

    // get a list of data
    List<ChartData> kunAmountList = getChartService().getChartDataForCustomer(kunId);

    if (kunAmountList.size() > 0) {

        DefaultPieDataset pieDataset = new DefaultPieDataset();

        for (ChartData chartData : kunAmountList) {

            Calendar calendar = new GregorianCalendar();
            calendar.setTime(chartData.getChartKunInvoiceDate());

            int month = calendar.get(Calendar.MONTH) + 1;
            int year = calendar.get(Calendar.YEAR);
            String key = String.valueOf(month) + "/" + String.valueOf(year);

            BigDecimal bd = chartData.getChartKunInvoiceAmount().setScale(15, 3);
            String amount = String.valueOf(bd.doubleValue());

            // fill the data
            pieDataset.setValue(key + " " + amount,
                    new Double(chartData.getChartKunInvoiceAmount().doubleValue()));
        }

        String title = "Monthly amount for year 2009";
        JFreeChart chart = ChartFactory.createRingChart(title, pieDataset, true, true, true);
        RingPlot plot = (RingPlot) chart.getPlot();
        plot.setForegroundAlpha(0.5f);
        BufferedImage bi = chart.createBufferedImage(chartWidth, chartHeight, BufferedImage.TRANSLUCENT, null);
        byte[] bytes = EncoderUtil.encode(bi, ImageFormat.PNG, true);

        AImage chartImage = new AImage("Ring Chart", bytes);

        Image img = new Image();
        img.setContent(chartImage);
        img.setParent(this.div_chartArea);

    } else {

        div_chartArea.getChildren().clear();

        final Label label = new Label();
        label.setValue("This customer have no data for showing in a chart!");

        label.setParent(div_chartArea);

    }
}

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