Example usage for org.jfree.chart ChartUtilities writeChartAsPNG

Introduction

In this page you can find the example usage for org.jfree.chart ChartUtilities writeChartAsPNG.

Prototype

public static void writeChartAsPNG(OutputStream out, JFreeChart chart, int width, int height,
        boolean encodeAlpha, int compression) throws IOException 

Source Link

Document

Writes a chart to an output stream in PNG format.

Usage

From source file:org.apache.qpid.disttest.charting.writer.ChartWriter.java

public void writeChartToFileSystem(JFreeChart chart, ChartingDefinition chartDef) {
    OutputStream pngOutputStream = null;
    try {/*from  w w w. jav a  2 s .com*/
        File pngFile = new File(_chartDirectory, chartDef.getChartStemName() + ".png");
        pngOutputStream = new BufferedOutputStream(new FileOutputStream(pngFile));
        ChartUtilities.writeChartAsPNG(pngOutputStream, chart, 600, 400, true, 0);
        pngOutputStream.close();

        _chartFilesToChartDef.put(pngFile, chartDef);

        LOGGER.info("Written {} chart", pngFile);
    } catch (IOException e) {
        throw new ChartingException("Failed to create chart", e);
    } finally {
        if (pngOutputStream != null) {
            try {
                pngOutputStream.close();
            } catch (IOException e) {
                throw new ChartingException("Failed to create chart", e);
            }
        }
    }
}

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From source file:org.opentaps.common.reporting.ChartViewHandler.java

/**
 * Encode chart as image/png and send it to browser
 *
 * @param chartContext/*from   w  ww  .j  a  v a2 s .  c om*/
 * @param response
 * @throws IOException
 */
protected void sendChart(Map<String, Object> chartContext, HttpServletResponse response) throws IOException {

    JFreeChart chartObject = (JFreeChart) chartContext.get("chartObject");
    Integer width = (Integer) chartContext.get("width");
    Integer height = (Integer) chartContext.get("height");
    Boolean encodeAlpha = (Boolean) chartContext.get("alphaCompression");
    Integer compressRatio = (Integer) chartContext.get("compressRatio");

    if (chartObject != null && width.compareTo(0) > 0 && height.compareTo(0) > 0) {
        response.setContentType("image/png");
        if (encodeAlpha != null
                || (compressRatio != null && compressRatio.intValue() >= 0 && compressRatio.intValue() <= 9)) {
            ChartUtilities.writeChartAsPNG(response.getOutputStream(), chartObject, width, height,
                    encodeAlpha.booleanValue(), compressRatio.intValue());
        } else {
            ChartUtilities.writeChartAsPNG(response.getOutputStream(), chartObject, width, height);
        }
    }
}

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From source file:eu.delving.ChartEngine.java

private void writePNG(OutputStream outputStream, JFreeChart chart) throws IOException {
    ChartUtilities.writeChartAsPNG(outputStream, chart, width, height, true, ImageWriteParam.MODE_DEFAULT);
}

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From source file:org.jrecruiter.web.CustomChartResult.java

/**
 * Executes the result. Writes the given chart as a PNG or JPG to the servlet output stream.
 *
 * @param invocation an encapsulation of the action execution state.
 * @throws Exception if an error occurs when creating or writing the chart to the servlet output stream.
 *//*w  w w.ja v  a  2  s .  c o  m*/
public void execute(ActionInvocation invocation) throws Exception {
    if (!chartSet) { // if our chart hasn't been set (by the testcase), we'll look it up in the value stack
        chart = (JFreeChart) invocation.getStack().findValue(value, JFreeChart.class);
    }
    if (chart == null) {// we need to have a chart object - if not, blow up
        throw new IllegalArgumentException("No JFreeChart object found on the stack with name " + value);
    }
    // make sure we have some value for the width and height
    if (height == null) {
        throw new IllegalArgumentException("No height parameter was given.");
    }
    if (width == null) {
        throw new IllegalArgumentException("No width parameter was given.");
    }

    // get a reference to the servlet output stream to write our chart image to
    OutputStream os = ServletActionContext.getResponse().getOutputStream();
    try {
        // check the type to see what kind of output we have to produce
        if ("png".equalsIgnoreCase(type)) {
            ChartUtilities.writeChartAsPNG(os, chart, width, height, true, 0);
        } else if ("jpg".equalsIgnoreCase(type) || "jpeg".equalsIgnoreCase(type)) {
            ChartUtilities.writeChartAsJPEG(os, chart, width, height);
        } else {
            throw new IllegalArgumentException(
                    type + " is not a supported render type (only JPG and PNG are).");
        }
    } finally {
        if (os != null)
            os.flush();
    }
}

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From source file:gsn.vsensor.ChartVirtualSensor.java

/**
 * Plots the chart and sends it in the form of ByteArrayOutputStream to
 * outside./*from  ww w.j a  v  a 2 s. co m*/
 * 
 * @return Returns the byteArrayOutputStream.
 */
public synchronized ByteArrayOutputStream writePlot() {
    if (!changed)
        return byteArrayOutputStream;
    byteArrayOutputStream.reset();
    try {
        ChartUtilities.writeChartAsPNG(byteArrayOutputStream, chart, width, height, false, 8);

    } catch (IOException e) {
        logger.warn(e.getMessage(), e);
    }
    return byteArrayOutputStream;
}

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From source file:org.opennms.netmgt.charts.ChartUtils.java

/**
 * Helper method that returns the JFreeChart to an output stream written in JPEG format.
 *
 * @param chartName a {@link java.lang.String} object.
 * @param out a {@link java.io.OutputStream} object.
 * @throws org.exolab.castor.xml.MarshalException if any.
 * @throws org.exolab.castor.xml.ValidationException if any.
 * @throws java.io.IOException if any.//from   w w  w.  j  a  va 2 s  .  c o  m
 * @throws java.sql.SQLException if any.
 */
public static void getBarChartPNG(String chartName, OutputStream out)
        throws MarshalException, ValidationException, IOException, SQLException {
    ChartFactory.setChartTheme(StandardChartTheme.createLegacyTheme());
    BarChart chartConfig = getBarChartConfigByName(chartName);
    JFreeChart chart = getBarChart(chartName);
    if (chartConfig.getChartBackgroundColor() != null) {
        setChartBackgroundColor(chartConfig, chart);
    }

    if (chartConfig.getPlotBackgroundColor() != null) {
        setPlotBackgroundColor(chartConfig, chart);
    }
    ImageSize imageSize = chartConfig.getImageSize();
    int hzPixels;
    int vtPixels;

    if (imageSize == null) {
        hzPixels = 400;
        vtPixels = 400;
    } else {
        hzPixels = imageSize.getHzSize().getPixels();
        vtPixels = imageSize.getVtSize().getPixels();
    }

    ChartUtilities.writeChartAsPNG(out, chart, hzPixels, vtPixels, false, 6);

}

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