Hi,
here is a simple example:
package de.byteaction.modules.screens.mrtg;
import org.apache.turbine.modules.screens.RawScreen;
import org.apache.turbine.util.RunData;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import java.io.OutputStream;
/**
* @author buddy
*/
public class Image extends RawScreen
{
/* (non-Javadoc)
* @see
org.apache.turbine.modules.screens.RawScreen#getContentType(org.apache.turbine.util.RunData)
*/
protected String getContentType(RunData data)
{
return "image/jpeg";
}
/* (non-Javadoc)
* @see
org.apache.turbine.modules.screens.RawScreen#doOutput(org.apache.turbine.util.RunData)
*/
protected void doOutput(RunData data) throws Exception
{
JFreeChart chart = (JFreeChart) data.getSession().getAttribute("chart");
OutputStream out = data.getResponse().getOutputStream();
ChartUtilities.writeChartAsJPEG(out, chart, 800, 400);
out.flush();
}
}
I have build the chart inside my action and put it into the users Session. You could
do that using data.getUser().setTemp("image"),JFreeChart) also.
Then I have setup the screen like this. Now I can reference the screen in my image tags
<img src="$link.setPage("mrtg,Image.vm")" border="0"/>
kind regards
J�rgen Hoffmann
Am Fr, den 14.05.2004 schrieb Pradeep Kumar um 5:38:
> Hi,
>
> This is my first mail to list...if my suggestions are too obvious
> please ignore them.
>
> we are developing some application using turbine and we have used jfree
> chart.
> addition to info you are passing we are passing
> <.......pluginspage="http://www.adobe.com/svg/viewer/install/";
> type="image/svg+xml" src=...." />.
> How you are sending image info.....type depends on that.
>
> I hope this will work for you.
>
> Thanks,
> Pradeep Kumar Chaturvedi
>
> >>> [EMAIL PROTECTED] 5/14/2004 1:09:24 AM >>>
> Hello list,
>
>
> I'm intergrating JFreeChart into a Turbine application. The JFreeChart
>
> folks have a suggested way of streaming a PNG graphic, such that you
> can
> serve up a dynamic graphic by referenceing your graphic generating
> servlet within a image tag... <img src=\"ChartGenerator?type=" + param
> + "/>
>
> My problem is I need to pass more information than what could be passed
>
> in URL parameters. Does anyone have suggestions as to how I could
> accomplish this?
>
>
> Dave Harris
>
>
>
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