Re: communication between turbine servlets and JFreeChart

Michael,
Did this resolve your issue?

Vick

On Mon, Sep 29, 2008 at 9:36 AM, Tony Oslund <[email protected]>wrote:

>
> Try the following instead.
>
> #set ($mysrc = $link.setPage("mrtg,Image.vm"))
> <img src="$mysrc" border="0"/>
>
>
> - or -
>
> Notice the single quotes.
>
> <img src="$link.setPage('mrtg,Image.vm')" border="0"/>
>
> Tony
>
>
> -----Original Message-----
> From: OSullivan, Michael [mailto:[email protected]]
> Sent: Monday, September 29, 2008 7:58 AM
> To: [email protected]
> Subject: communication between turbine servlets and JFreeChart
>
> Hi
>
> I am trying to get my turbine app to display a dynamic chart using =
> Jfreechart and Velocity templating but to no avail. I've been using the
> = example below which was sent via one of the forum threads. I've
> created = a Java Screen class (i.e not an action class) exactly the same
> as in the = attached code and I have included the following image tag in
> my velocity = template but to no avail.=20
>
> <img src="$link.setPage("mrtg,Image.vm")" border="0"/>
>
> To start I would just like to get this example working and then try and
> = add tooltips and url drill down to the image. Should this be possible
> = using the method outlined below. Any help would be greatly
> appreciated.
>
> Thanks
> Regards, Mike
>
>
> ########################################################################
> #=
> #########################################################
>
>
> 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.t
> u=
> rbine.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 =3D (JFreeChart) =
> data.getSession().getAttribute("chart");
>        OutputStream out =3D 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
>
> &lt;img src=3D"$link.setPage("mrtg,Image.vm")" border=3D"0"/&gt;
>
> kind regards=20
>
> J=FCrgen Hoffmann
>
>
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