The image cannot be displayed -Netscape 7.01

Shawn · Post by **Shawn** » Tue Jan 14, 2003 11:20 am

Hello,

I am getting a problem with the JFreeChart in Netscape 7.01. (also tested with NS 6.0)
I get the message "The image ............ cannot be diaplayed, because it contains errors".
The chart works fine in IE. Before I upgraded to the newer version, the one containing the image map and tooltips, this was working fine in Netscape. I thought initially that it might be a problem with the tooltips not being able to be displayed so I set the boolean tooltips parameter on ChartFactory.createVerticalBarChart to false hoping this will solve the problem, but it doesn't.

Does anyone know what else I should look out for or anyone know what the problem is?

Thankyou.
Shawn

Shawn · Post by **Shawn** » Tue Jan 14, 2003 12:08 pm

should have mentioned that the version I am using is 0.9.4

Shawn

David Gilbert · Post by **David Gilbert** » Wed Jan 15, 2003 10:50 am

I'm not sure what the problem is. Does it fail with JPEG, PNG or both?

Regards,

Dave Gilbert

Dan · Post by **Dan** » Fri Jan 17, 2003 12:25 pm

I work with Shawn and have been experiencing the same problems, the graph displays fine in IE6 but not in Netscape6 or 7 or Mozilla.

It happens with both JPEG and PNG.

I found this but the solution given was already set in my browser. http://mozilla.gunnars.net/mozfaq_use.html#imageerror

So we are both still stuck.

Thanks for the reply and let us know if you think of anything.

Dan

Richard Atkinson · Post by **Richard Atkinson** » Fri Jan 17, 2003 1:57 pm

Have you tried using the example WAR file at http://homepage.ntlworld.com/richard_c_ ... freechart/?

I have tested the WAR file with Netscape 7, Opera and IE and it works fine with all of them. I have also heard reports that it works fine with Mozilla as well.

Regards,
Richard...

Richard Atkinson · Post by **Richard Atkinson** » Fri Jan 17, 2003 3:48 pm

Having read the Mozilla bug report I suspect the problem is that you application is designed in such a way that requesting the image again without re-requesting the page is causing a problem. You might want to look at the classes in com.jrefinery.chart.servlet which are designed to avoid this by persisting charts to the temporary directory and using the DisplayChart servlet to stream charts back to the browser. It is not possible to predict when browsers will re-request images without requesting the page. It happens most frequently when printing pages (you may want to try that with your application using IE - I suspect your charts will not print correctly).

I hope this helps,
Regards,
Richard...

Dan · Post by **Dan** » Tue Jan 21, 2003 4:30 pm

Thanks for the advice.

Yes, I can view the WAR file provided in all my browsers and I am now trying to implement the code to persist charts to the temporary directory.

I can, however, print the charts as they are in IE without any problems. I don't know if this is significant.

I'll let you know how I get on,
Thanks a lot
Dan

Dan · Post by **Dan** » Tue Jan 21, 2003 6:01 pm

Thanks a lot for your help the code worked perfectly.

Dan and Shawn

Dan · Post by **Dan** » Wed Jan 22, 2003 11:20 am

Sorry my mistake only the png chart images are being displayed without any html and therefore without the image maps. Below is the code I am using. If you have any suggestions I would really appreciate it.

Thanks
Dan

HttpSession session = request.getSession();

JFreeChart chart = createChart( quarter, groupCode, viewName, practicecode, startDate, endDate, request, type, initGradColor, finalGradColor );
ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());

int width = 900;
int height = 500;

String fileName = General.getUniqueFileName("Output",10,".png");
String realFileName = getServletContext().getRealPath(fileName);

FileOutputStream fileOut = new FileOutputStream(realFileName);

ChartUtilities.writeChartAsPNG(fileOut, chart, width, height);

fileOut.close();

realFileName = ServletUtilities.searchReplace(realFileName, "..", "");

File file = new File(realFileName);
if (!file.exists()) {
throw new ServletException("File '" + file.getAbsolutePath()
+ "' does not exist");
}

ServletUtilities.sendTempFile(file, response);

ChartUtilities.saveChartAsPNG(file, chart, width, height, info);

PrintWriter out = response.getWriter();

CommonHTML ch = new CommonHTML(out);

out.println("<html>");
out.println("<head>");
out.println(" <title>Groups Chart</title>");
ch.writeCSS();
out.println("</head>");
out.println("<body>");
ChartUtilities.writeImageMap(out, "map", info);
out.println(" <IMG src=\"../" + fileName + "\" usemap=\"#map\" border=0>");
out.println("</body>");
out.println("</html>");
out.close();

www.jfree.org

The image cannot be displayed -Netscape 7.01

The image cannot be displayed -Netscape 7.01

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Re: The image cannot be displayed -Netscape 7.01

Re: The image cannot be displayed -Netscape 7.01

Re: The image cannot be displayed -Netscape 7.01

Re: The image cannot be displayed -Netscape 7.01