cewolf charting is pretty cool

If you're looking for a web based charting library, check out cewolf at http://cewolf.sourceforge.net/

It's pretty cool, easy to use and appears to work fine with WAS 5.1 (this doesn't mean IBM supports it, just that I'm using it with no apparent problems). I haven't tried it with WAS 5.0 yet as I'm using an internal 5.1 driver for what I'm doing. I'm knocking an application together right now using struts 1.1 and this and it's working well. Easy to use and produces lots of nice shiny charts easily.

Check it out. Just follow the instructions in the tutorial to put it in a WAR and it seems to just work. I'll post more feedback as I use it more.

Comments

[Biswakalyan]

Hi,

I don not have a link to any document / tutorial which has some examples for knowing the way to use different tags. If you have explored something can you please share your exp with me.

Regards,
Biswa.

[shubhangi]

I want to download cewolf s/w for making gantt chart.

[Michael Wall]

Hi

I'm using cewolf with a struts 1.1 portlet on WPS 4.2 Extend, WAS 4.05. I get a 'message' instead of the charts: 'This chart has expired. Please reload.'

Running the same struts application as a Web Applicaton in local test server works as expected (WebSphere v4.0 Test Environment), WSAD 5.1.

Doesn't seem to be an error, nothing in WAS or WPS logs except standard cewolf debugging, just wondering if you encountered same.

Michael

[omar]

I have problems with cewolf, because, I can use show the graphics in my JSP when in it is under the root of my aplication:
Application
- jsp_with_cewolf
But when it is in other directory.. like:
Application
- jsp
-directory 1
-jsp_with_celf . It doesn't work... please... is there someone that want help me!.
Thanks

[jenny]

nice site. well done.

[jenny]

i enjoy being here. nice place.

[praveen]

i have a problem in cewolf, i worked throught the example thats given in the tutorial, but finally i am not able see the chart. the jsp page starts up and i can see all the data processing is done but i am not able to see the chart alone. in the tutorial it says if u have broken image, check your container's log files. what does this mean?

can anyone help me please

[Mort Coleman]

I have the gantt demo I working but cannot find the type for getting gantt II to render. I suppose that it will use the same data generation class, and just picture it using the rendering engine. Does anyone know the type to use to get gantt II to work?

[Mureed Alem]

It s good but i facing problem in using it with tiles and struts 1.1

[greg]

I have discovered that is you move the jsp to a directory in webapps home the images are broken. However, if you put them in the webapps home directory they work. I found a fix...but am unsure if this is the correct way to handle this. But if you edit your *.jsp page and the line that says something like and change the renderer path to cewolf to something like
../cewolf then it worked. It seems the renderer parameter is a path to the cewolf "home" and cewolf "home" is your webapps root directory. So by changing the path in the renderer parameter I think you can fix the broken image problems. Oh, I have found the "Container logs" are in Tomcats logs directory.

[akshay]

Is there a way to change or set the colors of the bars in gantt chart to something other than red or blue

[anu]

Hi,

I am having problems in generating charts with cewolf( using Weblogic server 8.1, struts 1.1) Works fine for few minutes and then start getting the below error message

'This chart has expired. Please reload.'

[muhammad ali]

i am getting this error when i run the tutorial application in my jbuilder 9

NullPointerException
at de.laures.cewolf.taglib.tags.ChartImgTag.doStartTag

[Joe S]

I am having the same issue with the tutorial that CeWolf provides. I get the following exception:

NullPointerException
at de.laures.cewolf.taglib.tags.ChartImgTag.doStartTag

[smita]

Hi,
I am trying to generate a chart using cewolf in struts based application and I am badly stuck. I need to pass my form object to the produceDataset method to dynamically generate data for my chart. How in the field should I do it? Please heeeeeeeeeelllllpppp.... I have been stuck for last 2 days....

[smita]

hi,
Where should i set the map parameter which the produceDataset takes as input parameter?

[saritha]

hai,

this is saritha from india,
i desperately seek for java api that generates charts using jsp.i need a free version. which i use it for my academics.i do my MCA final year(student)
i am using the following resources for my project
server: tomcat server
db: ms acess
technology: jsp,servelts
pls do reply for this

regards
saritha

[Satyanarayanan]

I am learning to use CEWolf!. I have followed the steps detailed in the tutorial to the last step. But I did not get any result worth the name!?!

Could somebody help me please?

[Satyanarayanan]

I have followed the steps given in the tutorial

But the following error message is displayed!

org.apache.jasper.JasperException: /web/index.jsp(25,4) Unable to load class chart

When I go into "index.jsp" line 25 col 4, this statement does not show any error

Could somebody help me please!?!

[Satyanarayanan]

I would like to know how to use the JDBCPieDataSet,JDBCCategoryDataset and JDBCXYDataset classes for charting purposes!?!

Could you mail me the step-by-step procedure?