JFreeChartWrapper - addComponent() is undefined

Flow
1

Hi :slight_smile:

Before I explain my problem here is my configuration:

  • Eclipse Luna (latest version) with Ivy and Vaadin 7 (all up to date)
  • Debian 7 Wheezy 64bit
  • Java 8 (Oracle version)
  • Tomcat 8

I’m just started working with Vaadin (Ivy too :D) and I wanted to create a simple chart. There is a huge amount of addons out there some of which pretty expensive and others - for free. I found the JFreeChartWrapper and decided on using it. For this purpose I also looked for examples and found
this one
. The description of the add-on says I have to also include the complete JFreeChart in my
ivy.xml
:

<ivy-module> <dependencies> ... <dependency org="org.vaadin.addon" name="jfreechartwrapper" rev="3.0.2" /> ... </dependencies> </ivy-module Eclipse does not report any dependecy issues whatsoever. Hower it complains when I try to add the JFreeChartWrapper to the custom
Panel
 called
JFreeChartWrapperSample
 (see link with example above). The tip Eclipse gives me is:


The method addComponent(JFreeChartWrapper) is undefined for the type JFreeChartWrapperSample

The complete error that appears upon executing the project on my Tomcat server (running on localhost) is telling me that a ServletException was thrown (
java.lang.Error
) due to an unresolved compilation problem namely that addComponent() is not defined for the JFreeChartWrapper. I have worked only with CustomComponent and Views (in Navigator) to implement something more customized but never implemented a Panel myself so I might be missing something here that is not JFreeChartWrapper related. I see that other people manage to get it up and running so the problem is obviously in something that I did (not do). In the example above I have included only the
createBasicDemo()
 part including everything that is used in it to keep things as compact as possible.

EDIT: Further investigation told me to look at the declaration of the Panel class. For my surprise there is actually not a single addComponent() that has been overriden so this method comes from the AbstractSingleComponentContainer class which it extends. Since the Panel class does not override this particular method I can safely presume that it doesn’t need more that its super class is offering.

Thanks for your time,
AA

2

Hello,

Sample you are using is for Vaadin 6. That’s why you get compilation errors. Panel uses now a setcontent() instead of addComponent().

Anyway fixing this code to be working with Vaadin 7 should be as simple as :

public JFreeChartWrapperSample()
{

VerticalLayout layout = new VerticalLayout();
layout.setSizeFull();
layout.addComponent(createBasicDemo());
layout.addComponent(getLevelChart());
layout.addComponent(regressionChart());

setContent(layout);

}

…Not tested anyway :wink:

Regards
Sebastien

3

Thank you so much. I had to do one additional step described by @Matti Tahvonen
here
. I have Vaadin 7.4.3 and the issue described in that thread is still present.

Thanks again! Your reply was really helpful! Now I’m going back to my charts. :stuck_out_tongue: