[Insight-users] Redirect OutputWindow in Java?

[Aron Helser]

I've come to the conclusion that what I wanted to do is impossible.
There is no way to derive from an Itk class in Java and influence the
behavior of the underlying C class, because of the underlying JNI layer
- there are static methods that get called by the Java classes that
essentially act like plain function calls. And besides that, I was
creating the itkOutputWindow object so that it's internal data was null,
anyway - you have to use the itkOutputWindow_Pointer object to get a
functional object.

Hope this helps the one other person who is trying to use itk via the
java wrappers. :-)

This issue might be worthy of consideration in this project, too:
http://www.itk.org/Wiki/Proposals:Logging

-Aron

Aron Helser wrote:
> I'm trying to redirect or at least disable the OutputWindow in itk 
> wrapped for Java.
> I create a class like this:
>
> public class ItkConsoleOutput extends itkOutputWindow {
>  public ItkConsoleOutput() {
>    super();
>  }
>
>  public void DisplayDebugText(String arg0) {
>    System.out.println("ITK debug: " + arg0);
>  }
>
>    //.... similar for other output types.....
> }
>
> Then set it up as I create my ITK handler object, in the constructor:
> public class ItkLoader {
> private static ItkConsoleOutput ms_OutputWindow = null;
>
>  public ItkLoader() {
>        // initialize output from ITK library to go to console.
>        if (ms_OutputWindow == null) {
>            ms_OutputWindow = new ItkConsoleOutput();
>            itkOutputWindow.SetInstance(ms_OutputWindow);
>            //itkOutputWindow.SetInstance(null); // doesn't make any 
> difference either.
>        }
>  }
> }
>
> I still get a blank OutputWindow showing up sometimes, with no 
> messages in it and not responding to the mouse. I'm integrating into a 
> large app that primarily uses a Swing interface.
>
> Any idea how to make this work? Do I need to just hack the 
> itkOutputWindow.java file generated by Swig?
>
> Regards,
> Aron
>