RE: [Java-gnome-developer] Pb with call back signature for insert _text signal.

[Jeffrey M. <Jef...@Br...>]

I have the solution for the problem you were encountering.
The callback insert_text has a signature of:

void (*insert_text) 	(GtkEditable *editable,
			   	const char *text,
			   	gint length,
				gint *position);

Your callback needs to be changed to the following:

public void insert_text(String text, int length, 
				GtkObject position)

As you can see, the final argument is not handled
correctly.  This is due to the fact that it is a 
pointer.  In the callback code I cannot determine
the actual type of the data for the pointer.  This
makes the position parameter useless.

Hope this helps.

-Jeff


> 
> Jeffrey Morgan wrote:
> 
>  > Is the printout below taken directly from the output
>  > when you run the app?
> 
> 
> Yes.
> 
>  > If so, you possibly have a serious
>  > problem with your JVM.  The part of the output that
>  > reads "ILgnu/gtk/GtkObject" is very strange.
> 
> 
> Yes, I had been wondering if that was normal or not...
> 
> I have recompiled and reinstalled Java Gnome and retried my small app 
> with another JVM (Sun jdk1.3.1_01 instead of IBM jdk 1.3) 
> with the same 
> result (same error message with the same strange formating).
> 
>  > Can
>  > you send me the entire example and I'll take a look at
>  > it.
> 
> 
> Sure, it's minimal and directly adapted from the samples.
> 
> I attach the java source and the glade widget definition.
> 
> Thanks
> 
> Eric
> 
> 
>  >
>  > -Jeff
>  >
>  >  > However, at run time, my insert_text method isn't found:
>  >  >
>  >  > vdv@evlist:~/Projects/project1$ java Edit
>  >  > *** ERROR ***:  Java-GNOME - cannot find callback method
>  >  > insert_text in
>  >  > the specified object with signature
>  >  > (Ljava/lang/String;ILgnu/gtk/GtkObject;)V
>  >  > *** ERROR ***:  Java-GNOME - exception is:
>  >  > Exception in thread "main" java.lang.NoSuchMethodError: 
> insert_text
>  >  >       at gnu.gdk.BaseObject.signalConnect(Native Method)
>  >  >       at Edit.<init>(Edit.java:12)
>  >  >       at Edit.main(Edit.java:77)
>  >  >
>  >  > ** WARNING **:  Java-GNOME - signal will not be mapped
>  >  >
>  >
> 
> -- 
> See you in Scottsdale, Arizona.
>        
> http://xmlconnections.com/xml/xmlfall2001/speakers.asp#evandervlist
> --------------------------------------------------------------
> ----------
> Eric van der Vlist       http://xmlfr.org            
> http://dyomedea.com
> http://xsltunit.org      http://4xt.org           
> http://examplotron.org
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