guile + gtk, part II

[Paul Emsley <emsley@ysbl.york.ac.uk>]

	Hi,

	I read the reference manual, and decided that my program was
	sufficiently like the example (dia) that I would follow the
	described method.  I also looked at gtk-guile and guile-gui.

	I used swig to generate the new function names and used a
	gtk-entry (with callback) so that I could type commands.

	I must tell you how totally thrilling it was to type the
	command and for the display DO IT as if I'd gui-ed it.
	Marvellous - I've wanted to be able to do that for a long
	time.

	Now, it seems that I am living in the C world, but gtk-guile
	and guile-gui are in the guile world.  I want to add to my
	program something similar to what guile-gui has - a gtk-entry
	and a gtk-text to capture display the result.  However, I
	can't see how to do this from the C world.

	Incidently, I had problems with void c_inner_main(int argc,
	char** argv) in my c++ program. There was problems relating to
	types and void, I think. I don't have the error code to hand,
	sorry.  I fixed it by having the c++ main calling a c
	c_inner_main routine - it was ugly and i'd rather not do it.
	Is this a known problem?

	It is not clear to me how to add "protection" to the commands
	that I type in the gtk-entry.  Here is how I wrap them (I
	copied this from somewhere):

	  SCM handler = scm_c_eval_string ("(lambda (key . args) "
             "(display (list \"Error in proc:\" key \" args: \" args))
(newline))");
          std::string my_typed_function("(lambda() "); 
          my_typed_function += gtk_entry_get_text(GTK_ENTRY(entry));
          my_typed_function += " )";
          SCM scm_code = scm_c_eval_string(my_typed_function.c_str()); 
          scm_catch(SCM_BOOL_T, scm_code, handler);

	Is that right?

	I want to capture the result and display it in the gtk-text.
	How do I do that?

	So that I could try a different approach (from the
	guile-world), I did make an attempt to recompile my program
	and all its libraries and dependences as PIC libs, but not
	finished (since there was a problem loading the so libraries
	in my previous version of guile).  This is still non-trivial
	for me to do - is it The Right Way To Go?

	Also, I want to read in a myprogramrc file.

	If I use:

           scm_c_primitive_load(file); 

	then that falls over (as you know) if there is a syntax error.
	What should I use instead?

	Thanks for your time, I am at the stage where this is still
	twisting my head into little knots.

	Paul.


	



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