Hey again,
The original problem again was dynamically creating an array of blank
strings to be used as an argument in creating a gtkclist widget. The point
was to create some code that could replace:
/**/
char *blankrow[] = {"", "", ""}; // needed for three columns
/**/
...with something else that would build dynamically, assuming I already knew
the value of the number of columns needed.
Based on Flavio's response (thanks Flavio), I did the following...
/**/
int *blankrow;
int ctr;
blankrow = (int *)malloc(vpsql->cols); // vpsql->cols = # of cols
for (ctr=0; ctr<vpsql->cols; ctr++)
{
(char *)blankrow[ctr] = (char *)malloc(2);
sprintf((char *)blankrow[ctr]," ");
}
vpsql->grid = gtk_clist_new_with_titles(vpsql->cols, (char **)blankrow);
/**/
There's a lot of extra casting that I threw in there because of compile
warnings, but the effect is pretty much the same with or without them. The
thing works (thank god), although there are a couple of things that trouble
me.
1. If I substitute the declarations, mallocs and for loop with the
hard-coded alternative above, I get no runtime error messages. However, with
the new declarations, mallocs and for loop, I get the following error
message repeated quite a lot. I cannot quite figure out why...
"Gtk-CRITICAL **: file gtkbindings.c: line 1072 (gtk_pattern_match):
assertion `pspec->match_type < GTK_MATCH_LAST' failed."
There doesn't seem to be any corelation between the number of times this
error message appears, and the number of modifications I've made to the
widget (most notably, gtk_clist_set_text and gtk_clist_set_column_title).
There's only one other occurence of this error message on the internet that
I could find, and it had to do with some guy trying to use the following
code:
/**/
label = gtk_label_new("Start search in:");
gtk_box_pack_start(GTK_BOX(hbox), label, FALSE, FALSE, 5);
gtk_widget_show(label);
/**/
That was all he gave, so I don't really know if the error is somewhere else.
Anyhow, the program is currently working fine, displaying query results
etc., so I'm tempted to let this drop until a later date. But if anyone
knows off the top of their head what this is...?
2. My C skills are really rudimentary, so I have no idea how to free up the
memory I've malloced up there. I've tried a few things, but each time I do
it I get an error. Considering that I'm asking for a very limited amount of
memory, it's tempting to just let it go, but I suppose that wouldn't be
proper.
Thanks once again for all the responses. It was really helpful, and the
widget is coming along nicely, if noisily.
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