Hi Jasper You were right, the error was in the construction of the button.
Thanks for your help, I am good to go now! -Patrick On 07/19/2015 04:09 PM, Jasper St. Pierre wrote:
Well, you're passing something that isn't a GtkWidget to sig_con1. The type of the pointer should not matter as long as it points to a GtkWidget (some secret sauce under the hood is used to know whether it's a valid pointer or not). We would need to see what calls sig_con1 to debug further, but look there. On Sun, Jul 19, 2015 at 12:15 PM, Patrick <[email protected]> wrote:Hi Everyone I am doing something strange. I am mixing C GTK and COBOL. It's GnuCOBOL and it compiles to intermediate C. I can create widgets by creating pointers in COBOL and passing them to C GTK functions and such but I can't seem to connect signals. This code: int sig_con1( GtkWidget * widget_id ) { g_signal_connect(G_OBJECT(widget_id),"clicked", G_CALLBACK(handler1_to_handler2),NULL); ..... compiles but when it runs I get : (anak:18978): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GObject' (anak:18978): GLib-GObject-WARNING **: instance with invalid (NULL) class pointer COBOL is actually passing in a void pointer so widget_id is actually type void. I can't seem to cast it to a pointer to a G_OBJECT. Changing the functions prototype to void * widget_id did not help. Could anyone give me a tip or two of how to cast ? Thanks-Patrick _______________________________________________ gtk-list mailing list [email protected] https://mail.gnome.org/mailman/listinfo/gtk-list
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