problem signal_connect to notebook
- From: David Taylor <n9506769 garbo nepean uws edu au>
- To: gtk-list redhat com
- Subject: problem signal_connect to notebook
- Date: Mon, 14 Sep 1998 01:37:58 +1000
Hi, I have a strange problem with using the notebook widget.
I am simply trying to create a notebook with many pages and upon each
page I want to display text and a vertical scrollbar. I am trying to
connect some code to the event "switch_page" on the notebook. If I have
code to connect this, as well as the code to append pages, then the
program will not run. It will, however, compile. If I comment out
either the "gtk_signal_connect" line or the "gtk_notebook_append_page"
line it will run.
The following errors are issued upon running:
** WARNING **: invalid cast from `GtkLabel' to `GtkBox'
** ERROR **: sigsegv caught
The following is the problem section of code (with the problem lines
notebook = gtk_notebook_new ();
gtk_signal_connect (GTK_OBJECT (notebook), "switch_page",
GTK_SIGNAL_FUNC (page_switch), NULL);
/* This is one of the two problem lines of code. */
gtk_notebook_set_tab_pos (GTK_NOTEBOOK (notebook), GTK_POS_TOP);
gtk_box_pack_start (GTK_BOX (vbox), notebook, TRUE, TRUE, 0);
gtk_container_border_width (GTK_CONTAINER (notebook), 5);
frame = gtk_frame_new ( pagetitle );
gtk_container_border_width (GTK_CONTAINER (frame), 5);
label = gtk_label_new ( pagetitle );
gtk_notebook_append_page (GTK_NOTEBOOK (notebook), frame,
/* This is the other problem line of code. */
I simply do not understand what is happening in either of those lines to
cause this. The code is copied from testgtk.c, which works.
page_switch is a function that I have copied from the testgtk.c code.
Please help me. If you do I'll give you a cyber hug. :-)
| University of Western Sydney - Nepean |
| firstname.lastname@example.org |
| http://www.cit.nepean.uws.edu.au/~dtaylor/ |
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