Re: problem when I remove a widget from a container

[Benat <bialadogs yahoo com>]

Hello:

gtk_container_remove should allready have destroyed the widget.

Regards 

Beñat

On Wed, 2002-04-10 at 23:13, Stephane Pontier wrote:
> hi,
> I have a problem to destroy a widget, I create a Clist in a function:
> create_func{...
> GtkWidget *clist;
> ...
> clist = gtk_clist_new_with_titles(g_list_length(Columns), Textes);
> gtk_container_add(GTK_CONTAINER(main_gui.scrolled_window_games), clist);
> ...
> }
> 
> and in another function, I'm trying to destroy this Clist after removed
> it from his scrolledwindow
> 
> destroy_func{...
> GtkWidget *displayed_list;
> displayed_list = GTK_WIDGET(GTK_BIN(main_gui.scrolled_window_games)->child);
> ...
> gtk_widget_hide(displayed_list);
> gtk_clist_clear(GTK_CLIST(displayed_list));
> gtk_container_remove(GTK_CONTAINER(main_gui.scrolled_window_games),displayed_list);
> gtk_widget_destroy(displayed_list);
> displayed_list = NULL;
> ...
> }
> 
> but I obtain a warning from gtk:
> Gtk-CRITICAL **: file gtkwidget.c: line 1388 (gtk_widget_destroy):
> assertion `GTK_IS_WIDGET (widget)' failed.
> 
> so I tried to test if the displayed list was a widget in the destroy
> function:
> {...
> GtkWidget *displayed_list;
> displayed_list = GTK_WIDGET(GTK_BIN(main_gui.scrolled_window_games)->child);
> ...
> gtk_widget_hide(displayed_list);
> gtk_clist_clear(GTK_CLIST(displayed_list));
> 
> if (GTK_IS_WIDGET(displayed_list))
>      printf("should be OK\n");
> else
>      printf("oups its not a widget anymore\n");
> 
> gtk_container_remove(GTK_CONTAINER(main_gui.scrolled_window_games),displayed_list);
> 
> if (GTK_IS_WIDGET(displayed_list))
>      printf("should have been OK\n");
> else
>      printf("oups its not a widget anymore\n");
> 
> gtk_widget_destroy(displayed_list);
> ...
> }
> 
> and I obtain this:
> should be OK
> oups its not a widget anymore
> 
> Gtk-CRITICAL **: file gtkwidget.c: line 1388 (gtk_widget_destroy):
> assertion `GTK_IS_WIDGET (widget)' failed.
> 
> why after removing the widget from the container, it's not a widget
> anymore, did I forgot something or made a mistake somewhere?
> Thanks
> 
> Stéphane Pontier
> 
> 
> 
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