Hi, Check that your list store is properly refcounted, is there any
reason why the list store may have been destroyed previous
to this call ?
Cheers,
-Tristan
On Fri, Jul 25, 2008 at 10:41 AM, YU WU <[EMAIL PROTECTED]> wrote:
> dear sir or madam,
>
> i am developing applications with GTK+ and have some problem, following is
> some digest of my code.
>
> =====================================
> store = gtk_list_store_new(NUMS_MAX_FORCE, G_TYPE_STRING, G_TYPE_STRING,
> G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING,
> G_TYPE_STRING);
> g_object_set_data(G_OBJECT(window), "staad_max_force_store", store);
> printf("## start store memory=%p\n", g_object_get_data(G_OBJECT(window),
> "staad_max_force_store"));
> printf("## is store=%d\n", GTK_IS_LIST_STORE(store));
> printf("## name store=%s\n", G_OBJECT_TYPE_NAME(store));
> =====================================
>
> i install a list store by above codes. then i want to update the list store
> somewhere later.
>
> =====================================
> /* for debug */
> if(g_object_get_data(G_OBJECT(widget), "staad_max_force_store") == NULL)
> printf("NULL\n");
> else
> {
> printf("store memory=%p\n", g_object_get_data(G_OBJECT(widget),
> "staad_max_force_store"));
> printf("## name store=%s\n",
> G_OBJECT_TYPE_NAME(g_object_get_data(G_OBJECT(widget),
> "staad_max_force_store")));
> }
>
> while(curr_data)
> {
> i = 0;
>
> curr_item = curr_data->content;
> while(curr_item)
> {
> gtk_list_store_append(store, &iter);
> if(++i == 1)
> {
> gtk_list_store_set(store, &iter, MAX_FORCE_MEM_NUM, (local1 =
> char_to_utf8 (curr_data->mem_num)), MAX_FORCE_ITEM, (local2 = char_to_utf8
> (curr_item->item)), MAX_FORCE_FX, (local3 = char_to_utf8 (curr_item->FX)),
> MAX_FORCE_FY, (local4 = char_to_utf8 (curr_item->FY)), MAX_FORCE_FZ, (local5
> = char_to_utf8 (curr_item->FZ)), MAX_FORCE_MX, (local6 = char_to_utf8
> (curr_item->MX)), MAX_FORCE_MY, (local7 = char_to_utf8 (curr_item->MY)),
> MAX_FORCE_MZ, (local8 = char_to_utf8 (curr_item->MZ)), -1);
> g_free(local8);
> }
> else
> gtk_list_store_set(store, &iter, MAX_FORCE_ITEM, (local1 =
> char_to_utf8 (curr_item->item)), MAX_FORCE_FX, (local2 = char_to_utf8
> (curr_item->FX)), MAX_FORCE_FY, (local3 = char_to_utf8 (curr_item->FY)),
> MAX_FORCE_FZ, (local4 = char_to_utf8 (curr_item->FZ)), MAX_FORCE_MX, (local5
> = char_to_utf8 (curr_item->MX)), MAX_FORCE_MY, (local6 = char_to_utf8
> (curr_item->MY)), MAX_FORCE_MZ, (local7 = char_to_utf8 (curr_item->MZ)), -1);
> g_free(local1);
> g_free(local2);
> g_free(local3);
> g_free(local4);
> g_free(local5);
> g_free(local6);
> g_free(local7);
>
> curr_item = curr_item->next;
> }
> curr_data = curr_data->next;
> }
>
> =====================================
>
> after using "g_object_get_data(G_OBJECT(widget), "staad_max_force_store")", i
> hope to get the store i defined at the beginning. but in fact i didn't get
> the list store, but something else -- instead of a list store. of course, the
> store can't be updated.
>
> from my debug info, the data gotten from "g_object_get_data(G_OBJECT(widget),
> "staad_max_force_store")" has the same memory address with that defined
> "g_object_set_data(G_OBJECT(window), "staad_max_force_store", store);", but
> "G_OBJECT_TYPE_NAME(store)" changed.
>
> so, i would like to know if there is hint to be used for "g_object_get_data"
> and "g_object_set_data". what could be the problem?
>
> p.s.: in my program, there is public area -- a gtkbox to be used by all
> sub-program. if i always run the above sub-program, the problem mentioned
> above won't come up. but, if i run the above sub-program first, then change
> to another sub-program, and later i come back to the above sub-program, the
> above problem comes up. during this process, i used "gtk_widget_destroy" to
> destroy the widget of the first sub-program in the public area and build the
> widget for the next coming sub-program. i am wondering if the
> "gtk_widget_destroy" disturbs the data associations table.
>
> i think my question is a little confusing because i could not describe the
> question clearly enough. i do hope you could read my words above and try to
> give me some suggestion. thanks a lot.
>
> looking forward to your reply.
>
> best regards,
>
> wu yu
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