g_object_get_data changed data association
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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Re: g_object_get_data changed data association
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
_
Keep your kids safer online with Windows Live Family Safety.
http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_family_safety_072008
___
gtk-app-devel-list mailing list
gtk-app-devel-list@gnome.org
http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
___
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