Re: treeview: seg fault When Collapsing a Row Containg a Selected Item
>>> I have a treeview/treestore containing many top-level rows. Each
>>> top-level row contains many children. The treeview works fine except
>>> for one thing. If the user expands a top-level row, selects a child,
>>> and then collapses that row the program seg faults with the console
>>> error:
>>>
>>> gtk_tree_store_get_value: assertion `iter->stamp == GTK_TREE_STORE
>>> (tree_model)->stamp' failed
>>> gtype.c:3351: type id `0' is invalid
>>> can't peek value table for type `' which is not currently
>>> referenced
>> void
>> TeamSelected2 (GtkTreeSelection *selection) {
>> GtkTreeModel *model;
>> GtkTreePath *path;
>> GtkTreeIter iter;
>> gint sub, row_count, x;
>> gchar *teamname, path_str[10] = " ";
>> gboolean valid;
>>
>> gtk_tree_selection_get_selected (selection, &model, &iter);
> The gtk_tree_selection_get_selected() api returns TRUE is something is
> selected. You never checked its return value!
That's the ticket! I appreciate your help.
--
Marshall Lake -- [EMAIL PROTECTED] -- http://mlake.net
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Re: treeview: seg fault When Collapsing a Row Containg a Selected Item
On Sun, 2007-06-17 at 09:37 -0400, Marshall Lake wrote:
> >> I have a treeview/treestore containing many top-level rows. Each
> >> top-level row contains many children. The treeview works fine except
> >> for one thing. If the user expands a top-level row, selects a child,
> >> and then collapses that row the program seg faults with the console
> >> error:
> >>
> >> gtk_tree_store_get_value: assertion `iter->stamp == GTK_TREE_STORE
> >> (tree_model)->stamp' failed
> >> gtype.c:3351: type id `0' is invalid
> >> can't peek value table for type `' which is not currently
> >> referenced
>
> > Without seeing the code I can only guess. I seems that the iter your
> > using is invalid -- or no longer valid. This could occur if you used a
> > LOCAL variable to create the iter; then saved the pointer of that inter
> > and tried to use it somewhere else which creates the segfault.
> >
> > To poke around looking for it, use this api to test iters before use:
> > bool=gtk_tree_store_iter_is_valid(GtkTreeStore *tree_model, GtkTreeIter
> > *iter)
>
> I apologize for not posting the code originally. See below.
>
> I don't quite understand how the gtk_tree_store_iter_is_valid() function
> will help me since the seg fault occurs when the top-level row is
> collapsed and is (seemingly ?) out of my control.
>
>
>
> void
> TeamSelected2 (GtkTreeSelection *selection) {
> GtkTreeModel *model;
> GtkTreePath *path;
> GtkTreeIter iter;
> gint sub, row_count, x;
> gchar *teamname, path_str[10] = " ";
> gboolean valid;
>
> gtk_tree_selection_get_selected (selection, &model, &iter);
The gtk_tree_selection_get_selected() api returns TRUE is something is
selected. You never checked its return value!
consider doing this:
if (selection == NULL) {
return;
}
if ( !( gtk_tree_selection_get_selected (selection, &model, &iter) ) )
{
return;
}
> gtk_tree_model_get (model, &iter, NAME_COLUMN, &teamname, -1);
>
> if (strlen (teamname) == 4)
> /* user clicked on a year */
> return;
>
Not sure what your looking for here? you already have the iter to the selected
row?
>
> for (sub = row_count = 0; sub < toplevelentries; sub++, row_count = 0) {
> /* walk through the root level of data (years) */
> sprintf (&path_str[0], "%d:0", sub);
> path = gtk_tree_path_new_from_string (&path_str[0]);
>
> valid = gtk_tree_model_get_iter (model, &iter, path);
> while (valid) {
> /* walk through the sub-level (teams), looking for the selected
> row */
> if (gtk_tree_selection_iter_is_selected (selection, &iter) ==
> TRUE)
> /* get out of the for() loop */
> goto GetOutFor;
>
> row_count++;
> valid = gtk_tree_model_iter_next (model, &iter);
> }
> }
> GetOutFor:
>
> [do some processing and return]
>
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Re: treeview: seg fault When Collapsing a Row Containg a Selected Item
>> I have a treeview/treestore containing many top-level rows. Each
>> top-level row contains many children. The treeview works fine except
>> for one thing. If the user expands a top-level row, selects a child,
>> and then collapses that row the program seg faults with the console
>> error:
>>
>> gtk_tree_store_get_value: assertion `iter->stamp == GTK_TREE_STORE
>> (tree_model)->stamp' failed
>> gtype.c:3351: type id `0' is invalid
>> can't peek value table for type `' which is not currently referenced
> Without seeing the code I can only guess. I seems that the iter your
> using is invalid -- or no longer valid. This could occur if you used a
> LOCAL variable to create the iter; then saved the pointer of that inter
> and tried to use it somewhere else which creates the segfault.
>
> To poke around looking for it, use this api to test iters before use:
> bool=gtk_tree_store_iter_is_valid(GtkTreeStore *tree_model, GtkTreeIter
> *iter)
I apologize for not posting the code originally. See below.
I don't quite understand how the gtk_tree_store_iter_is_valid() function
will help me since the seg fault occurs when the top-level row is
collapsed and is (seemingly ?) out of my control.
void
TeamSelected2 (GtkTreeSelection *selection) {
GtkTreeModel *model;
GtkTreePath *path;
GtkTreeIter iter;
gint sub, row_count, x;
gchar *teamname, path_str[10] = " ";
gboolean valid;
gtk_tree_selection_get_selected (selection, &model, &iter);
gtk_tree_model_get (model, &iter, NAME_COLUMN, &teamname, -1);
if (strlen (teamname) == 4)
/* user clicked on a year */
return;
for (sub = row_count = 0; sub < toplevelentries; sub++, row_count = 0) {
/* walk through the root level of data (years) */
sprintf (&path_str[0], "%d:0", sub);
path = gtk_tree_path_new_from_string (&path_str[0]);
valid = gtk_tree_model_get_iter (model, &iter, path);
while (valid) {
/* walk through the sub-level (teams), looking for the selected
row */
if (gtk_tree_selection_iter_is_selected (selection, &iter) == TRUE)
/* get out of the for() loop */
goto GetOutFor;
row_count++;
valid = gtk_tree_model_iter_next (model, &iter);
}
}
GetOutFor:
[do some processing and return]
--
Marshall Lake -- [EMAIL PROTECTED] -- http://mlake.net
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Re: treeview: seg fault When Collapsing a Row Containg a Selected Item
On Sat, 2007-06-16 at 12:15 -0400, Marshall Lake wrote: > I have a treeview/treestore containing many top-level rows. Each > top-level row contains many children. The treeview works fine except for > one thing. If the user expands a top-level row, selects a child, and then > collapses that row the program seg faults with the console error: > > gtk_tree_store_get_value: assertion `iter->stamp == GTK_TREE_STORE > (tree_model)->stamp' failed > gtype.c:3351: type id `0' is invalid > can't peek value table for type `' which is not currently referenced > Without seeing the code I can only guess. I seems that the iter your using is invalid -- or no longer valid. This could occur if you used a LOCAL variable to create the iter; then saved the pointer of that inter and tried to use it somewhere else which creates the segfault. To poke around looking for it, use this api to test iters before use: bool=gtk_tree_store_iter_is_valid(GtkTreeStore *tree_model, GtkTreeIter *iter) never trust an iter... James, > The treeview works fine if the user never collapses the row and goes on to > make another selection, either in that same top-level or a different > top-level. Also, if a row is expanded and then collapsed with no child > being selected it works fine. > > As an aside (?), I tried gtk_tree_selection_unselect_iter() on the child > after it was selected and got a seg fault and the same error as noted > above at the point the gtk_tree_selection_unselect_iter() was executed. > > Can someone tell me what might need to be done to avoid the seg fault? > ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
treeview: seg fault When Collapsing a Row Containg a Selected Item
I have a treeview/treestore containing many top-level rows. Each top-level row contains many children. The treeview works fine except for one thing. If the user expands a top-level row, selects a child, and then collapses that row the program seg faults with the console error: gtk_tree_store_get_value: assertion `iter->stamp == GTK_TREE_STORE (tree_model)->stamp' failed gtype.c:3351: type id `0' is invalid can't peek value table for type `' which is not currently referenced The treeview works fine if the user never collapses the row and goes on to make another selection, either in that same top-level or a different top-level. Also, if a row is expanded and then collapsed with no child being selected it works fine. As an aside (?), I tried gtk_tree_selection_unselect_iter() on the child after it was selected and got a seg fault and the same error as noted above at the point the gtk_tree_selection_unselect_iter() was executed. Can someone tell me what might need to be done to avoid the seg fault? -- Marshall Lake -- [EMAIL PROTECTED] -- http://mlake.net ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
