Re: Problem with GtkTreeModel, simultaneous iterating and append

[edscott wilson garcia <edscott prodigy net mx>]

On Mon, 2003-10-20 at 08:49, Boszormenyi Zoltan wrote:
> Hi,
> 
> is it possible to append a row to a TreeModel while having
> an iterator going through the same model?

Probably a hack but... if you append the row to a treepath greater than
that of the iterator, no problem. But if you append it to a path less
than that represented by the iterator, the iterator will be knocked off
track. That's just what I've observed.

Edscott

> 
> I have a code snippet that does just the same,
> the second time the code runs
> the second gtk_tree_model_get_iter_first() seems to succeed
> but gives an invalid iterator, as I get invalid values.
> 
> I use an uptodate fedora core, gtk2-2.2.4-5.1.
> 
> This is the code:
> 
> void utolso_sztorno(void) {
> 	GtkTreeIter	iter, iter1;
> 	int		sorsz, sorsz1, lancfej, lancresz, gyujto, afa,
> 			prev, next;
> 	gchar		*tranz, *vk, *nev, *afajel, *egys;
> 	double		szorzo, ar, osszeg;
> 
> 	if (gtk_tree_model_get_iter_first(GTK_TREE_MODEL(ptgdb_internal->tetelek), &iter)) {
> 		do {
> 			gtk_tree_model_get (GTK_TREE_MODEL(ptgdb_internal->tetelek), &iter,
> 				TETEL_SORSZ, &sorsz, TETEL_PREV, &lancresz, -1);
> 			if (!lancresz)
> 				lancfej = sorsz;
> 		} while (gtk_tree_model_iter_next (GTK_TREE_MODEL(ptgdb_internal->tetelek), &iter));
> #if 0 /* makes no difference */
> 		memset(&iter, 0, sizeof(iter));
> #endif
> 		if (gtk_tree_model_get_iter_first(GTK_TREE_MODEL(ptgdb_internal->tetelek), &iter))
> 		do {
> 			gtk_tree_model_get (GTK_TREE_MODEL(ptgdb_internal->tetelek), &iter,
> 				TETEL_SORSZ, &sorsz1, TETEL_TRANZAK, &tranz,
> 				TETEL_VKOD, &vk, TETEL_NEV, &nev,
> 				TETEL_GYUJTO, &gyujto, TETEL_AFA, &afa,
> 				TETEL_AFAJEL, &afajel, TETEL_SZORZO, &szorzo,
> 				TETEL_EGYSEG, &egys, TETEL_AR, &ar,
> 				TETEL_OSSZEG, &osszeg, TETEL_PREV, &prev,
> 				TETEL_NEXT, &next, -1);
> /* here I get invalid numbers on the second run, seems to be un-initialized */
> printf("sorsz: %d\n", sorsz1);
> 			if (sorsz1 > sorsz)
> 				break;
> 			if ((sorsz1 >= lancfej) && (sorsz1 <= sorsz)) {
> 				gtk_list_store_set (ptgdb_internal->tetelek,
> 					&iter1, TETEL_SZTORNO, TRUE,
> 					osszeg, -1);
> 				gtk_list_store_append (ptgdb_internal->tetelek, &iter1);
> 				gtk_list_store_set(ptgdb_internal->tetelek, &iter1,
> 					TETEL_SORSZ, sorsz1 + sorsz - lancfej + 1,
> 					TETEL_TRANZAK, tranz,
> 					TETEL_VKOD, vk, TETEL_NEV, nev,
> 					TETEL_SZTORNO, TRUE, TETEL_IGAZITAS, 1.0,
> 					TETEL_GYUJTO, gyujto,
> 					TETEL_AFA, afa, TETEL_AFAJEL, afajel,
> 					TETEL_SZORZO, -szorzo,
> 					TETEL_EGYSEG, egys,
> 					TETEL_AR, ar, TETEL_OSSZEG, -osszeg,
> 					TETEL_PREV, prev, TETEL_NEXT, next,
> 					-1);
> 			}
> 		} while (gtk_tree_model_iter_next (GTK_TREE_MODEL(ptgdb_internal->tetelek), &iter1));
> 	} else
> 		gdk_beep();
> }
>