On 08/27/2018 01:24 AM, David C. Rankin wrote:
> "How do I use the pointer stored in column 2 of the model to set the
> selection on that treeview entry?"
>
> (the full source of the interface is https://github.com/drankinatty/gtkate
> which is just a concept at the moment, the project will provide the
> functionality of https://github.com/drankinatty/gtkwrite within a
> multi-document/multi-view interface when done)
>
> I have not worked with tree models/stores a great deal and I am a bit
> bewildered by how to get an iter or treepath given the value of column 2 to
> then set the selection on that row/entry in the treeview. I guess I could do a
> for_each and loop over the pointers, but I'm unsure if that is the correct way
> or one of my logical hacks that would be better implemented some other way.
>
Well,
I'm not sure this was the best way to go about it, but from the callback
from the "focus-in-event" signal from the textview, I call the following which
uses the pointer to the textview buffer to compare for equality against the
pointer held in each treemodel instance pointer. This gives me the GtkTreeIter
that I can then use with gtk_tree_selection_select_iter(), e.g.
/** given inst use tree iter to set focus on current view
* (widget is textview associated with window clicked inside)
*/
void tree_get_inst_iter (GtkWidget *widget, gpointer data)
{
mainwin_t *app = data;
GtkTreeModel *model = NULL;
GtkTreeSelection *selection;
GtkTreeIter iter;
gpointer buf = gtk_text_view_get_buffer (GTK_TEXT_VIEW(widget));
gboolean valid, found = FALSE;
/* initialize selection to current */
selection = gtk_tree_view_get_selection (GTK_TREE_VIEW(app->treeview));
/* get treemodel, validate */
model = gtk_tree_view_get_model(GTK_TREE_VIEW(app->treeview));
if (!model) {
g_print ("error: tree_view_get_model - failed.\n");
return;
}
/* get first iter, return in validate */
valid = gtk_tree_model_get_iter_first (model, &iter);
while (valid) { /* loop over each entry in model */
gchar *str = NULL;
kinst_t *inst = NULL;
/* TODO - remove COLNAME & str after debugging done */
gtk_tree_model_get (model, &iter, /* get name & inst */
COLNAME, &str, COLINST, &inst, -1);
/* compare pointer to sourceview with buf from textview (widget) */
if ((gpointer)(inst->buf) == buf) {
gtk_tree_selection_select_iter (selection, &iter);
g_free (str);
found = TRUE;
break;
}
g_free (str);
valid = gtk_tree_model_iter_next (model, &iter);
}
if (!found)
g_warning ("tree_get_inst_iter inst not found.");
if (widget) {}
}
--
David C. Rankin, J.D.,P.E.
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