Le 24/09/2013 10:17, Alessandro Francesconi a écrit :
> Hello, I’m using a GTK+ 2.16 ComboBox and I wondering if there is a
> way to set the visibility of a given element programmatically.
>
> For example, having a ComboBox with 10 elements I want to hide (so
> more than setting it to inactive) the 3rd element, so I need a
> function like
>
> gtk_combo_box_set_visible (mycombo, 2, false)
>
> Does it exist?
Not like this, I'm afraid. The only way I know to do that is to use a
GtkTreeModelFilter to filter out the elements you want to hide, e.g. by
adding a "visible" column to your model and using
gtk_tree_model_filter_set_visible_column() -- or set_visible_func() with
your function handling the logic whether or not to show a row.
Of course GtkCellRenderer has a "visible" property, but it doesn't
remove the row, it only hides the renderer itself.
Hope it helps.
Regards,
Colomban
----
/* Little example */
#include <gtk/gtk.h>
enum {
COL_TEXT,
COL_VISIBLE,
N_COLS
};
int
main (int argc,
char **argv)
{
GtkWidget *window;
GtkWidget *combo;
GtkListStore *store;
GtkTreeModel *filter;
GtkCellRenderer *renderer;
gtk_init (&argc, &argv);
/* data */
store = gtk_list_store_new (N_COLS, G_TYPE_STRING, G_TYPE_BOOLEAN);
gtk_list_store_insert_with_values (store, NULL, -1,
COL_TEXT, "First row",
COL_VISIBLE, TRUE,
-1);
gtk_list_store_insert_with_values (store, NULL, -1,
COL_TEXT, "Second row",
COL_VISIBLE, FALSE,
-1);
gtk_list_store_insert_with_values (store, NULL, -1,
COL_TEXT, "Third row",
COL_VISIBLE, TRUE,
-1);
/* filter */
filter = gtk_tree_model_filter_new (GTK_TREE_MODEL (store), NULL);
gtk_tree_model_filter_set_visible_column (GTK_TREE_MODEL_FILTER (filter),
COL_VISIBLE);
/* combo */
combo = gtk_combo_box_new_with_model (filter);
renderer = gtk_cell_renderer_text_new ();
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (combo), renderer, TRUE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (combo), renderer,
"text", COL_TEXT,
NULL);
/* window */
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);
gtk_container_add (GTK_CONTAINER (window), combo);
gtk_widget_show_all (window);
gtk_main ();
return 0;
}
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