GTK+ Forums

alen121 · Familiar Face Joined: 28 Sep 2007 Posts: 30

Hi . I want to add 2 items to my combobox but there is no display . what is the problem ?

Code: (Plaintext)

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#include <gtk/gtk.h>

int main(int argc, char *argv[]) {
GtkWidget *window , *combo;
gtk_init(&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
combo=gtk_combo_box_new();
GtkListStore *mylist ;
GtkTreeIter iter ;
mylist=gtk_list_store_new(1,G_TYPE_STRING);
gtk_list_store_append(mylist, &iter);
gtk_list_store_set (mylist, &iter,0,"Residental", -1);
gtk_list_store_append(mylist, &iter);
gtk_list_store_set (mylist, &iter,0,"Commerical", -1);
gtk_combo_box_set_model(GTK_COMBO_BOX(combo),GTK_TREE_MODEL(mylist));
gtk_container_add (GTK_CONTAINER (window),combo);
gtk_widget_show_all(window);
gtk_main();
return 0 ;
}

Micah Carrick · Posted: Tue Feb 12, 2008 5:53 pm Post subject:

If all you're looking to do is add text to the combo box, perhaps it would be simpler to use gtk_combo_box_new_text () and gtk_combo_box_append_text () functions instead of your own model.

Code: (C)

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#include <gtk/gtk.h>

int main(int argc, char *argv[]) {

GtkWidget *window , *combo;

gtk_init(&argc, &argv);

window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
combo=gtk_combo_box_new_text();

gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "Residental");
gtk_combo_box_append_text (GTK_COMBO_BOX (combo), "Commerical");
gtk_container_add (GTK_CONTAINER (window),combo);
gtk_widget_show_all(window);

g_signal_connect (G_OBJECT(window), "destroy",
G_CALLBACK (gtk_main_quit), NULL);

gtk_main();
return 0 ;
}

Lino · Familiar Face Joined: 27 Dec 2007 Posts: 20

Can I create a GtkComboBox with a custom GtkTreeModel? Yes, but how I add columns and cell-renderer?

tadeboro · Familiar Face Joined: 23 Jul 2008 Posts: 7

Helo

In order to pack more than one element into the combo box, you need to use cell layout interface.

Below is a simple example with 2 elements embedded in combo box.

Code: (C)

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GtkWidget *combo;
GtkCellRenderer *renderer;
GtkListStore *model;
GtkTreeIter iter;

/* Create model for combo */
model = gtk_list_store_new( 2, G_TYPE_BOOLEAN,
G_TYPE_STRING );
gtk_list_store_append( model, &iter );
gtk_list_store_set( model, &iter,
0, FALSE,
1, "Pathological function",
-1 );

gtk_list_store_append( model, &iter );
gtk_list_store_set( model, &iter,
0, FALSE,
1, "Physiological function",
-1 );

/* create combo box */
combo = gtk_combo_box_new_with_model(
GTK_TREE_MODEL( model ) );
/* place combo somewhere */

/* create columns */
renderer = gtk_cell_renderer_toggle_new();
gtk_cell_layout_pack_start( GTK_CELL_LAYOUT( combo ),
renderer, FALSE );
gtk_cell_layout( GTK_CELL_LAYOUT( combo ), renderer,
"active", 0,
NULL );

renderer = gtk_cell_renderer_text_new();
gtk_cell_layout_pack_start( GTK_CELL_LAYOUT( combo ),
renderer, TRUE );
gtk_cell_layout( GTK_CELL_LAYOUT( combo ), renderer,
"text", 1,
NULL );

Hope it helps.

Tadej