gtk2/demos/gtk-demo/entry_completion.c

/* Entry/Completion
 *
 * GtkEntryCompletion provides a mechanism for adding support for
 * completion in GtkEntry.
 *
 */

#include <glib/gi18n.h>
#include <gtk/gtk.h>

/* Creates a tree model containing the completions */
static GtkTreeModel *
create_completion_model (void)
{
  GtkListStore *store;
  GtkTreeIter iter;

  store = gtk_list_store_new (1, G_TYPE_STRING);

  /* Append one word */
  gtk_list_store_append (store, &iter);
  gtk_list_store_set (store, &iter, 0, "GNOME", -1);

  /* Append another word */
  gtk_list_store_append (store, &iter);
  gtk_list_store_set (store, &iter, 0, "total", -1);

  /* And another word */
  gtk_list_store_append (store, &iter);
  gtk_list_store_set (store, &iter, 0, "totally", -1);

  return GTK_TREE_MODEL (store);
}


GtkWidget *
do_entry_completion (GtkWidget *do_widget)
{
  static GtkWidget *window = NULL;
  GtkWidget *vbox;
  GtkWidget *label;
  GtkWidget *entry;
  GtkEntryCompletion *completion;
  GtkTreeModel *completion_model;

  if (!window)
    {
      window = gtk_window_new ();
      gtk_window_set_display (GTK_WINDOW (window),
                              gtk_widget_get_display (do_widget));
      gtk_window_set_title (GTK_WINDOW (window), "Completion");
      gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);

      vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
      gtk_widget_set_margin_start (vbox, 5);
      gtk_widget_set_margin_end (vbox, 5);
      gtk_widget_set_margin_top (vbox, 5);
      gtk_widget_set_margin_bottom (vbox, 5);
      gtk_window_set_child (GTK_WINDOW (window), vbox);

      label = gtk_label_new (NULL);
      gtk_label_set_markup (GTK_LABEL (label), "Try writing <b>total</b> or <b>gnome</b> for example.");
      gtk_box_append (GTK_BOX (vbox), label);

      /* Create our entry */
      entry = gtk_entry_new ();
      gtk_box_append (GTK_BOX (vbox), entry);

      /* Create the completion object */
      completion = gtk_entry_completion_new ();

      /* Assign the completion to the entry */
      gtk_entry_set_completion (GTK_ENTRY (entry), completion);
      g_object_unref (completion);

      /* Create a tree model and use it as the completion model */
      completion_model = create_completion_model ();
      gtk_entry_completion_set_model (completion, completion_model);
      g_object_unref (completion_model);

      /* Use model column 0 as the text column */
      gtk_entry_completion_set_text_column (completion, 0);
    }

  if (!gtk_widget_get_visible (window))
    gtk_widget_show (window);
  else
    gtk_window_destroy (GTK_WINDOW (window));

  return window;
}