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)
{
  const char *strings[] = {
    "GNOME",
    "gnominious",
    "Gnomonic projection",
    "Gnosophy",
    "total",
    "totally",
    "toto",
    "tottery",
    "totterer",
    "Totten trust",
    "Tottenham hotspurs",
    "totipotent",
    "totipotency",
    "totemism",
    "totem pole",
    "Totara",
    "totalizer",
    "totalizator",
    "totalitarianism",
    "total parenteral nutrition",
    "total eclipse",
    "Totipresence",
    "Totipalmi",
    "zombie",
    "aæx",
    "aæy",
    "aæz",
    NULL
  };
  int i;
  GtkListStore *store;
  GtkTreeIter iter;

  store = gtk_list_store_new (1, G_TYPE_STRING);

  for (i = 0; strings[i]; i++)
    {
      /* Append one word */
      gtk_list_store_append (store, &iter);
      gtk_list_store_set (store, &iter, 0, strings[i], -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);

      gtk_entry_completion_set_inline_completion (completion, TRUE);
      gtk_entry_completion_set_inline_selection (completion, TRUE);
    }

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

  return window;
}