gtk2/demos/gtk-demo/expander.c

/* Expander
 *
 * GtkExpander allows to provide additional content that is initially hidden.
 * This is also known as "disclosure triangle".
 *
 */

#include <gtk/gtk.h>

static GtkWidget *window = NULL;


GtkWidget *
do_expander (GtkWidget *do_widget)
{
  GtkWidget *content_area;
  GtkWidget *vbox;
  GtkWidget *label;
  GtkWidget *expander;

  if (!window)
  {
    window = gtk_dialog_new_with_buttons ("GtkExpander",
                                          GTK_WINDOW (do_widget),
                                          0,
                                          GTK_STOCK_CLOSE,
                                          GTK_RESPONSE_NONE,
                                          NULL);
    gtk_window_set_resizable (GTK_WINDOW (window), FALSE);

    g_signal_connect (window, "response",
                      G_CALLBACK (gtk_widget_destroy), NULL);
    g_signal_connect (window, "destroy",
                      G_CALLBACK (gtk_widget_destroyed), &window);

    content_area = gtk_dialog_get_content_area (GTK_DIALOG (window));

    vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
    gtk_box_pack_start (GTK_BOX (content_area), vbox, TRUE, TRUE, 0);
    gtk_container_set_border_width (GTK_CONTAINER (vbox), 5);

    label = gtk_label_new ("Expander demo. Click on the triangle for details.");
    gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);

    /* Create the expander */
    expander = gtk_expander_new ("Details");
    gtk_box_pack_start (GTK_BOX (vbox), expander, FALSE, FALSE, 0);

    label = gtk_label_new ("Details can be shown or hidden.");
    gtk_container_add (GTK_CONTAINER (expander), label);
  }

  if (!gtk_widget_get_visible (window))
    gtk_widget_show_all (window);
  else
    gtk_widget_destroy (window);

  return window;
}