gtk/demos/gtk-demo/fishbowl.c

/* Benchmark/Fishbowl
 *
 * This demo models the fishbowl demos seen on the web in a GTK way.
 * It's also a neat little tool to see how fast your computer (or
 * your GTK version) is.
 */

#include <gtk/gtk.h>

#include "gtkfishbowl.h"

char **icon_names = NULL;
gsize n_icon_names = 0;

static void
init_icon_names (GtkIconTheme *theme)
{
  GPtrArray *icons;
  GList *l, *icon_list;

  if (icon_names)
    return;

  icon_list = gtk_icon_theme_list_icons (theme, NULL);
  icons = g_ptr_array_new ();

  for (l = icon_list; l; l = l->next)
    {
      if (g_str_has_suffix (l->data, "symbolic"))
        continue;

      g_ptr_array_add (icons, g_strdup (l->data));
    }

  n_icon_names = icons->len;
  g_ptr_array_add (icons, NULL); /* NULL-terminate the array */
  icon_names = (char **) g_ptr_array_free (icons, FALSE);

  /* don't free strings, we assigned them to the array */
  g_list_free_full (icon_list, g_free);
}

static const char *
get_random_icon_name (GtkIconTheme *theme)
{
  init_icon_names (theme);

  return icon_names[g_random_int_range(0, n_icon_names)];
}

GtkWidget *
create_icon (void)
{
  GtkWidget *image;

  image = gtk_image_new_from_icon_name (get_random_icon_name (gtk_icon_theme_get_default ()));
  gtk_image_set_icon_size (GTK_IMAGE (image), GTK_ICON_SIZE_LARGE);

  return image;
}

GtkWidget *
do_fishbowl (GtkWidget *do_widget)
{
  static GtkWidget *window = NULL;

  if (!window)
    {
      GtkBuilder *builder;
      GtkWidget *bowl;

      g_type_ensure (GTK_TYPE_FISHBOWL);

      builder = gtk_builder_new_from_resource ("/fishbowl/fishbowl.ui");
      gtk_builder_connect_signals (builder, NULL);
      window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
      bowl = GTK_WIDGET (gtk_builder_get_object (builder, "bowl"));
      gtk_fishbowl_set_creation_func (GTK_FISHBOWL (bowl), create_icon);
      gtk_window_set_display (GTK_WINDOW (window),
                              gtk_widget_get_display (do_widget));
      g_signal_connect (window, "destroy",
                        G_CALLBACK (gtk_widget_destroyed), &window);

      gtk_widget_realize (window);
    }

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


  return window;
}