gtk/tests/testlistview-animating.c

#include <gtk/gtk.h>

#ifdef SMALL
#define AVERAGE 15
#define VARIANCE 10
#else
#define AVERAGE 300
#define VARIANCE 200
#endif

static void
update_label (GtkListItem *list_item,
              GParamSpec  *pspec,
              GtkLabel    *label)
{
  gpointer item;
  char *s;

  item = gtk_list_item_get_item (list_item);

  if (item)
    s = g_strdup_printf ("%u: %s",
                         gtk_list_item_get_position (list_item),
                         (const char *) g_object_get_data (item, "message"));
  else
    s = NULL;

  gtk_label_set_text (label, s);

  g_free (s);
}

static void
setup_list_item (GtkListItem *list_item,
                 gpointer     unused)
{
  GtkWidget *label = gtk_label_new ("");

  g_signal_connect (list_item, "notify", G_CALLBACK (update_label), label);
  gtk_container_add (GTK_CONTAINER (list_item), label);
}

static GtkWidget *
create_widget_for_listbox (gpointer item,
                           gpointer unused)
{
  const char *message = g_object_get_data (item, "message");
  GtkWidget *widget;
  
  widget = gtk_label_new (message);

  return widget;
}

static gboolean reverse_sort;

static int
compare (gconstpointer first,
         gconstpointer second,
         gpointer      unused)
{
  int diff = (GPOINTER_TO_UINT (g_object_get_data ((gpointer) first, "counter")) % 1000)
             - (GPOINTER_TO_UINT (g_object_get_data ((gpointer) second, "counter")) % 1000);

  if (reverse_sort)
    return -diff;
  else
    return diff;
}

static void
add (GListStore *store)
{
  static guint counter;
  GObject *o;
  char *message;
  guint pos;
    
  counter++;
  o = g_object_new (G_TYPE_OBJECT, NULL);
  g_object_set_data (o, "counter", GUINT_TO_POINTER (counter));
  message = g_strdup_printf ("Item %u", counter);
  g_object_set_data_full (o, "message", message, g_free);

  pos = g_random_int_range (0, g_list_model_get_n_items (G_LIST_MODEL (store)) + 1);
  g_list_store_insert (store, pos, o);
  g_object_unref (o);
}

static void
delete (GListStore *store)
{
  guint pos;
  
  pos = g_random_int_range (0, g_list_model_get_n_items (G_LIST_MODEL (store)));
  g_list_store_remove (store, pos);
}

static gboolean
do_stuff (gpointer store)
{
  if (g_random_int_range (AVERAGE - VARIANCE, AVERAGE + VARIANCE) < g_list_model_get_n_items (store))
    delete (store);
  else
    add (store);

  return G_SOURCE_CONTINUE;
}

static gboolean
revert_sort (gpointer sort)
{
  reverse_sort = !reverse_sort;

  gtk_sort_list_model_resort (sort);

  return G_SOURCE_CONTINUE;
}

int
main (int argc, char *argv[])
{
  GtkWidget *win, *hbox, *vbox, *sw, *listview, *listbox, *label;
  GListStore *store;
  GtkSortListModel *sort;
  guint i;

  gtk_init ();

  store = g_list_store_new (G_TYPE_OBJECT);
  for (i = 0; i < AVERAGE; i++)
    add (store);
  sort = gtk_sort_list_model_new (G_LIST_MODEL (store),
                                  compare,
                                  NULL, NULL);

  win = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_default_size (GTK_WINDOW (win), 400, 600);
  g_signal_connect (win, "destroy", G_CALLBACK (gtk_main_quit), win);

  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
  gtk_container_add (GTK_CONTAINER (win), hbox);

  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
  gtk_container_add (GTK_CONTAINER (hbox), vbox);

  label = gtk_label_new ("GtkListView");
  gtk_container_add (GTK_CONTAINER (vbox), label);

  sw = gtk_scrolled_window_new (NULL, NULL);
  gtk_widget_set_hexpand (sw, TRUE);
  gtk_widget_set_vexpand (sw, TRUE);
  gtk_container_add (GTK_CONTAINER (vbox), sw);

  listview = gtk_list_view_new ();
  gtk_list_view_set_functions (GTK_LIST_VIEW (listview),
                               setup_list_item,
                               NULL,
                               NULL, NULL);
  gtk_container_add (GTK_CONTAINER (sw), listview);

  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 4);
  gtk_container_add (GTK_CONTAINER (hbox), vbox);

  label = gtk_label_new ("GtkListBox");
  gtk_container_add (GTK_CONTAINER (vbox), label);

  sw = gtk_scrolled_window_new (NULL, NULL);
  gtk_widget_set_hexpand (sw, TRUE);
  gtk_widget_set_vexpand (sw, TRUE);
  gtk_container_add (GTK_CONTAINER (vbox), sw);

  listbox = gtk_list_box_new ();
  gtk_container_add (GTK_CONTAINER (sw), listbox);

  gtk_list_view_set_model (GTK_LIST_VIEW (listview), G_LIST_MODEL (sort));
  gtk_list_box_bind_model (GTK_LIST_BOX (listbox),
                           G_LIST_MODEL (sort),
                           create_widget_for_listbox,
                           NULL, NULL);

  g_timeout_add (100, do_stuff, store);
  g_timeout_add_seconds (3, revert_sort, sort);

  gtk_widget_show (win);

  gtk_main ();

  g_object_unref (store);

  return 0;
}