/* -*- Mode: C; c-file-style: "gnu"; tab-width: 8 -*- */
#include <gtk/gtk.h>

static GtkWidget*
get_test_page (const gchar *text)
{
  return gtk_label_new (text);
}

static void
cancel_callback (GtkWidget *widget)
{
  g_print ("cancel\n");

  gtk_widget_hide (widget);
}

static void
close_callback (GtkWidget *widget)
{
  g_print ("close\n");

  gtk_widget_hide (widget);
}

static void
apply_callback (GtkWidget *widget)
{
  g_print ("apply\n");
}

static gboolean
progress_timeout (GtkWidget *assistant)
{
  GtkWidget *page, *progress;
  gint current_page;
  gdouble value;

  current_page = gtk_assistant_get_current_page (GTK_ASSISTANT (assistant));
  page = gtk_assistant_get_nth_page (GTK_ASSISTANT (assistant), current_page);
  progress = GTK_BIN (page)->child;

  value  = gtk_progress_bar_get_fraction (GTK_PROGRESS_BAR (progress));
  value += 0.1;
  gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (progress), value);

  if (value >= 1.0)
    {
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);
      return FALSE;
    }

  return TRUE;
}

static void
prepare_callback (GtkWidget *widget, GtkWidget *page)
{
  if (GTK_IS_LABEL (page))
    g_print ("prepare: %s\n", gtk_label_get_text (GTK_LABEL (page)));
  else if (gtk_assistant_get_page_type (GTK_ASSISTANT (widget), page) == GTK_ASSISTANT_PAGE_PROGRESS)
    {
      GtkWidget *progress;

      progress = GTK_BIN (page)->child;
      gtk_assistant_set_page_complete (GTK_ASSISTANT (widget), page, FALSE);
      gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (progress), 0.0);
      g_timeout_add (300, (GSourceFunc) progress_timeout, widget);
    }
  else
    g_print ("prepare: %d\n", gtk_assistant_get_current_page (GTK_ASSISTANT (widget)));
}

static void
create_simple_assistant (GtkWidget *widget)
{
  static GtkWidget *assistant = NULL;

  if (!assistant)
    {
      GtkWidget *page;

      assistant = gtk_assistant_new ();
      gtk_window_set_default_size (GTK_WINDOW (assistant), 400, 300);

      g_signal_connect (G_OBJECT (assistant), "cancel",
			G_CALLBACK (cancel_callback), NULL);
      g_signal_connect (G_OBJECT (assistant), "close",
			G_CALLBACK (close_callback), NULL);
      g_signal_connect (G_OBJECT (assistant), "apply",
			G_CALLBACK (apply_callback), NULL);
      g_signal_connect (G_OBJECT (assistant), "prepare",
			G_CALLBACK (prepare_callback), NULL);

      page = get_test_page ("Page 1");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Page 1");
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);

      page = get_test_page ("Page 2");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Page 2");
      gtk_assistant_set_page_type  (GTK_ASSISTANT (assistant), page, GTK_ASSISTANT_PAGE_CONFIRM);
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);
    }

  if (!GTK_WIDGET_VISIBLE (assistant))
    gtk_widget_show (assistant);
  else
    {
      gtk_widget_destroy (assistant);
      assistant = NULL;
    }
}

static void
create_generous_assistant (GtkWidget *widget)
{
  static GtkWidget *assistant = NULL;

  if (!assistant)
    {
      GtkWidget *page;

      assistant = gtk_assistant_new ();
      gtk_window_set_default_size (GTK_WINDOW (assistant), 400, 300);

      g_signal_connect (G_OBJECT (assistant), "cancel",
			G_CALLBACK (cancel_callback), NULL);
      g_signal_connect (G_OBJECT (assistant), "close",
			G_CALLBACK (close_callback), NULL);
      g_signal_connect (G_OBJECT (assistant), "apply",
			G_CALLBACK (apply_callback), NULL);
      g_signal_connect (G_OBJECT (assistant), "prepare",
			G_CALLBACK (prepare_callback), NULL);

      page = get_test_page ("Introduction");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Introduction");
      gtk_assistant_set_page_type  (GTK_ASSISTANT (assistant), page, GTK_ASSISTANT_PAGE_INTRO);
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);

      page = get_test_page ("Content");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Content");
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);

      page = get_test_page ("More content");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "More content");
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);
      
      page = get_test_page ("Confirmation");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Confirmation");
      gtk_assistant_set_page_type  (GTK_ASSISTANT (assistant), page, GTK_ASSISTANT_PAGE_CONFIRM);
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);

      page = gtk_alignment_new (0.5, 0.5, 0.9, 0.0);
      gtk_container_add (GTK_CONTAINER (page), gtk_progress_bar_new ());
      gtk_widget_show_all (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Progress");
      gtk_assistant_set_page_type  (GTK_ASSISTANT (assistant), page, GTK_ASSISTANT_PAGE_PROGRESS);

      page = get_test_page ("Summary");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Summary");
      gtk_assistant_set_page_type  (GTK_ASSISTANT (assistant), page, GTK_ASSISTANT_PAGE_SUMMARY);
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);
    }

  if (!GTK_WIDGET_VISIBLE (assistant))
    gtk_widget_show (assistant);
  else
    {
      gtk_widget_destroy (assistant);
      assistant = NULL;
    }
}

static gchar selected_branch = 'A';

static void
select_branch (GtkWidget *widget, gchar branch)
{
  selected_branch = branch;
}

static gint
nonlinear_assistant_forward_page (gint current_page, gpointer data)
{
  switch (current_page)
    {
    case 0:
      if (selected_branch == 'A')
	return 1;
      else
	return 2;
    case 1:
    case 2:
      return 3;
    default:
      return -1;
    }
}

static void
create_nonlinear_assistant (GtkWidget *widget)
{
  static GtkWidget *assistant = NULL;

  if (!assistant)
    {
      GtkWidget *page, *button;

      assistant = gtk_assistant_new ();
      gtk_window_set_default_size (GTK_WINDOW (assistant), 400, 300);

      g_signal_connect (G_OBJECT (assistant), "cancel",
			G_CALLBACK (cancel_callback), NULL);
      g_signal_connect (G_OBJECT (assistant), "close",
			G_CALLBACK (close_callback), NULL);
      g_signal_connect (G_OBJECT (assistant), "apply",
			G_CALLBACK (apply_callback), NULL);
      g_signal_connect (G_OBJECT (assistant), "prepare",
			G_CALLBACK (prepare_callback), NULL);

      gtk_assistant_set_forward_page_func (GTK_ASSISTANT (assistant),
					   nonlinear_assistant_forward_page,
					   NULL, NULL);

      page = gtk_vbox_new (FALSE, 6);

      button = gtk_radio_button_new_with_label (NULL, "branch A");
      gtk_box_pack_start (GTK_BOX (page), button, FALSE, FALSE, 0);
      g_signal_connect (G_OBJECT (button), "toggled", G_CALLBACK (select_branch), GINT_TO_POINTER ('A'));
      gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
      
      button = gtk_radio_button_new_with_label (gtk_radio_button_get_group (GTK_RADIO_BUTTON (button)),
						"branch B");
      gtk_box_pack_start (GTK_BOX (page), button, FALSE, FALSE, 0);
      g_signal_connect (G_OBJECT (button), "toggled", G_CALLBACK (select_branch), GINT_TO_POINTER ('B'));

      gtk_widget_show_all (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Page 1");
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);
      
      page = get_test_page ("Page 2A");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Page 2A");
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);

      page = get_test_page ("Page 2B");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Page 2B");
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);

      page = get_test_page ("Confirmation");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Confirmation");
      gtk_assistant_set_page_type  (GTK_ASSISTANT (assistant), page, GTK_ASSISTANT_PAGE_CONFIRM);
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);
    }

  if (!GTK_WIDGET_VISIBLE (assistant))
    gtk_widget_show (assistant);
  else
    {
      gtk_widget_destroy (assistant);
      assistant = NULL;
    }
}

static gint
looping_assistant_forward_page (gint current_page, gpointer data)
{
  switch (current_page)
    {
    case 0:
      return 1;
    case 1:
      return 2;
    case 2:
      return 3;
    case 3:
      {
	GtkAssistant *assistant;
	GtkWidget *page;

	assistant = (GtkAssistant*) data;
	page = gtk_assistant_get_nth_page (assistant, current_page);

	if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (page)))
	  return 0;
	else
	  return 4;
      }
    case 4:
    default:
      return -1;
    }
}

static void
create_looping_assistant (GtkWidget *widget)
{
  static GtkWidget *assistant = NULL;

  if (!assistant)
    {
      GtkWidget *page;

      assistant = gtk_assistant_new ();
      gtk_window_set_default_size (GTK_WINDOW (assistant), 400, 300);

      g_signal_connect (G_OBJECT (assistant), "cancel",
			G_CALLBACK (cancel_callback), NULL);
      g_signal_connect (G_OBJECT (assistant), "close",
			G_CALLBACK (close_callback), NULL);
      g_signal_connect (G_OBJECT (assistant), "apply",
			G_CALLBACK (apply_callback), NULL);
      g_signal_connect (G_OBJECT (assistant), "prepare",
			G_CALLBACK (prepare_callback), NULL);

      gtk_assistant_set_forward_page_func (GTK_ASSISTANT (assistant),
					   looping_assistant_forward_page,
					   assistant, NULL);

      page = get_test_page ("Introduction");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Introduction");
      gtk_assistant_set_page_type  (GTK_ASSISTANT (assistant), page, GTK_ASSISTANT_PAGE_INTRO);
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);

      page = get_test_page ("Content");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Content");
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);

      page = get_test_page ("More content");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "More content");
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);

      page = gtk_check_button_new_with_label ("Loop?");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Loop?");
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);
      
      page = get_test_page ("Confirmation");
      gtk_widget_show (page);
      gtk_assistant_append_page (GTK_ASSISTANT (assistant), page);
      gtk_assistant_set_page_title (GTK_ASSISTANT (assistant), page, "Confirmation");
      gtk_assistant_set_page_type  (GTK_ASSISTANT (assistant), page, GTK_ASSISTANT_PAGE_CONFIRM);
      gtk_assistant_set_page_complete (GTK_ASSISTANT (assistant), page, TRUE);
    }

  if (!GTK_WIDGET_VISIBLE (assistant))
    gtk_widget_show (assistant);
  else
    {
      gtk_widget_destroy (assistant);
      assistant = NULL;
    }
}

struct {
  gchar *text;
  void  (*func) (GtkWidget *widget);
} buttons[] =
  {
    { "simple assistant",    create_simple_assistant },
    { "generous assistant",  create_generous_assistant },
    { "nonlinear assistant", create_nonlinear_assistant },
    { "looping assistant",   create_looping_assistant },
  };

int
main (int argc, gchar *argv[])
{
  GtkWidget *window, *box, *button;
  gint i;

  gtk_init (&argc, &argv);

  if (g_getenv ("RTL"))
    gtk_widget_set_default_direction (GTK_TEXT_DIR_RTL);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

  g_signal_connect (G_OBJECT (window), "destroy",
		    G_CALLBACK (gtk_main_quit), NULL);
  g_signal_connect (G_OBJECT (window), "delete-event",
		    G_CALLBACK (gtk_false), NULL);

  box = gtk_vbox_new (FALSE, 6);
  gtk_container_add (GTK_CONTAINER (window), box);

  for (i = 0; i < G_N_ELEMENTS (buttons); i++)
    {
      button = gtk_button_new_with_label (buttons[i].text);

      if (buttons[i].func)
	g_signal_connect (G_OBJECT (button), "clicked",
			  G_CALLBACK (buttons[i].func), NULL);

      gtk_box_pack_start (GTK_BOX (box), button, TRUE, TRUE, 0);
    }

  gtk_widget_show_all (window);
  gtk_main ();

  return 0;
}
