testgtk.c

开发linux应用-用gtk+和gdk开发linux图形用户界面应用－－的实例

statusbar_steal (GtkWidget *button,
	         GtkStatusbar *statusbar)
{
  gtk_statusbar_remove (statusbar, 1, 4);
}

static void
statusbar_popped (GtkStatusbar  *statusbar,
		  guint          context_id,
		  const gchar	*text)
{
  if (!statusbar->messages)
    statusbar_counter = 1;
}

static void
statusbar_contexts (GtkStatusbar *statusbar)
{
  gchar *string;

  string = "any context";
  g_print ("GtkStatusBar: context=\"%s\", context_id=%d\n",
	   string,
	   gtk_statusbar_get_context_id (statusbar, string));
  
  string = "idle messages";
  g_print ("GtkStatusBar: context=\"%s\", context_id=%d\n",
	   string,
	   gtk_statusbar_get_context_id (statusbar, string));
  
  string = "some text";
  g_print ("GtkStatusBar: context=\"%s\", context_id=%d\n",
	   string,
	   gtk_statusbar_get_context_id (statusbar, string));

  string = "hit the mouse";
  g_print ("GtkStatusBar: context=\"%s\", context_id=%d\n",
	   string,
	   gtk_statusbar_get_context_id (statusbar, string));

  string = "hit the mouse2";
  g_print ("GtkStatusBar: context=\"%s\", context_id=%d\n",
	   string,
	   gtk_statusbar_get_context_id (statusbar, string));
}

static void
statusbar_dump_stack (GtkStatusbar *statusbar)
{
  GSList *list;

  for (list = statusbar->messages; list; list = list->next)
    {
      GtkStatusbarMsg *msg;

      msg = list->data;
      g_print ("context_id: %d, message_id: %d, status_text: \"%s\"\n",
               msg->context_id,
               msg->message_id,
               msg->text);
    }
}

static void
create_statusbar (void)
{
  static GtkWidget *window = NULL;
  GtkWidget *box1;
  GtkWidget *box2;
  GtkWidget *button;
  GtkWidget *separator;
  GtkWidget *statusbar;

  if (!window)
    {
      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

      gtk_signal_connect (GTK_OBJECT (window), "destroy",
			  GTK_SIGNAL_FUNC (gtk_widget_destroyed),
			  &window);

      gtk_window_set_title (GTK_WINDOW (window), "statusbar");
      gtk_container_border_width (GTK_CONTAINER (window), 0);

      box1 = gtk_vbox_new (FALSE, 0);
      gtk_container_add (GTK_CONTAINER (window), box1);

      box2 = gtk_vbox_new (FALSE, 10);
      gtk_container_border_width (GTK_CONTAINER (box2), 10);
      gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);

      statusbar = gtk_statusbar_new ();
      gtk_box_pack_end (GTK_BOX (box1), statusbar, TRUE, TRUE, 0);
      gtk_signal_connect (GTK_OBJECT (statusbar),
			  "text_popped",
			  GTK_SIGNAL_FUNC (statusbar_popped),
			  NULL);

      button = gtk_widget_new (gtk_button_get_type (),
			       "label", "push something",
			       "visible", TRUE,
			       "parent", box2,
			       "signal::clicked", statusbar_push, statusbar,
			       NULL);

      button = gtk_widget_new (gtk_button_get_type (),
			       "label", "pop",
			       "visible", TRUE,
			       "parent", box2,
			       "signal_after::clicked", statusbar_pop, statusbar,
			       NULL);

      button = gtk_widget_new (gtk_button_get_type (),
			       "label", "steal #4",
			       "visible", TRUE,
			       "parent", box2,
			       "signal_after::clicked", statusbar_steal, statusbar,
			       NULL);

      button = gtk_widget_new (gtk_button_get_type (),
			       "label", "dump stack",
			       "visible", TRUE,
			       "parent", box2,
			       "object_signal::clicked", statusbar_dump_stack, statusbar,
			       NULL);

      button = gtk_widget_new (gtk_button_get_type (),
			       "label", "test contexts",
			       "visible", TRUE,
			       "parent", box2,
			       "object_signal_after::clicked", statusbar_contexts, statusbar,
			       NULL);

      separator = gtk_hseparator_new ();
      gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);

      box2 = gtk_vbox_new (FALSE, 10);
      gtk_container_border_width (GTK_CONTAINER (box2), 10);
      gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);

      button = gtk_button_new_with_label ("close");
      gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
				 GTK_SIGNAL_FUNC(gtk_widget_destroy),
				 GTK_OBJECT (window));
      gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
      GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
      gtk_widget_grab_default (button);
    }

  if (!GTK_WIDGET_VISIBLE (window))
    gtk_widget_show_all (window);
  else
    gtk_widget_destroy (window);
}

/*
 * GtkTree
 */

static void
cb_tree_destroy_event(GtkWidget* w)
{
  sTreeButtons* tree_buttons;

  /* free buttons structure associate at this tree */
  tree_buttons = gtk_object_get_user_data (GTK_OBJECT (w));
  g_free (tree_buttons);
}

static void
cb_add_new_item(GtkWidget* w, GtkTree* tree)
{
  sTreeButtons* tree_buttons;
  GList* selected_list;
  GtkWidget* selected_item;
  GtkWidget* subtree;
  GtkWidget* item_new;
  char buffer[255];

  tree_buttons = gtk_object_get_user_data(GTK_OBJECT(tree));

  selected_list = GTK_TREE_SELECTION(tree);

  if(selected_list == NULL)
    {
      /* there is no item in tree */
      subtree = GTK_WIDGET(tree);
    }
  else
    {
      /* list can have only one element */
      selected_item = GTK_WIDGET(selected_list->data);
      
      subtree = GTK_TREE_ITEM_SUBTREE(selected_item);

      if(subtree == NULL)
	{
	  /* current selected item have not subtree ... create it */
	  subtree = gtk_tree_new();
	  gtk_tree_item_set_subtree(GTK_TREE_ITEM(selected_item), 
				    subtree);
	}
    }

  /* at this point, we know which subtree will be used to add new item */
  /* create a new item */
  sprintf(buffer, "item add %d", tree_buttons->nb_item_add);
  item_new = gtk_tree_item_new_with_label(buffer);
  gtk_tree_append(GTK_TREE(subtree), item_new);
  gtk_widget_show(item_new);

  tree_buttons->nb_item_add++;
}

static void
cb_remove_item(GtkWidget*w, GtkTree* tree)
{
  GList* selected_list;
  GList* clear_list;
  
  selected_list = GTK_TREE_SELECTION(tree);

  clear_list = NULL;
    
  while (selected_list) 
    {
      clear_list = g_list_prepend (clear_list, selected_list->data);
      selected_list = selected_list->next;
    }
  
  clear_list = g_list_reverse (clear_list);
  gtk_tree_remove_items(tree, clear_list);

  g_list_free (clear_list);
}

static void
cb_remove_subtree(GtkWidget*w, GtkTree* tree)
{
  GList* selected_list;
  GtkTreeItem *item;
  
  selected_list = GTK_TREE_SELECTION(tree);

  if (selected_list)
    {
      item = GTK_TREE_ITEM (selected_list->data);
      if (item->subtree)
	gtk_tree_item_remove_subtree (item);
    }
}

static void
cb_tree_changed(GtkTree* tree)
{
  sTreeButtons* tree_buttons;
  GList* selected_list;
  guint nb_selected;

  tree_buttons = gtk_object_get_user_data(GTK_OBJECT(tree));

  selected_list = GTK_TREE_SELECTION(tree);
  nb_selected = g_list_length(selected_list);

  if(nb_selected == 0) 
    {
      if(tree->children == NULL)
	gtk_widget_set_sensitive(tree_buttons->add_button, TRUE);
      else
	gtk_widget_set_sensitive(tree_buttons->add_button, FALSE);
      gtk_widget_set_sensitive(tree_buttons->remove_button, FALSE);
      gtk_widget_set_sensitive(tree_buttons->subtree_button, FALSE);
    } 
  else 
    {
      gtk_widget_set_sensitive(tree_buttons->remove_button, TRUE);
      gtk_widget_set_sensitive(tree_buttons->add_button, (nb_selected == 1));
      gtk_widget_set_sensitive(tree_buttons->subtree_button, (nb_selected == 1));
    }  
}

static void 
create_subtree(GtkWidget* item, guint level, guint nb_item_max, guint recursion_level_max)
{
  GtkWidget* item_subtree;
  GtkWidget* item_new;
  guint nb_item;
  char buffer[255];
  int no_root_item;

  if(level == recursion_level_max) return;

  if(level == -1)
    {
      /* query with no root item */
      level = 0;
      item_subtree = item;
      no_root_item = 1;
    }
  else
    {
      /* query with no root item */
      /* create subtree and associate it with current item */
      item_subtree = gtk_tree_new();
      no_root_item = 0;
    }
  
  for(nb_item = 0; nb_item < nb_item_max; nb_item++)
    {
      sprintf(buffer, "item %d-%d", level, nb_item);
      item_new = gtk_tree_item_new_with_label(buffer);
      gtk_tree_append(GTK_TREE(item_subtree), item_new);
      create_subtree(item_new, level+1, nb_item_max, recursion_level_max);
      gtk_widget_show(item_new);
    }

  if(!no_root_item)
    gtk_tree_item_set_subtree(GTK_TREE_ITEM(item), item_subtree);
}

static void
create_tree_sample(guint selection_mode, 
		   guint draw_line, guint view_line, guint no_root_item,
		   guint nb_item_max, guint recursion_level_max) 
{
  GtkWidget* window;
  GtkWidget* box1;
  GtkWidget* box2;
  GtkWidget* separator;
  GtkWidget* button;
  GtkWidget* scrolled_win;
  GtkWidget* root_tree;
  GtkWidget* root_item;
  sTreeButtons* tree_buttons;

  /* create tree buttons struct */
  if ((tree_buttons = g_malloc (sizeof (sTreeButtons))) == NULL)
    {
      g_error("can't allocate memory for tree structure !\n");
      return;
    }
  tree_buttons->nb_item_add = 0;

  /* create top level window */
  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title(GTK_WINDOW(window), "Tree Sample");
  gtk_signal_connect(GTK_OBJECT(window), "destroy",
		     (GtkSignalFunc) cb_tree_destroy_event, NULL);
  gtk_object_set_user_data(GTK_OBJECT(window), tree_buttons);

  box1 = gtk_vbox_new(FALSE, 0);
  gtk_container_add(GTK_CONTAINER(window), box1);
  gtk_widget_show(box1);

  /* create tree box */
  box2 = gtk_vbox_new(FALSE, 0);
  gtk_box_pack_start(GTK_BOX(box1), box2, TRUE, TRUE, 0);
  gtk_container_border_width(GTK_CONTAINER(box2), 5);
  gtk_widget_show(box2);

  /* create scrolled window */
  scrolled_win = gtk_scrolled_window_new (NULL, NULL);
  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
				  GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
  gtk_box_pack_start (GTK_BOX (box2), scrolled_win, TRUE, TRUE, 0);
  gtk_widget_set_usize (scrolled_win, 200, 200);
  gtk_widget_show (scrolled_win);
  
  /* create root tree widget */
  root_tree = gtk_tree_new();
  gtk_signal_connect(GTK_OBJECT(root_tree), "selection_changed",
		     (GtkSignalFunc)cb_tree_changed,
		     (gpointer)NULL);
  gtk_object_set_user_data(GTK_OBJECT(root_tree), tree_buttons);
  gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scrolled_win), root_tree);
  gtk_tree_set_selection_mode(GTK_TREE(root_tree), selection_mode);
  gtk_tree_set_view_lines(GTK_TREE(root_tree), draw_line);
  gtk_tree_set_view_mode(GTK_TREE(root_tree), !view_line);
  gtk_widget_show(root_tree);

  if ( no_root_item )
    {
      /* set root tree to subtree function with root item variable */
      root_item = GTK_WIDGET(root_tree);
    }
  else
    {
      /* create root tree item widget */
      root_item = gtk_tree_item_new_with_label("root item");
      gtk_tree_append(GTK_TREE(root_tree), root_item);
      gtk_widget_show(root_item);
     }
  create_subtree(root_item, -no_root_item, nb_item_max, recursion_level_max);

  box2 = gtk_vbox_new(FALSE, 0);
  gtk_box_pack_start(GTK_BOX(box1), box2, FALSE, FALSE, 0);
  gtk_container_border_width(GTK_CONTAINER(box2), 5);
  gtk_widget_show(box2);

  button = gtk_button_new_with_label("Add Item");
  gtk_widget_set_sensitive(button, FALSE);
  gtk_signal_connect(GTK_OBJECT (button), "clicked",
		     (GtkSignalFunc) cb_add_new_item, 
		     (gpointer)root_tree);
  gtk_box_pack_start(GTK_BOX(box2), button, TRUE, TRUE, 0);
  gtk_widget_show(button);
  tree_buttons->add_button = button;

  button = gtk_button_new_with_label("Remove Item(s)");
  gtk_widget_set_sensitive(button, FALSE);
  gtk_signal_connect(GTK_OBJECT (button), "clicked",
		     (GtkSignalFunc) cb_remove_item, 
		     (gpointer)root_tree);
  gtk_box_pack_start(GTK_BOX(box2), button, TRUE, TRUE, 0);
  gtk_widget_show(button);
  tree_buttons->remove_button = button;

  button = gtk_button_new_with_label("Remove Subtree");
  gtk_widget_set_sensitive(button, FALSE);
  gtk_signal_connect(GTK_OBJECT (button), "clicked",
		     (GtkSignalFunc) cb_remove_subtree, 
		     (gpointer)root_tree);
  gtk_box_pack_start(GTK_BOX(box2), button, TRUE, TRUE, 0);
  gtk_widget_show(button);
  tree_buttons->subtree_button = button;