gtktreeitem.c

gtk是linux一款强大的夸平台的图形化开发工具

			    GdkEventButton *event)
{

  g_return_val_if_fail (widget != NULL, FALSE);
  g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
  g_return_val_if_fail (event != NULL, FALSE);

  if (event->type == GDK_BUTTON_PRESS
	&& GTK_WIDGET_IS_SENSITIVE(widget)
     	&& !GTK_WIDGET_HAS_FOCUS (widget))
      gtk_widget_grab_focus (widget);

  return FALSE;
}

static gint
gtk_tree_item_expose (GtkWidget      *widget,
		      GdkEventExpose *event)
{
  GdkEventExpose child_event;
  GtkBin *bin;

  g_return_val_if_fail (widget != NULL, FALSE);
  g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
  g_return_val_if_fail (event != NULL, FALSE);

  if (GTK_WIDGET_DRAWABLE (widget))
    {
      bin = GTK_BIN (widget);
      
      gtk_tree_item_paint (widget, &event->area);

      child_event = *event;
      if (bin->child && GTK_WIDGET_NO_WINDOW (bin->child) &&
	  gtk_widget_intersect (bin->child, &event->area, &child_event.area))
	gtk_widget_event (bin->child, (GdkEvent*) &child_event);
   }

  return FALSE;
}

static gint
gtk_tree_item_focus_in (GtkWidget     *widget,
			GdkEventFocus *event)
{
  g_return_val_if_fail (widget != NULL, FALSE);
  g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
  g_return_val_if_fail (event != NULL, FALSE);

  GTK_WIDGET_SET_FLAGS (widget, GTK_HAS_FOCUS);
  gtk_widget_draw_focus (widget);


  return FALSE;
}

static gint
gtk_tree_item_focus_out (GtkWidget     *widget,
			 GdkEventFocus *event)
{
  g_return_val_if_fail (widget != NULL, FALSE);
  g_return_val_if_fail (GTK_IS_TREE_ITEM (widget), FALSE);
  g_return_val_if_fail (event != NULL, FALSE);

  GTK_WIDGET_UNSET_FLAGS (widget, GTK_HAS_FOCUS);
  gtk_widget_draw_focus (widget);


  return FALSE;
}

static void
gtk_real_tree_item_select (GtkItem *item)
{    
  GtkTreeItem *tree_item;
  GtkWidget *widget;

  g_return_if_fail (item != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (item));

  tree_item = GTK_TREE_ITEM (item);
  widget = GTK_WIDGET (item);

  gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);

  if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
    gtk_widget_set_state (GTK_TREE_ITEM (item)->pixmaps_box, GTK_STATE_SELECTED);
}

static void
gtk_real_tree_item_deselect (GtkItem *item)
{
  GtkTreeItem *tree_item;
  GtkWidget *widget;

  g_return_if_fail (item != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (item));

  tree_item = GTK_TREE_ITEM (item);
  widget = GTK_WIDGET (item);

  gtk_widget_set_state (widget, GTK_STATE_NORMAL);

  if (!widget->parent || GTK_TREE (widget->parent)->view_mode == GTK_TREE_VIEW_LINE)
    gtk_widget_set_state (tree_item->pixmaps_box, GTK_STATE_NORMAL);
}

static void
gtk_real_tree_item_toggle (GtkItem *item)
{
  g_return_if_fail (item != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (item));

  if(!GTK_WIDGET_IS_SENSITIVE(item))
    return;

  if (GTK_WIDGET (item)->parent && GTK_IS_TREE (GTK_WIDGET (item)->parent))
    gtk_tree_select_child (GTK_TREE (GTK_WIDGET (item)->parent),
			   GTK_WIDGET (item));
  else
    {
      /* Should we really bother with this bit? A listitem not in a list?
       * -Johannes Keukelaar
       * yes, always be on the safe side!
       * -timj
       */
      if (GTK_WIDGET (item)->state == GTK_STATE_SELECTED)
	gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_NORMAL);
      else
	gtk_widget_set_state (GTK_WIDGET (item), GTK_STATE_SELECTED);
    }
}

static void
gtk_real_tree_item_expand (GtkTreeItem *tree_item)
{
  GtkTree* tree;
  
  g_return_if_fail (tree_item != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
  
  if (tree_item->subtree && !tree_item->expanded)
    {
      tree = GTK_TREE (GTK_WIDGET (tree_item)->parent); 
      
      /* hide subtree widget */
      gtk_widget_show (tree_item->subtree);
      
      /* hide button '+' and show button '-' */
      if (tree_item->pixmaps_box)
	{
	  gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box), 
				tree_item->plus_pix_widget);
	  gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box), 
			     tree_item->minus_pix_widget);
	}
      if (tree->root_tree)
	gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
      tree_item->expanded = TRUE;
    }
}

static void
gtk_real_tree_item_collapse (GtkTreeItem *tree_item)
{
  GtkTree* tree;
  
  g_return_if_fail (tree_item != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
  
  if (tree_item->subtree && tree_item->expanded) 
    {
      tree = GTK_TREE (GTK_WIDGET (tree_item)->parent);
      
      /* hide subtree widget */
      gtk_widget_hide (tree_item->subtree);
      
      /* hide button '-' and show button '+' */
      if (tree_item->pixmaps_box)
	{
	  gtk_container_remove (GTK_CONTAINER (tree_item->pixmaps_box), 
				tree_item->minus_pix_widget);
	  gtk_container_add (GTK_CONTAINER (tree_item->pixmaps_box), 
			     tree_item->plus_pix_widget);
	}
      if (tree->root_tree)
	gtk_widget_queue_resize (GTK_WIDGET (tree->root_tree));
      tree_item->expanded = FALSE;
    }
}

static void
gtk_tree_item_destroy (GtkObject *object)
{
  GtkTreeItem* item;
  GtkWidget* child;

  g_return_if_fail (object != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (object));

#ifdef TREE_DEBUG
  g_message("+ gtk_tree_item_destroy [object %#x]\n", (int)object);
#endif /* TREE_DEBUG */

  item = GTK_TREE_ITEM(object);

  /* free sub tree if it exist */
  child = item->subtree;
  if (child)
    {
      gtk_widget_ref (child);
      gtk_widget_unparent (child);
      gtk_widget_destroy (child);
      gtk_widget_unref (child);
      item->subtree = NULL;
    }
  
  /* free pixmaps box */
  child = item->pixmaps_box;
  if (child)
    {
      gtk_widget_ref (child);
      gtk_widget_unparent (child);
      gtk_widget_destroy (child);
      gtk_widget_unref (child);
      item->pixmaps_box = NULL;
    }
  
  
  /* destroy plus pixmap */
  if (item->plus_pix_widget)
    {
      gtk_widget_destroy (item->plus_pix_widget);
      gtk_widget_unref (item->plus_pix_widget);
      item->plus_pix_widget = NULL;
    }
  
  /* destroy minus pixmap */
  if (item->minus_pix_widget)
    {
      gtk_widget_destroy (item->minus_pix_widget);
      gtk_widget_unref (item->minus_pix_widget);
      item->minus_pix_widget = NULL;
    }
  
  /* By removing the pixmaps here, and not in unrealize, we depend on
   * the fact that a widget can never change colormap or visual.
   */
  gtk_tree_item_remove_pixmaps (item);
  
  GTK_OBJECT_CLASS (parent_class)->destroy (object);
  
#ifdef TREE_DEBUG
  g_message("- gtk_tree_item_destroy\n");
#endif /* TREE_DEBUG */
}

void
gtk_tree_item_remove_subtree (GtkTreeItem* item) 
{
  g_return_if_fail (item != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM(item));
  g_return_if_fail (item->subtree != NULL);
  
  if (GTK_TREE (item->subtree)->children)
    {
      /* The following call will remove the children and call
       * gtk_tree_item_remove_subtree() again. So we are done.
       */
      gtk_tree_remove_items (GTK_TREE (item->subtree), 
			     GTK_TREE (item->subtree)->children);
      return;
    }

  if (GTK_WIDGET_MAPPED (item->subtree))
    gtk_widget_unmap (item->subtree);
      
  gtk_widget_unparent (item->subtree);
  
  if (item->pixmaps_box)
    gtk_widget_hide (item->pixmaps_box);
  
  item->subtree = NULL;

  if (item->expanded)
    {
      item->expanded = FALSE;
      if (item->pixmaps_box)
	{
	  gtk_container_remove (GTK_CONTAINER (item->pixmaps_box), 
				item->minus_pix_widget);
	  gtk_container_add (GTK_CONTAINER (item->pixmaps_box), 
			     item->plus_pix_widget);
	}
    }
}

static void
gtk_tree_item_map (GtkWidget *widget)
{
  GtkBin *bin;
  GtkTreeItem* item;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (widget));

  bin = GTK_BIN (widget);
  item = GTK_TREE_ITEM(widget);

  GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);

  if(item->pixmaps_box &&
     GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
     !GTK_WIDGET_MAPPED (item->pixmaps_box))
    gtk_widget_map (item->pixmaps_box);

  if (bin->child &&
      GTK_WIDGET_VISIBLE (bin->child) &&
      !GTK_WIDGET_MAPPED (bin->child))
    gtk_widget_map (bin->child);

  gdk_window_show (widget->window);
}

static void
gtk_tree_item_unmap (GtkWidget *widget)
{
  GtkBin *bin;
  GtkTreeItem* item;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (widget));

  GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
  bin = GTK_BIN (widget);
  item = GTK_TREE_ITEM(widget);

  gdk_window_hide (widget->window);

  if(item->pixmaps_box &&
     GTK_WIDGET_VISIBLE (item->pixmaps_box) &&
     GTK_WIDGET_MAPPED (item->pixmaps_box))
    gtk_widget_unmap (bin->child);

  if (bin->child &&
      GTK_WIDGET_VISIBLE (bin->child) &&
      GTK_WIDGET_MAPPED (bin->child))
    gtk_widget_unmap (bin->child);
}

static void
gtk_tree_item_forall (GtkContainer *container,
		      gboolean      include_internals,
		      GtkCallback   callback,
		      gpointer      callback_data)
{
  GtkBin *bin;
  GtkTreeItem *tree_item;

  g_return_if_fail (container != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (container));
  g_return_if_fail (callback != NULL);

  bin = GTK_BIN (container);
  tree_item = GTK_TREE_ITEM (container);

  if (bin->child)
    (* callback) (bin->child, callback_data);
  if (include_internals && tree_item->subtree)
    (* callback) (tree_item->subtree, callback_data);
}