gimp/app/core/gimpcontainer.h

/* The GIMP -- an image manipulation program
 * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
 *
 * gimpcontainer.h
 * Copyright (C) 2001 Michael Natterer <mitch@gimp.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef __GIMP_CONTAINER_H__
#define __GIMP_CONTAINER_H__


#include "gimpobject.h"


typedef enum
{
  GIMP_CONTAINER_POLICY_STRONG,
  GIMP_CONTAINER_POLICY_WEAK
} GimpContainerPolicy;

#define GIMP_TYPE_CONTAINER_POLICY     (gimp_container_policy_get_type ())

#define GIMP_TYPE_CONTAINER            (gimp_container_get_type ())
#define GIMP_CONTAINER(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_CONTAINER, GimpContainer))
#define GIMP_CONTAINER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_CONTAINER, GimpContainerClass))
#define GIMP_IS_CONTAINER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_CONTAINER))
#define GIMP_IS_CONTAINER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_CONTAINER))
#define GIMP_CONTAINER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_CONTAINER, GimpContainerClass))


typedef struct _GimpContainerClass GimpContainerClass;

struct _GimpContainer
{
  GimpObject           parent_instance;

  /*  public, read-only  */
  GType                children_type;
  GimpContainerPolicy  policy;
  gint                 num_children;

  /*  private  */
  GList               *handlers;
  gint                 freeze_count;
};

struct _GimpContainerClass
{
  GimpObjectClass  parent_class;

  /*  signals  */
  void         (* add)                (GimpContainer       *container,
				       GimpObject          *object);
  void         (* remove)             (GimpContainer       *container,
				       GimpObject          *object);
  void         (* reorder)            (GimpContainer       *container,
				       GimpObject          *object,
				       gint                 new_index);
  void         (* freeze)             (GimpContainer       *container);
  void         (* thaw)               (GimpContainer       *container);

  /*  virtual functions  */
  gboolean     (* have)               (const GimpContainer *container,
				       const GimpObject    *object);
  void         (* foreach)            (const GimpContainer *container,
				       GFunc                func,
				       gpointer             user_data);
  GimpObject * (* get_child_by_name)  (const GimpContainer *container,
				       const gchar         *name);
  GimpObject * (* get_child_by_index) (const GimpContainer *container,
				       gint                 index);
  gint         (* get_child_index)    (const GimpContainer *container,
				       const GimpObject    *object);
};


GType        gimp_container_policy_get_type    (void) G_GNUC_CONST;

GType        gimp_container_get_type           (void) G_GNUC_CONST;

GType        gimp_container_children_type      (const GimpContainer *container);
GimpContainerPolicy gimp_container_policy      (const GimpContainer *container);
gint         gimp_container_num_children       (const GimpContainer *container);

gboolean     gimp_container_add                (GimpContainer       *container,
						GimpObject          *object);
gboolean     gimp_container_remove             (GimpContainer       *container,
						GimpObject          *object);
gboolean     gimp_container_insert             (GimpContainer       *container,
						GimpObject          *object,
						gint                 new_index);
gboolean     gimp_container_reorder            (GimpContainer       *container,
						GimpObject          *object,
						gint                 new_index);

void         gimp_container_freeze             (GimpContainer       *container);
void         gimp_container_thaw               (GimpContainer       *container);
gboolean     gimp_container_frozen             (GimpContainer       *container);

gboolean     gimp_container_have               (GimpContainer       *container,
						GimpObject          *object);
void         gimp_container_foreach            (GimpContainer       *container,
						GFunc                func,
						gpointer             user_data);

GimpObject * gimp_container_get_child_by_name  (const GimpContainer *container,
						const gchar         *name);
GimpObject * gimp_container_get_child_by_index (const GimpContainer *container,
						gint                 index);
gint         gimp_container_get_child_index    (const GimpContainer *container,
						const GimpObject    *object);

GQuark       gimp_container_add_handler        (GimpContainer       *container,
						const gchar         *signame,
						GCallback            callback,
						gpointer             callback_data);
void         gimp_container_remove_handler     (GimpContainer       *container,
						GQuark               id);


#endif  /* __GIMP_CONTAINER_H__ */