a2086f1178
Instead of overloading ClutterChildMeta with both container and layout metadata and delegate to every LayoutManager implementation to keep a backpointer to the layout manager instance, we can simply subclass ChildMeta into LayoutMeta and presto! everything works out pretty well for everyone.
176 lines
9.5 KiB
C
176 lines
9.5 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Copyright (C) 2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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* Author:
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* Emmanuele Bassi <ebassi@linux.intel.com>
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*/
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#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <clutter/clutter.h> can be included directly."
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#endif
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#ifndef __CLUTTER_LAYOUT_MANAGER_H__
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#define __CLUTTER_LAYOUT_MANAGER_H__
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#include <clutter/clutter-actor.h>
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#include <clutter/clutter-container.h>
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#include <clutter/clutter-types.h>
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_LAYOUT_MANAGER (clutter_layout_manager_get_type ())
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#define CLUTTER_LAYOUT_MANAGER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_LAYOUT_MANAGER, ClutterLayoutManager))
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#define CLUTTER_IS_LAYOUT_MANAGER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_LAYOUT_MANAGER))
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#define CLUTTER_LAYOUT_MANAGER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_LAYOUT_MANAGER, ClutterLayoutManagerClass))
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#define CLUTTER_IS_LAYOUT_MANAGER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_LAYOUT_MANAGER))
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#define CLUTTER_LAYOUT_MANAGER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_LAYOUT_MANAGER, ClutterLayoutManagerClass))
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typedef struct _ClutterLayoutManager ClutterLayoutManager;
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typedef struct _ClutterLayoutManagerClass ClutterLayoutManagerClass;
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/**
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* ClutterLayoutManager:
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*
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* The #ClutterLayoutManager structure contains only private data
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* and should be accessed using the provided API
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*
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* Since: 1.2
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*/
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struct _ClutterLayoutManager
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{
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/*< private >*/
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GInitiallyUnowned parent_instance;
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};
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/**
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* ClutterLayoutManagerClass:
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* @get_preferred_width: virtual function; override to provide a preferred
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* width for the layout manager. See also the get_preferred_width()
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* virtual function in #ClutterActor
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* @get_preferred_height: virtual function; override to provide a preferred
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* height for the layout manager. See also the get_preferred_height()
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* virtual function in #ClutterActor
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* @allocate: virtual function; override to allocate the children of the
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* layout manager. See also the allocate() virtual function in
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* #ClutterActor
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* @create_child_meta: virtual function; override to create a
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* #ClutterChildMeta instance associated to a #ClutterContainer and a
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* child #ClutterActor, used to maintain layout manager specific properties
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* @layout_changed: class handler for the #ClutterLayoutManager::layout-changed
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* signal
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*
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* The #ClutterLayoutManagerClass structure contains only private
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* data and should be accessed using the provided API
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*
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* Since: 1.2
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*/
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struct _ClutterLayoutManagerClass
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{
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/*< private >*/
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GInitiallyUnownedClass parent_class;
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/*< public >*/
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void (* get_preferred_width) (ClutterLayoutManager *manager,
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ClutterContainer *container,
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gfloat for_height,
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gfloat *minimum_width_p,
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gfloat *natural_width_p);
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void (* get_preferred_height) (ClutterLayoutManager *manager,
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ClutterContainer *container,
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gfloat for_width,
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gfloat *minimum_height_p,
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gfloat *natural_height_p);
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void (* allocate) (ClutterLayoutManager *manager,
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ClutterContainer *container,
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const ClutterActorBox *allocation,
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ClutterAllocationFlags flags);
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ClutterLayoutMeta *(* create_child_meta) (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor);
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void (* layout_changed) (ClutterLayoutManager *manager);
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/*< private >*/
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/* padding for future expansion */
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void (* _clutter_padding_1) (void);
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void (* _clutter_padding_2) (void);
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void (* _clutter_padding_3) (void);
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void (* _clutter_padding_4) (void);
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void (* _clutter_padding_5) (void);
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void (* _clutter_padding_6) (void);
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void (* _clutter_padding_7) (void);
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void (* _clutter_padding_8) (void);
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};
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GType clutter_layout_manager_get_type (void) G_GNUC_CONST;
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void clutter_layout_manager_get_preferred_width (ClutterLayoutManager *manager,
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ClutterContainer *container,
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gfloat for_height,
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gfloat *min_width_p,
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gfloat *nat_width_p);
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void clutter_layout_manager_get_preferred_height (ClutterLayoutManager *manager,
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ClutterContainer *container,
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gfloat for_width,
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gfloat *min_height_p,
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gfloat *nat_height_p);
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void clutter_layout_manager_allocate (ClutterLayoutManager *manager,
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ClutterContainer *container,
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const ClutterActorBox *allocation,
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ClutterAllocationFlags flags);
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void clutter_layout_manager_layout_changed (ClutterLayoutManager *manager);
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ClutterLayoutMeta *clutter_layout_manager_get_child_meta (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor);
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void clutter_layout_manager_add_child_meta (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor);
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void clutter_layout_manager_remove_child_meta (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor);
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void clutter_layout_manager_child_set (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor,
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const gchar *first_property,
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...) G_GNUC_NULL_TERMINATED;
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void clutter_layout_manager_child_get (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor,
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const gchar *first_property,
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...) G_GNUC_NULL_TERMINATED;
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void clutter_layout_manager_child_set_property (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor,
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const gchar *property_name,
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const GValue *value);
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void clutter_layout_manager_child_get_property (ClutterLayoutManager *manager,
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ClutterContainer *container,
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ClutterActor *actor,
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const gchar *property_name,
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GValue *value);
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G_END_DECLS
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#endif /* __CLUTTER_LAYOUT_MANAGER_H__ */
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