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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2009 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Author:
* Emmanuele Bassi <ebassi@linux.intel.com>
*
* Based on the fixed layout code inside clutter-group.c
*/
/**
* SECTION:clutter-fixed-layout
* @short_description: A fixed layout manager
*
* #ClutterFixedLayout is a layout manager implementing the same
* layout policies as #ClutterGroup.
*
* #ClutterFixedLayout is available since Clutter 1.2
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-debug.h"
#include "clutter-fixed-layout.h"
#include "clutter-private.h"
G_DEFINE_TYPE (ClutterFixedLayout,
clutter_fixed_layout,
CLUTTER_TYPE_LAYOUT_MANAGER);
static void
clutter_fixed_layout_get_preferred_width (ClutterLayoutManager *manager,
ClutterContainer *container,
gfloat for_height,
gfloat *min_width_p,
gfloat *nat_width_p)
{
ClutterActor *actor, *child;
gdouble min_right;
gdouble natural_right;
min_right = 0;
natural_right = 0;
actor = CLUTTER_ACTOR (container);
for (child = clutter_actor_get_first_child (actor);
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
gfloat child_x, child_min, child_natural;
child_x = clutter_actor_get_x (child);
clutter_actor_get_preferred_size (child,
&child_min, NULL,
&child_natural, NULL);
if (child_x + child_min > min_right)
min_right = child_x + child_min;
if (child_x + child_natural > natural_right)
natural_right = child_x + child_natural;
}
if (min_width_p)
*min_width_p = min_right;
if (nat_width_p)
*nat_width_p = natural_right;
}
static void
clutter_fixed_layout_get_preferred_height (ClutterLayoutManager *manager,
ClutterContainer *container,
gfloat for_width,
gfloat *min_height_p,
gfloat *nat_height_p)
{
ClutterActor *actor, *child;
gdouble min_bottom;
gdouble natural_bottom;
min_bottom = 0;
natural_bottom = 0;
actor = CLUTTER_ACTOR (container);
for (child = clutter_actor_get_first_child (actor);
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
gfloat child_y, child_min, child_natural;
child_y = clutter_actor_get_y (child);
clutter_actor_get_preferred_size (child,
NULL, &child_min,
NULL, &child_natural);
if (child_y + child_min > min_bottom)
min_bottom = child_y + child_min;
if (child_y + child_natural > natural_bottom)
natural_bottom = child_y + child_natural;
}
if (min_height_p)
*min_height_p = min_bottom;
if (nat_height_p)
*nat_height_p = natural_bottom;
}
static void
clutter_fixed_layout_allocate (ClutterLayoutManager *manager,
ClutterContainer *container,
const ClutterActorBox *allocation,
ClutterAllocationFlags flags)
{
ClutterActor *child;
for (child = clutter_actor_get_first_child (CLUTTER_ACTOR (container));
child != NULL;
child = clutter_actor_get_next_sibling (child))
{
clutter_actor_allocate_preferred_size (child, flags);
}
}
static void
clutter_fixed_layout_class_init (ClutterFixedLayoutClass *klass)
{
ClutterLayoutManagerClass *manager_class =
CLUTTER_LAYOUT_MANAGER_CLASS (klass);
manager_class->get_preferred_width =
clutter_fixed_layout_get_preferred_width;
manager_class->get_preferred_height =
clutter_fixed_layout_get_preferred_height;
manager_class->allocate = clutter_fixed_layout_allocate;
}
static void
clutter_fixed_layout_init (ClutterFixedLayout *self)
{
}
/**
* clutter_fixed_layout_new:
*
* Creates a new #ClutterFixedLayout
*
* Return value: the newly created #ClutterFixedLayout
*
* Since: 1.2
*/
ClutterLayoutManager *
clutter_fixed_layout_new (void)
{
return g_object_new (CLUTTER_TYPE_FIXED_LAYOUT, NULL);
}
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