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box-layout: Remove the allocations hash table

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The BoxLayout uses a HashTable to map the latest stable allocation of
each child, in order to use that as the initial value during an
animation; this in spite of already having a perfectly valid per-child
storage as part of the layout manager: ClutterBoxChild.

The last stable allocation should be stored inside the ClutterBoxChild
instead of having it in the private data for ClutterBoxLayout. The
access remains O(1), since there is a 1:1 mapping between child and
BoxChild instances, but we save a little bit of memory and we avoid
keeping aroud allocations for old children.
This commit is contained in:
Emmanuele Bassi 2009-12-23 08:34:08 +00:00
parent c8c5e0ee39
commit b9c1de0ec7
1 changed files with 21 additions and 26 deletions
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47
clutter/clutter-box-layout.c
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@ -96,7 +96,6 @@ struct _ClutterBoxLayoutPrivate
gulong easing_mode;
guint easing_duration;
GHashTable *allocations;
guint is_vertical : 1;
guint is_pack_start : 1;
@ -115,6 +114,11 @@ struct _ClutterBoxChild
guint y_fill : 1;
guint expand : 1;
/* the last stable allocation before an animation; it is
* used as the initial ActorBox when interpolating
*/
ClutterActorBox *last_allocation;
};
enum
@ -351,6 +355,16 @@ clutter_box_child_get_property (GObject *gobject,
}
}
static void
clutter_box_child_finalize (GObject *gobject)
{
ClutterBoxChild *self = CLUTTER_BOX_CHILD (gobject);
clutter_actor_box_free (self->last_allocation);
G_OBJECT_CLASS (clutter_box_child_parent_class)->finalize (gobject);
}
static void
clutter_box_child_class_init (ClutterBoxChildClass *klass)
{
@ -359,6 +373,7 @@ clutter_box_child_class_init (ClutterBoxChildClass *klass)
gobject_class->set_property = clutter_box_child_set_property;
gobject_class->get_property = clutter_box_child_get_property;
gobject_class->finalize = clutter_box_child_finalize;
pspec = g_param_spec_boolean ("expand",
"Expand",
@ -413,6 +428,8 @@ clutter_box_child_init (ClutterBoxChild *self)
self->x_fill = self->y_fill = FALSE;
self->expand = FALSE;
self->last_allocation = NULL;
}
static inline void
@ -765,15 +782,14 @@ allocate_box_child (ClutterBoxLayout *self,
p = clutter_layout_manager_get_animation_progress (manager);
start = g_hash_table_lookup (priv->allocations, child);
start = box_child->last_allocation;
if (start == NULL)
{
/* if there is no allocation available then the child has just
* been added to the container; we put it in the final state
* and store its allocation for later
*/
start = clutter_actor_box_copy (&child_box);
g_hash_table_insert (priv->allocations, child, start);
box_child->last_allocation = clutter_actor_box_copy (&child_box);
goto do_allocate;
}
@ -797,10 +813,8 @@ allocate_box_child (ClutterBoxLayout *self,
}
else
{
ClutterActorBox *start = clutter_actor_box_copy (&child_box);
/* store the allocation for later animations */
g_hash_table_replace (priv->allocations, child, start);
box_child->last_allocation = clutter_actor_box_copy (&child_box);
}
do_allocate:
@ -975,9 +989,6 @@ clutter_box_layout_begin_animation (ClutterLayoutManager *manager,
ClutterBoxLayoutPrivate *priv = CLUTTER_BOX_LAYOUT (manager)->priv;
ClutterLayoutManagerClass *parent_class;
if (priv->is_animating)
return;
priv->is_animating = TRUE;
/* we want the default implementation */
@ -1079,16 +1090,6 @@ clutter_box_layout_get_property (GObject *gobject,
}
}
static void
clutter_box_layout_finalize (GObject *gobject)
{
ClutterBoxLayoutPrivate *priv = CLUTTER_BOX_LAYOUT (gobject)->priv;
g_hash_table_destroy (priv->allocations);
G_OBJECT_CLASS (clutter_box_layout_parent_class)->finalize (gobject);
}
static void
clutter_box_layout_class_init (ClutterBoxLayoutClass *klass)
{
@ -1100,7 +1101,6 @@ clutter_box_layout_class_init (ClutterBoxLayoutClass *klass)
gobject_class->set_property = clutter_box_layout_set_property;
gobject_class->get_property = clutter_box_layout_get_property;
gobject_class->finalize = clutter_box_layout_finalize;
layout_class->get_preferred_width =
clutter_box_layout_get_preferred_width;
@ -1231,11 +1231,6 @@ clutter_box_layout_init (ClutterBoxLayout *layout)
priv->use_animations = FALSE;
priv->easing_mode = CLUTTER_EASE_OUT_CUBIC;
priv->easing_duration = 500;
priv->allocations =
g_hash_table_new_full (NULL, NULL,
NULL,
(GDestroyNotify) clutter_actor_box_free);
}
/**