mutter/clutter/clutter-box.c

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/**
* SECTION:clutter-box
* @short_description: A Generic layout container
*
* #ClutterBox is a FIXME
*
* #ClutterBox is available since Clutter 1.2
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib-object.h>
#include <gobject/gvaluecollector.h>
#include "clutter-box.h"
#include "clutter-debug.h"
#include "clutter-enum-types.h"
#include "clutter-marshal.h"
#include "clutter-private.h"
#define CLUTTER_BOX_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_BOX, ClutterBoxPrivate))
struct _ClutterBoxPrivate
{
ClutterLayoutManager *manager;
GList *children;
guint changed_id;
};
enum
{
PROP_0,
PROP_LAYOUT_MANAGER
};
static void clutter_container_iface_init (ClutterContainerIface *iface);
G_DEFINE_TYPE_WITH_CODE (ClutterBox, clutter_box, CLUTTER_TYPE_ACTOR,
G_IMPLEMENT_INTERFACE (CLUTTER_TYPE_CONTAINER,
clutter_container_iface_init));
static gint
sort_by_depth (gconstpointer a,
gconstpointer b)
{
gfloat depth_a = clutter_actor_get_depth ((ClutterActor *) a);
gfloat depth_b = clutter_actor_get_depth ((ClutterActor *) b);
if (depth_a < depth_b)
return -1;
if (depth_a > depth_b)
return 1;
return 0;
}
static void
clutter_box_real_add (ClutterContainer *container,
ClutterActor *actor)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (container)->priv;
g_object_ref (actor);
priv->children = g_list_insert_sorted (priv->children,
actor,
sort_by_depth);
clutter_actor_set_parent (actor, CLUTTER_ACTOR (container));
clutter_layout_manager_add_child_meta (priv->manager,
container,
actor);
clutter_actor_queue_relayout (actor);
g_signal_emit_by_name (container, "actor-added", actor);
g_object_unref (actor);
}
static void
clutter_box_real_remove (ClutterContainer *container,
ClutterActor *actor)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (container)->priv;
g_object_ref (actor);
priv->children = g_list_remove (priv->children, actor);
clutter_actor_unparent (actor);
clutter_layout_manager_remove_child_meta (priv->manager,
container,
actor);
clutter_actor_queue_relayout (CLUTTER_ACTOR (container));
g_signal_emit_by_name (container, "actor-removed", actor);
g_object_unref (actor);
}
static void
clutter_box_real_foreach (ClutterContainer *container,
ClutterCallback callback,
gpointer user_data)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (container)->priv;
GList *l;
for (l = priv->children; l != NULL; l = l->next)
(* callback) (l->data, user_data);
}
static void
clutter_box_real_raise (ClutterContainer *container,
ClutterActor *actor,
ClutterActor *sibling)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (container)->priv;
priv->children = g_list_remove (priv->children, actor);
if (sibling == NULL)
priv->children = g_list_append (priv->children, actor);
else
{
gint index_ = g_list_index (priv->children, sibling) + 1;
priv->children = g_list_insert (priv->children, actor, index_);
}
clutter_actor_queue_redraw (CLUTTER_ACTOR (container));
}
static void
clutter_box_real_lower (ClutterContainer *container,
ClutterActor *actor,
ClutterActor *sibling)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (container)->priv;
priv->children = g_list_remove (priv->children, actor);
if (sibling == NULL)
priv->children = g_list_prepend (priv->children, actor);
else
{
gint index_ = g_list_index (priv->children, sibling);
priv->children = g_list_insert (priv->children, actor, index_);
}
clutter_actor_queue_redraw (CLUTTER_ACTOR (container));
}
static void
clutter_box_real_sort_depth_order (ClutterContainer *container)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (container)->priv;
priv->children = g_list_sort (priv->children, sort_by_depth);
clutter_actor_queue_redraw (CLUTTER_ACTOR (container));
}
static void
clutter_container_iface_init (ClutterContainerIface *iface)
{
iface->add = clutter_box_real_add;
iface->remove = clutter_box_real_remove;
iface->foreach = clutter_box_real_foreach;
iface->raise = clutter_box_real_raise;
iface->lower = clutter_box_real_lower;
iface->sort_depth_order = clutter_box_real_sort_depth_order;
}
static void
clutter_box_real_paint (ClutterActor *actor)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
g_list_foreach (priv->children, (GFunc) clutter_actor_paint, NULL);
}
static void
clutter_box_real_pick (ClutterActor *actor,
const ClutterColor *pick)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
CLUTTER_ACTOR_CLASS (clutter_box_parent_class)->pick (actor, pick);
g_list_foreach (priv->children, (GFunc) clutter_actor_paint, NULL);
}
static void
clutter_box_real_get_preferred_width (ClutterActor *actor,
gfloat for_height,
gfloat *min_width,
gfloat *natural_width)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
if (priv->children == NULL)
{
if (min_width)
*min_width = 0.0;
if (natural_width)
*natural_width = 0.0;
return;
}
clutter_layout_manager_get_preferred_width (priv->manager,
CLUTTER_CONTAINER (actor),
for_height,
min_width, natural_width);
}
static void
clutter_box_real_get_preferred_height (ClutterActor *actor,
gfloat for_width,
gfloat *min_height,
gfloat *natural_height)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
if (priv->children == NULL)
{
if (min_height)
*min_height = 0.0;
if (natural_height)
*natural_height = 0.0;
return;
}
clutter_layout_manager_get_preferred_height (priv->manager,
CLUTTER_CONTAINER (actor),
for_width,
min_height, natural_height);
}
static void
clutter_box_real_allocate (ClutterActor *actor,
const ClutterActorBox *allocation,
ClutterAllocationFlags flags)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
ClutterActorClass *klass;
klass = CLUTTER_ACTOR_CLASS (clutter_box_parent_class);
klass->allocate (actor, allocation, flags);
if (priv->children == NULL)
return;
clutter_layout_manager_allocate (priv->manager,
CLUTTER_CONTAINER (actor),
allocation, flags);
}
static void
clutter_box_destroy (ClutterActor *actor)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (actor)->priv;
GList *l;
for (l = priv->children; l != NULL; l = l->next)
clutter_actor_destroy (l->data);
CLUTTER_ACTOR_CLASS (clutter_box_parent_class)->destroy (actor);
}
static void
on_layout_changed (ClutterLayoutManager *manager,
ClutterActor *self)
{
clutter_actor_queue_relayout (self);
}
static inline void
set_layout_manager (ClutterBox *self,
ClutterLayoutManager *manager)
{
ClutterBoxPrivate *priv = self->priv;
if (priv->manager == manager)
return;
if (priv->manager != NULL)
{
if (priv->changed_id != 0)
g_signal_handler_disconnect (priv->manager, priv->changed_id);
clutter_layout_manager_set_container (priv->manager, NULL);
g_object_unref (priv->manager);
priv->manager = NULL;
priv->changed_id = 0;
}
if (manager != NULL)
{
priv->manager = g_object_ref_sink (manager);
clutter_layout_manager_set_container (manager,
CLUTTER_CONTAINER (self));
priv->changed_id =
g_signal_connect (priv->manager, "layout-changed",
G_CALLBACK (on_layout_changed),
self);
}
clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
g_object_notify (G_OBJECT (self), "layout-manager");
}
static void
clutter_box_dispose (GObject *gobject)
{
ClutterBox *self = CLUTTER_BOX (gobject);
set_layout_manager (self, NULL);
G_OBJECT_CLASS (clutter_box_parent_class)->dispose (gobject);
}
static void
clutter_box_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBox *self = CLUTTER_BOX (gobject);
switch (prop_id)
{
case PROP_LAYOUT_MANAGER:
set_layout_manager (self, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_box_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterBoxPrivate *priv = CLUTTER_BOX (gobject)->priv;
switch (prop_id)
{
case PROP_LAYOUT_MANAGER:
g_value_set_object (value, priv->manager);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_box_class_init (ClutterBoxClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
GParamSpec *pspec;
g_type_class_add_private (klass, sizeof (ClutterBoxPrivate));
actor_class->get_preferred_width = clutter_box_real_get_preferred_width;
actor_class->get_preferred_height = clutter_box_real_get_preferred_height;
actor_class->allocate = clutter_box_real_allocate;
actor_class->paint = clutter_box_real_paint;
actor_class->pick = clutter_box_real_pick;
actor_class->destroy = clutter_box_destroy;
gobject_class->set_property = clutter_box_set_property;
gobject_class->get_property = clutter_box_get_property;
gobject_class->dispose = clutter_box_dispose;
pspec = g_param_spec_object ("layout-manager",
"Layout Manager",
"The layout manager used by the box",
CLUTTER_TYPE_LAYOUT_MANAGER,
CLUTTER_PARAM_READWRITE |
G_PARAM_CONSTRUCT);
g_object_class_install_property (gobject_class,
PROP_LAYOUT_MANAGER,
pspec);
}
static void
clutter_box_init (ClutterBox *self)
{
self->priv = CLUTTER_BOX_GET_PRIVATE (self);
}
/**
* clutter_box_new:
* @manager: a #ClutterLayoutManager
*
* Creates a new #ClutterBox. The children of the box will be layed
* out by the passed @manager
*
* Return value: the newly created #ClutterBox actor
*
* Since: 1.0
*/
ClutterActor *
clutter_box_new (ClutterLayoutManager *manager)
{
g_return_val_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager), NULL);
return g_object_new (CLUTTER_TYPE_BOX,
"layout-manager", manager,
NULL);
}
/**
* clutter_box_set_layout_manager:
* @box: a #ClutterBox
* @manager: a #ClutterLayoutManager
*
* Sets the #ClutterLayoutManager for @box
*
* A #ClutterLayoutManager is a delegate object that controls the
* layout of the children of @box
*
* Since: 1.2
*/
void
clutter_box_set_layout_manager (ClutterBox *box,
ClutterLayoutManager *manager)
{
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (manager == NULL || CLUTTER_IS_LAYOUT_MANAGER (manager));
set_layout_manager (box, manager);
}
/**
* clutter_box_get_layout_manager:
* @box: a #ClutterBox
*
* Retrieves the #ClutterLayoutManager instance used by @box
*
* Return value: a #ClutterLayoutManager
*
* Since: 1.2
*/
ClutterLayoutManager *
clutter_box_get_layout_manager (ClutterBox *box)
{
g_return_val_if_fail (CLUTTER_IS_BOX (box), NULL);
return box->priv->manager;
}
/**
* clutter_box_packv:
* @box: a #ClutterBox
* @actor: a #ClutterActor
* @n_properties: the number of properties to set
* @properties: (array length=n_properties) (element-type utf8): a vector
* containing the property names to set
* @values: (array length=n_properties): a vector containing the property
* values to set
*
* Vector-based variant of clutter_box_pack(), intended for language
* bindings to use
*
* Since: 1.2
*/
void
clutter_box_packv (ClutterBox *box,
ClutterActor *actor,
guint n_properties,
const gchar * const properties[],
const GValue *values)
{
ClutterContainer *container;
ClutterBoxPrivate *priv;
ClutterLayoutMeta *meta;
GObjectClass *klass;
gint i;
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
container = CLUTTER_CONTAINER (box);
clutter_container_add_actor (container, actor);
priv = box->priv;
meta = clutter_layout_manager_get_child_meta (priv->manager,
container,
actor);
if (meta == NULL)
return;
klass = G_OBJECT_GET_CLASS (meta);
for (i = 0; i < n_properties; i++)
{
const gchar *pname = properties[i];
GParamSpec *pspec;
pspec = g_object_class_find_property (klass, pname);
if (pspec == NULL)
{
g_warning ("%s: the layout property '%s' for managers "
"of type '%s' (meta type '%s') does not exist",
G_STRLOC,
pname,
G_OBJECT_TYPE_NAME (priv->manager),
G_OBJECT_TYPE_NAME (meta));
break;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("%s: the layout property '%s' for managers "
"of type '%s' (meta type '%s') is not writable",
G_STRLOC,
pspec->name,
G_OBJECT_TYPE_NAME (priv->manager),
G_OBJECT_TYPE_NAME (meta));
break;
}
clutter_layout_manager_child_set_property (priv->manager,
container, actor,
pname, &values[i]);
}
}
/**
* clutter_box_pack:
* @box: a #ClutterBox
* @actor: a #ClutterActor
* @first_property: the name of the first property to set, or %NULL
* @Varargs: a list of property name and value pairs, terminated by %NULL
*
* Adds @actor to @box and sets layout properties at the same time,
* if the #ClutterLayoutManager used by @box has them
*
* This function is a wrapper around clutter_container_add_actor()
* and clutter_layout_manager_child_set()
*
* Language bindings should use the vector-based clutter_box_addv()
* variant instead
*
* Since: 1.2
*/
void
clutter_box_pack (ClutterBox *box,
ClutterActor *actor,
const gchar *first_property,
...)
{
ClutterBoxPrivate *priv;
ClutterContainer *container;
ClutterLayoutMeta *meta;
GObjectClass *klass;
const gchar *pname;
va_list var_args;
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
container = CLUTTER_CONTAINER (box);
clutter_container_add_actor (container, actor);
if (first_property == NULL || *first_property == '\0')
return;
priv = box->priv;
meta = clutter_layout_manager_get_child_meta (priv->manager,
container,
actor);
if (meta == NULL)
return;
klass = G_OBJECT_GET_CLASS (meta);
va_start (var_args, first_property);
pname = first_property;
while (pname)
{
GValue value = { 0, };
GParamSpec *pspec;
gchar *error;
pspec = g_object_class_find_property (klass, pname);
if (pspec == NULL)
{
g_warning ("%s: the layout property '%s' for managers "
"of type '%s' (meta type '%s') does not exist",
G_STRLOC,
pname,
G_OBJECT_TYPE_NAME (priv->manager),
G_OBJECT_TYPE_NAME (meta));
break;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_warning ("%s: the layout property '%s' for managers "
"of type '%s' (meta type '%s') is not writable",
G_STRLOC,
pspec->name,
G_OBJECT_TYPE_NAME (priv->manager),
G_OBJECT_TYPE_NAME (meta));
break;
}
g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
G_VALUE_COLLECT (&value, var_args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
break;
}
clutter_layout_manager_child_set_property (priv->manager,
container, actor,
pspec->name, &value);
g_value_unset (&value);
pname = va_arg (var_args, gchar*);
}
va_end (var_args);
}