/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Copyright (C) 2009,2010 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 .
*
* Author:
* Emmanuele Bassi
*/
/**
* SECTION:clutter-box
* @short_description: A Generic layout container
*
* #ClutterBox is a #ClutterActor sub-class implementing the #ClutterContainer
* interface. A Box delegates the whole size requisition and size allocation to
* a #ClutterLayoutManager instance.
*
*
* Using ClutterBox
* The following code shows how to create a #ClutterBox with
* a #ClutterLayoutManager sub-class, and how to add children to
* it via clutter_box_pack().
*
* ClutterActor *box;
* ClutterLayoutManager *layout;
*
* /* Create the layout manager first */
* layout = clutter_box_layout_new ();
* clutter_box_layout_set_homogeneous (CLUTTER_BOX_LAYOUT (layout), TRUE);
* clutter_box_layout_set_spacing (CLUTTER_BOX_LAYOUT (layout), 12);
*
* /* Then create the ClutterBox actor. The Box will take
* * ownership of the ClutterLayoutManager instance by sinking
* * its floating reference
* */
* box = clutter_box_new (layout);
*
* /* Now add children to the Box using the variadic arguments
* * function clutter_box_pack() to set layout properties
* */
* clutter_box_pack (CLUTTER_BOX (box), actor,
* "x-align", CLUTTER_BOX_ALIGNMENT_CENTER,
* "y-align", CLUTTER_BOX_ALIGNMENT_END,
* "expand", TRUE,
* NULL);
*
*
*
* #ClutterBox's clutter_box_pack() wraps the generic
* clutter_container_add_actor() function, but it also allows setting
* layout properties while adding the new child to the box.
*
* #ClutterBox is available since Clutter 1.2
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include
#include
#include "clutter-box.h"
#include "clutter-actor-private.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;
guint changed_id;
};
enum
{
PROP_0,
PROP_COLOR,
PROP_COLOR_SET,
PROP_LAST
};
static GParamSpec *obj_props[PROP_LAST] = { NULL, };
static const ClutterColor default_box_color = { 255, 255, 255, 255 };
G_DEFINE_TYPE (ClutterBox, clutter_box, CLUTTER_TYPE_ACTOR);
static gboolean
clutter_box_real_get_paint_volume (ClutterActor *actor,
ClutterPaintVolume *volume)
{
gboolean retval = FALSE;
GList *children, *l;
/* if we have a background color, and an allocation, then we need to
* set it as the base of our paint volume
*/
retval = clutter_paint_volume_set_from_allocation (volume, actor);
children = clutter_actor_get_children (actor);
/* bail out early if we don't have any child */
if (children == NULL)
return retval;
retval = TRUE;
/* otherwise, union the paint volumes of our children, in case
* any one of them decides to paint outside the parent's allocation
*/
for (l = children; l != NULL; l = l->next)
{
ClutterActor *child = l->data;
const ClutterPaintVolume *child_volume;
/* This gets the paint volume of the child transformed into the
* group's coordinate space... */
child_volume = clutter_actor_get_transformed_paint_volume (child, actor);
if (!child_volume)
return FALSE;
clutter_paint_volume_union (volume, child_volume);
}
g_list_free (children);
return retval;
}
static void
clutter_box_real_pick (ClutterActor *actor,
const ClutterColor *pick)
{
GList *children;
CLUTTER_ACTOR_CLASS (clutter_box_parent_class)->pick (actor, pick);
children = clutter_actor_get_children (actor);
g_list_foreach (children, (GFunc) clutter_actor_paint, NULL);
g_list_free (children);
}
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_COLOR:
clutter_box_set_color (self, clutter_value_get_color (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)
{
switch (prop_id)
{
case PROP_COLOR:
{
ClutterColor color;
clutter_actor_get_background_color (CLUTTER_ACTOR (gobject),
&color);
clutter_value_set_color (value, &color);
}
break;
case PROP_COLOR_SET:
{
gboolean color_set;
g_object_get (gobject, "background-color-set", &color_set, NULL);
g_value_set_boolean (value, color_set);
}
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);
g_type_class_add_private (klass, sizeof (ClutterBoxPrivate));
actor_class->get_paint_volume = clutter_box_real_get_paint_volume;
actor_class->pick = clutter_box_real_pick;
gobject_class->set_property = clutter_box_set_property;
gobject_class->get_property = clutter_box_get_property;
/**
* ClutterBox:color:
*
* The color to be used to paint the background of the
* #ClutterBox. Setting this property will set the
* #ClutterBox:color-set property as a side effect
*
* Since: 1.2
*/
obj_props[PROP_COLOR] =
clutter_param_spec_color ("color",
P_("Color"),
P_("The background color of the box"),
&default_box_color,
CLUTTER_PARAM_READWRITE);
/**
* ClutterBox:color-set:
*
* Whether the #ClutterBox:color property has been set
*
* Since: 1.2
*/
obj_props[PROP_COLOR_SET] =
g_param_spec_boolean ("color-set",
P_("Color Set"),
P_("Whether the background color is set"),
FALSE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_properties (gobject_class, PROP_LAST, obj_props);
}
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)
{
clutter_actor_set_layout_manager (CLUTTER_ACTOR (box), manager);
}
/**
* clutter_box_get_layout_manager:
* @box: a #ClutterBox
*
* Retrieves the #ClutterLayoutManager instance used by @box
*
* Return value: (transfer none): a #ClutterLayoutManager. The returned
* #ClutterLayoutManager is owned by the #ClutterBox and it should not
* be unreferenced
*
* Since: 1.2
*/
ClutterLayoutManager *
clutter_box_get_layout_manager (ClutterBox *box)
{
return clutter_actor_get_layout_manager (CLUTTER_ACTOR (box));
}
/**
* 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)
{
ClutterLayoutManager *manager;
ClutterContainer *container;
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);
manager = clutter_actor_get_layout_manager (CLUTTER_ACTOR (box));
if (manager == NULL)
return;
meta = clutter_layout_manager_get_child_meta (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 (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 (manager),
G_OBJECT_TYPE_NAME (meta));
break;
}
clutter_layout_manager_child_set_property (manager,
container, actor,
pname, &values[i]);
}
}
static inline void
clutter_box_set_property_valist (ClutterBox *box,
ClutterActor *actor,
const gchar *first_property,
va_list var_args)
{
ClutterContainer *container = CLUTTER_CONTAINER (box);
ClutterLayoutManager *manager;
ClutterLayoutMeta *meta;
GObjectClass *klass;
const gchar *pname;
manager = clutter_actor_get_layout_manager (CLUTTER_ACTOR (box));
if (manager == NULL)
return;
meta = clutter_layout_manager_get_child_meta (manager,
container,
actor);
if (meta == NULL)
return;
klass = G_OBJECT_GET_CLASS (meta);
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 (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 (manager),
G_OBJECT_TYPE_NAME (meta));
break;
}
G_VALUE_COLLECT_INIT (&value, G_PARAM_SPEC_VALUE_TYPE (pspec),
var_args, 0,
&error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
break;
}
clutter_layout_manager_child_set_property (manager,
container, actor,
pspec->name, &value);
g_value_unset (&value);
pname = va_arg (var_args, gchar*);
}
}
/**
* clutter_box_pack:
* @box: a #ClutterBox
* @actor: a #ClutterActor
* @first_property: the name of the first property to set, or %NULL
* @...: 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_packv()
* variant instead
*
* Since: 1.2
*/
void
clutter_box_pack (ClutterBox *box,
ClutterActor *actor,
const gchar *first_property,
...)
{
va_list var_args;
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
clutter_container_add_actor (CLUTTER_CONTAINER (box), actor);
if (first_property == NULL || *first_property == '\0')
return;
va_start (var_args, first_property);
clutter_box_set_property_valist (box, actor, first_property, var_args);
va_end (var_args);
}
/**
* clutter_box_pack_after:
* @box: a #ClutterBox
* @actor: a #ClutterActor
* @sibling: (allow-none): a #ClutterActor or %NULL
* @first_property: the name of the first property to set, or %NULL
* @...: a list of property name and value pairs, terminated by %NULL
*
* Adds @actor to @box, placing it after @sibling, and sets layout
* properties at the same time, if the #ClutterLayoutManager used by
* @box supports them
*
* If @sibling is %NULL then @actor is placed at the end of the
* list of children, to be allocated and painted after every other child
*
* This function is a wrapper around clutter_container_add_actor(),
* clutter_container_raise_child() and clutter_layout_manager_child_set()
*
* Since: 1.2
*/
void
clutter_box_pack_after (ClutterBox *box,
ClutterActor *actor,
ClutterActor *sibling,
const gchar *first_property,
...)
{
va_list var_args;
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
g_return_if_fail (sibling == NULL || CLUTTER_IS_ACTOR (sibling));
clutter_container_add_actor (CLUTTER_CONTAINER (box), actor);
clutter_container_raise_child (CLUTTER_CONTAINER (box), actor, sibling);
if (first_property == NULL || *first_property == '\0')
return;
va_start (var_args, first_property);
clutter_box_set_property_valist (box, actor, first_property, var_args);
va_end (var_args);
}
/**
* clutter_box_pack_before:
* @box: a #ClutterBox
* @actor: a #ClutterActor
* @sibling: (allow-none): a #ClutterActor or %NULL
* @first_property: the name of the first property to set, or %NULL
* @...: a list of property name and value pairs, terminated by %NULL
*
* Adds @actor to @box, placing it before @sibling, and sets layout
* properties at the same time, if the #ClutterLayoutManager used by
* @box supports them
*
* If @sibling is %NULL then @actor is placed at the beginning of the
* list of children, to be allocated and painted below every other child
*
* This function is a wrapper around clutter_container_add_actor(),
* clutter_container_lower_child() and clutter_layout_manager_child_set()
*
* Since: 1.2
*/
void
clutter_box_pack_before (ClutterBox *box,
ClutterActor *actor,
ClutterActor *sibling,
const gchar *first_property,
...)
{
va_list var_args;
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
g_return_if_fail (sibling == NULL || CLUTTER_IS_ACTOR (sibling));
clutter_container_add_actor (CLUTTER_CONTAINER (box), actor);
clutter_container_lower_child (CLUTTER_CONTAINER (box), actor, sibling);
if (first_property == NULL || *first_property == '\0')
return;
va_start (var_args, first_property);
clutter_box_set_property_valist (box, actor, first_property, var_args);
va_end (var_args);
}
/**
* clutter_box_pack_at:
* @box: a #ClutterBox
* @actor: a #ClutterActor
* @position: the position to insert the @actor at
* @first_property: the name of the first property to set, or %NULL
* @...: a list of property name and value pairs, terminated by %NULL
*
* Adds @actor to @box, placing it at @position, and sets layout
* properties at the same time, if the #ClutterLayoutManager used by
* @box supports them
*
* If @position is a negative number, or is larger than the number of
* children of @box, the new child is added at the end of the list of
* children
*
* Since: 1.2
*/
void
clutter_box_pack_at (ClutterBox *box,
ClutterActor *actor,
gint position,
const gchar *first_property,
...)
{
va_list var_args;
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
clutter_actor_insert_child_at_index (CLUTTER_ACTOR (box),
actor,
position);
/* we need to explicitly call this, because we're not going through
* the default code paths provided by clutter_container_add()
*/
clutter_container_create_child_meta (CLUTTER_CONTAINER (box), actor);
g_signal_emit_by_name (box, "actor-added", actor);
if (first_property == NULL || *first_property == '\0')
return;
va_start (var_args, first_property);
clutter_box_set_property_valist (box, actor, first_property, var_args);
va_end (var_args);
}
/**
* clutter_box_set_color:
* @box: a #ClutterBox
* @color: (allow-none): the background color, or %NULL to unset
*
* Sets (or unsets) the background color for @box
*
* Since: 1.2
*/
void
clutter_box_set_color (ClutterBox *box,
const ClutterColor *color)
{
g_return_if_fail (CLUTTER_IS_BOX (box));
clutter_actor_set_background_color (CLUTTER_ACTOR (box), color);
g_object_notify_by_pspec (G_OBJECT (box), obj_props[PROP_COLOR_SET]);
g_object_notify_by_pspec (G_OBJECT (box), obj_props[PROP_COLOR]);
}
/**
* clutter_box_get_color:
* @box: a #ClutterBox
* @color: (out caller-allocates): return location for a #ClutterColor
*
* Retrieves the background color of @box
*
* If the #ClutterBox:color-set property is set to %FALSE the
* returned #ClutterColor is undefined
*
* Since: 1.2
*/
void
clutter_box_get_color (ClutterBox *box,
ClutterColor *color)
{
g_return_if_fail (CLUTTER_IS_BOX (box));
g_return_if_fail (color != NULL);
clutter_actor_get_background_color (CLUTTER_ACTOR (box), color);
}