mirror of
https://github.com/brl/mutter.git
synced 2025-02-17 05:44:08 +00:00
141a155690
A layout manager instance makes only sense if it's owned by a container. For this reason, it should have a floating reference instead of a full reference on construction; this allows constructing Boxes like: box = clutter_box_new (clutter_fixed_layout_new ()); without leaking the layout manager instance.
183 lines
6.2 KiB
C
183 lines
6.2 KiB
C
/**
|
|
* SECTION:clutter-layout-manager
|
|
* @short_description: Layout managers base class
|
|
*
|
|
* #ClutterLayoutManager is FIXME
|
|
*
|
|
* #ClutterLayoutManager is available since Clutter 1.2
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "clutter-debug.h"
|
|
#include "clutter-layout-manager.h"
|
|
#include "clutter-marshal.h"
|
|
#include "clutter-private.h"
|
|
|
|
#define LAYOUT_MANAGER_WARN_NOT_IMPLEMENTED(m,method) G_STMT_START { \
|
|
GObject *_obj = G_OBJECT (m); \
|
|
g_warning ("Layout managers of type %s do not implement " \
|
|
"the ClutterLayoutManager::%s method", \
|
|
G_OBJECT_TYPE_NAME (_obj), \
|
|
(method)); } G_STMT_END
|
|
|
|
G_DEFINE_ABSTRACT_TYPE (ClutterLayoutManager,
|
|
clutter_layout_manager,
|
|
G_TYPE_INITIALLY_UNOWNED);
|
|
|
|
static void
|
|
layout_manager_real_get_preferred_width (ClutterLayoutManager *manager,
|
|
ClutterContainer *container,
|
|
gfloat for_height,
|
|
gfloat *min_width_p,
|
|
gfloat *nat_width_p)
|
|
{
|
|
LAYOUT_MANAGER_WARN_NOT_IMPLEMENTED (manager, "get_preferred_width");
|
|
|
|
if (min_width_p)
|
|
*min_width_p = 0.0;
|
|
|
|
if (nat_width_p)
|
|
*nat_width_p = 0.0;
|
|
}
|
|
|
|
static void
|
|
layout_manager_real_get_preferred_height (ClutterLayoutManager *manager,
|
|
ClutterContainer *container,
|
|
gfloat for_width,
|
|
gfloat *min_height_p,
|
|
gfloat *nat_height_p)
|
|
{
|
|
LAYOUT_MANAGER_WARN_NOT_IMPLEMENTED (manager, "get_preferred_height");
|
|
|
|
if (min_height_p)
|
|
*min_height_p = 0.0;
|
|
|
|
if (nat_height_p)
|
|
*nat_height_p = 0.0;
|
|
}
|
|
|
|
static void
|
|
layout_manager_real_allocate (ClutterLayoutManager *manager,
|
|
ClutterContainer *container,
|
|
const ClutterActorBox *allocation,
|
|
ClutterAllocationFlags flags)
|
|
{
|
|
LAYOUT_MANAGER_WARN_NOT_IMPLEMENTED (manager, "allocate");
|
|
}
|
|
|
|
static void
|
|
clutter_layout_manager_class_init (ClutterLayoutManagerClass *klass)
|
|
{
|
|
klass->get_preferred_width = layout_manager_real_get_preferred_width;
|
|
klass->get_preferred_height = layout_manager_real_get_preferred_height;
|
|
klass->allocate = layout_manager_real_allocate;
|
|
}
|
|
|
|
static void
|
|
clutter_layout_manager_init (ClutterLayoutManager *manager)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* clutter_layout_manager_get_preferred_width:
|
|
* @manager: a #ClutterLayoutManager
|
|
* @container: the #ClutterContainer using @manager
|
|
* @for_height: the height for which the width should be computed, or -1
|
|
* @min_width_p: (out) (allow-none): return location for the minimum width
|
|
* of the layout, or %NULL
|
|
* @nat_width_p: (out) (allow-none): return location for the natural width
|
|
* of the layout, or %NULL
|
|
*
|
|
* Computes the minimum and natural widths of the @container according
|
|
* to @manager.
|
|
*
|
|
* See also clutter_actor_get_preferred_width()
|
|
*
|
|
* Since: 1.2
|
|
*/
|
|
void
|
|
clutter_layout_manager_get_preferred_width (ClutterLayoutManager *manager,
|
|
ClutterContainer *container,
|
|
gfloat for_height,
|
|
gfloat *min_width_p,
|
|
gfloat *nat_width_p)
|
|
{
|
|
ClutterLayoutManagerClass *klass;
|
|
|
|
g_return_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager));
|
|
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
|
|
|
|
klass = CLUTTER_LAYOUT_MANAGER_GET_CLASS (manager);
|
|
klass->get_preferred_width (manager, container, for_height,
|
|
min_width_p,
|
|
nat_width_p);
|
|
}
|
|
|
|
/**
|
|
* clutter_layout_manager_get_preferred_height:
|
|
* @manager: a #ClutterLayoutManager
|
|
* @container: the #ClutterContainer using @manager
|
|
* @for_width: the width for which the height should be computed, or -1
|
|
* @min_height_p: (out) (allow-none): return location for the minimum height
|
|
* of the layout, or %NULL
|
|
* @nat_height_p: (out) (allow-none): return location for the natural height
|
|
* of the layout, or %NULL
|
|
*
|
|
* Computes the minimum and natural heights of the @container according
|
|
* to @manager.
|
|
*
|
|
* See also clutter_actor_get_preferred_height()
|
|
*
|
|
* Since: 1.2
|
|
*/
|
|
void
|
|
clutter_layout_manager_get_preferred_height (ClutterLayoutManager *manager,
|
|
ClutterContainer *container,
|
|
gfloat for_width,
|
|
gfloat *min_height_p,
|
|
gfloat *nat_height_p)
|
|
{
|
|
ClutterLayoutManagerClass *klass;
|
|
|
|
g_return_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager));
|
|
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
|
|
|
|
klass = CLUTTER_LAYOUT_MANAGER_GET_CLASS (manager);
|
|
klass->get_preferred_height (manager, container, for_width,
|
|
min_height_p,
|
|
nat_height_p);
|
|
}
|
|
|
|
/**
|
|
* clutter_layout_manager_allocate:
|
|
* @manager: a #ClutterLayoutManager
|
|
* @container: the #ClutterContainer using @manager
|
|
* @allocation: the #ClutterActorBox containing the allocated area
|
|
* of @container
|
|
* @flags: the allocation flags
|
|
*
|
|
* Allocates the children of @container given an area
|
|
*
|
|
* See also clutter_actor_allocate()
|
|
*
|
|
* Since: 1.2
|
|
*/
|
|
void
|
|
clutter_layout_manager_allocate (ClutterLayoutManager *manager,
|
|
ClutterContainer *container,
|
|
const ClutterActorBox *allocation,
|
|
ClutterAllocationFlags flags)
|
|
{
|
|
ClutterLayoutManagerClass *klass;
|
|
|
|
g_return_if_fail (CLUTTER_IS_LAYOUT_MANAGER (manager));
|
|
g_return_if_fail (CLUTTER_IS_CONTAINER (container));
|
|
g_return_if_fail (allocation != NULL);
|
|
|
|
klass = CLUTTER_LAYOUT_MANAGER_GET_CLASS (manager);
|
|
klass->allocate (manager, container, allocation, flags);
|
|
}
|