mutter/clutter/clutter-behaviour-scale.c
Matthew Allum c57108e030 2006-11-22 Matthew Allum <mallum@openedhand.com>
* clutter/clutter-actor.c:
        * clutter/clutter-alpha.c:
        * clutter/clutter-behaviour-opacity.c:
        * clutter/clutter-behaviour-scale.c:
        * clutter/clutter-clone-texture.c:
        * clutter/clutter-feature.c:
        * clutter/clutter-label.c:
        * clutter/clutter-main.c:
        * clutter/clutter-stage.c:
        * clutter/clutter-texture.c
        * clutter/clutter-timeline.c:
        * clutter/clutter-debug.h:
        Make CLUTTER_NOTE() just take a string rather than a func.
        Add more default context to output.

        * configure.ac:
        Fix flag and add more help docs for --ebable-debug option.
2006-11-22 20:52:27 +00:00

217 lines
5.8 KiB
C

/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006 OpenedHand
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:clutter-behaviour-scale
* @short_description: A behaviour class interpolating actors size between
* two values.
*
* #ClutterBehaviourPath interpolates actors size between two values.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-actor.h"
#include "clutter-behaviour.h"
#include "clutter-enum-types.h"
#include "clutter-main.h"
#include "clutter-fixed.h"
#include "clutter-behaviour-scale.h"
#include "clutter-private.h"
#include "clutter-debug.h"
#include <math.h>
/**
* SECTION:clutter-behaviour-scale
* @short_description: Behaviour controlling the scale of a set of actors
*
* FIXME
*/
G_DEFINE_TYPE (ClutterBehaviourScale,
clutter_behaviour_scale,
CLUTTER_TYPE_BEHAVIOUR);
struct _ClutterBehaviourScalePrivate
{
ClutterFixed scale_begin;
ClutterFixed scale_end;
ClutterGravity gravity;
};
#define CLUTTER_BEHAVIOUR_SCALE_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
CLUTTER_TYPE_BEHAVIOUR_SCALE, \
ClutterBehaviourScalePrivate))
static void
scale_frame_foreach (ClutterActor *actor,
ClutterBehaviourScale *behave)
{
ClutterFixed scale, factor;
guint32 alpha;
ClutterBehaviourScalePrivate *priv;
ClutterBehaviour *_behave;
gint sw, sh, w, h;
priv = CLUTTER_BEHAVIOUR_SCALE_GET_PRIVATE (behave);
_behave = CLUTTER_BEHAVIOUR (behave);
alpha = clutter_alpha_get_alpha (clutter_behaviour_get_alpha (_behave));
/* FIXME: use all fixed if possible
factor = CLUTTER_FIXED_DIV(CLUTTER_INT_TO_FIXED(alpha/2),
CLUTTER_INT_TO_FIXED(CLUTTER_ALPHA_MAX_ALPHA/2));
*/
factor = CLUTTER_FLOAT_TO_FIXED ((gdouble) alpha / CLUTTER_ALPHA_MAX_ALPHA);
scale = CLUTTER_FIXED_MUL (factor, (priv->scale_end - priv->scale_begin));
scale += priv->scale_begin;
clutter_actor_set_scalex (actor, scale, scale);
if (priv->gravity == CLUTTER_GRAVITY_NONE ||
priv->gravity == CLUTTER_GRAVITY_NORTH_WEST)
return;
clutter_actor_get_abs_size (actor, (guint*) &sw, (guint*) &sh);
clutter_actor_get_size (actor, (guint*) &w, (guint*) &h);
switch (priv->gravity)
{
case CLUTTER_GRAVITY_NORTH:
break;
case CLUTTER_GRAVITY_NORTH_EAST:
break;
case CLUTTER_GRAVITY_EAST:
break;
case CLUTTER_GRAVITY_SOUTH_EAST:
break;
case CLUTTER_GRAVITY_SOUTH:
break;
case CLUTTER_GRAVITY_SOUTH_WEST:
break;
case CLUTTER_GRAVITY_WEST:
break;
case CLUTTER_GRAVITY_CENTER:
CLUTTER_NOTE (MISC, "gravity %i vs %i\n", sw, w);
clutter_actor_move_by (actor, sw - w, sh - h);
default:
break;
}
}
static void
clutter_behaviour_scale_alpha_notify (ClutterBehaviour *behave,
guint32 alpha_value)
{
clutter_behaviour_actors_foreach (behave,
(GFunc) scale_frame_foreach,
CLUTTER_BEHAVIOUR_SCALE (behave));
}
static void
clutter_behaviour_scale_class_init (ClutterBehaviourScaleClass *klass)
{
ClutterBehaviourClass *behave_class;
behave_class = (ClutterBehaviourClass*) klass;
behave_class->alpha_notify = clutter_behaviour_scale_alpha_notify;
g_type_class_add_private (klass, sizeof (ClutterBehaviourScalePrivate));
}
static void
clutter_behaviour_scale_init (ClutterBehaviourScale *self)
{
ClutterBehaviourScalePrivate *priv;
self->priv = priv = CLUTTER_BEHAVIOUR_SCALE_GET_PRIVATE (self);
}
/**
* clutter_behaviour_scale_new:
* @alpha: a #ClutterAlpha
* @scale_begin: initial scale factor
* @scale_end: final scale factor
* @gravity: FIXME
*
* Creates a new #ClutterBehaviourScale instance.
*
* Return value: the newly created #ClutterBehaviourScale
*
* Since: 0.2
*/
ClutterBehaviour *
clutter_behaviour_scale_new (ClutterAlpha *alpha,
gdouble scale_begin,
gdouble scale_end,
ClutterGravity gravity)
{
return clutter_behaviour_scale_newx (alpha,
CLUTTER_FLOAT_TO_FIXED (scale_begin),
CLUTTER_FLOAT_TO_FIXED (scale_end),
gravity);
}
/**
* clutter_behaviour_scale_newx:
* @alpha: a #ClutterAlpha
* @scale_begin: initial scale factor
* @scale_end: final scale factor
*
* A fixed point implementation of clutter_behaviour_scale_new()
*
* Return value: the newly created #ClutterBehaviourScale
*
* Since: 0.2
*/
ClutterBehaviour *
clutter_behaviour_scale_newx (ClutterAlpha *alpha,
ClutterFixed scale_begin,
ClutterFixed scale_end,
ClutterGravity gravity)
{
ClutterBehaviourScale *behave;
behave = g_object_new (CLUTTER_TYPE_BEHAVIOUR_SCALE,
"alpha", alpha,
NULL);
behave->priv->scale_begin = scale_begin;
behave->priv->scale_end = scale_end;
behave->priv->gravity = gravity;
return CLUTTER_BEHAVIOUR (behave);
}