f83ffa3520
* clutter/clutter-private.h: Add our own READABLE, WRITABLE and READWRITE paramspec flags, declaring the string components of the properties GParamSpec as static; this should shave off some bytes in the memory footprint and avoid relocations. * clutter/clutter-actor.c: * clutter/clutter-behaviour.c: * clutter/clutter-behaviour-opacity.c: * clutter/clutter-behaviour-path.c: * clutter/clutter-behavuour-scale.c: * clutter/clutter-clone-texture.c: * clutter/clutter-label.c: * clutter/clutter-rectangle.c: * clutter/clutter-stage.c: * clutter/clutter-texture.c: * clutter/clutter-timeline.c: Use the CLUTTER_PARAM_* macros we just added. * clutter/clutter-behaviour-scale.c: Add properties for the scale begin, scale end and gravity parameters. * clutter/clutter-behaviour-path.h: Mark the ClutterKnot memory management functions as public (for the bindings), since we use the slice allocator for copying knots around; add a clutter_knot_equal() function. * clutter/clutter-behaviour-path.c: (node_distance): Use clutter_knot_equal() as a fast path to avoid the sqrt() in case the nodes we are using are at the same position. (path_total_length): Additional check on the existence of the next node. * examples/behave.c: Do not leak the ClutterBehaviour objects around.
329 lines
9.5 KiB
C
329 lines
9.5 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2006 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:clutter-behaviour-scale
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* @short_description: A behaviour class interpolating actors size between
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* two values.
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*
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* #ClutterBehaviourPath interpolates actors size between two values.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "clutter-actor.h"
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#include "clutter-behaviour.h"
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#include "clutter-enum-types.h"
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#include "clutter-main.h"
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#include "clutter-fixed.h"
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#include "clutter-behaviour-scale.h"
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#include "clutter-private.h"
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#include "clutter-debug.h"
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#include <math.h>
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/**
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* SECTION:clutter-behaviour-scale
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* @short_description: Behaviour controlling the scale of a set of actors
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*
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* FIXME
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*/
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G_DEFINE_TYPE (ClutterBehaviourScale,
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clutter_behaviour_scale,
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CLUTTER_TYPE_BEHAVIOUR);
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struct _ClutterBehaviourScalePrivate
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{
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ClutterFixed scale_begin;
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ClutterFixed scale_end;
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ClutterGravity gravity;
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};
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#define CLUTTER_BEHAVIOUR_SCALE_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
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CLUTTER_TYPE_BEHAVIOUR_SCALE, \
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ClutterBehaviourScalePrivate))
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enum
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{
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PROP_0,
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PROP_SCALE_BEGIN,
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PROP_SCALE_END,
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PROP_SCALE_GRAVITY
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};
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static void
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scale_frame_foreach (ClutterActor *actor,
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ClutterBehaviourScale *behave)
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{
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ClutterFixed scale, factor;
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guint32 alpha;
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ClutterBehaviourScalePrivate *priv;
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ClutterBehaviour *_behave;
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gint sw, sh, w, h;
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priv = CLUTTER_BEHAVIOUR_SCALE_GET_PRIVATE (behave);
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_behave = CLUTTER_BEHAVIOUR (behave);
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alpha = clutter_alpha_get_alpha (clutter_behaviour_get_alpha (_behave));
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/* FIXME: use all fixed if possible
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factor = CLUTTER_FIXED_DIV(CLUTTER_INT_TO_FIXED(alpha/2),
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CLUTTER_INT_TO_FIXED(CLUTTER_ALPHA_MAX_ALPHA/2));
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*/
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factor = CLUTTER_FLOAT_TO_FIXED ((gdouble) alpha / CLUTTER_ALPHA_MAX_ALPHA);
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scale = CLUTTER_FIXED_MUL (factor, (priv->scale_end - priv->scale_begin));
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scale += priv->scale_begin;
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clutter_actor_set_scalex (actor, scale, scale);
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if (priv->gravity == CLUTTER_GRAVITY_NONE ||
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priv->gravity == CLUTTER_GRAVITY_NORTH_WEST)
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return;
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clutter_actor_get_abs_size (actor, (guint*) &sw, (guint*) &sh);
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clutter_actor_get_size (actor, (guint*) &w, (guint*) &h);
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switch (priv->gravity)
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{
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case CLUTTER_GRAVITY_NORTH:
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break;
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case CLUTTER_GRAVITY_NORTH_EAST:
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break;
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case CLUTTER_GRAVITY_EAST:
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break;
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case CLUTTER_GRAVITY_SOUTH_EAST:
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break;
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case CLUTTER_GRAVITY_SOUTH:
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break;
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case CLUTTER_GRAVITY_SOUTH_WEST:
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break;
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case CLUTTER_GRAVITY_WEST:
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break;
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case CLUTTER_GRAVITY_CENTER:
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CLUTTER_NOTE (MISC, "gravity %i vs %i\n", sw, w);
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clutter_actor_move_by (actor, sw - w, sh - h);
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default:
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break;
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}
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}
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static void
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clutter_behaviour_scale_alpha_notify (ClutterBehaviour *behave,
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guint32 alpha_value)
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{
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clutter_behaviour_actors_foreach (behave,
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(GFunc) scale_frame_foreach,
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CLUTTER_BEHAVIOUR_SCALE (behave));
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}
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static void
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clutter_behaviour_scale_set_property (GObject *gobject,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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ClutterBehaviourScalePrivate *priv;
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priv = CLUTTER_BEHAVIOUR_SCALE (gobject)->priv;
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switch (prop_id)
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{
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case PROP_SCALE_BEGIN:
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priv->scale_begin = CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
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break;
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case PROP_SCALE_END:
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priv->scale_end = CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
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break;
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case PROP_SCALE_GRAVITY:
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priv->gravity = g_value_get_enum (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_behaviour_scale_get_property (GObject *gobject,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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ClutterBehaviourScalePrivate *priv;
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priv = CLUTTER_BEHAVIOUR_SCALE (gobject)->priv;
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switch (prop_id)
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{
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case PROP_SCALE_BEGIN:
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g_value_set_double (value, CLUTTER_FIXED_TO_FLOAT (priv->scale_begin));
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break;
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case PROP_SCALE_END:
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g_value_set_double (value, CLUTTER_FIXED_TO_FLOAT (priv->scale_end));
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break;
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case PROP_SCALE_GRAVITY:
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g_value_set_enum (value, priv->gravity);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_behaviour_scale_class_init (ClutterBehaviourScaleClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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ClutterBehaviourClass *behave_class = CLUTTER_BEHAVIOUR_CLASS (klass);
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gobject_class->set_property = clutter_behaviour_scale_set_property;
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gobject_class->get_property = clutter_behaviour_scale_get_property;
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/**
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* ClutterBehaviourScale:scale-begin:
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*
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* The initial scaling factor for the actors.
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*
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* Since: 0.2
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*/
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g_object_class_install_property (gobject_class,
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PROP_SCALE_BEGIN,
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g_param_spec_double ("scale-begin",
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"Scale Begin",
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"Initial scale",
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1.0, G_MAXDOUBLE,
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1.0,
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CLUTTER_PARAM_READWRITE));
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/**
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* ClutterBehaviourScale:scale-end:
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*
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* The final scaling factor for the actors.
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*
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* Since: 0.2
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*/
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g_object_class_install_property (gobject_class,
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PROP_SCALE_END,
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g_param_spec_double ("scale-end",
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"Scale End",
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"Final scale",
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1.0, G_MAXDOUBLE,
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1.0,
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CLUTTER_PARAM_READWRITE));
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/**
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* ClutterBehaviourScale:gravity:
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*
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* The gravity of the scaling.
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*
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* Since: 0.2
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*/
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g_object_class_install_property (gobject_class,
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PROP_SCALE_GRAVITY,
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g_param_spec_enum ("scale-gravity",
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"Scale Gravity",
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"The gravity of the scaling",
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CLUTTER_TYPE_GRAVITY,
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CLUTTER_GRAVITY_CENTER,
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CLUTTER_PARAM_READWRITE));
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behave_class->alpha_notify = clutter_behaviour_scale_alpha_notify;
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g_type_class_add_private (klass, sizeof (ClutterBehaviourScalePrivate));
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}
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static void
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clutter_behaviour_scale_init (ClutterBehaviourScale *self)
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{
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ClutterBehaviourScalePrivate *priv;
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self->priv = priv = CLUTTER_BEHAVIOUR_SCALE_GET_PRIVATE (self);
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}
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/**
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* clutter_behaviour_scale_new:
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* @alpha: a #ClutterAlpha
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* @scale_begin: initial scale factor
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* @scale_end: final scale factor
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* @gravity: FIXME
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*
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* Creates a new #ClutterBehaviourScale instance.
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*
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* Return value: the newly created #ClutterBehaviourScale
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*
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* Since: 0.2
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*/
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ClutterBehaviour *
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clutter_behaviour_scale_new (ClutterAlpha *alpha,
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gdouble scale_begin,
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gdouble scale_end,
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ClutterGravity gravity)
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{
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return clutter_behaviour_scale_newx (alpha,
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CLUTTER_FLOAT_TO_FIXED (scale_begin),
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CLUTTER_FLOAT_TO_FIXED (scale_end),
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gravity);
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}
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/**
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* clutter_behaviour_scale_newx:
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* @alpha: a #ClutterAlpha
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* @scale_begin: initial scale factor
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* @scale_end: final scale factor
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*
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* A fixed point implementation of clutter_behaviour_scale_new()
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*
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* Return value: the newly created #ClutterBehaviourScale
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*
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* Since: 0.2
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*/
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ClutterBehaviour *
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clutter_behaviour_scale_newx (ClutterAlpha *alpha,
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ClutterFixed scale_begin,
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ClutterFixed scale_end,
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ClutterGravity gravity)
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{
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ClutterBehaviourScale *behave;
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behave = g_object_new (CLUTTER_TYPE_BEHAVIOUR_SCALE,
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"alpha", alpha,
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NULL);
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behave->priv->scale_begin = scale_begin;
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behave->priv->scale_end = scale_end;
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behave->priv->gravity = gravity;
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return CLUTTER_BEHAVIOUR (behave);
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}
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