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02e542eb9f
* clutter/clutter-behaviour-scale.c: (clutter_behaviour_scale_set_gravity): Notify on the right property name.
579 lines
18 KiB
C
579 lines
18 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 controlling scale
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*
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* A #ClutterBehaviourScale 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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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_start[2];
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ClutterFixed scale_end[2];
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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_X_SCALE_START,
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PROP_Y_SCALE_START,
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PROP_X_SCALE_END,
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PROP_Y_SCALE_END,
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PROP_SCALE_GRAVITY
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};
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typedef struct {
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ClutterFixed scale_x;
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ClutterFixed scale_y;
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} ScaleFrameClosure;
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static void
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scale_frame_foreach (ClutterBehaviour *behaviour,
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ClutterActor *actor,
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gpointer data)
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{
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ClutterBehaviourScalePrivate *priv =
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CLUTTER_BEHAVIOUR_SCALE (behaviour)->priv;
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ScaleFrameClosure *closure = data;
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ClutterGravity gravity = priv->gravity;
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/* Don't mess with the actor anchor point of gravity is set to
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* none
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*/
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if (gravity != CLUTTER_GRAVITY_NONE)
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clutter_actor_set_anchor_point_from_gravity (actor, gravity);
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clutter_actor_set_scalex (actor, closure->scale_x, closure->scale_y);
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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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ClutterBehaviourScalePrivate *priv;
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ClutterFixed scale_x, scale_y, factor;
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ScaleFrameClosure closure = { 0, };
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priv = CLUTTER_BEHAVIOUR_SCALE (behave)->priv;
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factor = CLUTTER_INT_TO_FIXED (alpha_value) / CLUTTER_ALPHA_MAX_ALPHA;
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scale_x = CLUTTER_FIXED_MUL (factor,
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(priv->scale_end[0] - priv->scale_start[0]));
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scale_x += priv->scale_start[0];
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scale_y = CLUTTER_FIXED_MUL (factor,
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(priv->scale_end[1] - priv->scale_start[1]));
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scale_y += priv->scale_start[1];
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closure.scale_x = scale_x;
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closure.scale_y = scale_y;
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clutter_behaviour_actors_foreach (behave,
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scale_frame_foreach,
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&closure);
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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_X_SCALE_START:
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priv->scale_start[0] =
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CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
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break;
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case PROP_X_SCALE_END:
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priv->scale_end[0] =
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CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
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break;
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case PROP_Y_SCALE_START:
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priv->scale_start[1] =
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CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
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break;
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case PROP_Y_SCALE_END:
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priv->scale_end[1] =
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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_X_SCALE_START:
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g_value_set_double (value, CLUTTER_FIXED_TO_FLOAT (priv->scale_start[0]));
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break;
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case PROP_X_SCALE_END:
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g_value_set_double (value, CLUTTER_FIXED_TO_FLOAT (priv->scale_end[0]));
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break;
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case PROP_Y_SCALE_START:
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g_value_set_double (value, CLUTTER_FIXED_TO_FLOAT (priv->scale_start[1]));
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break;
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case PROP_Y_SCALE_END:
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g_value_set_double (value, CLUTTER_FIXED_TO_FLOAT (priv->scale_end[1]));
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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:x-scale-start:
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*
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* The initial scaling factor on the X axis for the actors.
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*
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* Since: 0.6
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*/
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g_object_class_install_property (gobject_class,
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PROP_X_SCALE_START,
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g_param_spec_double ("x-scale-start",
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"X Start Scale",
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"Initial scale on the X axis",
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0.0, G_MAXDOUBLE,
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1.0,
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CLUTTER_PARAM_READWRITE));
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/**
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* ClutterBehaviourScale:x-scale-end:
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*
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* The final scaling factor on the X axis for the actors.
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*
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* Since: 0.6
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*/
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g_object_class_install_property (gobject_class,
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PROP_X_SCALE_END,
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g_param_spec_double ("x-scale-end",
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"X End Scale",
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"Final scale on the X axis",
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0.0, G_MAXDOUBLE,
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1.0,
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CLUTTER_PARAM_READWRITE));
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/**
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* ClutterBehaviourScale:y-scale-start:
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*
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* The initial scaling factor on the Y axis for the actors.
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*
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* Since: 0.6
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*/
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g_object_class_install_property (gobject_class,
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PROP_Y_SCALE_START,
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g_param_spec_double ("y-scale-start",
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"Y Start Scale",
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"Initial scale on the Y axis",
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0.0, G_MAXDOUBLE,
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1.0,
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CLUTTER_PARAM_READWRITE));
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/**
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* ClutterBehaviourScale:y-scale-end:
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*
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* The final scaling factor on the Y axis for the actors.
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*
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* Since: 0.6
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*/
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g_object_class_install_property (gobject_class,
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PROP_X_SCALE_END,
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g_param_spec_double ("y-scale-end",
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"Y End Scale",
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"Final scale on the Y axis",
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0.0, 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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* @x_scale_start: initial scale factor on the X axis
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* @y_scale_start: initial scale factor on the Y axis
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* @x_scale_end: final scale factor on the X axis
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* @y_scale_end: final scale factor on the Y axis
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* @gravity: a #ClutterGravity for the scale.
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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 x_scale_start,
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gdouble y_scale_start,
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gdouble x_scale_end,
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gdouble y_scale_end,
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ClutterGravity gravity)
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{
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g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
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return clutter_behaviour_scale_newx (alpha,
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CLUTTER_FLOAT_TO_FIXED (x_scale_start),
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CLUTTER_FLOAT_TO_FIXED (y_scale_start),
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CLUTTER_FLOAT_TO_FIXED (x_scale_end),
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CLUTTER_FLOAT_TO_FIXED (y_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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* @x_scale_start: initial scale factor on the X axis
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* @y_scale_start: initial scale factor on the Y axis
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* @x_scale_end: final scale factor on the X axis
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* @y_scale_end: final scale factor on the Y axis
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* @gravity: a #ClutterGravity for the scale.
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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 x_scale_start,
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ClutterFixed y_scale_start,
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ClutterFixed x_scale_end,
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ClutterFixed y_scale_end,
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ClutterGravity gravity)
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{
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ClutterBehaviourScale *behave;
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g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
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behave = g_object_new (CLUTTER_TYPE_BEHAVIOUR_SCALE, "alpha", alpha, NULL);
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behave->priv->scale_start[0] = x_scale_start;
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behave->priv->scale_start[1] = y_scale_start;
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behave->priv->scale_end[0] = x_scale_end;
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behave->priv->scale_end[1] = y_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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/**
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* clutter_behaviour_scale_set_bounds:
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* @scale: a #ClutterBehaviourScale
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* @x_scale_start: initial scale factor on the X axis
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* @y_scale_start: initial scale factor on the Y axis
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* @x_scale_end: final scale factor on the X axis
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* @y_scale_end: final scale factor on the Y axis
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*
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* Sets the bounds used by scale behaviour.
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*
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* Since: 0.6
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*/
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void
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clutter_behaviour_scale_set_bounds (ClutterBehaviourScale *scale,
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gdouble x_scale_start,
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gdouble y_scale_start,
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gdouble x_scale_end,
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gdouble y_scale_end)
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{
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g_return_if_fail (CLUTTER_IS_BEHAVIOUR_SCALE (scale));
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clutter_behaviour_scale_set_boundsx (scale,
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CLUTTER_FLOAT_TO_FIXED (x_scale_start),
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CLUTTER_FLOAT_TO_FIXED (y_scale_start),
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CLUTTER_FLOAT_TO_FIXED (x_scale_end),
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CLUTTER_FLOAT_TO_FIXED (y_scale_end));
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}
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/**
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* clutter_behaviour_scale_get_bounds:
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* @scale: a #ClutterBehaviourScale
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* @x_scale_start: return location for the initial scale factor on the X
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* axis, or %NULL
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* @y_scale_start: return location for the initial scale factor on the Y
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* axis, or %NULL
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* @x_scale_end: return location for the final scale factor on the X axis,
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* or %NULL
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* @y_scale_end: return location for the final scale factor on the Y axis,
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* or %NULL
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*
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* Retrieves the bounds used by scale behaviour.
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*
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* Since: 0.4
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*/
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void
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clutter_behaviour_scale_get_bounds (ClutterBehaviourScale *scale,
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gdouble *x_scale_start,
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gdouble *y_scale_start,
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gdouble *x_scale_end,
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gdouble *y_scale_end)
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{
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ClutterBehaviourScalePrivate *priv;
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g_return_if_fail (CLUTTER_IS_BEHAVIOUR_SCALE (scale));
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priv = scale->priv;
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if (x_scale_start)
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*x_scale_start = CLUTTER_FIXED_TO_DOUBLE (priv->scale_start[0]);
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if (x_scale_end)
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*x_scale_end = CLUTTER_FIXED_TO_DOUBLE (priv->scale_end[0]);
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if (y_scale_start)
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*y_scale_start = CLUTTER_FIXED_TO_DOUBLE (priv->scale_start[1]);
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if (y_scale_end)
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*y_scale_end = CLUTTER_FIXED_TO_DOUBLE (priv->scale_end[1]);
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}
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/**
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* clutter_behaviour_scale_set_boundsx:
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* @scale: a #ClutterBehaviourScale
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* @x_scale_start: initial scale factor on the X axis
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* @y_scale_start: initial scale factor on the Y axis
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* @x_scale_end: final scale factor on the X axis
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* @y_scale_end: final scale factor on the Y axis
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*
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* Fixed point version of clutter_behaviour_scale_set_bounds().
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*
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* Sets the bounds used by scale behaviour.
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*
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* Since: 0.6
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*/
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void
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clutter_behaviour_scale_set_boundsx (ClutterBehaviourScale *scale,
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ClutterFixed x_scale_start,
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ClutterFixed y_scale_start,
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ClutterFixed x_scale_end,
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ClutterFixed y_scale_end)
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{
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ClutterBehaviourScalePrivate *priv;
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g_return_if_fail (CLUTTER_IS_BEHAVIOUR_SCALE (scale));
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priv = scale->priv;
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g_object_freeze_notify (G_OBJECT (scale));
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if (priv->scale_start[0] != x_scale_start)
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{
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priv->scale_start[0] = x_scale_start;
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g_object_notify (G_OBJECT (scale), "x-scale-start");
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}
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if (priv->scale_start[1] != y_scale_start)
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{
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priv->scale_start[1] = y_scale_start;
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g_object_notify (G_OBJECT (scale), "y-scale-start");
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}
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if (priv->scale_end[0] != x_scale_end)
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{
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priv->scale_end[0] = x_scale_end;
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g_object_notify (G_OBJECT (scale), "x-scale-end");
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}
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if (priv->scale_end[1] != y_scale_end)
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{
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priv->scale_end[1] = y_scale_end;
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g_object_notify (G_OBJECT (scale), "y-scale-end");
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}
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g_object_thaw_notify (G_OBJECT (scale));
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}
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/**
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* clutter_behaviour_scale_get_boundsx:
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* @scale: a #ClutterBehaviourScale
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* @x_scale_start: return location for the initial scale factor on the X
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* axis, or %NULL
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* @y_scale_start: return location for the initial scale factor on the Y
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* axis, or %NULL
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* @x_scale_end: return location for the final scale factor on the X axis,
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* or %NULL
|
|
* @y_scale_end: return location for the final scale factor on the Y axis,
|
|
* or %NULL
|
|
*
|
|
* Fixed point version of clutter_behaviour_scale_get_bounds().
|
|
*
|
|
* Retrieves the bounds used by scale behaviour.
|
|
*
|
|
* Since: 0.4
|
|
*/
|
|
void
|
|
clutter_behaviour_scale_get_boundsx (ClutterBehaviourScale *scale,
|
|
ClutterFixed *x_scale_start,
|
|
ClutterFixed *y_scale_start,
|
|
ClutterFixed *x_scale_end,
|
|
ClutterFixed *y_scale_end)
|
|
{
|
|
ClutterBehaviourScalePrivate *priv;
|
|
|
|
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_SCALE (scale));
|
|
|
|
priv = scale->priv;
|
|
|
|
if (x_scale_start)
|
|
*x_scale_start = priv->scale_start[0];
|
|
|
|
if (x_scale_end)
|
|
*x_scale_end = priv->scale_end[0];
|
|
|
|
if (y_scale_start)
|
|
*y_scale_start = priv->scale_start[1];
|
|
|
|
if (y_scale_end)
|
|
*y_scale_end = priv->scale_end[1];
|
|
}
|
|
|
|
/**
|
|
* clutter_behaviour_scale_set_gravity:
|
|
* @scale: a #ClutterBehaviourScale
|
|
* @gravity: the gravity of the scaling
|
|
*
|
|
* Sets the #ClutterGravity applied by the scale behaviour.
|
|
*
|
|
* Since: 0.6
|
|
*/
|
|
void
|
|
clutter_behaviour_scale_set_gravity (ClutterBehaviourScale *scale,
|
|
ClutterGravity gravity)
|
|
{
|
|
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_SCALE (scale));
|
|
|
|
if (scale->priv->gravity != gravity)
|
|
{
|
|
scale->priv->gravity = gravity;
|
|
|
|
g_object_notify (G_OBJECT (scale), "scale-gravity");
|
|
}
|
|
}
|
|
/**
|
|
* clutter_behaviour_scale_get_gravity:
|
|
* @scale: a #ClutterBehaviourScale
|
|
*
|
|
* Retrieves the #ClutterGravity applied by the scale behaviour.
|
|
*
|
|
* Return value: the gravity used by the behaviour
|
|
*
|
|
* Since: 0.4
|
|
*/
|
|
ClutterGravity
|
|
clutter_behaviour_scale_get_gravity (ClutterBehaviourScale *scale)
|
|
{
|
|
g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_SCALE (scale), CLUTTER_GRAVITY_NONE);
|
|
|
|
return scale->priv->gravity;
|
|
}
|