436 lines
12 KiB
C
436 lines
12 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, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* SECTION:clutter-behaviour-scale
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* @Title: ClutterBehaviourScale
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* @short_description: A behaviour controlling scale
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* @Deprecated: 1.6: Use clutter_actor_animate() with #ClutterActor:scale-x
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* and #ClutterActor:scale-y instead.
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*
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* A #ClutterBehaviourScale interpolates actors size between two values.
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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 <math.h>
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#undef CLUTTER_DISABLE_DEPRECATED
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#include "clutter-behaviour-scale.h"
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#include "clutter-debug.h"
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#include "clutter-main.h"
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#include "clutter-private.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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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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#define CLUTTER_BEHAVIOUR_SCALE_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_BEHAVIOUR_SCALE, 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_LAST
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};
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static GParamSpec *obj_props[PROP_LAST];
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typedef struct {
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gdouble scale_x;
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gdouble 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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ScaleFrameClosure *closure = data;
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clutter_actor_set_scale (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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gdouble alpha_value)
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{
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ClutterBehaviourScalePrivate *priv;
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ScaleFrameClosure closure = { 0, };
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priv = CLUTTER_BEHAVIOUR_SCALE (behave)->priv;
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/* Fix the start/end values, avoids potential rounding errors on large
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* values.
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*/
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if (alpha_value == 1.0)
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{
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closure.scale_x = priv->x_scale_end;
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closure.scale_y = priv->y_scale_end;
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}
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else if (alpha_value == 0)
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{
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closure.scale_x = priv->x_scale_start;
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closure.scale_y = priv->y_scale_start;
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}
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else
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{
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closure.scale_x = (priv->x_scale_end - priv->x_scale_start)
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* alpha_value
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+ priv->x_scale_start;
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closure.scale_y = (priv->y_scale_end - priv->y_scale_start)
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* alpha_value
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+ priv->y_scale_start;
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}
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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->x_scale_start = g_value_get_double (value);
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break;
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case PROP_X_SCALE_END:
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priv->x_scale_end = g_value_get_double (value);
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break;
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case PROP_Y_SCALE_START:
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priv->y_scale_start = g_value_get_double (value);
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break;
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case PROP_Y_SCALE_END:
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priv->y_scale_end = g_value_get_double (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, priv->x_scale_start);
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break;
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case PROP_X_SCALE_END:
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g_value_set_double (value, priv->x_scale_end);
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break;
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case PROP_Y_SCALE_START:
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g_value_set_double (value, priv->y_scale_start);
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break;
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case PROP_Y_SCALE_END:
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g_value_set_double (value, priv->y_scale_end);
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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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GParamSpec *pspec = NULL;
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g_type_class_add_private (klass, sizeof (ClutterBehaviourScalePrivate));
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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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* Deprecated: 1.6
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*/
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pspec = g_param_spec_double ("x-scale-start",
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P_("X Start Scale"),
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P_("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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obj_props[PROP_X_SCALE_START] = pspec;
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g_object_class_install_property (gobject_class,
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PROP_X_SCALE_START,
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pspec);
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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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* Deprecated: 1.6
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*/
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pspec = g_param_spec_double ("x-scale-end",
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P_("X End Scale"),
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P_("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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obj_props[PROP_X_SCALE_END] = pspec;
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g_object_class_install_property (gobject_class,
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PROP_X_SCALE_END,
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pspec);
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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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* Deprecated: 1.6
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*/
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pspec = g_param_spec_double ("y-scale-start",
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P_("Y Start Scale"),
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P_("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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obj_props[PROP_Y_SCALE_START] = pspec;
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g_object_class_install_property (gobject_class,
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PROP_Y_SCALE_START,
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pspec);
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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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* Deprecated: 1.6
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*/
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pspec = g_param_spec_double ("y-scale-end",
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P_("Y End Scale"),
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P_("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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obj_props[PROP_Y_SCALE_END] = pspec;
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g_object_class_install_property (gobject_class,
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PROP_Y_SCALE_END,
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pspec);
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behave_class->alpha_notify = clutter_behaviour_scale_alpha_notify;
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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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priv->x_scale_start = priv->x_scale_end = 1.0;
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priv->y_scale_start = priv->y_scale_end = 1.0;
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}
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/**
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* clutter_behaviour_scale_new:
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* @alpha: (allow-none): a #ClutterAlpha instance, or %NULL
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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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* Creates a new #ClutterBehaviourScale instance.
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*
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* If @alpha is not %NULL, the #ClutterBehaviour will take ownership
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* of the #ClutterAlpha instance. In the case when @alpha is %NULL,
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* it can be set later with clutter_behaviour_set_alpha().
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*
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* Return value: (transfer full): the newly created #ClutterBehaviourScale
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*
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* Since: 0.2
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*
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* Deprecated: 1.6
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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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{
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g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
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return g_object_new (CLUTTER_TYPE_BEHAVIOUR_SCALE,
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"alpha", alpha,
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"x-scale-start", x_scale_start,
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"y-scale-start", y_scale_start,
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"x-scale-end", x_scale_end,
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"y-scale-end", y_scale_end,
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NULL);
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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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* Deprecated: 1.6
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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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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->x_scale_start != x_scale_start)
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{
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priv->x_scale_start = x_scale_start;
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_clutter_notify_by_pspec (G_OBJECT (scale), obj_props[PROP_X_SCALE_START]);
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}
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if (priv->y_scale_start != y_scale_start)
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{
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priv->y_scale_start = y_scale_start;
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_clutter_notify_by_pspec (G_OBJECT (scale), obj_props[PROP_Y_SCALE_START]);
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}
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if (priv->x_scale_end != x_scale_end)
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{
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priv->x_scale_end = x_scale_end;
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_clutter_notify_by_pspec (G_OBJECT (scale), obj_props[PROP_X_SCALE_END]);
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}
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if (priv->y_scale_end != y_scale_end)
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{
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priv->y_scale_end = y_scale_end;
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_clutter_notify_by_pspec (G_OBJECT (scale), obj_props[PROP_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_bounds:
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* @scale: a #ClutterBehaviourScale
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* @x_scale_start: (out): return location for the initial scale factor on the X
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* axis, or %NULL
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* @y_scale_start: (out): return location for the initial scale factor on the Y
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* axis, or %NULL
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* @x_scale_end: (out): return location for the final scale factor on the X axis,
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* or %NULL
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* @y_scale_end: (out): 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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* Deprecated: 1.6
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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 = priv->x_scale_start;
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if (x_scale_end)
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*x_scale_end = priv->x_scale_end;
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if (y_scale_start)
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*y_scale_start = priv->y_scale_start;
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if (y_scale_end)
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*y_scale_end = priv->y_scale_end;
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}
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