8d51617979
This adds a wrapper macro to clutter-private that will use g_object_notify_by_pspec if it's compiled against a version of GLib that is sufficiently new. Otherwise it will notify by the property name as before by extracting the name from the pspec. The objects can then store a static array of GParamSpecs and notify using those as suggested in the documentation for g_object_notify_by_pspec. Note that the name of the variable used for storing the array of GParamSpecs is obj_props instead of properties as used in the documentation because some places in Clutter uses 'properties' as the name of a local variable. Mose of the classes in Clutter have been converted using the script in the bug report. Some classes have not been modified even though the script picked them up as described here: json-generator: We probably don't want to modify the internal copy of JSON behaviour-depth: rectangle: score: stage-manager: These aren't using the separate GParamSpec* variable style. blur-effect: win32/device-manager: Don't actually define any properties even though it has the enum. box-layout: flow-layout: Have some per-child properties that don't work automatically with the script. clutter-model: The script gets confused with ClutterModelIter stage: Script gets confused because PROP_USER_RESIZE doesn't match "user-resizable" test-layout: Don't really want to modify the tests http://bugzilla.clutter-project.org/show_bug.cgi?id=2150
310 lines
8.7 KiB
C
310 lines
8.7 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-opacity
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* @short_description: A behaviour controlling opacity
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*
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* #ClutterBehaviourPath interpolates actors opacity 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-behaviour-opacity.h"
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#include "clutter-enum-types.h"
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#include "clutter-main.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-opacity
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* @short_description: Behaviour controlling the opacity
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*
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* #ClutterBehaviourOpacity controls the opacity of a set of actors.
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*
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* Since: 0.2
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*/
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G_DEFINE_TYPE (ClutterBehaviourOpacity,
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clutter_behaviour_opacity,
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CLUTTER_TYPE_BEHAVIOUR);
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struct _ClutterBehaviourOpacityPrivate
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{
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guint8 opacity_start;
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guint8 opacity_end;
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};
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#define CLUTTER_BEHAVIOUR_OPACITY_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
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CLUTTER_TYPE_BEHAVIOUR_OPACITY, \
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ClutterBehaviourOpacityPrivate))
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enum
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{
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PROP_0,
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PROP_OPACITY_START,
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PROP_OPACITY_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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static void
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alpha_notify_foreach (ClutterBehaviour *behaviour,
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ClutterActor *actor,
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gpointer data)
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{
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clutter_actor_set_opacity (actor, GPOINTER_TO_UINT(data));
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}
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static void
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clutter_behaviour_alpha_notify (ClutterBehaviour *behave,
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gdouble alpha_value)
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{
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ClutterBehaviourOpacityPrivate *priv;
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guint8 opacity;
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priv = CLUTTER_BEHAVIOUR_OPACITY (behave)->priv;
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opacity = alpha_value
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* (priv->opacity_end - priv->opacity_start)
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+ priv->opacity_start;
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CLUTTER_NOTE (BEHAVIOUR, "alpha: %.4f, opacity: %u",
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alpha_value,
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opacity);
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clutter_behaviour_actors_foreach (behave,
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alpha_notify_foreach,
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GUINT_TO_POINTER ((guint) opacity));
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}
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static void
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clutter_behaviour_opacity_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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ClutterBehaviourOpacity *self = CLUTTER_BEHAVIOUR_OPACITY (gobject);
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switch (prop_id)
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{
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case PROP_OPACITY_START:
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clutter_behaviour_opacity_set_bounds (self,
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g_value_get_uint (value),
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self->priv->opacity_end);
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break;
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case PROP_OPACITY_END:
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clutter_behaviour_opacity_set_bounds (self,
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self->priv->opacity_start,
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g_value_get_uint (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_opacity_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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ClutterBehaviourOpacity *self = CLUTTER_BEHAVIOUR_OPACITY (gobject);
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switch (prop_id)
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{
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case PROP_OPACITY_START:
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g_value_set_uint (value, self->priv->opacity_start);
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break;
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case PROP_OPACITY_END:
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g_value_set_uint (value, self->priv->opacity_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_opacity_class_init (ClutterBehaviourOpacityClass *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;
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g_type_class_add_private (klass, sizeof (ClutterBehaviourOpacityPrivate));
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gobject_class->set_property = clutter_behaviour_opacity_set_property;
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gobject_class->get_property = clutter_behaviour_opacity_get_property;
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/**
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* ClutterBehaviourOpacity:opacity-start:
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*
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* Initial opacity level of the behaviour.
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*
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* Since: 0.2
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*/
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pspec = g_param_spec_uint ("opacity-start",
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P_("Opacity Start"),
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P_("Initial opacity level"),
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0, 255,
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0,
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CLUTTER_PARAM_READWRITE);
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obj_props[PROP_OPACITY_START] = pspec;
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g_object_class_install_property (gobject_class, PROP_OPACITY_START, pspec);
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/**
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* ClutterBehaviourOpacity:opacity-end:
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*
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* Final opacity level of the behaviour.
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*
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* Since: 0.2
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*/
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pspec = g_param_spec_uint ("opacity-end",
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P_("Opacity End"),
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P_("Final opacity level"),
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0, 255,
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0,
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CLUTTER_PARAM_READWRITE);
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obj_props[PROP_OPACITY_END] = pspec;
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g_object_class_install_property (gobject_class, PROP_OPACITY_END, pspec);
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behave_class->alpha_notify = clutter_behaviour_alpha_notify;
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}
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static void
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clutter_behaviour_opacity_init (ClutterBehaviourOpacity *self)
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{
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self->priv = CLUTTER_BEHAVIOUR_OPACITY_GET_PRIVATE (self);
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self->priv->opacity_start = 0;
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self->priv->opacity_end = 0;
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}
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/**
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* clutter_behaviour_opacity_new:
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* @alpha: a #ClutterAlpha instance, or %NULL
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* @opacity_start: minimum level of opacity
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* @opacity_end: maximum level of opacity
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*
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* Creates a new #ClutterBehaviourOpacity object, driven by @alpha
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* which controls the opacity property of every actor, making it
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* change in the interval between @opacity_start and @opacity_end.
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*
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* Return value: the newly created #ClutterBehaviourOpacity
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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_opacity_new (ClutterAlpha *alpha,
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guint8 opacity_start,
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guint8 opacity_end)
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{
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return g_object_new (CLUTTER_TYPE_BEHAVIOUR_OPACITY,
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"alpha", alpha,
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"opacity-start", opacity_start,
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"opacity-end", opacity_end,
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NULL);
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}
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/**
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* clutter_behaviour_opacity_set_bounds:
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* @behaviour: a #ClutterBehaviourOpacity
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* @opacity_start: minimum level of opacity
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* @opacity_end: maximum level of opacity
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*
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* Sets the initial and final levels of the opacity applied by @behaviour
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* on each actor it controls.
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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_opacity_set_bounds (ClutterBehaviourOpacity *behaviour,
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guint8 opacity_start,
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guint8 opacity_end)
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{
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ClutterBehaviourOpacityPrivate *priv;
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g_return_if_fail (CLUTTER_IS_BEHAVIOUR_OPACITY (behaviour));
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priv = behaviour->priv;
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g_object_freeze_notify (G_OBJECT (behaviour));
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if (priv->opacity_start != opacity_start)
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{
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priv->opacity_start = opacity_start;
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_clutter_notify_by_pspec (G_OBJECT (behaviour), obj_props[PROP_OPACITY_START]);
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}
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if (priv->opacity_end != opacity_end)
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{
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priv->opacity_end = opacity_end;
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_clutter_notify_by_pspec (G_OBJECT (behaviour), obj_props[PROP_OPACITY_END]);
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}
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g_object_thaw_notify (G_OBJECT (behaviour));
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}
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/**
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* clutter_behaviour_opacity_get_bounds:
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* @behaviour: a #ClutterBehaviourOpacity
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* @opacity_start: return location for the minimum level of opacity, or %NULL
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* @opacity_end: return location for the maximum level of opacity, or %NULL
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*
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* Gets the initial and final levels of the opacity applied by @behaviour
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* on each actor it controls.
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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_opacity_get_bounds (ClutterBehaviourOpacity *behaviour,
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guint8 *opacity_start,
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guint8 *opacity_end)
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{
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g_return_if_fail (CLUTTER_IS_BEHAVIOUR_OPACITY (behaviour));
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if (opacity_start)
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*opacity_start = behaviour->priv->opacity_start;
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if (opacity_end)
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*opacity_end = behaviour->priv->opacity_end;
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}
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