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stylecontext: Add new class for animation handling

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A StyleAnimation is an immutable object used to track the state of CSS
values. I'd have liked to make it fully immutable - ie not have the
timestamp in there - but couldn't find a place to sanely store the
timestamp.

This is an abstract base class. Implementations for this will be added
later (for both CSS3 transitions and animations, potentially for
animated images).

Actually aplying the information in this object will be done by a
different object commtted later.
This commit is contained in:
Benjamin Otte 2012-04-11 16:00:57 +02:00
parent 8b1385804e
commit 7b7027c971
3 changed files with 151 additions and 0 deletions
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2
gtk/Makefile.am
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@ -508,6 +508,7 @@ gtk_private_h_sources = \
gtksettingsprivate.h \
gtksizegroup-private.h \
gtksocketprivate.h \
gtkstyleanimationprivate.h \
gtkstylecascadeprivate.h \
gtkstylecontextprivate.h \
gtkstylepropertiesprivate.h \
@ -791,6 +792,7 @@ gtk_base_c_sources = \
gtkstatusbar.c \
gtkstatusicon.c \
gtkstock.c \
gtkstyleanimation.c \
gtkstylecascade.c \
gtkstylecontext.c \
gtkstyleproperties.c \

82
gtk/gtkstyleanimation.c Normal file
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@ -0,0 +1,82 @@
/*
* Copyright © 2012 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gtkstyleanimationprivate.h"
G_DEFINE_ABSTRACT_TYPE (GtkStyleAnimation, _gtk_style_animation, G_TYPE_OBJECT)
static GtkBitmask *
gtk_style_animation_real_set_values (GtkStyleAnimation *animation,
GtkBitmask *changed,
gint64 for_time_us,
GtkCssComputedValues *values)
{
return changed;
}
static gboolean
gtk_style_animation_real_is_finished (GtkStyleAnimation *animation,
gint64 at_time_us)
{
return TRUE;
}
static void
_gtk_style_animation_class_init (GtkStyleAnimationClass *klass)
{
klass->set_values = gtk_style_animation_real_set_values;
klass->is_finished = gtk_style_animation_real_is_finished;
}
static void
_gtk_style_animation_init (GtkStyleAnimation *animation)
{
}
GtkBitmask *
_gtk_style_animation_set_values (GtkStyleAnimation *animation,
GtkBitmask *changed,
gint64 for_time_us,
GtkCssComputedValues *values)
{
GtkStyleAnimationClass *klass;
g_return_val_if_fail (GTK_IS_STYLE_ANIMATION (animation), changed);
g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (values), changed);
klass = GTK_STYLE_ANIMATION_GET_CLASS (animation);
return klass->set_values (animation, changed, for_time_us, values);
}
gboolean
_gtk_style_animation_is_finished (GtkStyleAnimation *animation,
gint64 at_time_us)
{
GtkStyleAnimationClass *klass;
g_return_val_if_fail (GTK_IS_STYLE_ANIMATION (animation), TRUE);
klass = GTK_STYLE_ANIMATION_GET_CLASS (animation);
return klass->is_finished (animation, at_time_us);
}

67
gtk/gtkstyleanimationprivate.h Normal file
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@ -0,0 +1,67 @@
/*
* Copyright © 2012 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#ifndef __GTK_STYLE_ANIMATION_PRIVATE_H__
#define __GTK_STYLE_ANIMATION_PRIVATE_H__
#include <glib-object.h>
#include "gtkcsscomputedvaluesprivate.h"
G_BEGIN_DECLS
#define GTK_TYPE_STYLE_ANIMATION (_gtk_style_animation_get_type ())
#define GTK_STYLE_ANIMATION(obj) (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_STYLE_ANIMATION, GtkStyleAnimation))
#define GTK_STYLE_ANIMATION_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_STYLE_ANIMATION, GtkStyleAnimationClass))
#define GTK_IS_STYLE_ANIMATION(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_STYLE_ANIMATION))
#define GTK_IS_STYLE_ANIMATION_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_STYLE_ANIMATION))
#define GTK_STYLE_ANIMATION_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_STYLE_ANIMATION, GtkStyleAnimationClass))
typedef struct _GtkStyleAnimation GtkStyleAnimation;
typedef struct _GtkStyleAnimationClass GtkStyleAnimationClass;
struct _GtkStyleAnimation
{
GObject parent;
};
struct _GtkStyleAnimationClass
{
GObjectClass parent_class;
gboolean (* is_finished) (GtkStyleAnimation *animation,
gint64 at_time_us);
GtkBitmask * (* set_values) (GtkStyleAnimation *animation,
GtkBitmask *changed,
gint64 for_time_us,
GtkCssComputedValues *values);
};
GType _gtk_style_animation_get_type (void) G_GNUC_CONST;
GtkBitmask * _gtk_style_animation_set_values (GtkStyleAnimation *animation,
GtkBitmask *changed,
gint64 for_time_us,
GtkCssComputedValues *values) G_GNUC_WARN_UNUSED_RESULT;
gboolean _gtk_style_animation_is_finished (GtkStyleAnimation *animation,
gint64 at_time_us);
G_END_DECLS
#endif /* __GTK_STYLE_ANIMATION_PRIVATE_H__ */