[gtk+/wip/cssvalue: 159/165] animation: Add CSS transition object
- From: Benjamin Otte <otte src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk+/wip/cssvalue: 159/165] animation: Add CSS transition object
- Date: Fri, 13 Apr 2012 23:16:08 +0000 (UTC)
commit cc658a99e919b9886baca8717d519bb32cd3a60c
Author: Benjamin Otte <otte redhat com>
Date: Wed Apr 11 16:04:46 2012 +0200
animation: Add CSS transition object
This is an implementation of GtkStyleAnimation for CSS transitions.
Again, this doesn't do anything but store the data needed to do the
transition.
gtk/Makefile.am | 2 +
gtk/gtkcsstransition.c | 131 +++++++++++++++++++++++++++++++++++++++++
gtk/gtkcsstransitionprivate.h | 67 +++++++++++++++++++++
3 files changed, 200 insertions(+), 0 deletions(-)
---
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index f8e4c32..c5a2faa 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -456,6 +456,7 @@ gtk_private_h_sources = \
gtkcssstringvalueprivate.h \
gtkcssstylefuncsprivate.h \
gtkcssstylepropertyprivate.h \
+ gtkcsstransitionprivate.h \
gtkcsstypedvalueprivate.h \
gtkcssvalueprivate.h \
gtkcustompaperunixdialog.h \
@@ -672,6 +673,7 @@ gtk_base_c_sources = \
gtkcssstylefuncs.c \
gtkcssstyleproperty.c \
gtkcssstylepropertyimpl.c \
+ gtkcsstransition.c \
gtkcsstypedvalue.c \
gtkcssvalue.c \
gtkcsstypes.c \
diff --git a/gtk/gtkcsstransition.c b/gtk/gtkcsstransition.c
new file mode 100644
index 0000000..79b803d
--- /dev/null
+++ b/gtk/gtkcsstransition.c
@@ -0,0 +1,131 @@
+/*
+ * 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 "gtkcsstransitionprivate.h"
+
+#include "gtkcsseasevalueprivate.h"
+
+G_DEFINE_TYPE (GtkCssTransition, _gtk_css_transition, GTK_TYPE_STYLE_ANIMATION)
+
+static GtkBitmask *
+gtk_css_transition_set_values (GtkStyleAnimation *animation,
+ GtkBitmask *changed,
+ gint64 for_time_us,
+ GtkCssComputedValues *values)
+{
+ GtkCssTransition *transition = GTK_CSS_TRANSITION (animation);
+ GtkCssValue *value;
+ double progress;
+
+ if (transition->start_time >= for_time_us)
+ value = _gtk_css_value_ref (transition->start);
+ else if (transition->end_time <= for_time_us)
+ value = _gtk_css_value_ref (transition->end);
+ else
+ {
+ progress = (double) (for_time_us - transition->start_time) / (transition->end_time - transition->start_time);
+ progress = _gtk_css_ease_value_transform (transition->ease, progress);
+
+ value = _gtk_css_value_transition (transition->start,
+ transition->end,
+ progress);
+ if (value == NULL)
+ value = _gtk_css_value_ref (transition->end);
+ }
+
+ _gtk_css_computed_values_set_value (values, transition->property, value, NULL);
+ _gtk_css_value_unref (value);
+
+ return _gtk_bitmask_set (changed, transition->property, TRUE);
+}
+
+static gboolean
+gtk_css_transition_is_finished (GtkStyleAnimation *animation,
+ gint64 at_time_us)
+{
+ GtkCssTransition *transition = GTK_CSS_TRANSITION (animation);
+
+ return at_time_us >= transition->end_time;
+}
+
+static void
+gtk_css_transition_finalize (GObject *object)
+{
+ GtkCssTransition *transition = GTK_CSS_TRANSITION (object);
+
+ _gtk_css_value_unref (transition->start);
+ _gtk_css_value_unref (transition->end);
+ _gtk_css_value_unref (transition->ease);
+
+ G_OBJECT_CLASS (_gtk_css_transition_parent_class)->finalize (object);
+}
+
+static void
+_gtk_css_transition_class_init (GtkCssTransitionClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GtkStyleAnimationClass *animation_class = GTK_STYLE_ANIMATION_CLASS (klass);
+
+ object_class->finalize = gtk_css_transition_finalize;
+
+ animation_class->set_values = gtk_css_transition_set_values;
+ animation_class->is_finished = gtk_css_transition_is_finished;
+}
+
+static void
+_gtk_css_transition_init (GtkCssTransition *transition)
+{
+}
+
+GtkStyleAnimation *
+_gtk_css_transition_new (guint property,
+ GtkCssValue *start,
+ GtkCssValue *end,
+ GtkCssValue *ease,
+ gint64 start_time_us,
+ gint64 end_time_us)
+{
+ GtkCssTransition *transition;
+
+ g_return_val_if_fail (start != NULL, NULL);
+ g_return_val_if_fail (end != NULL, NULL);
+ g_return_val_if_fail (ease != NULL, NULL);
+ g_return_val_if_fail (start_time_us <= end_time_us, NULL);
+
+ transition = g_object_new (GTK_TYPE_CSS_TRANSITION, NULL);
+
+ transition->property = property;
+ transition->start = _gtk_css_value_ref (start);
+ transition->end = _gtk_css_value_ref (end);
+ transition->ease = _gtk_css_value_ref (ease);
+ transition->start_time = start_time_us;
+ transition->end_time = end_time_us;
+
+ return GTK_STYLE_ANIMATION (transition);
+}
+
+guint
+_gtk_css_transition_get_property (GtkCssTransition *transition)
+{
+ g_return_val_if_fail (GTK_IS_CSS_TRANSITION (transition), 0);
+
+ return transition->property;
+}
diff --git a/gtk/gtkcsstransitionprivate.h b/gtk/gtkcsstransitionprivate.h
new file mode 100644
index 0000000..c8af3fc
--- /dev/null
+++ b/gtk/gtkcsstransitionprivate.h
@@ -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_CSS_TRANSITION_PRIVATE_H__
+#define __GTK_CSS_TRANSITION_PRIVATE_H__
+
+#include "gtkstyleanimationprivate.h"
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_CSS_TRANSITION (_gtk_css_transition_get_type ())
+#define GTK_CSS_TRANSITION(obj) (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_TRANSITION, GtkCssTransition))
+#define GTK_CSS_TRANSITION_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_TRANSITION, GtkCssTransitionClass))
+#define GTK_IS_CSS_TRANSITION(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_TRANSITION))
+#define GTK_IS_CSS_TRANSITION_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_TRANSITION))
+#define GTK_CSS_TRANSITION_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_TRANSITION, GtkCssTransitionClass))
+
+typedef struct _GtkCssTransition GtkCssTransition;
+typedef struct _GtkCssTransitionClass GtkCssTransitionClass;
+
+struct _GtkCssTransition
+{
+ GtkStyleAnimation parent;
+
+ guint property;
+ GtkCssValue *start;
+ GtkCssValue *end;
+ GtkCssValue *ease;
+ gint64 start_time;
+ gint64 end_time;
+};
+
+struct _GtkCssTransitionClass
+{
+ GtkStyleAnimationClass parent_class;
+};
+
+GType _gtk_css_transition_get_type (void) G_GNUC_CONST;
+
+GtkStyleAnimation * _gtk_css_transition_new (guint property,
+ GtkCssValue *start,
+ GtkCssValue *end,
+ GtkCssValue *ease,
+ gint64 start_time_us,
+ gint64 end_time_us);
+
+guint _gtk_css_transition_get_property (GtkCssTransition *transition);
+
+G_END_DECLS
+
+#endif /* __GTK_CSS_TRANSITION_PRIVATE_H__ */
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