forked from AuroraMiddleware/gtk
133 lines
4.2 KiB
C
133 lines
4.2 KiB
C
/*
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* Copyright © 2012 Red Hat Inc.
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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 2.1 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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* Authors: Benjamin Otte <otte@gnome.org>
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*/
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#include "config.h"
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#include "gtkcsstransitionprivate.h"
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#include "gtkcsseasevalueprivate.h"
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G_DEFINE_TYPE (GtkCssTransition, _gtk_css_transition, GTK_TYPE_STYLE_ANIMATION)
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static GtkBitmask *
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gtk_css_transition_set_values (GtkStyleAnimation *animation,
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GtkBitmask *changed,
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gint64 for_time_us,
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GtkCssComputedValues *values)
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{
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GtkCssTransition *transition = GTK_CSS_TRANSITION (animation);
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GtkCssValue *value;
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double progress;
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if (transition->start_time >= for_time_us)
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value = _gtk_css_value_ref (transition->start);
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else if (transition->end_time <= for_time_us)
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value = _gtk_css_value_ref (transition->end);
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else
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{
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progress = (double) (for_time_us - transition->start_time) / (transition->end_time - transition->start_time);
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progress = _gtk_css_ease_value_transform (transition->ease, progress);
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value = _gtk_css_value_transition (transition->start,
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transition->end,
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progress);
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if (value == NULL)
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value = _gtk_css_value_ref (transition->end);
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}
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/* XXX: Is using 0 correct here? */
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_gtk_css_computed_values_set_value (values, transition->property, value, 0, NULL);
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_gtk_css_value_unref (value);
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return _gtk_bitmask_set (changed, transition->property, TRUE);
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}
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static gboolean
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gtk_css_transition_is_finished (GtkStyleAnimation *animation,
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gint64 at_time_us)
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{
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GtkCssTransition *transition = GTK_CSS_TRANSITION (animation);
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return at_time_us >= transition->end_time;
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}
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static void
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gtk_css_transition_finalize (GObject *object)
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{
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GtkCssTransition *transition = GTK_CSS_TRANSITION (object);
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_gtk_css_value_unref (transition->start);
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_gtk_css_value_unref (transition->end);
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_gtk_css_value_unref (transition->ease);
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G_OBJECT_CLASS (_gtk_css_transition_parent_class)->finalize (object);
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}
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static void
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_gtk_css_transition_class_init (GtkCssTransitionClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkStyleAnimationClass *animation_class = GTK_STYLE_ANIMATION_CLASS (klass);
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object_class->finalize = gtk_css_transition_finalize;
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animation_class->set_values = gtk_css_transition_set_values;
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animation_class->is_finished = gtk_css_transition_is_finished;
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}
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static void
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_gtk_css_transition_init (GtkCssTransition *transition)
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{
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}
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GtkStyleAnimation *
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_gtk_css_transition_new (guint property,
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GtkCssValue *start,
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GtkCssValue *end,
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GtkCssValue *ease,
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gint64 start_time_us,
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gint64 end_time_us)
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{
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GtkCssTransition *transition;
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g_return_val_if_fail (start != NULL, NULL);
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g_return_val_if_fail (end != NULL, NULL);
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g_return_val_if_fail (ease != NULL, NULL);
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g_return_val_if_fail (start_time_us <= end_time_us, NULL);
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transition = g_object_new (GTK_TYPE_CSS_TRANSITION, NULL);
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transition->property = property;
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transition->start = _gtk_css_value_ref (start);
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transition->end = _gtk_css_value_ref (end);
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transition->ease = _gtk_css_value_ref (ease);
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transition->start_time = start_time_us;
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transition->end_time = end_time_us;
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return GTK_STYLE_ANIMATION (transition);
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}
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guint
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_gtk_css_transition_get_property (GtkCssTransition *transition)
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{
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g_return_val_if_fail (GTK_IS_CSS_TRANSITION (transition), 0);
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return transition->property;
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}
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