736 lines
18 KiB
C
736 lines
18 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2007 Carlos Garnacho <carlos@imendio.com>
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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 Library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <gtk/gtktimeline.h>
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#include <gtk/gtktypebuiltins.h>
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#include <gtk/gtksettings.h>
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#include <math.h>
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#define MSECS_PER_SEC 1000
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#define FRAME_INTERVAL(nframes) (MSECS_PER_SEC / nframes)
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#define DEFAULT_FPS 30
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typedef struct GtkTimelinePriv GtkTimelinePriv;
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struct GtkTimelinePriv
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{
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guint duration;
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guint fps;
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guint source_id;
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GTimer *timer;
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gdouble progress;
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gdouble last_progress;
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GdkScreen *screen;
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GtkTimelineProgressType progress_type;
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guint animations_enabled : 1;
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guint loop : 1;
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guint direction : 1;
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};
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enum {
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PROP_0,
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PROP_FPS,
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PROP_DURATION,
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PROP_LOOP,
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PROP_DIRECTION,
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PROP_SCREEN
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};
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enum {
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STARTED,
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PAUSED,
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FINISHED,
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FRAME,
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LAST_SIGNAL
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};
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static guint signals [LAST_SIGNAL] = { 0, };
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static void gtk_timeline_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_timeline_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static void _gtk_timeline_finalize (GObject *object);
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G_DEFINE_TYPE (GtkTimeline, _gtk_timeline, G_TYPE_OBJECT)
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static void
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_gtk_timeline_class_init (GtkTimelineClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->set_property = gtk_timeline_set_property;
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object_class->get_property = gtk_timeline_get_property;
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object_class->finalize = _gtk_timeline_finalize;
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g_object_class_install_property (object_class,
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PROP_FPS,
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g_param_spec_uint ("fps",
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"FPS",
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"Frames per second for the timeline",
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1, G_MAXUINT,
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DEFAULT_FPS,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_DURATION,
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g_param_spec_uint ("duration",
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"Animation Duration",
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"Animation Duration",
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0, G_MAXUINT,
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0,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_LOOP,
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g_param_spec_boolean ("loop",
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"Loop",
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"Whether the timeline loops or not",
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FALSE,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_SCREEN,
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g_param_spec_object ("screen",
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"Screen",
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"Screen to get the settings from",
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GDK_TYPE_SCREEN,
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G_PARAM_READWRITE));
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signals[STARTED] =
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g_signal_new ("started",
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G_TYPE_FROM_CLASS (object_class),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GtkTimelineClass, started),
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NULL, NULL,
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g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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signals[PAUSED] =
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g_signal_new ("paused",
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G_TYPE_FROM_CLASS (object_class),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GtkTimelineClass, paused),
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NULL, NULL,
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g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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signals[FINISHED] =
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g_signal_new ("finished",
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G_TYPE_FROM_CLASS (object_class),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GtkTimelineClass, finished),
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NULL, NULL,
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g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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signals[FRAME] =
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g_signal_new ("frame",
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G_TYPE_FROM_CLASS (object_class),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GtkTimelineClass, frame),
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NULL, NULL,
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g_cclosure_marshal_VOID__DOUBLE,
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G_TYPE_NONE, 1,
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G_TYPE_DOUBLE);
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g_type_class_add_private (klass, sizeof (GtkTimelinePriv));
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}
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static void
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_gtk_timeline_init (GtkTimeline *timeline)
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{
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GtkTimelinePriv *priv;
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priv = timeline->priv = G_TYPE_INSTANCE_GET_PRIVATE (timeline,
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GTK_TYPE_TIMELINE,
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GtkTimelinePriv);
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priv->fps = DEFAULT_FPS;
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priv->duration = 0.0;
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priv->direction = GTK_TIMELINE_DIRECTION_FORWARD;
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priv->screen = gdk_screen_get_default ();
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priv->last_progress = 0;
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}
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static void
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gtk_timeline_set_property (GObject *object,
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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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GtkTimeline *timeline;
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GtkTimelinePriv *priv;
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timeline = GTK_TIMELINE (object);
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priv = timeline->priv;
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switch (prop_id)
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{
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case PROP_FPS:
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_gtk_timeline_set_fps (timeline, g_value_get_uint (value));
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break;
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case PROP_DURATION:
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_gtk_timeline_set_duration (timeline, g_value_get_uint (value));
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break;
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case PROP_LOOP:
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_gtk_timeline_set_loop (timeline, g_value_get_boolean (value));
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break;
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case PROP_DIRECTION:
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_gtk_timeline_set_direction (timeline, g_value_get_enum (value));
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break;
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case PROP_SCREEN:
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_gtk_timeline_set_screen (timeline,
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GDK_SCREEN (g_value_get_object (value)));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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gtk_timeline_get_property (GObject *object,
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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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GtkTimeline *timeline;
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GtkTimelinePriv *priv;
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timeline = GTK_TIMELINE (object);
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priv = timeline->priv;
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switch (prop_id)
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{
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case PROP_FPS:
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g_value_set_uint (value, priv->fps);
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break;
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case PROP_DURATION:
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g_value_set_uint (value, priv->duration);
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break;
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case PROP_LOOP:
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g_value_set_boolean (value, priv->loop);
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break;
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case PROP_DIRECTION:
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g_value_set_enum (value, priv->direction);
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break;
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case PROP_SCREEN:
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g_value_set_object (value, priv->screen);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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_gtk_timeline_finalize (GObject *object)
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{
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GtkTimelinePriv *priv;
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GtkTimeline *timeline;
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timeline = (GtkTimeline *) object;
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priv = timeline->priv;
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if (priv->source_id)
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{
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g_source_remove (priv->source_id);
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priv->source_id = 0;
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}
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if (priv->timer)
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g_timer_destroy (priv->timer);
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G_OBJECT_CLASS (_gtk_timeline_parent_class)->finalize (object);
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}
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static gdouble
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calculate_progress (gdouble linear_progress,
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GtkTimelineProgressType progress_type)
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{
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gdouble progress;
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progress = linear_progress;
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switch (progress_type)
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{
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case GTK_TIMELINE_PROGRESS_LINEAR:
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break;
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case GTK_TIMELINE_PROGRESS_EASE_IN_OUT:
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progress *= 2;
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if (progress < 1)
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progress = pow (progress, 3) / 2;
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else
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progress = (pow (progress - 2, 3) + 2) / 2;
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break;
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case GTK_TIMELINE_PROGRESS_EASE:
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progress = (sin ((progress - 0.5) * G_PI) + 1) / 2;
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break;
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case GTK_TIMELINE_PROGRESS_EASE_IN:
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progress = pow (progress, 3);
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break;
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case GTK_TIMELINE_PROGRESS_EASE_OUT:
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progress = pow (progress - 1, 3) + 1;
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break;
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default:
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g_warning ("Timeline progress type not implemented");
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}
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return progress;
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}
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static gboolean
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gtk_timeline_run_frame (GtkTimeline *timeline)
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{
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GtkTimelinePriv *priv;
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gdouble delta_progress, progress;
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guint elapsed_time;
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priv = timeline->priv;
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elapsed_time = (guint) (g_timer_elapsed (priv->timer, NULL) * 1000);
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g_timer_start (priv->timer);
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if (priv->animations_enabled)
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{
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delta_progress = (gdouble) elapsed_time / priv->duration;
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progress = priv->last_progress;
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if (priv->direction == GTK_TIMELINE_DIRECTION_BACKWARD)
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progress -= delta_progress;
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else
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progress += delta_progress;
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priv->last_progress = progress;
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progress = CLAMP (progress, 0., 1.);
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}
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else
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progress = (priv->direction == GTK_TIMELINE_DIRECTION_FORWARD) ? 1.0 : 0.0;
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priv->progress = progress;
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g_signal_emit (timeline, signals [FRAME], 0,
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calculate_progress (progress, priv->progress_type));
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if ((priv->direction == GTK_TIMELINE_DIRECTION_FORWARD && progress == 1.0) ||
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(priv->direction == GTK_TIMELINE_DIRECTION_BACKWARD && progress == 0.0))
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{
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if (!priv->loop)
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{
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if (priv->source_id)
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{
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g_source_remove (priv->source_id);
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priv->source_id = 0;
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}
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g_timer_stop (priv->timer);
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g_signal_emit (timeline, signals [FINISHED], 0);
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return FALSE;
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}
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else
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_gtk_timeline_rewind (timeline);
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}
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return TRUE;
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}
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/**
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* gtk_timeline_new:
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* @duration: duration in milliseconds for the timeline
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*
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* Creates a new #GtkTimeline with the specified number of frames.
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*
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* Return Value: the newly created #GtkTimeline
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**/
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GtkTimeline *
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_gtk_timeline_new (guint duration)
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{
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return g_object_new (GTK_TYPE_TIMELINE,
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"duration", duration,
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NULL);
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}
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GtkTimeline *
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_gtk_timeline_new_for_screen (guint duration,
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GdkScreen *screen)
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{
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return g_object_new (GTK_TYPE_TIMELINE,
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"duration", duration,
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"screen", screen,
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NULL);
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}
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/**
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* gtk_timeline_start:
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* @timeline: A #GtkTimeline
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*
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* Runs the timeline from the current frame.
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**/
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void
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_gtk_timeline_start (GtkTimeline *timeline)
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{
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GtkTimelinePriv *priv;
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GtkSettings *settings;
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gboolean enable_animations = FALSE;
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g_return_if_fail (GTK_IS_TIMELINE (timeline));
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priv = timeline->priv;
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if (!priv->source_id)
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{
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if (priv->timer)
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g_timer_continue (priv->timer);
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else
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priv->timer = g_timer_new ();
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/* sanity check */
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g_assert (priv->fps > 0);
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if (priv->screen)
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{
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settings = gtk_settings_get_for_screen (priv->screen);
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g_object_get (settings, "gtk-enable-animations", &enable_animations, NULL);
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}
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priv->animations_enabled = (enable_animations == TRUE);
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g_signal_emit (timeline, signals [STARTED], 0);
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if (enable_animations)
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priv->source_id = gdk_threads_add_timeout (FRAME_INTERVAL (priv->fps),
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(GSourceFunc) gtk_timeline_run_frame,
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timeline);
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else
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priv->source_id = gdk_threads_add_idle ((GSourceFunc) gtk_timeline_run_frame,
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timeline);
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}
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}
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/**
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* gtk_timeline_pause:
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* @timeline: A #GtkTimeline
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*
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* Pauses the timeline.
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**/
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void
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_gtk_timeline_pause (GtkTimeline *timeline)
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{
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GtkTimelinePriv *priv;
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g_return_if_fail (GTK_IS_TIMELINE (timeline));
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priv = timeline->priv;
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if (priv->source_id)
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{
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g_timer_stop (priv->timer);
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g_source_remove (priv->source_id);
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priv->source_id = 0;
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g_signal_emit (timeline, signals [PAUSED], 0);
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}
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}
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/**
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* gtk_timeline_rewind:
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* @timeline: A #GtkTimeline
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*
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* Rewinds the timeline.
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**/
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void
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_gtk_timeline_rewind (GtkTimeline *timeline)
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{
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GtkTimelinePriv *priv;
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g_return_if_fail (GTK_IS_TIMELINE (timeline));
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priv = timeline->priv;
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if (_gtk_timeline_get_direction (timeline) != GTK_TIMELINE_DIRECTION_FORWARD)
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priv->progress = priv->last_progress = 1.;
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else
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priv->progress = priv->last_progress = 0.;
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/* reset timer */
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if (priv->timer)
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{
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g_timer_start (priv->timer);
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if (!priv->source_id)
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g_timer_stop (priv->timer);
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}
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}
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|
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/**
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* gtk_timeline_is_running:
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* @timeline: A #GtkTimeline
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*
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* Returns whether the timeline is running or not.
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*
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* Return Value: %TRUE if the timeline is running
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**/
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gboolean
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_gtk_timeline_is_running (GtkTimeline *timeline)
|
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{
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GtkTimelinePriv *priv;
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g_return_val_if_fail (GTK_IS_TIMELINE (timeline), FALSE);
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priv = timeline->priv;
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return (priv->source_id != 0);
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}
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|
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/**
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* gtk_timeline_get_fps:
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* @timeline: A #GtkTimeline
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*
|
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* Returns the number of frames per second.
|
|
*
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* Return Value: frames per second
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**/
|
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guint
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_gtk_timeline_get_fps (GtkTimeline *timeline)
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{
|
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GtkTimelinePriv *priv;
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g_return_val_if_fail (GTK_IS_TIMELINE (timeline), 1);
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priv = timeline->priv;
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return priv->fps;
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}
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|
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/**
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|
* gtk_timeline_set_fps:
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* @timeline: A #GtkTimeline
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* @fps: frames per second
|
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*
|
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* Sets the number of frames per second that
|
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* the timeline will play.
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**/
|
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void
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_gtk_timeline_set_fps (GtkTimeline *timeline,
|
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guint fps)
|
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{
|
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GtkTimelinePriv *priv;
|
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|
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g_return_if_fail (GTK_IS_TIMELINE (timeline));
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g_return_if_fail (fps > 0);
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|
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priv = timeline->priv;
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|
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priv->fps = fps;
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|
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if (_gtk_timeline_is_running (timeline))
|
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{
|
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g_source_remove (priv->source_id);
|
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priv->source_id = gdk_threads_add_timeout (FRAME_INTERVAL (priv->fps),
|
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(GSourceFunc) gtk_timeline_run_frame,
|
|
timeline);
|
|
}
|
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|
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g_object_notify (G_OBJECT (timeline), "fps");
|
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}
|
|
|
|
/**
|
|
* gtk_timeline_get_loop:
|
|
* @timeline: A #GtkTimeline
|
|
*
|
|
* Returns whether the timeline loops to the
|
|
* beginning when it has reached the end.
|
|
*
|
|
* Return Value: %TRUE if the timeline loops
|
|
**/
|
|
gboolean
|
|
_gtk_timeline_get_loop (GtkTimeline *timeline)
|
|
{
|
|
GtkTimelinePriv *priv;
|
|
|
|
g_return_val_if_fail (GTK_IS_TIMELINE (timeline), FALSE);
|
|
|
|
priv = timeline->priv;
|
|
return priv->loop;
|
|
}
|
|
|
|
/**
|
|
* gtk_timeline_set_loop:
|
|
* @timeline: A #GtkTimeline
|
|
* @loop: %TRUE to make the timeline loop
|
|
*
|
|
* Sets whether the timeline loops to the beginning
|
|
* when it has reached the end.
|
|
**/
|
|
void
|
|
_gtk_timeline_set_loop (GtkTimeline *timeline,
|
|
gboolean loop)
|
|
{
|
|
GtkTimelinePriv *priv;
|
|
|
|
g_return_if_fail (GTK_IS_TIMELINE (timeline));
|
|
|
|
priv = timeline->priv;
|
|
|
|
if (loop != priv->loop)
|
|
{
|
|
priv->loop = loop;
|
|
g_object_notify (G_OBJECT (timeline), "loop");
|
|
}
|
|
}
|
|
|
|
void
|
|
_gtk_timeline_set_duration (GtkTimeline *timeline,
|
|
guint duration)
|
|
{
|
|
GtkTimelinePriv *priv;
|
|
|
|
g_return_if_fail (GTK_IS_TIMELINE (timeline));
|
|
|
|
priv = timeline->priv;
|
|
|
|
if (duration != priv->duration)
|
|
{
|
|
priv->duration = duration;
|
|
g_object_notify (G_OBJECT (timeline), "duration");
|
|
}
|
|
}
|
|
|
|
guint
|
|
_gtk_timeline_get_duration (GtkTimeline *timeline)
|
|
{
|
|
GtkTimelinePriv *priv;
|
|
|
|
g_return_val_if_fail (GTK_IS_TIMELINE (timeline), 0);
|
|
|
|
priv = timeline->priv;
|
|
|
|
return priv->duration;
|
|
}
|
|
|
|
/**
|
|
* gtk_timeline_set_direction:
|
|
* @timeline: A #GtkTimeline
|
|
* @direction: direction
|
|
*
|
|
* Sets the direction of the timeline.
|
|
**/
|
|
void
|
|
_gtk_timeline_set_direction (GtkTimeline *timeline,
|
|
GtkTimelineDirection direction)
|
|
{
|
|
GtkTimelinePriv *priv;
|
|
|
|
g_return_if_fail (GTK_IS_TIMELINE (timeline));
|
|
|
|
priv = timeline->priv;
|
|
priv->direction = direction;
|
|
}
|
|
|
|
/**
|
|
* gtk_timeline_get_direction:
|
|
* @timeline: A #GtkTimeline
|
|
*
|
|
* Returns the direction of the timeline.
|
|
*
|
|
* Return Value: direction
|
|
**/
|
|
GtkTimelineDirection
|
|
_gtk_timeline_get_direction (GtkTimeline *timeline)
|
|
{
|
|
GtkTimelinePriv *priv;
|
|
|
|
g_return_val_if_fail (GTK_IS_TIMELINE (timeline), GTK_TIMELINE_DIRECTION_FORWARD);
|
|
|
|
priv = timeline->priv;
|
|
return priv->direction;
|
|
}
|
|
|
|
void
|
|
_gtk_timeline_set_screen (GtkTimeline *timeline,
|
|
GdkScreen *screen)
|
|
{
|
|
GtkTimelinePriv *priv;
|
|
|
|
g_return_if_fail (GTK_IS_TIMELINE (timeline));
|
|
g_return_if_fail (GDK_IS_SCREEN (screen));
|
|
|
|
priv = timeline->priv;
|
|
|
|
if (priv->screen)
|
|
g_object_unref (priv->screen);
|
|
|
|
priv->screen = g_object_ref (screen);
|
|
|
|
g_object_notify (G_OBJECT (timeline), "screen");
|
|
}
|
|
|
|
GdkScreen *
|
|
_gtk_timeline_get_screen (GtkTimeline *timeline)
|
|
{
|
|
GtkTimelinePriv *priv;
|
|
|
|
g_return_val_if_fail (GTK_IS_TIMELINE (timeline), NULL);
|
|
|
|
priv = timeline->priv;
|
|
return priv->screen;
|
|
}
|
|
|
|
gdouble
|
|
_gtk_timeline_get_progress (GtkTimeline *timeline)
|
|
{
|
|
GtkTimelinePriv *priv;
|
|
|
|
g_return_val_if_fail (GTK_IS_TIMELINE (timeline), 0.);
|
|
|
|
priv = timeline->priv;
|
|
return calculate_progress (priv->progress, priv->progress_type);
|
|
}
|
|
|
|
GtkTimelineProgressType
|
|
_gtk_timeline_get_progress_type (GtkTimeline *timeline)
|
|
{
|
|
GtkTimelinePriv *priv;
|
|
|
|
g_return_val_if_fail (GTK_IS_TIMELINE (timeline), GTK_TIMELINE_PROGRESS_LINEAR);
|
|
|
|
priv = timeline->priv;
|
|
return priv->progress_type;
|
|
}
|
|
|
|
void
|
|
_gtk_timeline_set_progress_type (GtkTimeline *timeline,
|
|
GtkTimelineProgressType progress_type)
|
|
{
|
|
GtkTimelinePriv *priv;
|
|
|
|
g_return_if_fail (GTK_IS_TIMELINE (timeline));
|
|
|
|
priv = timeline->priv;
|
|
priv->progress_type = progress_type;
|
|
}
|