shell/ev-presentation-timer.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /* this file is part of evince, a gnome document viewer
   3  *
   4  *
   5  *  Author:
   6  *    Lukas Bezdicka <255993@mail.muni.cz>
   7  *
   8  * Evince is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * Evince is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include <cairo.h>
  28 #include <glib/gi18n.h>
  29 #include <gtk/gtk.h>
  30 #include <math.h>
  31
  32 #include "ev-presentation-timer.h"
  33
  34 struct _EvPresentationTimerPrivate
  35 {
  36         gint       time;
  37         gint       remaining;
  38         guint      page;
  39         guint      pages;
  40         guint      timeout;
  41         gboolean   running;
  42 };
  43
  44 #define EV_PRESENTATION_TIMER_GET_PRIVATE(object) \
  45         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_PRESENTATION_TIMER, EvPresentationTimerPrivate))
  46
  47 G_DEFINE_TYPE (EvPresentationTimer, ev_presentation_timer, GTK_TYPE_DRAWING_AREA);
  48
  49 static gdouble
  50 ev_presentation_timer_progress (gdouble time, gdouble remaining)
  51 {
  52         return remaining/(time*60);
  53 }
  54
  55 static gboolean
  56 ev_presentation_timer_draw(GtkWidget *timer, cairo_t *cr)
  57 {
  58         EvPresentationTimer *ev_timer = EV_PRESENTATION_TIMER(timer);
  59         GtkAllocation allocation;
  60         gtk_widget_get_allocation (timer, &allocation);
  61         cairo_set_source_rgb (cr, 0, 0, 0);
  62         cairo_set_line_width (cr, 5);
  63         guint pos = (allocation.width/ev_timer->priv->pages)*ev_timer->priv->page;
  64         cairo_move_to (cr,pos,2);
  65         cairo_line_to (cr,pos,allocation.height);
  66         cairo_stroke (cr);
  67         if(ev_timer->priv->running && ev_timer->priv->time > 0 && ev_timer->priv->remaining > 0)
  68         {
  69                 gdouble progress = ev_presentation_timer_progress (ev_timer->priv->time,
  70                                                                    ev_timer->priv->remaining)*(allocation.width);
  71                 cairo_rectangle (cr, allocation.width-progress,
  72                                  10,
  73                                  (allocation.width-(allocation.width-progress))-10,
  74                                  allocation.height-5);
  75                 cairo_stroke_preserve (cr);
  76                 cairo_fill(cr);
  77         }
  78         return FALSE;
  79 }
  80
  81 static gboolean
  82 timeout_cb (gpointer data)
  83 {
  84         EvPresentationTimer *ev_timer = EV_PRESENTATION_TIMER(data);
  85         ev_timer->priv->remaining--;
  86
  87         if(time >= 0 && ev_timer->priv->remaining >= 0)
  88         {
  89                 gtk_widget_queue_draw(GTK_WIDGET(ev_timer));
  90         } else
  91                 ev_timer->priv->running = FALSE;
  92         return ev_timer->priv->running;
  93 }
  94
  95 void
  96 ev_presentation_timer_set_pages (EvPresentationTimer *ev_timer, guint pages)
  97 {
  98         if(!EV_IS_PRESENTATION_TIMER (ev_timer))
  99                 return;
 100         ev_timer->priv->pages = pages -1;
 101 }
 102
 103 void
 104 ev_presentation_timer_set_page (EvPresentationTimer *ev_timer, guint page)
 105 {
 106         if(!EV_IS_PRESENTATION_TIMER (ev_timer))
 107                 return;
 108         if (page >= ev_timer->priv->pages)
 109         {
 110                 page = ev_timer->priv->pages;
 111                 ev_timer->priv->running=FALSE;
 112         }
 113         ev_timer->priv->page = page;
 114         gtk_widget_queue_draw(GTK_WIDGET(ev_timer));
 115 }
 116
 117 static void
 118 ev_presentation_timer_init (EvPresentationTimer *ev_timer)
 119 {
 120         ev_timer->priv = EV_PRESENTATION_TIMER_GET_PRIVATE (ev_timer);
 121         ev_timer->priv->page = 0;
 122         ev_timer->priv->pages = 0;
 123         ev_timer->priv->remaining = 0;
 124         ev_timer->priv->time = 0;
 125         ev_timer->priv->timeout = 0;
 126         ev_timer->priv->running = FALSE;
 127 }
 128
 129 void
 130 ev_presentation_timer_start (EvPresentationTimer *ev_timer)
 131 {
 132         if (!EV_IS_PRESENTATION_TIMER (ev_timer))
 133                 return;
 134         if (ev_timer->priv->running == FALSE)
 135         {
 136                 ev_timer->priv->remaining = (ev_timer->priv->time)*60;
 137                 ev_timer->priv->running = TRUE;
 138                 ev_timer->priv->timeout = g_timeout_add_seconds (1, timeout_cb, ev_timer);
 139         }
 140 }
 141
 142 void
 143 ev_presentation_timer_stop (EvPresentationTimer *ev_timer)
 144 {
 145         if (!EV_IS_PRESENTATION_TIMER (ev_timer))
 146                 return;
 147         if (ev_timer->priv->timeout > 0)
 148                 g_source_remove (ev_timer->priv->timeout);
 149         ev_timer->priv->remaining = 0;
 150 }
 151
 152 void
 153 ev_presentation_timer_set_time (EvPresentationTimer *ev_timer,
 154                                 gint time)
 155 {
 156         if (!EV_IS_PRESENTATION_TIMER (ev_timer))
 157                 return;
 158         if(ev_timer->priv->running)
 159                 ev_timer->priv->remaining = ((ev_timer->priv->remaining)/(ev_timer->priv->time)*time);
 160         ev_timer->priv->time = (time < -1)? -1:time;
 161 }
 162
 163 static void
 164 ev_presentation_timer_dispose (GObject *gobject)
 165 {
 166         EvPresentationTimer *ev_timer = EV_PRESENTATION_TIMER (gobject);
 167         EvPresentationTimerPrivate *priv = EV_PRESENTATION_TIMER (ev_timer)->priv;
 168         if (priv->timeout > 0)
 169                 g_source_remove (priv->timeout);
 170         G_OBJECT_CLASS (ev_presentation_timer_parent_class)->dispose (gobject);
 171 }
 172
 173 static void
 174 ev_presentation_timer_class_init (EvPresentationTimerClass *klass)
 175 {
 176         GObjectClass    *object_class = G_OBJECT_CLASS (klass);
 177         GtkWidgetClass  *widget_class = GTK_WIDGET_CLASS (klass);
 178         g_type_class_add_private (object_class, sizeof (EvPresentationTimerPrivate));
 179         widget_class->draw = ev_presentation_timer_draw;
 180         object_class->dispose =  ev_presentation_timer_dispose;
 181 }
 182
 183 GtkWidget *
 184 ev_presentation_timer_new (void)
 185 {
 186         EvPresentationTimer     *ev_timer;
 187
 188         ev_timer = g_object_new (EV_TYPE_PRESENTATION_TIMER, NULL);
 189         return GTK_WIDGET (ev_timer);
 190 }