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         ev_timer->priv->pages = pages -1;
  99 }
 100
 101 void
 102 ev_presentation_timer_set_page (EvPresentationTimer *ev_timer, guint page)
 103 {
 104         if (page >= ev_timer->priv->pages)
 105         {
 106                 page = ev_timer->priv->pages;
 107                 ev_timer->priv->running=FALSE;
 108         }
 109         ev_timer->priv->page = page;
 110         gtk_widget_queue_draw(GTK_WIDGET(ev_timer));
 111 }
 112
 113 static void
 114 ev_presentation_timer_init (EvPresentationTimer *ev_timer)
 115 {
 116         ev_timer->priv = EV_PRESENTATION_TIMER_GET_PRIVATE (ev_timer);
 117         ev_timer->priv->page = 0;
 118         ev_timer->priv->pages = 0;
 119         ev_timer->priv->remaining = 0;
 120         ev_timer->priv->time = 0;
 121         ev_timer->priv->timeout = 0;
 122         ev_timer->priv->running = FALSE;
 123 }
 124
 125 void
 126 ev_presentation_timer_start (EvPresentationTimer *ev_timer)
 127 {
 128         if (ev_timer->priv->running == FALSE)
 129         {
 130                 ev_timer->priv->remaining = (ev_timer->priv->time)*60;
 131                 ev_timer->priv->running = TRUE;
 132                 ev_timer->priv->timeout = g_timeout_add_seconds (1, timeout_cb, ev_timer);
 133         }
 134 }
 135
 136 void
 137 ev_presentation_timer_stop (EvPresentationTimer *ev_timer)
 138 {
 139         ev_timer->priv->remaining = 0;
 140 }
 141
 142 void
 143 ev_presentation_timer_set_time (EvPresentationTimer *ev_timer,
 144                                 gint time)
 145 {
 146         if(ev_timer->priv->running)
 147                 ev_timer->priv->remaining = ((ev_timer->priv->remaining)/(ev_timer->priv->time)*time);
 148
 149         ev_timer->priv->time = (time < -1)? -1:time;
 150 }
 151
 152 static void
 153 ev_presentation_timer_dispose (GObject *gobject)
 154 {
 155         EvPresentationTimer *ev_timer = EV_PRESENTATION_TIMER (gobject);
 156         EvPresentationTimerPrivate *priv = EV_PRESENTATION_TIMER (ev_timer)->priv;
 157         if (priv->timeout > 0)
 158                 g_source_remove (priv->timeout);
 159         G_OBJECT_CLASS (ev_presentation_timer_parent_class)->dispose (gobject);
 160 }
 161
 162 static void
 163 ev_presentation_timer_class_init (EvPresentationTimerClass *klass)
 164 {
 165         GObjectClass    *object_class = G_OBJECT_CLASS (klass);
 166         GtkWidgetClass  *widget_class = GTK_WIDGET_CLASS (klass);
 167         g_type_class_add_private (object_class, sizeof (EvPresentationTimerPrivate));
 168         widget_class->draw = ev_presentation_timer_draw;
 169         object_class->dispose =  ev_presentation_timer_dispose;
 170 }
 171
 172 GtkWidget *
 173 ev_presentation_timer_new (void)
 174 {
 175         EvPresentationTimer     *ev_timer;
 176
 177         ev_timer = g_object_new (EV_TYPE_PRESENTATION_TIMER, NULL);
 178         return GTK_WIDGET (ev_timer);
 179 }