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         gboolean   running;
  41 };
  42
  43 #define EV_PRESENTATION_TIMER_GET_PRIVATE(object) \
  44         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_PRESENTATION_TIMER, EvPresentationTimerPrivate))
  45
  46 G_DEFINE_TYPE (EvPresentationTimer, ev_presentation_timer, GTK_TYPE_DRAWING_AREA);
  47
  48 static gdouble
  49 ev_presentation_timer_progress (gdouble time, gdouble remaining)
  50 {
  51         return remaining/(time*60);
  52 }
  53
  54 static gboolean
  55 ev_presentation_timer_draw(GtkWidget *timer, cairo_t *cr)
  56 {
  57         EvPresentationTimer *ev_timer = EV_PRESENTATION_TIMER(timer);
  58         GtkAllocation allocation;
  59         gtk_widget_get_allocation (timer, &allocation);
  60         cairo_set_source_rgb (cr, 0, 0, 0);
  61         cairo_set_line_width (cr, 5);
  62         guint pos = (allocation.width/ev_timer->priv->pages)*ev_timer->priv->page;
  63         cairo_move_to (cr,pos,2);
  64         cairo_line_to (cr,pos,allocation.height);
  65         cairo_stroke (cr);
  66         if(ev_timer->priv->running && ev_timer->priv->time > 0 && ev_timer->priv->remaining > 0)
  67         {
  68                 gdouble progress = ev_presentation_timer_progress (ev_timer->priv->time,
  69                                                                    ev_timer->priv->remaining)*(allocation.width);
  70                 cairo_rectangle (cr, allocation.width-progress,
  71                                  10,
  72                                  (allocation.width-(allocation.width-progress))-10,
  73                                  allocation.height-5);
  74                 cairo_stroke_preserve (cr);
  75                 cairo_fill(cr);
  76         }
  77         return FALSE;
  78 }
  79
  80 static gboolean
  81 timeout_cb (gpointer data)
  82 {
  83         EvPresentationTimer *ev_timer = EV_PRESENTATION_TIMER(data);
  84         ev_timer->priv->remaining--;
  85
  86         if(time >= 0 && ev_timer->priv->remaining >= 0)
  87         {
  88                 gtk_widget_queue_draw(GTK_WIDGET(ev_timer));
  89         } else
  90                 ev_timer->priv->running = FALSE;
  91         return ev_timer->priv->running;
  92 }
  93
  94 void
  95 ev_presentation_timer_set_pages (EvPresentationTimer *ev_timer, guint pages)
  96 {
  97         ev_timer->priv->pages = pages -1;
  98 }
  99
 100 void
 101 ev_presentation_timer_set_page (EvPresentationTimer *ev_timer, guint page)
 102 {
 103         if (page >= ev_timer->priv->pages)
 104         {
 105                 page = ev_timer->priv->pages;
 106                 ev_timer->priv->running=FALSE;
 107         }
 108         ev_timer->priv->page = page;
 109         gtk_widget_queue_draw(GTK_WIDGET(ev_timer));
 110 }
 111
 112 static void
 113 ev_presentation_timer_init (EvPresentationTimer *ev_timer)
 114 {
 115         ev_timer->priv = EV_PRESENTATION_TIMER_GET_PRIVATE (ev_timer);
 116         ev_timer->priv->page = 0;
 117         ev_timer->priv->pages = 0;
 118         ev_timer->priv->remaining = 0;
 119         ev_timer->priv->time = 0;
 120         ev_timer->priv->running = FALSE;
 121 }
 122
 123 void
 124 ev_presentation_timer_start (EvPresentationTimer *ev_timer)
 125 {
 126         if (ev_timer->priv->running == FALSE)
 127         {
 128                 ev_timer->priv->remaining = (ev_timer->priv->time)*60;
 129                 ev_timer->priv->running = TRUE;
 130                 g_timeout_add_seconds (1, timeout_cb, ev_timer);
 131         }
 132 }
 133
 134 void
 135 ev_presentation_timer_stop (EvPresentationTimer *ev_timer)
 136 {
 137         ev_timer->priv->remaining = 0;
 138 }
 139
 140 void
 141 ev_presentation_timer_set_time (EvPresentationTimer *ev_timer,
 142                                 gint time)
 143 {
 144         if(ev_timer->priv->running)
 145                 ev_timer->priv->remaining = ((ev_timer->priv->remaining)/(ev_timer->priv->time)*time);
 146
 147         ev_timer->priv->time = (time < -1)? -1:time;
 148 }
 149
 150 static void
 151 ev_presentation_timer_class_init (EvPresentationTimerClass *klass)
 152 {
 153         GObjectClass    *object_class = G_OBJECT_CLASS (klass);
 154         GtkWidgetClass  *widget_class = GTK_WIDGET_CLASS (klass);
 155         g_type_class_add_private (object_class, sizeof (EvPresentationTimerPrivate));
 156         widget_class->draw = ev_presentation_timer_draw;
 157         /*object_class->finalize = ev_presentation_timer_finalize;*/
 158 }
 159
 160 GtkWidget *
 161 ev_presentation_timer_new (void)
 162 {
 163         EvPresentationTimer     *ev_timer;
 164
 165         ev_timer = g_object_new (EV_TYPE_PRESENTATION_TIMER, NULL);
 166         return GTK_WIDGET (ev_timer);
 167 }