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, ev_timer->priv->remaining)*(allocation.width);
  69                 cairo_rectangle (cr, allocation.width-progress, 10, (allocation.width-(allocation.width-progress))-10, allocation.height-5);
  70                 cairo_stroke_preserve (cr);
  71                 cairo_fill(cr);
  72         }
  73         return FALSE;
  74 }
  75
  76 static gboolean
  77 timeout_cb (gpointer data)
  78 {
  79         EvPresentationTimer *ev_timer = EV_PRESENTATION_TIMER(data);
  80         ev_timer->priv->remaining--;
  81
  82         if(time >= 0 && ev_timer->priv->remaining >= 0)
  83         {
  84                 gtk_widget_queue_draw(GTK_WIDGET(ev_timer));
  85         } else
  86                 ev_timer->priv->running = FALSE;
  87         return ev_timer->priv->running;
  88 }
  89
  90 void
  91 ev_presentation_timer_set_pages (EvPresentationTimer *ev_timer, guint pages)
  92 {
  93         ev_timer->priv->pages = pages -1;
  94 }
  95
  96 void
  97 ev_presentation_timer_set_page (EvPresentationTimer *ev_timer, guint page)
  98 {
  99         if (page >= ev_timer->priv->pages)
 100         {
 101                 page = ev_timer->priv->pages;
 102                 ev_timer->priv->running=FALSE;
 103         }
 104         ev_timer->priv->page = page;
 105         gtk_widget_queue_draw(GTK_WIDGET(ev_timer));
 106 }
 107
 108 static void
 109 ev_presentation_timer_init (EvPresentationTimer *ev_timer)
 110 {
 111         ev_timer->priv = EV_PRESENTATION_TIMER_GET_PRIVATE (ev_timer);
 112         ev_timer->priv->page = 0;
 113         ev_timer->priv->pages = 0;
 114         ev_timer->priv->remaining = 0;
 115         ev_timer->priv->time = 0;
 116         ev_timer->priv->running = FALSE;
 117 }
 118
 119 void
 120 ev_presentation_timer_start (EvPresentationTimer *ev_timer)
 121 {
 122         if (ev_timer->priv->running == FALSE)
 123         {
 124                 ev_timer->priv->remaining = (ev_timer->priv->time)*60;
 125                 ev_timer->priv->running = TRUE;
 126                 g_timeout_add_seconds (1, timeout_cb, ev_timer);
 127         }
 128 }
 129
 130 void
 131 ev_presentation_timer_stop (EvPresentationTimer *ev_timer)
 132 {
 133         ev_timer->priv->remaining = 0;
 134 }
 135
 136 void
 137 ev_presentation_timer_set_time (EvPresentationTimer *ev_timer,
 138                                 gint time)
 139 {
 140         if(ev_timer->priv->running)
 141                 ev_timer->priv->remaining = ((ev_timer->priv->remaining)/(ev_timer->priv->time)*time);
 142
 143         ev_timer->priv->time = (time < -1)? -1:time;
 144 }
 145
 146 static void
 147 ev_presentation_timer_class_init (EvPresentationTimerClass *klass)
 148 {
 149         GObjectClass    *object_class = G_OBJECT_CLASS (klass);
 150         GtkWidgetClass  *widget_class = GTK_WIDGET_CLASS (klass);
 151         g_type_class_add_private (object_class, sizeof (EvPresentationTimerPrivate));
 152         widget_class->draw = ev_presentation_timer_draw;
 153         /*object_class->finalize = ev_presentation_timer_finalize;*/
 154 }
 155
 156 GtkWidget *
 157 ev_presentation_timer_new (void)
 158 {
 159         EvPresentationTimer     *ev_timer;
 160
 161         ev_timer = g_object_new (EV_TYPE_PRESENTATION_TIMER, NULL);
 162         return GTK_WIDGET (ev_timer);
 163 }