shell/ev-sidebar-thumbnails.c

   1 /* this file is part of evince, a gnome document viewer
   2  *
   3  *  Copyright (C) 2004 Red Hat, Inc.
   4  *  Copyright (C) 2004 Anders Carlsson <andersca@gnome.org>
   5  *
   6  *  Authors:
   7  *    Jonathan Blandford <jrb@alum.mit.edu>
   8  *    Anders Carlsson <andersca@gnome.org>
   9  *
  10  * Evince is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * Evince is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include "config.h"
  27 #endif
  28
  29 #include <string.h>
  30 #include <gtk/gtk.h>
  31
  32 #include "ev-sidebar-thumbnails.h"
  33 #include "ev-document-thumbnails.h"
  34 #include "ev-utils.h"
  35
  36 #define THUMBNAIL_WIDTH 75
  37 /* Amount of time we devote to each iteration of the idle, in microseconds */
  38 #define IDLE_WORK_LENGTH 5000
  39
  40 struct _EvSidebarThumbnailsPrivate {
  41         GtkWidget *tree_view;
  42         GtkListStore *list_store;
  43         EvDocument *document;
  44
  45         guint idle_id;
  46         gint current_page, n_pages;
  47 };
  48
  49 enum {
  50         COLUMN_PAGE_STRING,
  51         COLUMN_PIXBUF,
  52         NUM_COLUMNS
  53 };
  54
  55 static GtkVBoxClass *parent_class;
  56
  57 G_DEFINE_TYPE (EvSidebarThumbnails, ev_sidebar_thumbnails, GTK_TYPE_VBOX);
  58
  59 #define EV_SIDEBAR_THUMBNAILS_GET_PRIVATE(object) \
  60         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_THUMBNAILS, EvSidebarThumbnailsPrivate));
  61
  62 static void
  63 ev_sidebar_thumbnails_destroy (GtkObject *object)
  64 {
  65         EvSidebarThumbnails *ev_sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (object);
  66         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
  67
  68         if (priv->idle_id != 0) {
  69                 g_source_remove (priv->idle_id);
  70
  71                 priv->idle_id = 0;
  72         }
  73
  74         GTK_OBJECT_CLASS (parent_class)->destroy (object);
  75 }
  76
  77 static void
  78 ev_sidebar_thumbnails_class_init (EvSidebarThumbnailsClass *ev_sidebar_thumbnails_class)
  79 {
  80         GObjectClass *g_object_class;
  81         GtkObjectClass *gtk_object_class;
  82
  83         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
  84         gtk_object_class = GTK_OBJECT_CLASS (ev_sidebar_thumbnails_class);
  85
  86         parent_class = g_type_class_peek_parent (ev_sidebar_thumbnails_class);
  87
  88         gtk_object_class->destroy = ev_sidebar_thumbnails_destroy;
  89
  90         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
  91
  92 }
  93
  94 static void
  95 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
  96 {
  97         GtkWidget *swindow;
  98         EvSidebarThumbnailsPrivate *priv;
  99         GtkCellRenderer *renderer;
 100
 101         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 102
 103         priv->list_store = gtk_list_store_new (NUM_COLUMNS, G_TYPE_STRING, GDK_TYPE_PIXBUF);
 104         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 105
 106         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 107         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 108                                  "xpad", 2,
 109                                  "ypad", 2,
 110                                  NULL);
 111         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 112                                                      NULL, renderer,
 113                                                      "pixbuf", 1,
 114                                                      NULL);
 115         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 116                                                      NULL, gtk_cell_renderer_text_new (),
 117                                                      "markup", 0, NULL);
 118
 119         g_object_unref (priv->list_store);
 120
 121         swindow = gtk_scrolled_window_new (NULL, NULL);
 122         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
 123                                         GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 124         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (swindow),
 125                                              GTK_SHADOW_IN);
 126
 127         gtk_container_add (GTK_CONTAINER (swindow), priv->tree_view);
 128         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), swindow, TRUE, TRUE, 0);
 129
 130         gtk_widget_show_all (swindow);
 131 }
 132
 133 GtkWidget *
 134 ev_sidebar_thumbnails_new (void)
 135 {
 136         GtkWidget *ev_sidebar_thumbnails;
 137
 138         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 139
 140         return ev_sidebar_thumbnails;
 141 }
 142
 143 static gboolean
 144 do_one_iteration (EvSidebarThumbnails *ev_sidebar_thumbnails)
 145 {
 146         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 147         GdkPixbuf *pixbuf;
 148         GtkTreePath *path;
 149         GtkTreeIter iter;
 150
 151         pixbuf = ev_document_thumbnails_get_thumbnail (EV_DOCUMENT_THUMBNAILS (priv->document),
 152                                                        priv->current_page, THUMBNAIL_WIDTH);
 153
 154         path = gtk_tree_path_new_from_indices (priv->current_page, -1);
 155         gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 156         gtk_tree_path_free (path);
 157
 158         gtk_list_store_set (priv->list_store, &iter,
 159                             COLUMN_PIXBUF, pixbuf,
 160                             -1);
 161
 162         g_object_unref (pixbuf);
 163
 164         priv->current_page++;
 165
 166         if (priv->current_page == priv->n_pages)
 167                 return FALSE;
 168         else
 169                 return TRUE;
 170 }
 171
 172 static gboolean
 173 populate_thumbnails_idle (gpointer data)
 174 {
 175         GTimer *timer;
 176         gint i;
 177         gulong microseconds = 0;
 178
 179         EvSidebarThumbnails *ev_sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (data);
 180         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 181
 182         if (priv->current_page == priv->n_pages) {
 183                 priv->idle_id = 0;
 184                 return FALSE;
 185         }
 186
 187         timer = g_timer_new ();
 188         i = 0;
 189         g_timer_start (timer);
 190         while (do_one_iteration (ev_sidebar_thumbnails)) {
 191                 i++;
 192                 g_timer_elapsed (timer, &microseconds);
 193                 if (microseconds > IDLE_WORK_LENGTH)
 194                         break;
 195         }
 196         g_timer_destroy (timer);
 197 #if 0
 198         g_print ("%d rows done this idle in %d\n", i, (int)microseconds);
 199 #endif
 200
 201         return TRUE;
 202 }
 203
 204 void
 205 ev_sidebar_thumbnails_set_document (EvSidebarThumbnails *sidebar_thumbnails,
 206                                     EvDocument          *document)
 207 {
 208         GtkIconTheme *theme;
 209         GdkPixbuf *loading_icon;
 210         gint i, n_pages;
 211         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 212
 213         g_return_if_fail (EV_IS_DOCUMENT_THUMBNAILS (document));
 214
 215         if (priv->idle_id != 0) {
 216                 g_source_remove (priv->idle_id);
 217         }
 218
 219         theme = gtk_icon_theme_get_for_screen (gtk_widget_get_screen (GTK_WIDGET (sidebar_thumbnails)));
 220
 221         loading_icon = gtk_icon_theme_load_icon (theme, "gnome-fs-loading-icon",
 222                                                  THUMBNAIL_WIDTH, 0, NULL);
 223
 224         n_pages = ev_document_get_n_pages (document);
 225
 226         for (i = 0; i < n_pages; i++) {
 227                 GtkTreeIter iter;
 228                 gchar *page;
 229
 230                 page = g_strdup_printf ("<i>%d</i>", i + 1);
 231                 gtk_list_store_append (sidebar_thumbnails->priv->list_store,
 232                                        &iter);
 233                 gtk_list_store_set (sidebar_thumbnails->priv->list_store,
 234                                     &iter,
 235                                     COLUMN_PAGE_STRING, page,
 236                                     COLUMN_PIXBUF, loading_icon,
 237                                     -1);
 238                 g_free (page);
 239         }
 240
 241         priv->document = document;
 242         priv->idle_id = g_idle_add (populate_thumbnails_idle, sidebar_thumbnails);
 243         priv->n_pages = n_pages;
 244         priv->current_page = 0;
 245 }
 246