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, 2005 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-document-misc.h"
  35 #include "ev-job-queue.h"
  36 #include "ev-window.h"
  37 #include "ev-utils.h"
  38
  39 #define THUMBNAIL_WIDTH 100
  40
  41 /* Amount of time we devote to each iteration of the idle, in microseconds */
  42 #define IDLE_WORK_LENGTH 5000
  43
  44 struct _EvSidebarThumbnailsPrivate {
  45         GtkWidget *tree_view;
  46         GtkAdjustment *vadjustment;
  47         GtkListStore *list_store;
  48         EvDocument *document;
  49
  50         gint n_pages, pages_done;
  51 };
  52
  53 enum {
  54         COLUMN_PAGE_STRING,
  55         COLUMN_PIXBUF,
  56         COLUMN_THUMBNAIL_SET,
  57         COLUMN_JOB,
  58         NUM_COLUMNS
  59 };
  60
  61 G_DEFINE_TYPE (EvSidebarThumbnails, ev_sidebar_thumbnails, GTK_TYPE_VBOX);
  62
  63 #define EV_SIDEBAR_THUMBNAILS_GET_PRIVATE(object) \
  64         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_THUMBNAILS, EvSidebarThumbnailsPrivate));
  65
  66 static void
  67 ev_sidebar_thumbnails_class_init (EvSidebarThumbnailsClass *ev_sidebar_thumbnails_class)
  68 {
  69         GObjectClass *g_object_class;
  70         GtkObjectClass *gtk_object_class;
  71
  72         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
  73         gtk_object_class = GTK_OBJECT_CLASS (ev_sidebar_thumbnails_class);
  74
  75         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
  76 }
  77
  78 static void
  79 adjustment_changed_cb (GtkAdjustment       *adjustment,
  80                        EvSidebarThumbnails *ev_sidebar_thumbnails)
  81 {
  82         EvSidebarThumbnailsPrivate *priv;
  83         GtkTreePath *path;
  84         GtkTreeIter iter;
  85         int page;
  86         gboolean thumbnail_set;
  87
  88         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
  89
  90         gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
  91                                        1, 1, &path,
  92                                        NULL, NULL, NULL);
  93         if (!path)
  94                 return;
  95
  96         page = gtk_tree_path_get_indices (path)[0];
  97         gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store),
  98                                  &iter, path);
  99         gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 100                             COLUMN_THUMBNAIL_SET, &thumbnail_set,
 101                             -1);
 102 }
 103
 104 static void
 105 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 106                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 107 {
 108         EvSidebarThumbnailsPrivate *priv;
 109         EvPageCache *page_cache;
 110         GtkTreePath *path;
 111         GtkTreeIter iter;
 112         int page;
 113
 114         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 115
 116         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 117                 return;
 118
 119         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 120                                         &iter);
 121         page = gtk_tree_path_get_indices (path)[0] + 1;
 122         gtk_tree_path_free (path);
 123
 124         page_cache = ev_document_get_page_cache (priv->document);
 125         ev_page_cache_set_current_page (page_cache, page);
 126 }
 127
 128 static void
 129 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 130 {
 131         GtkWidget *swindow;
 132         EvSidebarThumbnailsPrivate *priv;
 133         GtkCellRenderer *renderer;
 134         GtkTreeSelection *selection;
 135
 136         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 137
 138         priv->list_store = gtk_list_store_new (NUM_COLUMNS, G_TYPE_STRING, GDK_TYPE_PIXBUF, G_TYPE_BOOLEAN, EV_TYPE_JOB_THUMBNAIL);
 139         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 140
 141         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 142         g_signal_connect (selection, "changed",
 143                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 144         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 145         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 146                                  "xpad", 2,
 147                                  "ypad", 2,
 148                                  NULL);
 149         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 150                                                      NULL, renderer,
 151                                                      "pixbuf", 1,
 152                                                      NULL);
 153         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 154                                                      NULL, gtk_cell_renderer_text_new (),
 155                                                      "markup", 0, NULL);
 156
 157         g_object_unref (priv->list_store);
 158
 159         swindow = gtk_scrolled_window_new (NULL, NULL);
 160         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
 161                                         GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 162         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (swindow),
 163                                              GTK_SHADOW_IN);
 164         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (swindow));
 165         g_signal_connect (G_OBJECT (priv->vadjustment), "value-changed",
 166                           G_CALLBACK (adjustment_changed_cb),
 167                           ev_sidebar_thumbnails);
 168         gtk_container_add (GTK_CONTAINER (swindow), priv->tree_view);
 169         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), swindow, TRUE, TRUE, 0);
 170
 171         gtk_widget_show_all (swindow);
 172 }
 173
 174 GtkWidget *
 175 ev_sidebar_thumbnails_new (void)
 176 {
 177         GtkWidget *ev_sidebar_thumbnails;
 178
 179         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 180
 181         return ev_sidebar_thumbnails;
 182 }
 183
 184 static void
 185 page_changed_cb (EvPageCache         *page_cache,
 186                  int                  page,
 187                  EvSidebarThumbnails *sidebar)
 188 {
 189         GtkTreePath *path;
 190         GtkTreeSelection *selection;
 191
 192         path = gtk_tree_path_new_from_indices (page - 1, -1);
 193         selection = gtk_tree_view_get_selection
 194                         (GTK_TREE_VIEW (sidebar->priv->tree_view));
 195
 196         gtk_tree_selection_select_path (selection, path);
 197         gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (sidebar->priv->tree_view),
 198                                       path, NULL, FALSE, 0.0, 0.0);
 199         gtk_tree_path_free (path);
 200 }
 201
 202 static void
 203 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 204                                   EvSidebarThumbnails *sidebar_thumbnails)
 205 {
 206         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 207         GtkTreeIter *iter;
 208
 209         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 210         gtk_list_store_set (priv->list_store,
 211                             iter,
 212                             COLUMN_PIXBUF, job->thumbnail,
 213                             COLUMN_THUMBNAIL_SET, TRUE,
 214                             COLUMN_JOB, NULL,
 215                             -1);
 216 }
 217
 218 void
 219 ev_sidebar_thumbnails_set_document (EvSidebarThumbnails *sidebar_thumbnails,
 220                                     EvDocument          *document)
 221 {
 222         GdkPixbuf *loading_icon;
 223         gint i, n_pages;
 224         GtkTreeIter iter;
 225         gchar *page;
 226         gint width = THUMBNAIL_WIDTH;
 227         gint height = THUMBNAIL_WIDTH;
 228         EvPageCache *page_cache;
 229
 230         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 231
 232         g_return_if_fail (EV_IS_DOCUMENT_THUMBNAILS (document));
 233
 234         page_cache = ev_document_get_page_cache (document);
 235         n_pages = ev_page_cache_get_n_pages (page_cache);
 236
 237         priv->document = document;
 238         priv->n_pages = n_pages;
 239
 240         /* We get the dimensions of the first doc so that we can make a blank
 241          * icon.  */
 242         g_mutex_lock (EV_DOC_MUTEX);
 243         ev_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (priv->document),
 244                                                1, THUMBNAIL_WIDTH, &width, &height);
 245         g_mutex_unlock (EV_DOC_MUTEX);
 246
 247         loading_icon = ev_document_misc_get_thumbnail_frame (width, height, NULL);
 248
 249         gtk_list_store_clear (priv->list_store);
 250         for (i = 1; i <= n_pages; i++) {
 251                 EvJob *job;
 252
 253                 /* FIXME: Bah.  This is still -1 for some reason.  Need to track it down.. */
 254                 job = ev_job_thumbnail_new (priv->document, i - 1, THUMBNAIL_WIDTH);
 255                 page = g_strdup_printf ("<i>%d</i>", i);
 256                 gtk_list_store_append (priv->list_store, &iter);
 257                 gtk_list_store_set (priv->list_store, &iter,
 258                                     COLUMN_PAGE_STRING, page,
 259                                     COLUMN_PIXBUF, loading_icon,
 260                                     COLUMN_THUMBNAIL_SET, FALSE,
 261                                     COLUMN_JOB, job,
 262                                     -1);
 263                 g_free (page);
 264                 ev_job_queue_add_job (job, EV_JOB_PRIORITY_LOW);
 265                 g_object_set_data_full (G_OBJECT (job), "tree_iter",
 266                                         gtk_tree_iter_copy (&iter),
 267                                         (GDestroyNotify) gtk_tree_iter_free);
 268                 g_signal_connect (job, "finished",
 269                                   G_CALLBACK (thumbnail_job_completed_callback),
 270                                   sidebar_thumbnails);
 271         }
 272
 273         g_object_unref (loading_icon);
 274
 275         /* Connect to the signal and trigger a fake callback */
 276         g_signal_connect (page_cache, "page-changed", G_CALLBACK (page_changed_cb), sidebar_thumbnails);
 277         page_changed_cb (page_cache, ev_page_cache_get_current_page (page_cache), sidebar_thumbnails);
 278
 279 }
 280