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 #include <glib/gi18n.h>
  32
  33 #include "ev-sidebar-page.h"
  34 #include "ev-sidebar-thumbnails.h"
  35 #include "ev-document-thumbnails.h"
  36 #include "ev-document-misc.h"
  37 #include "ev-job-queue.h"
  38 #include "ev-window.h"
  39 #include "ev-utils.h"
  40
  41 #define THUMBNAIL_WIDTH 100
  42
  43 /* The IconView doesn't scale nearly as well as the TreeView, so we arbitrarily
  44  * limit its use */
  45 #define MAX_ICON_VIEW_PAGE_COUNT 1500
  46
  47
  48 struct _EvSidebarThumbnailsPrivate {
  49         GtkWidget *swindow;
  50         GtkWidget *icon_view;
  51         GtkWidget *tree_view;
  52         GtkAdjustment *vadjustment;
  53         GtkListStore *list_store;
  54         GdkPixbuf *loading_icon;
  55         EvDocument *document;
  56         EvPageCache *page_cache;
  57
  58         gint n_pages, pages_done;
  59
  60         /* Visible pages */
  61         gint start_page, end_page;
  62 };
  63
  64 enum {
  65         COLUMN_PAGE_STRING,
  66         COLUMN_PIXBUF,
  67         COLUMN_THUMBNAIL_SET,
  68         COLUMN_JOB,
  69         NUM_COLUMNS
  70 };
  71
  72 enum {
  73         PROP_0,
  74         PROP_WIDGET,
  75 };
  76
  77 static void         ev_sidebar_thumbnails_clear_model      (EvSidebarThumbnails *sidebar);
  78 static gboolean     ev_sidebar_thumbnails_support_document (EvSidebarPage       *sidebar_page,
  79                                                             EvDocument          *document);
  80 static void         ev_sidebar_thumbnails_page_iface_init  (EvSidebarPageIface  *iface);
  81 static void         ev_sidebar_thumbnails_set_document     (EvSidebarPage       *sidebar_page,
  82                                                             EvDocument          *document);
  83 static const gchar* ev_sidebar_thumbnails_get_label        (EvSidebarPage       *sidebar_page);
  84 static void         thumbnail_job_completed_callback       (EvJobThumbnail      *job,
  85                                                             EvSidebarThumbnails *sidebar_thumbnails);
  86
  87 G_DEFINE_TYPE_EXTENDED (EvSidebarThumbnails,
  88                         ev_sidebar_thumbnails,
  89                         GTK_TYPE_VBOX,
  90                         0,
  91                         G_IMPLEMENT_INTERFACE (EV_TYPE_SIDEBAR_PAGE,
  92                                                ev_sidebar_thumbnails_page_iface_init))
  93
  94 #define EV_SIDEBAR_THUMBNAILS_GET_PRIVATE(object) \
  95         (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_SIDEBAR_THUMBNAILS, EvSidebarThumbnailsPrivate));
  96
  97
  98 static void
  99 ev_sidebar_thumbnails_dispose (GObject *object)
 100 {
 101         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (object);
 102
 103         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 104         if (sidebar_thumbnails->priv->loading_icon) {
 105                 g_object_unref (sidebar_thumbnails->priv->loading_icon);
 106                 sidebar_thumbnails->priv->loading_icon = NULL;
 107         }
 108
 109         if (sidebar_thumbnails->priv->list_store) {
 110                 g_object_unref (sidebar_thumbnails->priv->list_store);
 111                 sidebar_thumbnails->priv->list_store = NULL;
 112         }
 113
 114         G_OBJECT_CLASS (ev_sidebar_thumbnails_parent_class)->dispose (object);
 115 }
 116
 117 static void
 118 ev_sidebar_thumbnails_get_property (GObject    *object,
 119                                     guint       prop_id,
 120                                     GValue     *value,
 121                                     GParamSpec *pspec)
 122 {
 123         EvSidebarThumbnails *sidebar = EV_SIDEBAR_THUMBNAILS (object);
 124
 125         switch (prop_id)
 126         {
 127         case PROP_WIDGET:
 128                 if (sidebar->priv->tree_view)
 129                         g_value_set_object (value, sidebar->priv->tree_view);
 130                 else
 131                         g_value_set_object (value, sidebar->priv->icon_view);
 132                 break;
 133         default:
 134                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 135                 break;
 136         }
 137 }
 138
 139 static void
 140 ev_sidebar_thumbnails_class_init (EvSidebarThumbnailsClass *ev_sidebar_thumbnails_class)
 141 {
 142         GObjectClass *g_object_class;
 143         GtkObjectClass *gtk_object_class;
 144
 145         g_object_class = G_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 146         gtk_object_class = GTK_OBJECT_CLASS (ev_sidebar_thumbnails_class);
 147
 148         g_object_class->dispose = ev_sidebar_thumbnails_dispose;
 149         g_object_class->get_property = ev_sidebar_thumbnails_get_property;
 150
 151         g_object_class_override_property (g_object_class,
 152                                           PROP_WIDGET,
 153                                           "main-widget");
 154
 155         g_type_class_add_private (g_object_class, sizeof (EvSidebarThumbnailsPrivate));
 156 }
 157
 158 GtkWidget *
 159 ev_sidebar_thumbnails_new (void)
 160 {
 161         GtkWidget *ev_sidebar_thumbnails;
 162
 163         ev_sidebar_thumbnails = g_object_new (EV_TYPE_SIDEBAR_THUMBNAILS, NULL);
 164
 165         return ev_sidebar_thumbnails;
 166 }
 167
 168 static void
 169 clear_range (EvSidebarThumbnails *sidebar_thumbnails,
 170              gint                 start_page,
 171              gint                 end_page)
 172 {
 173         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 174         GtkTreePath *path;
 175         GtkTreeIter iter;
 176         gboolean result;
 177
 178         g_assert (start_page <= end_page);
 179
 180         path = gtk_tree_path_new_from_indices (start_page, -1);
 181         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 182              result && start_page <= end_page;
 183              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), start_page ++) {
 184                 EvJobThumbnail *job;
 185
 186                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store),
 187                                     &iter,
 188                                     COLUMN_JOB, &job,
 189                                     -1);
 190
 191                 if (job) {
 192                         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, sidebar_thumbnails);
 193                         ev_job_queue_remove_job (EV_JOB (job));
 194                         g_object_unref (job);
 195                 }
 196
 197                 gtk_list_store_set (priv->list_store, &iter,
 198                                     COLUMN_JOB, NULL,
 199                                     COLUMN_THUMBNAIL_SET, FALSE,
 200                                     COLUMN_PIXBUF, priv->loading_icon,
 201                                     -1);
 202         }
 203         gtk_tree_path_free (path);
 204 }
 205
 206 static void
 207 add_range (EvSidebarThumbnails *sidebar_thumbnails,
 208            gint                 start_page,
 209            gint                 end_page)
 210 {
 211         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 212         GtkTreePath *path;
 213         GtkTreeIter iter;
 214         gboolean result;
 215         gint page = start_page;
 216
 217         g_assert (start_page <= end_page);
 218
 219         path = gtk_tree_path_new_from_indices (start_page, -1);
 220         for (result = gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->list_store), &iter, path);
 221              result && page <= end_page;
 222              result = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->list_store), &iter), page ++) {
 223                 EvJobThumbnail *job;
 224                 gboolean thumbnail_set;
 225
 226                 gtk_tree_model_get (GTK_TREE_MODEL (priv->list_store), &iter,
 227                                     COLUMN_JOB, &job,
 228                                     COLUMN_THUMBNAIL_SET, &thumbnail_set,
 229                                     -1);
 230
 231                 if (job == NULL && !thumbnail_set) {
 232                         /* FIXME: Need rotation */
 233                         job = (EvJobThumbnail *)ev_job_thumbnail_new (priv->document, page, 0, THUMBNAIL_WIDTH);
 234                         ev_job_queue_add_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 235                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 236                                                 gtk_tree_iter_copy (&iter),
 237                                                 (GDestroyNotify) gtk_tree_iter_free);
 238                         g_signal_connect (job, "finished",
 239                                           G_CALLBACK (thumbnail_job_completed_callback),
 240                                           sidebar_thumbnails);
 241                         gtk_list_store_set (priv->list_store, &iter,
 242                                             COLUMN_JOB, job,
 243                                             -1);
 244                         /* The queue and the list own a ref to the job now */
 245                         g_object_unref (job);
 246                 } else if (job) {
 247                         g_object_unref (job);
 248                 }
 249         }
 250         gtk_tree_path_free (path);
 251 }
 252
 253 /* This modifies start */
 254 static void
 255 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 256                       gint                 start_page,
 257                       gint                 end_page)
 258 {
 259         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 260         int old_start_page, old_end_page;
 261
 262         old_start_page = priv->start_page;
 263         old_end_page = priv->end_page;
 264
 265         if (start_page == old_start_page &&
 266             end_page == old_end_page)
 267                 return;
 268
 269         /* Clear the areas we no longer display */
 270         if (old_start_page < start_page)
 271                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 272
 273         if (old_end_page > end_page)
 274                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 275
 276         add_range (sidebar_thumbnails, start_page, end_page);
 277
 278         priv->start_page = start_page;
 279         priv->end_page = end_page;
 280 }
 281
 282 static void
 283 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 284 {
 285         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 286         GtkTreePath *path = NULL;
 287         GtkTreePath *path2 = NULL;
 288         gint wy1;
 289         gint wy2;
 290
 291         if (priv->tree_view) {
 292                 if (! GTK_WIDGET_REALIZED (priv->tree_view))
 293                         return;
 294
 295                 gtk_tree_view_tree_to_widget_coords (GTK_TREE_VIEW (priv->tree_view),
 296                                                      0, (int) priv->vadjustment->value,
 297                                                      NULL, &wy1);
 298                 gtk_tree_view_tree_to_widget_coords (GTK_TREE_VIEW (priv->tree_view),
 299                                                      0, (int) (priv->vadjustment->value + priv->vadjustment->page_size),
 300                                                      NULL, &wy2);
 301                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 302                                                1, wy1 + 1, &path,
 303                                                NULL, NULL, NULL);
 304                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 305                                                1, wy2 -1, &path2,
 306                                                NULL, NULL, NULL);
 307         } else if (priv->icon_view) {
 308 #ifdef HAVE_GTK_ICON_VIEW_GET_VISIBLE_RANGE
 309                 if (! GTK_WIDGET_REALIZED (priv->icon_view))
 310                         return;
 311                 if (! gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2))
 312                         return;
 313 #else
 314                 g_assert_not_reached ();
 315 #endif
 316         } else {
 317                 return;
 318         }
 319
 320         if (path == NULL)
 321                 path = gtk_tree_path_new_first ();
 322         if (path2 == NULL)
 323                 path2 = gtk_tree_path_new_from_indices (priv->n_pages,
 324                                                         -1);
 325         update_visible_range (sidebar_thumbnails,
 326                               gtk_tree_path_get_indices (path)[0],
 327                               gtk_tree_path_get_indices (path2)[0]);
 328
 329         gtk_tree_path_free (path);
 330         gtk_tree_path_free (path2);
 331 }
 332
 333 static void
 334 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 335 {
 336         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 337         GtkTreeIter iter;
 338         int i;
 339
 340         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 341                 gchar *page_label;
 342                 gchar *page_string;
 343
 344                 page_label = ev_page_cache_get_page_label (priv->page_cache, i);
 345                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 346
 347                 gtk_list_store_append (priv->list_store, &iter);
 348                 gtk_list_store_set (priv->list_store, &iter,
 349                                     COLUMN_PAGE_STRING, page_string,
 350                                     COLUMN_PIXBUF, priv->loading_icon,
 351                                     COLUMN_THUMBNAIL_SET, FALSE,
 352                                     -1);
 353                 g_free (page_label);
 354                 g_free (page_string);
 355         }
 356 }
 357
 358 void
 359 ev_sidebar_thumbnails_refresh (EvSidebarThumbnails *sidebar_thumbnails)
 360 {
 361         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 362         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 363         adjustment_changed_cb (sidebar_thumbnails);
 364 }
 365
 366 static void
 367 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 368                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 369 {
 370         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 371         GtkTreePath *path;
 372         GtkTreeIter iter;
 373         int page;
 374
 375         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 376                 return;
 377
 378         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 379                                         &iter);
 380         page = gtk_tree_path_get_indices (path)[0];
 381         gtk_tree_path_free (path);
 382
 383         ev_page_cache_set_current_page (priv->page_cache, page);
 384 }
 385
 386 static void
 387 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 388                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 389 {
 390         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 391         GtkTreePath *path;
 392         GList *selected;
 393         int page;
 394
 395         selected = gtk_icon_view_get_selected_items (icon_view);
 396         if (selected == NULL)
 397                 return;
 398
 399         /* We don't handle or expect multiple selection. */
 400         g_assert (selected->next == NULL);
 401
 402         path = selected->data;
 403         page = gtk_tree_path_get_indices (path)[0];
 404
 405         gtk_tree_path_free (path);
 406         g_list_free (selected);
 407
 408         ev_page_cache_set_current_page (priv->page_cache, page);
 409 }
 410
 411 static void
 412 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 413 {
 414         EvSidebarThumbnailsPrivate *priv;
 415         GtkTreeSelection *selection;
 416         GtkCellRenderer *renderer;
 417
 418         priv = ev_sidebar_thumbnails->priv;
 419         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 420
 421         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 422         g_signal_connect (selection, "changed",
 423                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 424         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 425         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 426                                  "xpad", 2,
 427                                  "ypad", 2,
 428                                  NULL);
 429         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 430                                                      NULL, renderer,
 431                                                      "pixbuf", 1,
 432                                                      NULL);
 433         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 434                                                      NULL, gtk_cell_renderer_text_new (),
 435                                                      "markup", 0, NULL);
 436         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 437         gtk_widget_show (priv->tree_view);
 438 }
 439
 440 static void
 441 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 442 {
 443         EvSidebarThumbnailsPrivate *priv;
 444
 445         priv = ev_sidebar_thumbnails->priv;
 446
 447         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 448         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 449         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 450         g_signal_connect (priv->icon_view, "selection-changed",
 451                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 452
 453         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 454         gtk_widget_show (priv->icon_view);
 455 }
 456
 457 static gboolean
 458 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 459 {
 460 #ifdef HAVE_GTK_ICON_VIEW_GET_VISIBLE_RANGE
 461         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 462         if (ev_page_cache_get_n_pages (priv->page_cache) > MAX_ICON_VIEW_PAGE_COUNT)
 463                 return FALSE;
 464         return TRUE;
 465 #else
 466         return FALSE;
 467 #endif
 468 }
 469
 470 static void
 471 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 472 {
 473         EvSidebarThumbnailsPrivate *priv;
 474
 475         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 476
 477         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 478                                                G_TYPE_STRING,
 479                                                GDK_TYPE_PIXBUF,
 480                                                G_TYPE_BOOLEAN,
 481                                                EV_TYPE_JOB_THUMBNAIL);
 482
 483         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 484         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 485                                         GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 486         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 487                                              GTK_SHADOW_IN);
 488         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 489         g_signal_connect_data (G_OBJECT (priv->vadjustment), "value-changed",
 490                                G_CALLBACK (adjustment_changed_cb),
 491                                ev_sidebar_thumbnails, NULL,
 492                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 493         g_signal_connect_swapped (G_OBJECT (priv->swindow), "size-allocate",
 494                                   G_CALLBACK (adjustment_changed_cb),
 495                                   ev_sidebar_thumbnails);
 496         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 497
 498         /* Put it all together */
 499         gtk_widget_show_all (priv->swindow);
 500 }
 501
 502 static void
 503 page_changed_cb (EvPageCache         *page_cache,
 504                  int                  page,
 505                  EvSidebarThumbnails *sidebar)
 506 {
 507         GtkTreeView *tree_view;
 508         GtkTreePath *path;
 509
 510         path = gtk_tree_path_new_from_indices (page, -1);
 511
 512         if (sidebar->priv->tree_view) {
 513                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 514                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 515                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 516         } else if (sidebar->priv->icon_view) {
 517                 /* Guard against gtk-2.6 */
 518 #ifdef HAVE_GTK_ICON_VIEW_GET_VISIBLE_RANGE
 519                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 520                 gtk_icon_view_set_cursor (GTK_ICON_VIEW (sidebar->priv->icon_view), path, NULL, FALSE);
 521 #endif
 522         }
 523
 524         gtk_tree_path_free (path);
 525 }
 526
 527 static void
 528 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 529                                   EvSidebarThumbnails *sidebar_thumbnails)
 530 {
 531         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 532         GtkTreeIter *iter;
 533
 534         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 535         gtk_list_store_set (priv->list_store,
 536                             iter,
 537                             COLUMN_PIXBUF, job->thumbnail,
 538                             COLUMN_THUMBNAIL_SET, TRUE,
 539                             COLUMN_JOB, NULL,
 540                             -1);
 541 }
 542
 543 static void
 544 ev_sidebar_thumbnails_set_document (EvSidebarPage       *sidebar_page,
 545                                     EvDocument          *document)
 546 {
 547         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 548         gint width = THUMBNAIL_WIDTH;
 549         gint height = THUMBNAIL_WIDTH;
 550
 551         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 552
 553         g_return_if_fail (EV_IS_DOCUMENT_THUMBNAILS (document));
 554
 555         priv->page_cache = ev_page_cache_get (document);
 556         priv->document = document;
 557         priv->n_pages = ev_page_cache_get_n_pages (priv->page_cache);
 558
 559         /* We get the dimensions of the first doc so that we can make a blank
 560          * icon.  */
 561         ev_document_doc_mutex_lock ();
 562         ev_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (priv->document),
 563                                                0, THUMBNAIL_WIDTH, &width, &height);
 564         ev_document_doc_mutex_unlock ();
 565
 566         if (priv->loading_icon)
 567                 g_object_unref (priv->loading_icon);
 568         priv->loading_icon = ev_document_misc_get_thumbnail_frame (width, height, NULL);
 569
 570         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 571         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 572
 573         /* Create the view widget, and remove the old one, if needed */
 574         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 575                 if (priv->tree_view) {
 576                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 577                         priv->tree_view = NULL;
 578                 }
 579
 580                 if (! priv->icon_view) {
 581                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 582                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 583                 }
 584         } else {
 585                 if (priv->icon_view) {
 586                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 587                         priv->icon_view = NULL;
 588                 }
 589
 590                 if (! priv->tree_view) {
 591                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 592                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 593                 }
 594         }
 595
 596         /* Connect to the signal and trigger a fake callback */
 597         g_signal_connect (priv->page_cache, "page-changed", G_CALLBACK (page_changed_cb), sidebar_thumbnails);
 598         adjustment_changed_cb (sidebar_thumbnails);
 599 }
 600
 601 static gboolean
 602 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 603                                  GtkTreePath *path,
 604                                  GtkTreeIter *iter,
 605                                  gpointer data)
 606 {
 607     EvJob *job;
 608
 609     gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 610
 611     if (job != NULL) {
 612         ev_job_queue_remove_job (job);
 613         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 614         g_object_unref (job);
 615     }
 616
 617     return FALSE;
 618 }
 619
 620 static void
 621 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 622 {
 623     EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 624
 625     gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 626     gtk_list_store_clear (priv->list_store);
 627 }
 628
 629 static gboolean
 630 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 631                                         EvDocument *document)
 632 {
 633         return (EV_IS_DOCUMENT_THUMBNAILS (document) &&
 634                     (ev_document_get_n_pages (document) > 1));
 635 }
 636
 637 static const gchar*
 638 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 639 {
 640     return _("Thumbnails");
 641 }
 642
 643 static void
 644 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageIface *iface)
 645 {
 646         iface->support_document = ev_sidebar_thumbnails_support_document;
 647         iface->set_document = ev_sidebar_thumbnails_set_document;
 648         iface->get_label = ev_sidebar_thumbnails_get_label;
 649 }
 650