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                         job = (EvJobThumbnail *)ev_job_thumbnail_new (priv->document, page, THUMBNAIL_WIDTH);
 233                         ev_job_queue_add_job (EV_JOB (job), EV_JOB_PRIORITY_HIGH);
 234                         g_object_set_data_full (G_OBJECT (job), "tree_iter",
 235                                                 gtk_tree_iter_copy (&iter),
 236                                                 (GDestroyNotify) gtk_tree_iter_free);
 237                         g_signal_connect (job, "finished",
 238                                           G_CALLBACK (thumbnail_job_completed_callback),
 239                                           sidebar_thumbnails);
 240                         gtk_list_store_set (priv->list_store, &iter,
 241                                             COLUMN_JOB, job,
 242                                             -1);
 243                         /* The queue and the list own a ref to the job now */
 244                         g_object_unref (job);
 245                 } else if (job) {
 246                         g_object_unref (job);
 247                 }
 248         }
 249         gtk_tree_path_free (path);
 250 }
 251
 252 /* This modifies start */
 253 static void
 254 update_visible_range (EvSidebarThumbnails *sidebar_thumbnails,
 255                       gint                 start_page,
 256                       gint                 end_page)
 257 {
 258         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 259         int old_start_page, old_end_page;
 260
 261         old_start_page = priv->start_page;
 262         old_end_page = priv->end_page;
 263
 264         if (start_page == old_start_page &&
 265             end_page == old_end_page)
 266                 return;
 267
 268         /* Clear the areas we no longer display */
 269         if (old_start_page < start_page)
 270                 clear_range (sidebar_thumbnails, old_start_page, MIN (start_page - 1, old_end_page));
 271
 272         if (old_end_page > end_page)
 273                 clear_range (sidebar_thumbnails, MAX (end_page + 1, old_start_page), old_end_page);
 274
 275         add_range (sidebar_thumbnails, start_page, end_page);
 276
 277         priv->start_page = start_page;
 278         priv->end_page = end_page;
 279 }
 280
 281 static void
 282 adjustment_changed_cb (EvSidebarThumbnails *sidebar_thumbnails)
 283 {
 284         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 285         GtkTreePath *path = NULL;
 286         GtkTreePath *path2 = NULL;
 287         gint wy1;
 288         gint wy2;
 289
 290         if (priv->tree_view) {
 291                 if (! GTK_WIDGET_REALIZED (priv->tree_view))
 292                         return;
 293
 294                 gtk_tree_view_tree_to_widget_coords (GTK_TREE_VIEW (priv->tree_view),
 295                                                      0, (int) priv->vadjustment->value,
 296                                                      NULL, &wy1);
 297                 gtk_tree_view_tree_to_widget_coords (GTK_TREE_VIEW (priv->tree_view),
 298                                                      0, (int) (priv->vadjustment->value + priv->vadjustment->page_size),
 299                                                      NULL, &wy2);
 300                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 301                                                1, wy1 + 1, &path,
 302                                                NULL, NULL, NULL);
 303                 gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (priv->tree_view),
 304                                                1, wy2 -1, &path2,
 305                                                NULL, NULL, NULL);
 306         } else if (priv->icon_view) {
 307 #ifdef HAVE_GTK_ICON_VIEW_GET_VISIBLE_RANGE
 308                 if (! GTK_WIDGET_REALIZED (priv->icon_view))
 309                         return;
 310                 gtk_icon_view_get_visible_range (GTK_ICON_VIEW (priv->icon_view), &path, &path2);
 311 #else
 312                 g_assert_not_reached ();
 313 #endif
 314         } else {
 315                 return;
 316         }
 317
 318         if (path == NULL)
 319                 path = gtk_tree_path_new_first ();
 320         if (path2 == NULL)
 321                 path2 = gtk_tree_path_new_from_indices (priv->n_pages,
 322                                                         -1);
 323         update_visible_range (sidebar_thumbnails,
 324                               gtk_tree_path_get_indices (path)[0],
 325                               gtk_tree_path_get_indices (path2)[0]);
 326
 327         gtk_tree_path_free (path);
 328         gtk_tree_path_free (path2);
 329 }
 330
 331 static void
 332 ev_sidebar_thumbnails_fill_model (EvSidebarThumbnails *sidebar_thumbnails)
 333 {
 334         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 335         GtkTreeIter iter;
 336         int i;
 337
 338         for (i = 0; i < sidebar_thumbnails->priv->n_pages; i++) {
 339                 gchar *page_label;
 340                 gchar *page_string;
 341
 342                 page_label = ev_page_cache_get_page_label (priv->page_cache, i);
 343                 page_string = g_markup_printf_escaped ("<i>%s</i>", page_label);
 344
 345                 gtk_list_store_append (priv->list_store, &iter);
 346                 gtk_list_store_set (priv->list_store, &iter,
 347                                     COLUMN_PAGE_STRING, page_string,
 348                                     COLUMN_PIXBUF, priv->loading_icon,
 349                                     COLUMN_THUMBNAIL_SET, FALSE,
 350                                     -1);
 351                 g_free (page_label);
 352                 g_free (page_string);
 353         }
 354 }
 355
 356 void
 357 ev_sidebar_thumbnails_refresh (EvSidebarThumbnails *sidebar_thumbnails)
 358 {
 359         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 360         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 361         adjustment_changed_cb (sidebar_thumbnails);
 362 }
 363
 364 static void
 365 ev_sidebar_tree_selection_changed (GtkTreeSelection *selection,
 366                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 367 {
 368         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 369         GtkTreePath *path;
 370         GtkTreeIter iter;
 371         int page;
 372
 373         if (!gtk_tree_selection_get_selected (selection, NULL, &iter))
 374                 return;
 375
 376         path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->list_store),
 377                                         &iter);
 378         page = gtk_tree_path_get_indices (path)[0];
 379         gtk_tree_path_free (path);
 380
 381         ev_page_cache_set_current_page (priv->page_cache, page);
 382 }
 383
 384 static void
 385 ev_sidebar_icon_selection_changed (GtkIconView         *icon_view,
 386                                    EvSidebarThumbnails *ev_sidebar_thumbnails)
 387 {
 388         EvSidebarThumbnailsPrivate *priv = ev_sidebar_thumbnails->priv;
 389         GtkTreePath *path;
 390         GList *selected;
 391         int page;
 392
 393         selected = gtk_icon_view_get_selected_items (icon_view);
 394         if (selected == NULL)
 395                 return;
 396
 397         /* We don't handle or expect multiple selection. */
 398         g_assert (selected->next == NULL);
 399
 400         path = selected->data;
 401         page = gtk_tree_path_get_indices (path)[0];
 402
 403         gtk_tree_path_free (path);
 404         g_list_free (selected);
 405
 406         ev_page_cache_set_current_page (priv->page_cache, page);
 407 }
 408
 409 static void
 410 ev_sidebar_init_tree_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 411 {
 412         EvSidebarThumbnailsPrivate *priv;
 413         GtkTreeSelection *selection;
 414         GtkCellRenderer *renderer;
 415
 416         priv = ev_sidebar_thumbnails->priv;
 417         priv->tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 418
 419         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->tree_view));
 420         g_signal_connect (selection, "changed",
 421                           G_CALLBACK (ev_sidebar_tree_selection_changed), ev_sidebar_thumbnails);
 422         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (priv->tree_view), FALSE);
 423         renderer = g_object_new (GTK_TYPE_CELL_RENDERER_PIXBUF,
 424                                  "xpad", 2,
 425                                  "ypad", 2,
 426                                  NULL);
 427         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 428                                                      NULL, renderer,
 429                                                      "pixbuf", 1,
 430                                                      NULL);
 431         gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (priv->tree_view), -1,
 432                                                      NULL, gtk_cell_renderer_text_new (),
 433                                                      "markup", 0, NULL);
 434         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->tree_view);
 435         gtk_widget_show (priv->tree_view);
 436 }
 437
 438 static void
 439 ev_sidebar_init_icon_view (EvSidebarThumbnails *ev_sidebar_thumbnails)
 440 {
 441         EvSidebarThumbnailsPrivate *priv;
 442
 443         priv = ev_sidebar_thumbnails->priv;
 444
 445         priv->icon_view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->list_store));
 446         gtk_icon_view_set_markup_column (GTK_ICON_VIEW (priv->icon_view), 0);
 447         gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW (priv->icon_view), 1);
 448         g_signal_connect (priv->icon_view, "selection-changed",
 449                           G_CALLBACK (ev_sidebar_icon_selection_changed), ev_sidebar_thumbnails);
 450
 451         gtk_container_add (GTK_CONTAINER (priv->swindow), priv->icon_view);
 452         gtk_widget_show (priv->icon_view);
 453 }
 454
 455 static gboolean
 456 ev_sidebar_thumbnails_use_icon_view (EvSidebarThumbnails *sidebar_thumbnails)
 457 {
 458 #ifdef HAVE_GTK_ICON_VIEW_GET_VISIBLE_RANGE
 459         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 460         if (ev_page_cache_get_n_pages (priv->page_cache) > MAX_ICON_VIEW_PAGE_COUNT)
 461                 return FALSE;
 462         return TRUE;
 463 #else
 464         return FALSE;
 465 #endif
 466 }
 467
 468 static void
 469 ev_sidebar_thumbnails_init (EvSidebarThumbnails *ev_sidebar_thumbnails)
 470 {
 471         EvSidebarThumbnailsPrivate *priv;
 472
 473         priv = ev_sidebar_thumbnails->priv = EV_SIDEBAR_THUMBNAILS_GET_PRIVATE (ev_sidebar_thumbnails);
 474
 475         priv->list_store = gtk_list_store_new (NUM_COLUMNS,
 476                                                G_TYPE_STRING,
 477                                                GDK_TYPE_PIXBUF,
 478                                                G_TYPE_BOOLEAN,
 479                                                EV_TYPE_JOB_THUMBNAIL);
 480
 481         priv->swindow = gtk_scrolled_window_new (NULL, NULL);
 482         gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (priv->swindow),
 483                                         GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 484         gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (priv->swindow),
 485                                              GTK_SHADOW_IN);
 486         priv->vadjustment = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (priv->swindow));
 487         g_signal_connect_data (G_OBJECT (priv->vadjustment), "value-changed",
 488                                G_CALLBACK (adjustment_changed_cb),
 489                                ev_sidebar_thumbnails, NULL,
 490                                G_CONNECT_SWAPPED | G_CONNECT_AFTER);
 491         g_signal_connect_swapped (G_OBJECT (priv->swindow), "size-allocate",
 492                                   G_CALLBACK (adjustment_changed_cb),
 493                                   ev_sidebar_thumbnails);
 494         gtk_box_pack_start (GTK_BOX (ev_sidebar_thumbnails), priv->swindow, TRUE, TRUE, 0);
 495
 496         /* Put it all together */
 497         gtk_widget_show_all (priv->swindow);
 498 }
 499
 500 static void
 501 page_changed_cb (EvPageCache         *page_cache,
 502                  int                  page,
 503                  EvSidebarThumbnails *sidebar)
 504 {
 505         GtkTreeView *tree_view;
 506         GtkTreePath *path;
 507
 508         path = gtk_tree_path_new_from_indices (page, -1);
 509
 510         if (sidebar->priv->tree_view) {
 511                 tree_view = GTK_TREE_VIEW (sidebar->priv->tree_view);
 512                 gtk_tree_view_set_cursor (tree_view, path, NULL, FALSE);
 513                 gtk_tree_view_scroll_to_cell (tree_view, path, NULL, FALSE, 0.0, 0.0);
 514         } else if (sidebar->priv->icon_view) {
 515                 /* Guard against gtk-2.6 */
 516 #ifdef HAVE_GTK_ICON_VIEW_GET_VISIBLE_RANGE
 517                 gtk_icon_view_select_path (GTK_ICON_VIEW (sidebar->priv->icon_view), path);
 518                 gtk_icon_view_set_cursor (GTK_ICON_VIEW (sidebar->priv->icon_view), path, NULL, FALSE);
 519 #endif
 520         }
 521
 522         gtk_tree_path_free (path);
 523 }
 524
 525 static void
 526 thumbnail_job_completed_callback (EvJobThumbnail      *job,
 527                                   EvSidebarThumbnails *sidebar_thumbnails)
 528 {
 529         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 530         GtkTreeIter *iter;
 531
 532         iter = (GtkTreeIter *) g_object_get_data (G_OBJECT (job), "tree_iter");
 533         gtk_list_store_set (priv->list_store,
 534                             iter,
 535                             COLUMN_PIXBUF, job->thumbnail,
 536                             COLUMN_THUMBNAIL_SET, TRUE,
 537                             COLUMN_JOB, NULL,
 538                             -1);
 539 }
 540
 541 static void
 542 ev_sidebar_thumbnails_set_document (EvSidebarPage       *sidebar_page,
 543                                     EvDocument          *document)
 544 {
 545         EvSidebarThumbnails *sidebar_thumbnails = EV_SIDEBAR_THUMBNAILS (sidebar_page);
 546         gint width = THUMBNAIL_WIDTH;
 547         gint height = THUMBNAIL_WIDTH;
 548
 549         EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 550
 551         g_return_if_fail (EV_IS_DOCUMENT_THUMBNAILS (document));
 552
 553         priv->page_cache = ev_page_cache_get (document);
 554         priv->document = document;
 555         priv->n_pages = ev_page_cache_get_n_pages (priv->page_cache);
 556
 557         /* We get the dimensions of the first doc so that we can make a blank
 558          * icon.  */
 559         ev_document_doc_mutex_lock ();
 560         ev_document_thumbnails_get_dimensions (EV_DOCUMENT_THUMBNAILS (priv->document),
 561                                                0, THUMBNAIL_WIDTH, &width, &height);
 562         ev_document_doc_mutex_unlock ();
 563
 564         if (priv->loading_icon)
 565                 g_object_unref (priv->loading_icon);
 566         priv->loading_icon = ev_document_misc_get_thumbnail_frame (width, height, NULL);
 567
 568         ev_sidebar_thumbnails_clear_model (sidebar_thumbnails);
 569         ev_sidebar_thumbnails_fill_model (sidebar_thumbnails);
 570
 571         /* Create the view widget, and remove the old one, if needed */
 572         if (ev_sidebar_thumbnails_use_icon_view (sidebar_thumbnails)) {
 573                 if (priv->tree_view) {
 574                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->tree_view);
 575                         priv->tree_view = NULL;
 576                 }
 577
 578                 if (! priv->icon_view) {
 579                         ev_sidebar_init_icon_view (sidebar_thumbnails);
 580                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 581                 }
 582         } else {
 583                 if (priv->icon_view) {
 584                         gtk_container_remove (GTK_CONTAINER (priv->swindow), priv->icon_view);
 585                         priv->icon_view = NULL;
 586                 }
 587
 588                 if (! priv->tree_view) {
 589                         ev_sidebar_init_tree_view (sidebar_thumbnails);
 590                         g_object_notify (G_OBJECT (sidebar_thumbnails), "main_widget");
 591                 }
 592         }
 593
 594         /* Connect to the signal and trigger a fake callback */
 595         g_signal_connect (priv->page_cache, "page-changed", G_CALLBACK (page_changed_cb), sidebar_thumbnails);
 596         adjustment_changed_cb (sidebar_thumbnails);
 597 }
 598
 599 static gboolean
 600 ev_sidebar_thumbnails_clear_job (GtkTreeModel *model,
 601                                  GtkTreePath *path,
 602                                  GtkTreeIter *iter,
 603                                  gpointer data)
 604 {
 605     EvJob *job;
 606
 607     gtk_tree_model_get (model, iter, COLUMN_JOB, &job, -1);
 608
 609     if (job != NULL) {
 610         ev_job_queue_remove_job (job);
 611         g_signal_handlers_disconnect_by_func (job, thumbnail_job_completed_callback, data);
 612         g_object_unref (job);
 613     }
 614
 615     return FALSE;
 616 }
 617
 618 static void
 619 ev_sidebar_thumbnails_clear_model (EvSidebarThumbnails *sidebar_thumbnails)
 620 {
 621     EvSidebarThumbnailsPrivate *priv = sidebar_thumbnails->priv;
 622
 623     gtk_tree_model_foreach (GTK_TREE_MODEL (priv->list_store), ev_sidebar_thumbnails_clear_job, sidebar_thumbnails);
 624     gtk_list_store_clear (priv->list_store);
 625 }
 626
 627 static gboolean
 628 ev_sidebar_thumbnails_support_document (EvSidebarPage   *sidebar_page,
 629                                         EvDocument *document)
 630 {
 631         return (EV_IS_DOCUMENT_THUMBNAILS (document) &&
 632                     (ev_document_get_n_pages (document) > 1));
 633 }
 634
 635 static const gchar*
 636 ev_sidebar_thumbnails_get_label (EvSidebarPage *sidebar_page)
 637 {
 638     return _("Thumbnails");
 639 }
 640
 641 static void
 642 ev_sidebar_thumbnails_page_iface_init (EvSidebarPageIface *iface)
 643 {
 644         iface->support_document = ev_sidebar_thumbnails_support_document;
 645         iface->set_document = ev_sidebar_thumbnails_set_document;
 646         iface->get_label = ev_sidebar_thumbnails_get_label;
 647 }
 648