git.maemo.org Git - modest/blob - src/widgets/modest-folder-view.c

   1 /* Copyright (c) 2006, Nokia Corporation
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  * * Redistributions of source code must retain the above copyright
   9  *   notice, this list of conditions and the following disclaimer.
  10  * * Redistributions in binary form must reproduce the above copyright
  11  *   notice, this list of conditions and the following disclaimer in the
  12  *   documentation and/or other materials provided with the distribution.
  13  * * Neither the name of the Nokia Corporation nor the names of its
  14  *   contributors may be used to endorse or promote products derived from
  15  *   this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  18  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  20  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  21  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  25  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  26  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <glib/gi18n.h>
  31 #include <string.h>
  32
  33 #include <tny-account-store-view.h>
  34 #include <tny-gtk-account-list-model.h>
  35 #include <tny-gtk-folder-store-tree-model.h>
  36 #include <tny-gtk-header-list-model.h>
  37 #include <tny-folder.h>
  38 #include <tny-account-store.h>
  39 #include <tny-account.h>
  40 #include <tny-folder.h>
  41 #include <tny-camel-folder.h>
  42 #include <tny-simple-list.h>
  43 #include <modest-tny-folder.h>
  44 #include <modest-marshal.h>
  45 #include <modest-icon-names.h>
  46 #include <modest-tny-account-store.h>
  47 #include <modest-text-utils.h>
  48 #include <modest-runtime.h>
  49 #include "modest-folder-view.h"
  50 #include <modest-dnd.h>
  51
  52 /* 'private'/'protected' functions */
  53 static void modest_folder_view_class_init  (ModestFolderViewClass *klass);
  54 static void modest_folder_view_init        (ModestFolderView *obj);
  55 static void modest_folder_view_finalize    (GObject *obj);
  56
  57 static void         tny_account_store_view_init (gpointer g,
  58                                                  gpointer iface_data);
  59
  60 static void         modest_folder_view_set_account_store (TnyAccountStoreView *self,
  61                                                           TnyAccountStore     *account_store);
  62
  63 static gboolean     update_model           (ModestFolderView *self,
  64                                             ModestTnyAccountStore *account_store);
  65
  66 static void         on_selection_changed   (GtkTreeSelection *sel, gpointer data);
  67
  68 static void         on_account_update      (TnyAccountStore *account_store,
  69                                             const gchar *account,
  70                                             gpointer user_data);
  71
  72 static void         on_accounts_reloaded   (TnyAccountStore *store,
  73                                             gpointer user_data);
  74
  75 static gint         cmp_rows               (GtkTreeModel *tree_model,
  76                                             GtkTreeIter *iter1,
  77                                             GtkTreeIter *iter2,
  78                                             gpointer user_data);
  79
  80 /* DnD functions */
  81 static void         on_drag_data_get       (GtkWidget *widget,
  82                                             GdkDragContext *context,
  83                                             GtkSelectionData *selection_data,
  84                                             guint info,
  85                                             guint time,
  86                                             gpointer data);
  87
  88 static void         on_drag_data_received  (GtkWidget *widget,
  89                                             GdkDragContext *context,
  90                                             gint x,
  91                                             gint y,
  92                                             GtkSelectionData *selection_data,
  93                                             guint info,
  94                                             guint time,
  95                                             gpointer data);
  96
  97 static gboolean     on_drag_motion         (GtkWidget      *widget,
  98                                             GdkDragContext *context,
  99                                             gint            x,
 100                                             gint            y,
 101                                             guint           time,
 102                                             gpointer        user_data);
 103
 104 static gint         expand_row_timeout     (gpointer data);
 105
 106 static void         setup_drag_and_drop    (GtkTreeView *self);
 107
 108 enum {
 109         FOLDER_SELECTION_CHANGED_SIGNAL,
 110         LAST_SIGNAL
 111 };
 112
 113 typedef struct _ModestFolderViewPrivate ModestFolderViewPrivate;
 114 struct _ModestFolderViewPrivate {
 115         TnyAccountStore     *account_store;
 116         TnyFolder           *cur_folder;
 117         GtkTreeRowReference *cur_row;
 118
 119         gulong               account_update_signal;
 120         gulong               changed_signal;
 121         gulong               accounts_reloaded_signal;
 122
 123         GtkTreeSelection    *cur_selection;
 124         TnyFolderStoreQuery *query;
 125         guint                timer_expander;
 126 };
 127 #define MODEST_FOLDER_VIEW_GET_PRIVATE(o)                       \
 128         (G_TYPE_INSTANCE_GET_PRIVATE((o),                       \
 129                                      MODEST_TYPE_FOLDER_VIEW,   \
 130                                      ModestFolderViewPrivate))
 131 /* globals */
 132 static GObjectClass *parent_class = NULL;
 133
 134 static guint signals[LAST_SIGNAL] = {0};
 135
 136 GType
 137 modest_folder_view_get_type (void)
 138 {
 139         static GType my_type = 0;
 140         if (!my_type) {
 141                 static const GTypeInfo my_info = {
 142                         sizeof(ModestFolderViewClass),
 143                         NULL,           /* base init */
 144                         NULL,           /* base finalize */
 145                         (GClassInitFunc) modest_folder_view_class_init,
 146                         NULL,           /* class finalize */
 147                         NULL,           /* class data */
 148                         sizeof(ModestFolderView),
 149                         1,              /* n_preallocs */
 150                         (GInstanceInitFunc) modest_folder_view_init,
 151                         NULL
 152                 };
 153
 154                 static const GInterfaceInfo tny_account_store_view_info = {
 155                         (GInterfaceInitFunc) tny_account_store_view_init, /* interface_init */
 156                         NULL,         /* interface_finalize */
 157                         NULL          /* interface_data */
 158                 };
 159
 160
 161                 my_type = g_type_register_static (GTK_TYPE_TREE_VIEW,
 162                                                   "ModestFolderView",
 163                                                   &my_info, 0);
 164
 165                 g_type_add_interface_static (my_type,
 166                                              TNY_TYPE_ACCOUNT_STORE_VIEW,
 167                                              &tny_account_store_view_info);
 168         }
 169         return my_type;
 170 }
 171
 172 static void
 173 modest_folder_view_class_init (ModestFolderViewClass *klass)
 174 {
 175         GObjectClass *gobject_class;
 176         gobject_class = (GObjectClass*) klass;
 177
 178         parent_class            = g_type_class_peek_parent (klass);
 179         gobject_class->finalize = modest_folder_view_finalize;
 180
 181         g_type_class_add_private (gobject_class,
 182                                   sizeof(ModestFolderViewPrivate));
 183
 184         signals[FOLDER_SELECTION_CHANGED_SIGNAL] =
 185                 g_signal_new ("folder_selection_changed",
 186                               G_TYPE_FROM_CLASS (gobject_class),
 187                               G_SIGNAL_RUN_FIRST,
 188                               G_STRUCT_OFFSET (ModestFolderViewClass,
 189                                                folder_selection_changed),
 190                               NULL, NULL,
 191                               modest_marshal_VOID__POINTER_BOOLEAN,
 192                               G_TYPE_NONE, 2, G_TYPE_POINTER, G_TYPE_BOOLEAN);
 193 }
 194
 195
 196
 197 static void
 198 text_cell_data  (GtkTreeViewColumn *column,  GtkCellRenderer *renderer,
 199                  GtkTreeModel *tree_model,  GtkTreeIter *iter,  gpointer data)
 200 {
 201         GObject *rendobj;
 202         gchar *fname = NULL;
 203         gint unread;
 204         TnyFolderType type;
 205         TnyFolder *folder = NULL;
 206
 207         g_return_if_fail (column);
 208         g_return_if_fail (tree_model);
 209
 210         gtk_tree_model_get (tree_model, iter,
 211                             TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, &fname,
 212                             TNY_GTK_FOLDER_STORE_TREE_MODEL_UNREAD_COLUMN, &unread,
 213                             TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN, &type,
 214                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, &folder,
 215                             -1);
 216         rendobj = G_OBJECT(renderer);
 217
 218         if (!fname)
 219                 return;
 220
 221         if (folder && type != TNY_FOLDER_TYPE_ROOT) { /* FIXME: tnymail bug? crashes with root folders */
 222                 if (modest_tny_folder_is_local_folder (folder)) {
 223                         TnyFolderType type;
 224                         type = modest_tny_folder_get_local_folder_type (folder);
 225                         if (type != TNY_FOLDER_TYPE_UNKNOWN) {
 226                                 g_free (fname);
 227                                 fname = g_strdup(modest_local_folder_info_get_type_display_name (type));
 228                         }
 229                 }
 230         } else if (folder && type == TNY_FOLDER_TYPE_ROOT) {
 231                 /* FIXME: todo */
 232         }
 233
 234         if (unread > 0) {
 235                 gchar *folder_title = g_strdup_printf ("%s (%d)", fname, unread);
 236                 g_object_set (rendobj,"text", folder_title,  "weight", 800, NULL);
 237                 g_free (folder_title);
 238         } else
 239                 g_object_set (rendobj,"text", fname, "weight", 400, NULL);
 240
 241         g_free (fname);
 242         if (folder) g_object_unref (G_OBJECT (folder));
 243 }
 244
 245
 246 static GdkPixbuf*
 247 get_cached_icon (const gchar *name)
 248 {
 249         GError *err = NULL;
 250         gpointer pixbuf;
 251         gpointer orig_key;
 252         static GHashTable *icon_cache = NULL;
 253
 254         g_return_val_if_fail (name, NULL);
 255
 256         if (G_UNLIKELY(!icon_cache))
 257                 icon_cache = modest_cache_mgr_get_cache (modest_runtime_get_cache_mgr(),
 258                                                          MODEST_CACHE_MGR_CACHE_TYPE_PIXBUF);
 259
 260         if (!icon_cache || !g_hash_table_lookup_extended (icon_cache, name, &orig_key, &pixbuf)) {
 261                 pixbuf = (gpointer)gdk_pixbuf_new_from_file (name, &err);
 262                 if (!pixbuf) {
 263                         g_printerr ("modest: error in icon factory while loading '%s': %s\n",
 264                                     name, err->message);
 265                         g_error_free (err);
 266                 }
 267                 /* if we cannot find it, we still insert (if we have a cache), so we get the error
 268                  * only once */
 269                 if (icon_cache)
 270                         g_hash_table_insert (icon_cache, g_strdup(name),(gpointer)pixbuf);
 271         }
 272         return GDK_PIXBUF(pixbuf);
 273 }
 274
 275
 276 static void
 277 icon_cell_data  (GtkTreeViewColumn *column,  GtkCellRenderer *renderer,
 278                  GtkTreeModel *tree_model,  GtkTreeIter *iter, gpointer data)
 279 {
 280         GObject *rendobj;
 281         GdkPixbuf *pixbuf;
 282         TnyFolderType type;
 283         gchar *fname = NULL;
 284         gint unread;
 285
 286         rendobj = G_OBJECT(renderer);
 287         gtk_tree_model_get (tree_model, iter,
 288                             TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN, &type,
 289                             TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, &fname,
 290                             TNY_GTK_FOLDER_STORE_TREE_MODEL_UNREAD_COLUMN, &unread,
 291                             -1);
 292         rendobj = G_OBJECT(renderer);
 293
 294         if (type == TNY_FOLDER_TYPE_NORMAL || type == TNY_FOLDER_TYPE_UNKNOWN) {
 295                 type = modest_tny_folder_guess_folder_type_from_name (fname);
 296         }
 297         g_free (fname);
 298
 299         switch (type) {
 300         case TNY_FOLDER_TYPE_ROOT:
 301                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_ACCOUNT);
 302                 break;
 303         case TNY_FOLDER_TYPE_INBOX:
 304                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_INBOX);
 305                 break;
 306         case TNY_FOLDER_TYPE_OUTBOX:
 307                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_OUTBOX);
 308                 break;
 309         case TNY_FOLDER_TYPE_JUNK:
 310                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_JUNK);
 311                 break;
 312         case TNY_FOLDER_TYPE_SENT:
 313                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_SENT);
 314                 break;
 315         case TNY_FOLDER_TYPE_TRASH:
 316                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_TRASH);
 317                 break;
 318         case TNY_FOLDER_TYPE_DRAFTS:
 319                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_DRAFTS);
 320                 break;
 321         case TNY_FOLDER_TYPE_NOTES:
 322                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_NOTES);
 323                 break;
 324         case TNY_FOLDER_TYPE_CALENDAR:
 325                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_CALENDAR);
 326                 break;
 327         case TNY_FOLDER_TYPE_CONTACTS:
 328                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_CONTACTS);
 329                 break;
 330         case TNY_FOLDER_TYPE_NORMAL:
 331         default:
 332                 pixbuf = get_cached_icon (MODEST_FOLDER_ICON_NORMAL);
 333                 break;
 334         }
 335         g_object_set (rendobj, "pixbuf", pixbuf, NULL);
 336 }
 337
 338 static void
 339 modest_folder_view_init (ModestFolderView *obj)
 340 {
 341         ModestFolderViewPrivate *priv;
 342         GtkTreeViewColumn *column;
 343         GtkCellRenderer *renderer;
 344         GtkTreeSelection *sel;
 345
 346         priv =  MODEST_FOLDER_VIEW_GET_PRIVATE(obj);
 347
 348         priv->timer_expander = 0;
 349         priv->account_store  = NULL;
 350         priv->cur_folder     = NULL;
 351         priv->cur_row        = NULL;
 352         priv->query          = NULL;
 353
 354         column = gtk_tree_view_column_new ();
 355         gtk_tree_view_append_column (GTK_TREE_VIEW(obj),column);
 356
 357         renderer = gtk_cell_renderer_pixbuf_new();
 358         gtk_tree_view_column_pack_start (column, renderer, FALSE);
 359         gtk_tree_view_column_set_cell_data_func(column, renderer,
 360                                                 icon_cell_data, NULL, NULL);
 361
 362         renderer = gtk_cell_renderer_text_new();
 363         gtk_tree_view_column_pack_start (column, renderer, FALSE);
 364         gtk_tree_view_column_set_cell_data_func(column, renderer,
 365                                                 text_cell_data, NULL, NULL);
 366
 367         sel = gtk_tree_view_get_selection (GTK_TREE_VIEW(obj));
 368         gtk_tree_selection_set_mode (sel, GTK_SELECTION_SINGLE);
 369
 370         gtk_tree_view_column_set_spacing (column, 2);
 371         gtk_tree_view_column_set_resizable (column, TRUE);
 372         gtk_tree_view_column_set_fixed_width (column, TRUE);
 373         gtk_tree_view_set_headers_clickable (GTK_TREE_VIEW(obj), FALSE);
 374         gtk_tree_view_set_enable_search     (GTK_TREE_VIEW(obj), FALSE);
 375
 376         setup_drag_and_drop (GTK_TREE_VIEW(obj));
 377 }
 378
 379 static void
 380 tny_account_store_view_init (gpointer g, gpointer iface_data)
 381 {
 382         TnyAccountStoreViewIface *klass = (TnyAccountStoreViewIface *)g;
 383
 384         klass->set_account_store_func = modest_folder_view_set_account_store;
 385
 386         return;
 387 }
 388
 389 static void
 390 modest_folder_view_finalize (GObject *obj)
 391 {
 392         ModestFolderViewPrivate *priv;
 393         GtkTreeSelection    *sel;
 394
 395         g_return_if_fail (obj);
 396
 397         priv =  MODEST_FOLDER_VIEW_GET_PRIVATE(obj);
 398
 399         if (priv->timer_expander != 0) {
 400                 g_source_remove (priv->timer_expander);
 401                 priv->timer_expander = 0;
 402         }
 403
 404         if (priv->account_store) {
 405                 g_signal_handler_disconnect (G_OBJECT(priv->account_store),
 406                                              priv->account_update_signal);
 407                 g_signal_handler_disconnect (G_OBJECT(priv->account_store),
 408                                              priv->accounts_reloaded_signal);
 409                 g_object_unref (G_OBJECT(priv->account_store));
 410                 priv->account_store = NULL;
 411         }
 412
 413         if (priv->query) {
 414                 g_object_unref (G_OBJECT (priv->query));
 415                 priv->query = NULL;
 416         }
 417
 418         sel = gtk_tree_view_get_selection (GTK_TREE_VIEW(obj));
 419         if (sel)
 420                 g_signal_handler_disconnect (G_OBJECT(sel), priv->changed_signal);
 421
 422         G_OBJECT_CLASS(parent_class)->finalize (obj);
 423 }
 424
 425
 426 static void
 427 modest_folder_view_set_account_store (TnyAccountStoreView *self, TnyAccountStore *account_store)
 428 {
 429         ModestFolderViewPrivate *priv;
 430         TnyDevice *device;
 431
 432         g_return_if_fail (MODEST_IS_FOLDER_VIEW (self));
 433         g_return_if_fail (TNY_IS_ACCOUNT_STORE (account_store));
 434
 435         priv = MODEST_FOLDER_VIEW_GET_PRIVATE (self);
 436         device = tny_account_store_get_device (account_store);
 437
 438         if (G_UNLIKELY (priv->account_store)) {
 439
 440                 if (g_signal_handler_is_connected (G_OBJECT (priv->account_store),
 441                                                    priv->account_update_signal))
 442                         g_signal_handler_disconnect (G_OBJECT (priv->account_store),
 443                                                      priv->account_update_signal);
 444                 if (g_signal_handler_is_connected (G_OBJECT (priv->account_store),
 445                                                    priv->accounts_reloaded_signal))
 446                         g_signal_handler_disconnect (G_OBJECT (priv->account_store),
 447                                                      priv->accounts_reloaded_signal);
 448
 449                 g_object_unref (G_OBJECT (priv->account_store));
 450         }
 451
 452         priv->account_store = g_object_ref (G_OBJECT (account_store));
 453
 454         priv->account_update_signal =
 455                 g_signal_connect (G_OBJECT(account_store), "account_update",
 456                                   G_CALLBACK (on_account_update), self);
 457
 458         priv->accounts_reloaded_signal =
 459                 g_signal_connect (G_OBJECT(account_store), "accounts_reloaded",
 460                                   G_CALLBACK (on_accounts_reloaded), self);
 461
 462         if (!update_model (MODEST_FOLDER_VIEW (self),
 463                            MODEST_TNY_ACCOUNT_STORE (priv->account_store)))
 464                 g_printerr ("modest: failed to update model\n");
 465
 466         g_object_unref (G_OBJECT (device));
 467 }
 468
 469 static void
 470 on_account_update (TnyAccountStore *account_store, const gchar *account,
 471                    gpointer user_data)
 472 {
 473         if (!update_model (MODEST_FOLDER_VIEW(user_data),
 474                            MODEST_TNY_ACCOUNT_STORE(account_store)))
 475                 g_printerr ("modest: failed to update model for changes in '%s'",
 476                             account);
 477 }
 478
 479 static void
 480 on_accounts_reloaded   (TnyAccountStore *account_store,
 481                         gpointer user_data)
 482 {
 483         update_model (MODEST_FOLDER_VIEW (user_data),
 484                       MODEST_TNY_ACCOUNT_STORE(account_store));
 485 }
 486
 487 void
 488 modest_folder_view_set_title (ModestFolderView *self, const gchar *title)
 489 {
 490         GtkTreeViewColumn *col;
 491
 492         g_return_if_fail (self);
 493
 494         col = gtk_tree_view_get_column (GTK_TREE_VIEW(self), 0);
 495         if (!col) {
 496                 g_printerr ("modest: failed get column for title\n");
 497                 return;
 498         }
 499
 500         gtk_tree_view_column_set_title (col, title);
 501         gtk_tree_view_set_headers_visible (GTK_TREE_VIEW(self),
 502                                            title != NULL);
 503 }
 504
 505 GtkWidget*
 506 modest_folder_view_new (TnyFolderStoreQuery *query)
 507 {
 508         GObject *self;
 509         ModestFolderViewPrivate *priv;
 510         GtkTreeSelection *sel;
 511
 512         self = G_OBJECT (g_object_new (MODEST_TYPE_FOLDER_VIEW, NULL));
 513         priv = MODEST_FOLDER_VIEW_GET_PRIVATE (self);
 514
 515         priv->query = g_object_ref (query);
 516
 517         sel = gtk_tree_view_get_selection(GTK_TREE_VIEW(self));
 518         priv->changed_signal = g_signal_connect (sel, "changed",
 519                                                  G_CALLBACK (on_selection_changed), self);
 520         return GTK_WIDGET(self);
 521 }
 522
 523 /* this feels dirty; any other way to expand all the root items? */
 524 static void
 525 expand_root_items (ModestFolderView *self)
 526 {
 527         GtkTreePath *path;
 528         path = gtk_tree_path_new_first ();
 529
 530         /* all folders should have child items, so.. */
 531         while (gtk_tree_view_expand_row (GTK_TREE_VIEW(self), path, FALSE))
 532                 gtk_tree_path_next (path);
 533
 534         gtk_tree_path_free (path);
 535 }
 536
 537 static gboolean
 538 update_model (ModestFolderView *self, ModestTnyAccountStore *account_store)
 539 {
 540         ModestFolderViewPrivate *priv;
 541
 542         TnyList          *account_list;
 543         GtkTreeModel     *model, *sortable;
 544
 545         g_return_val_if_fail (account_store, FALSE);
 546
 547         priv =  MODEST_FOLDER_VIEW_GET_PRIVATE(self);
 548
 549         /* Notify that there is no folder selected */
 550         g_signal_emit (G_OBJECT(self),
 551                        signals[FOLDER_SELECTION_CHANGED_SIGNAL], 0,
 552                        NULL, TRUE);
 553
 554         /* FIXME: the local accounts are not shown when the query
 555            selects only the subscribed folders. */
 556 /*      model        = tny_gtk_folder_store_tree_model_new (TRUE, priv->query); */
 557         model        = tny_gtk_folder_store_tree_model_new (TRUE, NULL);
 558         account_list = TNY_LIST(model);
 559
 560         tny_account_store_get_accounts (TNY_ACCOUNT_STORE(account_store),
 561                                         account_list,
 562                                         TNY_ACCOUNT_STORE_STORE_ACCOUNTS);
 563         if (account_list) {
 564                 sortable = gtk_tree_model_sort_new_with_model (model);
 565                 gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE(sortable),
 566                                                       TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN,
 567                                                       GTK_SORT_ASCENDING);
 568                 gtk_tree_sortable_set_sort_func (GTK_TREE_SORTABLE (sortable),
 569                                                  TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN,
 570                                                  cmp_rows, NULL, NULL);
 571
 572                 /* Set new model */
 573                 gtk_tree_view_set_model (GTK_TREE_VIEW(self), sortable);
 574                 expand_root_items (self); /* expand all account folders */
 575                 g_object_unref (account_list);
 576         }
 577
 578         return TRUE;
 579 }
 580
 581
 582 static void
 583 on_selection_changed (GtkTreeSelection *sel, gpointer user_data)
 584 {
 585         GtkTreeModel            *model_sort, *model;
 586         TnyFolder               *folder = NULL;
 587         GtkTreeIter             iter, iter_sort;
 588         GtkTreePath            *path;
 589         ModestFolderView        *tree_view;
 590         ModestFolderViewPrivate *priv;
 591         gint                    type;
 592
 593         g_return_if_fail (sel);
 594         g_return_if_fail (user_data);
 595
 596         priv = MODEST_FOLDER_VIEW_GET_PRIVATE(user_data);
 597         priv->cur_selection = sel;
 598
 599         /* folder was _un_selected if true */
 600         if (!gtk_tree_selection_get_selected (sel, &model_sort, &iter_sort)) {
 601                 priv->cur_folder = NULL; /* FIXME: need this? */
 602                 gtk_tree_row_reference_free (priv->cur_row);
 603                 priv->cur_row = NULL;
 604                 return;
 605         }
 606
 607         model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
 608         gtk_tree_model_sort_convert_iter_to_child_iter (GTK_TREE_MODEL_SORT (model_sort),
 609                                                         &iter,
 610                                                         &iter_sort);
 611
 612         tree_view = MODEST_FOLDER_VIEW (user_data);
 613
 614         gtk_tree_model_get (model, &iter,
 615                             TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN, &type,
 616                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, &folder,
 617                             -1);
 618
 619         if (type == TNY_FOLDER_TYPE_ROOT) {
 620                 g_object_unref (folder);
 621                 return;
 622         }
 623
 624         /* Current folder was unselected */
 625         g_signal_emit (G_OBJECT(tree_view), signals[FOLDER_SELECTION_CHANGED_SIGNAL], 0,
 626                        priv->cur_folder, FALSE);
 627
 628         if (priv->cur_row) {
 629 /*              tny_folder_sync (priv->cur_folder, TRUE, NULL); /\* FIXME *\/ */
 630                 gtk_tree_row_reference_free (priv->cur_row);
 631         }
 632
 633         /* New current references */
 634         path = gtk_tree_model_get_path (model_sort, &iter_sort);
 635         priv->cur_folder = folder;
 636         priv->cur_row = gtk_tree_row_reference_new (model_sort, path);
 637
 638         /* Frees */
 639         gtk_tree_path_free (path);
 640         g_object_unref (G_OBJECT (folder));
 641
 642         /* New folder has been selected */
 643         g_signal_emit (G_OBJECT(tree_view),
 644                        signals[FOLDER_SELECTION_CHANGED_SIGNAL],
 645                        0, folder, TRUE);
 646 }
 647
 648 TnyFolder *
 649 modest_folder_view_get_selected (ModestFolderView *self)
 650 {
 651         ModestFolderViewPrivate *priv;
 652
 653         g_return_val_if_fail (self, NULL);
 654
 655         priv = MODEST_FOLDER_VIEW_GET_PRIVATE(self);
 656         if (priv->cur_folder)
 657                 g_object_ref (priv->cur_folder);
 658
 659         return priv->cur_folder;
 660 }
 661
 662 /* static gboolean */
 663 /* get_model_iter (ModestFolderView *self,  */
 664 /*              GtkTreeModel **model,  */
 665 /*              GtkTreeIter *iter) */
 666 /* { */
 667 /*      GtkTreeModel *model_sort; */
 668 /*      GtkTreeIter iter_sort; */
 669 /*      GtkTreePath *path; */
 670 /*      ModestFolderViewPrivate *priv; */
 671
 672 /*      priv = MODEST_FOLDER_VIEW_GET_PRIVATE(self); */
 673
 674 /*      if (!priv->cur_folder) */
 675 /*              return FALSE; */
 676
 677 /*      if (!gtk_tree_row_reference_valid (priv->cur_row)) */
 678 /*              return FALSE; */
 679
 680 /*      model_sort = gtk_tree_view_get_model (GTK_TREE_VIEW (self)); */
 681 /*      *model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort)); */
 682
 683 /*      /\* Get path to retrieve iter *\/ */
 684 /*      path = gtk_tree_row_reference_get_path (priv->cur_row); */
 685 /*      if (!gtk_tree_model_get_iter (model_sort, &iter_sort, path)) */
 686 /*              return FALSE; */
 687
 688 /*      gtk_tree_model_sort_convert_iter_to_child_iter (GTK_TREE_MODEL_SORT (model_sort), */
 689 /*                                                      iter, */
 690 /*                                                      &iter_sort); */
 691 /*      return TRUE; */
 692 /* } */
 693
 694 static gint
 695 cmp_rows (GtkTreeModel *tree_model, GtkTreeIter *iter1, GtkTreeIter *iter2,
 696           gpointer user_data)
 697 {
 698         gint cmp;
 699         gchar         *name1, *name2;
 700         TnyFolderType type;
 701         TnyFolder     *folder1, *folder2;
 702
 703         gtk_tree_model_get (tree_model, iter1,
 704                             TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, &name1,
 705                             TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN, &type,
 706                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, &folder1,
 707                             -1);
 708         gtk_tree_model_get (tree_model, iter2,
 709                             TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, &name2,
 710                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, &folder2,
 711                             -1);
 712
 713         /* local_folders should be the last one */
 714         if (type == TNY_FOLDER_TYPE_ROOT) {
 715                 /* the account name is also the name of the root folder
 716                  * in case of local folders */
 717                 if (name1 && strcmp (name1, MODEST_LOCAL_FOLDERS_ACCOUNT_NAME) == 0)
 718                         cmp = +1;
 719                 else if (name2 && strcmp (name2, MODEST_LOCAL_FOLDERS_ACCOUNT_NAME) == 0)
 720                         cmp = -1;
 721                 else
 722                         cmp = modest_text_utils_utf8_strcmp (name1, name2, TRUE);
 723         } else
 724                 cmp = modest_text_utils_utf8_strcmp (name1, name2, TRUE);
 725
 726
 727         if (folder1)
 728                 g_object_unref(G_OBJECT(folder1));
 729         if (folder2)
 730                 g_object_unref(G_OBJECT(folder2));
 731
 732         g_free (name1);
 733         g_free (name2);
 734
 735         return cmp;
 736 }
 737
 738 /*****************************************************************************/
 739 /*                        DRAG and DROP stuff                                */
 740 /*****************************************************************************/
 741
 742 /*
 743  * This function fills the #GtkSelectionData with the row and the
 744  * model that has been dragged. It's called when this widget is a
 745  * source for dnd after the event drop happened
 746  */
 747 static void
 748 on_drag_data_get (GtkWidget *widget,
 749                   GdkDragContext *context,
 750                   GtkSelectionData *selection_data,
 751                   guint info,
 752                   guint time,
 753                   gpointer data)
 754 {
 755         GtkTreeSelection *selection;
 756         GtkTreeModel *model_sort, *model;
 757         GtkTreeIter iter;
 758         GtkTreePath *source_row_sort;
 759         GtkTreePath *source_row;
 760
 761         selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (widget));
 762         gtk_tree_selection_get_selected (selection, &model_sort, &iter);
 763         source_row_sort = gtk_tree_model_get_path (model_sort, &iter);
 764
 765         /* Get the unsorted path and model */
 766         model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
 767         source_row = gtk_tree_model_sort_convert_path_to_child_path (GTK_TREE_MODEL_SORT (model_sort),
 768                                                                      source_row_sort);
 769
 770         gtk_tree_set_row_drag_data (selection_data,
 771                                     model,
 772                                     source_row);
 773
 774         gtk_tree_path_free (source_row_sort);
 775         gtk_tree_path_free (source_row);
 776 }
 777
 778 typedef struct _DndHelper {
 779         gboolean delete_source;
 780         GtkWidget *source_widget;
 781         GtkWidget *dest_widget;
 782         GtkTreePath *source_row;
 783         GdkDragContext *context;
 784         guint time;
 785 } DndHelper;
 786
 787
 788 /*
 789  * This function saves the source row in the source widget, will be
 790  * used by the drag-data-delete handler to remove the source row
 791  */
 792 static void
 793 save_and_clean (DndHelper *helper,
 794                 gboolean success)
 795 {
 796         /* Save row data */
 797         if (success && helper->delete_source)
 798                 g_object_set_data (G_OBJECT (helper->source_widget),
 799                                    ROW_REF_DATA_NAME,
 800                                    gtk_tree_path_copy (helper->source_row));
 801
 802         /* Clean dest row */
 803         gtk_tree_view_set_drag_dest_row (GTK_TREE_VIEW (helper->dest_widget),
 804                                          NULL,
 805                                          GTK_TREE_VIEW_DROP_BEFORE);
 806
 807 }
 808
 809 /*
 810  * This function is the callback of the
 811  * modest_mail_operation_xfer_msg() call. We check here if the message
 812  * was correctly asynchronously transfered
 813  */
 814 static void
 815 on_progress_changed (ModestMailOperation *mail_op, gpointer user_data)
 816 {
 817         ModestMailOperationQueue *queue;
 818         gboolean success = FALSE;
 819         DndHelper *helper;
 820
 821         helper = (DndHelper *) user_data;
 822
 823         if (modest_mail_operation_get_status (mail_op) ==
 824             MODEST_MAIL_OPERATION_STATUS_SUCCESS) {
 825                 success = TRUE;
 826         } else {
 827                 const GError *error;
 828                 error = modest_mail_operation_get_error (mail_op);
 829                 g_warning ("Error transferring messages: %s\n", error->message);
 830         }
 831
 832         /* Remove the mail operation */
 833         queue = modest_runtime_get_mail_operation_queue ();
 834         modest_mail_operation_queue_remove (queue, mail_op);
 835         g_object_unref (G_OBJECT (mail_op));
 836
 837         /* Save and clean. HACK: Force success to FALSE in order not
 838            to save data in the source widget */
 839         gtk_tree_path_free (helper->source_row);
 840         save_and_clean (helper, FALSE);
 841
 842         /* Notify the drag source. Never call delete, the monitor will
 843            do the job if needed */
 844         gtk_drag_finish (helper->context, success, FALSE, helper->time);
 845
 846         /* Free the helper */
 847         g_slice_free (DndHelper, helper);
 848 }
 849
 850 /*
 851  * This function is used by drag_data_received_cb to manage drag and
 852  * drop of a header, i.e, and drag from the header view to the folder
 853  * view.
 854  */
 855 static void
 856 drag_and_drop_from_header_view (GtkTreeModel *source_model,
 857                                 GtkTreeModel *dest_model,
 858                                 GtkTreePath  *dest_row,
 859                                 DndHelper    *helper)
 860 {
 861         TnyHeader *header;
 862         TnyFolder *folder;
 863         ModestMailOperationQueue *queue;
 864         ModestMailOperation *mail_op;
 865         gboolean started;
 866         GtkTreeIter source_iter, dest_iter;
 867
 868         /* Get header */
 869         gtk_tree_model_get_iter (source_model, &source_iter, helper->source_row);
 870         gtk_tree_model_get (source_model, &source_iter,
 871                             TNY_GTK_HEADER_LIST_MODEL_INSTANCE_COLUMN,
 872                             &header, -1);
 873
 874         /* Get Folder */
 875         gtk_tree_model_get_iter (dest_model, &dest_iter, dest_row);
 876         gtk_tree_model_get (dest_model, &dest_iter,
 877                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN,
 878                             &folder, -1);
 879
 880         /* Transfer message */
 881         queue = modest_runtime_get_mail_operation_queue ();
 882         mail_op = modest_mail_operation_new ();
 883         started = modest_mail_operation_xfer_msg (mail_op, header,
 884                                                   folder, helper->delete_source);
 885         if (started) {
 886                 g_signal_connect (G_OBJECT (mail_op), "progress_changed",
 887                                   G_CALLBACK (on_progress_changed), helper);
 888                 modest_mail_operation_queue_add (queue, mail_op);
 889         } else {
 890                 const GError *error;
 891                 error = modest_mail_operation_get_error (mail_op);
 892                 if (error)
 893                         g_warning ("Error trying to transfer messages: %s\n",
 894                                    error->message);
 895
 896                 g_slice_free (DndHelper, helper);
 897         }
 898
 899         /* Frees */
 900         g_object_unref (G_OBJECT (mail_op));
 901         g_object_unref (G_OBJECT (header));
 902         g_object_unref (G_OBJECT (folder));
 903 }
 904
 905 /*
 906  * This function is used by drag_data_received_cb to manage drag and
 907  * drop of a folder, i.e, and drag from the folder view to the same
 908  * folder view.
 909  */
 910 static void
 911 drag_and_drop_from_folder_view (GtkTreeModel     *source_model,
 912                                 GtkTreeModel     *dest_model,
 913                                 GtkTreePath      *dest_row,
 914                                 GtkSelectionData *selection_data,
 915                                 DndHelper        *helper)
 916 {
 917         ModestMailOperation *mail_op;
 918         const GError *error;
 919         GtkTreeRowReference *source_row_reference;
 920         GtkTreeIter parent_iter, iter;
 921         TnyFolder *folder, *new_folder;
 922         TnyFolderStore *parent_folder;
 923         gboolean success = FALSE;
 924
 925         /* Check if the drag is possible */
 926         if (!gtk_tree_path_compare (helper->source_row, dest_row))
 927                 goto out;
 928
 929         if (!gtk_tree_drag_dest_row_drop_possible (GTK_TREE_DRAG_DEST (dest_model),
 930                                                    dest_row,
 931                                                    selection_data))
 932                 goto out;
 933
 934         /* Get data */
 935         gtk_tree_model_get_iter (source_model, &parent_iter, dest_row);
 936         gtk_tree_model_get_iter (source_model, &iter, helper->source_row);
 937         gtk_tree_model_get (source_model, &parent_iter,
 938                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN,
 939                             &parent_folder, -1);
 940         gtk_tree_model_get (source_model, &iter,
 941                             TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN,
 942                             &folder, -1);
 943
 944         /* Do the mail operation */
 945         mail_op = modest_mail_operation_new ();
 946         new_folder = modest_mail_operation_xfer_folder (mail_op, folder, parent_folder,
 947                                                         helper->delete_source);
 948
 949         g_object_unref (G_OBJECT (parent_folder));
 950         g_object_unref (G_OBJECT (folder));
 951
 952         error = modest_mail_operation_get_error (mail_op);
 953         if (error) {
 954                 g_warning ("Error transferring folder: %s\n", error->message);
 955                 g_object_unref (G_OBJECT (mail_op));
 956                 goto out;
 957         }
 958         g_object_unref (G_OBJECT (mail_op));
 959
 960         /* Get a row reference to the source path because the path
 961            could change after the insertion. The gtk_drag_finish() is
 962            not able to delete the source because that, so we have to
 963            do it manually */
 964         source_row_reference = gtk_tree_row_reference_new (source_model, helper->source_row);
 965         gtk_tree_path_free (helper->source_row);
 966
 967         /* Insert the dragged row as a child of the dest row */
 968         gtk_tree_path_down (dest_row);
 969         if (gtk_tree_drag_dest_drag_data_received (GTK_TREE_DRAG_DEST (dest_model),
 970                                                    dest_row,
 971                                                    selection_data)) {
 972
 973                 GtkTreeIter iter;
 974
 975                 /* Set the newly created folder as the instance in the row */
 976                 gtk_tree_model_get_iter (dest_model, &iter, dest_row);
 977                 gtk_tree_store_set (GTK_TREE_STORE (dest_model), &iter,
 978                                     TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN,
 979                                     new_folder, -1);
 980                 g_object_unref (G_OBJECT (new_folder));
 981
 982                 helper->source_row = gtk_tree_row_reference_get_path (source_row_reference);
 983
 984                 success = TRUE;
 985         }
 986         gtk_tree_row_reference_free (source_row_reference);
 987
 988         /* Save and clean */
 989         save_and_clean (helper, success);
 990
 991  out:
 992         gtk_drag_finish (helper->context, success, (success && helper->delete_source), helper->time);
 993 }
 994
 995 /*
 996  * This function receives the data set by the "drag-data-get" signal
 997  * handler. This information comes within the #GtkSelectionData. This
 998  * function will manage both the drags of folders of the treeview and
 999  * drags of headers of the header view widget.
1000  */
1001 static void
1002 on_drag_data_received (GtkWidget *widget,
1003                        GdkDragContext *context,
1004                        gint x,
1005                        gint y,
1006                        GtkSelectionData *selection_data,
1007                        guint target_type,
1008                        guint time,
1009                        gpointer data)
1010 {
1011         GtkWidget *source_widget;
1012         GtkTreeModel *model_sort, *dest_model, *source_model;
1013         GtkTreePath *source_row, *dest_row, *child_dest_row;
1014         GtkTreeViewDropPosition pos;
1015         gboolean success = FALSE, delete_source = FALSE;
1016         DndHelper *helper;
1017
1018         /* Do not allow further process */
1019         g_signal_stop_emission_by_name (widget, "drag-data-received");
1020
1021         /* Get the action */
1022         if (context->action == GDK_ACTION_MOVE)
1023                 delete_source = TRUE;
1024
1025         /* Check if the get_data failed */
1026         if (selection_data == NULL || selection_data->length < 0)
1027                 gtk_drag_finish (context, success, (success && delete_source), time);
1028
1029         /* Get the models */
1030         source_widget = gtk_drag_get_source_widget (context);
1031         gtk_tree_get_row_drag_data (selection_data,
1032                                     &source_model,
1033                                     &source_row);
1034
1035         model_sort = gtk_tree_view_get_model (GTK_TREE_VIEW (widget));
1036         /* Select the destination model */
1037         if (source_widget == widget) {
1038                 dest_model = source_model;
1039         } else {
1040                 dest_model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
1041         }
1042
1043         /* Get the path to the destination row. Can not call
1044            gtk_tree_view_get_drag_dest_row() because the source row
1045            is not selected anymore */
1046         gtk_tree_view_get_dest_row_at_pos (GTK_TREE_VIEW (widget), x, y,
1047                                            &dest_row, &pos);
1048
1049         /* Only allow drops IN other rows */
1050         if (!dest_row || pos == GTK_TREE_VIEW_DROP_BEFORE || pos == GTK_TREE_VIEW_DROP_AFTER)
1051                 gtk_drag_finish (context, success, (success && delete_source), time);
1052
1053         /* Create the helper */
1054         helper = g_slice_new0 (DndHelper);
1055         helper->delete_source = delete_source;
1056         helper->source_widget = source_widget;
1057         helper->dest_widget = widget;
1058         helper->source_row = source_row;
1059         helper->context = context;
1060         helper->time = time;
1061
1062         /* Get path from the unsorted model */
1063         child_dest_row =
1064                 gtk_tree_model_sort_convert_path_to_child_path (GTK_TREE_MODEL_SORT (model_sort),
1065                                                                 dest_row);
1066         gtk_tree_path_free (dest_row);
1067
1068         /* Drags from the header view */
1069         if (source_widget != widget) {
1070
1071                 drag_and_drop_from_header_view (source_model,
1072                                                 dest_model,
1073                                                 child_dest_row,
1074                                                 helper);
1075         } else {
1076
1077
1078                 drag_and_drop_from_folder_view (source_model,
1079                                                 dest_model,
1080                                                 child_dest_row,
1081                                                 selection_data,
1082                                                 helper);
1083         }
1084         gtk_tree_path_free (child_dest_row);
1085 }
1086
1087 /*
1088  * We define a "drag-drop" signal handler because we do not want to
1089  * use the default one, because the default one always calls
1090  * gtk_drag_finish and we prefer to do it in the "drag-data-received"
1091  * signal handler, because there we have all the information available
1092  * to know if the dnd was a success or not.
1093  */
1094 static gboolean
1095 drag_drop_cb (GtkWidget      *widget,
1096               GdkDragContext *context,
1097               gint            x,
1098               gint            y,
1099               guint           time,
1100               gpointer        user_data)
1101 {
1102         gpointer target;
1103
1104         if (!context->targets)
1105                 return FALSE;
1106
1107         /* Check if we're dragging a folder row */
1108         target = gtk_drag_dest_find_target (widget, context, NULL);
1109
1110         /* Request the data from the source. */
1111         gtk_drag_get_data(widget, context, target, time);
1112
1113     return TRUE;
1114 }
1115
1116 /*
1117  * This function deletes the data that has been dragged from its
1118  * source widget. Since is a function received by the source of the
1119  * drag, this function only deletes rows of the folder view
1120  * widget. The header view widget will need to define its own one.
1121  */
1122 static void
1123 drag_data_delete_cb (GtkWidget      *widget,
1124                      GdkDragContext *context,
1125                      gpointer        user_data)
1126 {
1127         GtkTreePath *source_row;
1128         GtkTreeModel *model_sort, *model;
1129
1130         model_sort = gtk_tree_view_get_model (GTK_TREE_VIEW (widget));
1131         model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
1132         source_row = g_object_steal_data (G_OBJECT (widget), ROW_REF_DATA_NAME);
1133
1134         /* Delete the source row */
1135         gtk_tree_drag_source_drag_data_delete (GTK_TREE_DRAG_SOURCE (model),
1136                                                source_row);
1137
1138         gtk_tree_path_free (source_row);
1139 }
1140
1141 /*
1142  * This function expands a node of a tree view if it's not expanded
1143  * yet. Not sure why it needs the threads stuff, but gtk+`example code
1144  * does that, so that's why they're here.
1145  */
1146 static gint
1147 expand_row_timeout (gpointer data)
1148 {
1149         GtkTreeView *tree_view = data;
1150         GtkTreePath *dest_path = NULL;
1151         GtkTreeViewDropPosition pos;
1152         gboolean result = FALSE;
1153
1154         GDK_THREADS_ENTER ();
1155
1156         gtk_tree_view_get_drag_dest_row (tree_view,
1157                                          &dest_path,
1158                                          &pos);
1159
1160         if (dest_path &&
1161             (pos == GTK_TREE_VIEW_DROP_INTO_OR_AFTER ||
1162              pos == GTK_TREE_VIEW_DROP_INTO_OR_BEFORE)) {
1163                 gtk_tree_view_expand_row (tree_view, dest_path, FALSE);
1164                 gtk_tree_path_free (dest_path);
1165         }
1166         else {
1167                 if (dest_path)
1168                         gtk_tree_path_free (dest_path);
1169
1170                 result = TRUE;
1171         }
1172
1173         GDK_THREADS_LEAVE ();
1174
1175         return result;
1176 }
1177
1178 /*
1179  * This function is called whenever the pointer is moved over a widget
1180  * while dragging some data. It installs a timeout that will expand a
1181  * node of the treeview if not expanded yet. This function also calls
1182  * gdk_drag_status in order to set the suggested action that will be
1183  * used by the "drag-data-received" signal handler to know if we
1184  * should do a move or just a copy of the data.
1185  */
1186 static gboolean
1187 on_drag_motion (GtkWidget      *widget,
1188                 GdkDragContext *context,
1189                 gint            x,
1190                 gint            y,
1191                 guint           time,
1192                 gpointer        user_data)
1193 {
1194         GtkTreeViewDropPosition pos;
1195         GtkTreePath *dest_row;
1196         ModestFolderViewPrivate *priv;
1197         GdkDragAction suggested_action;
1198
1199         priv = MODEST_FOLDER_VIEW_GET_PRIVATE (widget);
1200
1201         if (priv->timer_expander != 0) {
1202                 g_source_remove (priv->timer_expander);
1203                 priv->timer_expander = 0;
1204         }
1205
1206         gtk_tree_view_get_dest_row_at_pos (GTK_TREE_VIEW (widget),
1207                                            x, y,
1208                                            &dest_row,
1209                                            &pos);
1210
1211         if (!dest_row)
1212                 return FALSE;
1213
1214         /* Expand the selected row after 1/2 second */
1215         if (!gtk_tree_view_row_expanded (GTK_TREE_VIEW (widget), dest_row)) {
1216                 gtk_tree_view_set_drag_dest_row (GTK_TREE_VIEW (widget), dest_row, pos);
1217                 priv->timer_expander = g_timeout_add (500, expand_row_timeout, widget);
1218         }
1219         gtk_tree_path_free (dest_row);
1220
1221         /* Select the desired action. By default we pick MOVE */
1222         suggested_action = GDK_ACTION_MOVE;
1223
1224         if (context->actions == GDK_ACTION_COPY)
1225             gdk_drag_status(context, GDK_ACTION_COPY, time);
1226         else if (context->actions == GDK_ACTION_MOVE)
1227             gdk_drag_status(context, GDK_ACTION_MOVE, time);
1228         else if (context->actions & suggested_action)
1229             gdk_drag_status(context, suggested_action, time);
1230         else
1231             gdk_drag_status(context, GDK_ACTION_DEFAULT, time);
1232
1233         return TRUE;
1234 }
1235
1236
1237 /* Folder view drag types */
1238 const GtkTargetEntry folder_view_drag_types[] =
1239 {
1240         { "GTK_TREE_MODEL_ROW", GTK_TARGET_SAME_WIDGET, FOLDER_ROW },
1241         { "GTK_TREE_MODEL_ROW", GTK_TARGET_SAME_APP, HEADER_ROW }
1242 };
1243
1244 /*
1245  * This function sets the treeview as a source and a target for dnd
1246  * events. It also connects all the requirede signals.
1247  */
1248 static void
1249 setup_drag_and_drop (GtkTreeView *self)
1250 {
1251         /* Set up the folder view as a dnd destination. Set only the
1252            highlight flag, otherwise gtk will have a different
1253            behaviour */
1254         gtk_drag_dest_set (GTK_WIDGET (self),
1255                            GTK_DEST_DEFAULT_HIGHLIGHT,
1256                            folder_view_drag_types,
1257                            G_N_ELEMENTS (folder_view_drag_types),
1258                            GDK_ACTION_MOVE | GDK_ACTION_COPY);
1259
1260         gtk_signal_connect(GTK_OBJECT (self),
1261                            "drag_data_received",
1262                            GTK_SIGNAL_FUNC(on_drag_data_received),
1263                            NULL);
1264
1265
1266         /* Set up the treeview as a dnd source */
1267         gtk_drag_source_set (GTK_WIDGET (self),
1268                              GDK_BUTTON1_MASK,
1269                              folder_view_drag_types,
1270                              G_N_ELEMENTS (folder_view_drag_types),
1271                              GDK_ACTION_MOVE | GDK_ACTION_COPY);
1272
1273         gtk_signal_connect(GTK_OBJECT (self),
1274                            "drag_data_delete",
1275                            GTK_SIGNAL_FUNC(drag_data_delete_cb),
1276                            NULL);
1277
1278         gtk_signal_connect(GTK_OBJECT (self),
1279                            "drag_motion",
1280                            GTK_SIGNAL_FUNC(on_drag_motion),
1281                            NULL);
1282
1283
1284         gtk_signal_connect(GTK_OBJECT (self),
1285                            "drag_data_get",
1286                            GTK_SIGNAL_FUNC(on_drag_data_get),
1287                            NULL);
1288
1289         gtk_signal_connect(GTK_OBJECT (self),
1290                            "drag_drop",
1291                            GTK_SIGNAL_FUNC(drag_drop_cb),
1292                            NULL);
1293 }