* all:
[modest] / src / widgets / modest-folder-view.c
index f2c3466..2c2aa73 100644 (file)
 #include <glib/gi18n.h>
 #include <string.h>
 
-#include <tny-account-tree-model.h>
-#include <tny-account-store-iface.h>
-#include <tny-account-iface.h>
-#include <tny-msg-folder-iface.h>
-#include <tny-summary-window-iface.h>
+#include <tny-account-store-view.h>
+#include <tny-gtk-account-list-model.h>
+#include <tny-gtk-folder-store-tree-model.h>
+#include <tny-gtk-header-list-model.h>
+#include <tny-folder.h>
+#include <tny-folder-monitor.h>
+#include <tny-account-store.h>
+#include <tny-account.h>
+#include <tny-folder.h>
+#include <tny-camel-folder.h>
+#include <tny-simple-list.h>
+#include <modest-tny-folder.h>
+#include <modest-marshal.h>
 #include <modest-icon-names.h>
-#include <modest-icon-factory.h>
 #include <modest-tny-account-store.h>
-
+#include <modest-text-utils.h>
+#include <modest-runtime.h>
 #include "modest-folder-view.h"
 
-
 /* 'private'/'protected' functions */
 static void modest_folder_view_class_init  (ModestFolderViewClass *klass);
 static void modest_folder_view_init        (ModestFolderView *obj);
 static void modest_folder_view_finalize    (GObject *obj);
 
-static gboolean update_model (ModestFolderView *self,
-                             ModestTnyAccountStore *account_store);
-static gboolean update_model_empty (ModestFolderView *self);
-static void on_selection_changed (GtkTreeSelection *sel, gpointer data);
-static gboolean modest_folder_view_update_model (ModestFolderView *self,
-                                                TnyAccountStoreIface *account_store);
+static void         tny_account_store_view_init (gpointer g, 
+                                                gpointer iface_data);
+
+static void         modest_folder_view_set_account_store (TnyAccountStoreView *self, 
+                                                         TnyAccountStore     *account_store);
+
+static gboolean     update_model           (ModestFolderView *self,
+                                           ModestTnyAccountStore *account_store);
+
+static gboolean     update_model_empty     (ModestFolderView *self);
+
+static void         on_selection_changed   (GtkTreeSelection *sel, gpointer data);
+
+static void         on_account_update      (TnyAccountStore *account_store, 
+                                           const gchar *account,
+                                           gpointer user_data);
+
+static gint         cmp_rows               (GtkTreeModel *tree_model, 
+                                           GtkTreeIter *iter1, 
+                                           GtkTreeIter *iter2,
+                                           gpointer user_data);
+
+/* DnD functions */
+static void         on_drag_data_get       (GtkWidget *widget, 
+                                           GdkDragContext *context, 
+                                           GtkSelectionData *selection_data, 
+                                           guint info, 
+                                           guint time, 
+                                           gpointer data);
+
+static void         on_drag_data_received  (GtkWidget *widget, 
+                                           GdkDragContext *context, 
+                                           gint x, 
+                                           gint y, 
+                                           GtkSelectionData *selection_data, 
+                                           guint info, 
+                                           guint time, 
+                                           gpointer data);
+
+static gboolean     on_drag_motion         (GtkWidget      *widget,
+                                           GdkDragContext *context,
+                                           gint            x,
+                                           gint            y,
+                                           guint           time,
+                                           gpointer        user_data);
+
+static gint         expand_row_timeout     (gpointer data);
+
+static void         setup_drag_and_drop    (GtkTreeView *self);
 
 enum {
-       FOLDER_SELECTED_SIGNAL,
+       TARGET_TREE_ROW,
+};
+
+static const GtkTargetEntry drag_types[] =
+{
+       { "GTK_TREE_MODEL_ROW", GTK_TARGET_SAME_WIDGET, TARGET_TREE_ROW },
+};
+
+#define ROW_REF_DATA_NAME "row-ref"
+
+enum {
+       FOLDER_SELECTION_CHANGED_SIGNAL,
+       FOLDER_MOVED_SIGNAL,
        LAST_SIGNAL
 };
 
 typedef struct _ModestFolderViewPrivate ModestFolderViewPrivate;
 struct _ModestFolderViewPrivate {
-
-       TnyAccountStoreIface *account_store;
-       TnyMsgFolderIface    *cur_folder;
-       gboolean             view_is_empty;
+       TnyAccountStore     *account_store;
+       TnyFolder           *cur_folder;
+       GtkTreeRowReference *cur_row;
 
        gulong               sig1, sig2;
-       GMutex               *lock;
+       GMutex              *lock;
+       
+       GtkTreeSelection    *cur_selection;
+       TnyFolderStoreQuery *query;
+       guint                timer_expander;
+
+       TnyFolderMonitor    *monitor;
 };
-#define MODEST_FOLDER_VIEW_GET_PRIVATE(o)                              \
-       (G_TYPE_INSTANCE_GET_PRIVATE((o),                               \
-                                    MODEST_TYPE_FOLDER_VIEW,           \
+#define MODEST_FOLDER_VIEW_GET_PRIVATE(o)                      \
+       (G_TYPE_INSTANCE_GET_PRIVATE((o),                       \
+                                    MODEST_TYPE_FOLDER_VIEW,   \
                                     ModestFolderViewPrivate))
 /* globals */
 static GObjectClass *parent_class = NULL;
@@ -93,11 +160,23 @@ modest_folder_view_get_type (void)
                        sizeof(ModestFolderView),
                        1,              /* n_preallocs */
                        (GInstanceInitFunc) modest_folder_view_init,
+                       NULL
                };
+
+               static const GInterfaceInfo tny_account_store_view_info = {
+                       (GInterfaceInitFunc) tny_account_store_view_init, /* interface_init */
+                       NULL,         /* interface_finalize */
+                       NULL          /* interface_data */
+               };
+
                                
                my_type = g_type_register_static (GTK_TYPE_TREE_VIEW,
                                                  "ModestFolderView",
-                                                 &my_info, 0);         
+                                                 &my_info, 0);
+
+               g_type_add_interface_static (my_type, 
+                                            TNY_TYPE_ACCOUNT_STORE_VIEW, 
+                                            &tny_account_store_view_info);
        }
        return my_type;
 }
@@ -116,34 +195,79 @@ modest_folder_view_class_init (ModestFolderViewClass *klass)
        g_type_class_add_private (gobject_class,
                                  sizeof(ModestFolderViewPrivate));
        
-       signals[FOLDER_SELECTED_SIGNAL] = 
-               g_signal_new ("folder_selected",
+       signals[FOLDER_SELECTION_CHANGED_SIGNAL] = 
+               g_signal_new ("folder_selection_changed",
                              G_TYPE_FROM_CLASS (gobject_class),
                              G_SIGNAL_RUN_FIRST,
                              G_STRUCT_OFFSET (ModestFolderViewClass,
-                                              folder_selected),
+                                              folder_selection_changed),
                              NULL, NULL,
-                             g_cclosure_marshal_VOID__POINTER,
-                             G_TYPE_NONE, 1, G_TYPE_POINTER); 
+                             modest_marshal_VOID__POINTER_BOOLEAN,
+                             G_TYPE_NONE, 2, G_TYPE_POINTER, G_TYPE_BOOLEAN);
+
+       /**
+        * ModestFolderView::folder-moved
+        * @self: the #MailOperation that emits the signal
+        * @folder: the #TnyFolder that is going to be moved
+        * @parent: then #TnyFolderStore that is going to be the new parent
+        * @done: indicates if the folder move was correctly completed or not
+        * @user_data: user data set when the signal handler was connected
+        *
+        * Emitted when a the user wants to move a folder through a
+        * drag and drop action
+        */
+       signals[FOLDER_MOVED_SIGNAL] = 
+               g_signal_new ("folder_moved",
+                             G_TYPE_FROM_CLASS (gobject_class),
+                             G_SIGNAL_RUN_FIRST,
+                             G_STRUCT_OFFSET (ModestFolderViewClass, folder_moved),
+                             NULL, NULL,
+                             modest_marshal_VOID__POINTER_POINTER_POINTER,
+                             G_TYPE_NONE, 3, G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_POINTER);
 }
 
 
 
 static void
 text_cell_data  (GtkTreeViewColumn *column,  GtkCellRenderer *renderer,
-                  GtkTreeModel *tree_model,  GtkTreeIter *iter,  gpointer data)
+                GtkTreeModel *tree_model,  GtkTreeIter *iter,  gpointer data)
 {
        GObject *rendobj;
        gchar *fname;
        gint unread;
-       TnyMsgFolderType type;
+       TnyFolderType type;
+       TnyFolder *folder;
        
+       g_return_if_fail (column);
+       g_return_if_fail (tree_model);
+
        gtk_tree_model_get (tree_model, iter,
-                           TNY_ACCOUNT_TREE_MODEL_NAME_COLUMN, &fname,
-                           TNY_ACCOUNT_TREE_MODEL_TYPE_COLUMN, &type,
-                           TNY_ACCOUNT_TREE_MODEL_UNREAD_COLUMN, &unread, -1);
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, &fname,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_UNREAD_COLUMN, &unread,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN, &type,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, &folder,
+                           -1);
        rendobj = G_OBJECT(renderer);
 
+       if (!fname)
+               return;
+       
+       if (folder && type != TNY_FOLDER_TYPE_ROOT) { /* FIXME: tnymail bug? crashes with root folders */
+               if (modest_tny_folder_is_local_folder (folder)) {
+                       TnyFolderType type;
+                       type = modest_tny_folder_get_local_folder_type (folder);
+                       if (type != TNY_FOLDER_TYPE_UNKNOWN) {
+                               g_free (fname);
+                               fname = g_strdup(modest_local_folder_info_get_type_display_name (type));
+                       }
+               }
+       } else if (folder && type == TNY_FOLDER_TYPE_ROOT) {
+               if (strcmp (fname, MODEST_LOCAL_FOLDERS_ACCOUNT_NAME) == 0) {/* FIXME: hack */
+                       g_free (fname);
+                       fname = g_strdup (MODEST_LOCAL_FOLDERS_DISPLAY_NAME);
+               }
+       }
+                       
        if (unread > 0) {
                gchar *folder_title = g_strdup_printf ("%s (%d)", fname, unread);
                g_object_set (rendobj,"text", folder_title,  "weight", 800, NULL);
@@ -152,60 +276,39 @@ text_cell_data  (GtkTreeViewColumn *column,  GtkCellRenderer *renderer,
                g_object_set (rendobj,"text", fname, "weight", 400, NULL);
                
        g_free (fname);
+       if (folder)
+               g_object_unref (G_OBJECT(folder));
+       
 }
 
-/* FIXME: move these to TnyMail */
-enum {
 
-       TNY_MSG_FOLDER_TYPE_NOTES = TNY_MSG_FOLDER_TYPE_SENT + 1, /* urgh */
-       TNY_MSG_FOLDER_TYPE_DRAFTS,
-       TNY_MSG_FOLDER_TYPE_CONTACTS,
-       TNY_MSG_FOLDER_TYPE_CALENDAR
-};
-       
-static TnyMsgFolderType
-guess_folder_type (const gchar* name)
+static GdkPixbuf*
+get_cached_icon (const gchar *name)
 {
-       TnyMsgFolderType type;
-       gchar *folder;
-
-       g_return_val_if_fail (name, TNY_MSG_FOLDER_TYPE_NORMAL);
-       
-       type = TNY_MSG_FOLDER_TYPE_NORMAL;
-       folder = g_utf8_strdown (name, strlen(name));
-
-       if (strcmp (folder, "inbox") == 0 ||
-           strcmp (folder, _("inbox")) == 0)
-               type = TNY_MSG_FOLDER_TYPE_INBOX;
-       else if (strcmp (folder, "outbox") == 0 ||
-                strcmp (folder, _("outbox")) == 0)
-               type = TNY_MSG_FOLDER_TYPE_OUTBOX;
-       else if (g_str_has_prefix(folder, "junk") ||
-                g_str_has_prefix(folder, _("junk")))
-               type = TNY_MSG_FOLDER_TYPE_JUNK;
-       else if (g_str_has_prefix(folder, "trash") ||
-                g_str_has_prefix(folder, _("trash")))
-               type = TNY_MSG_FOLDER_TYPE_JUNK;
-       else if (g_str_has_prefix(folder, "sent") ||
-                g_str_has_prefix(folder, _("sent")))
-               type = TNY_MSG_FOLDER_TYPE_SENT;
-
-       /* these are not *really* TNY_ types */
-       else if (g_str_has_prefix(folder, "draft") ||
-                g_str_has_prefix(folder, _("draft")))
-               type = TNY_MSG_FOLDER_TYPE_DRAFTS;
-       else if (g_str_has_prefix(folder, "notes") ||
-                g_str_has_prefix(folder, _("notes")))
-               type = TNY_MSG_FOLDER_TYPE_NOTES;
-       else if (g_str_has_prefix(folder, "contacts") ||
-                g_str_has_prefix(folder, _("contacts")))
-               type = TNY_MSG_FOLDER_TYPE_CONTACTS;
-       else if (g_str_has_prefix(folder, "calendar") ||
-                g_str_has_prefix(folder, _("calendar")))
-               type = TNY_MSG_FOLDER_TYPE_CALENDAR;
-       
-       g_free (folder);
-       return type;
+       GError *err = NULL;
+       gpointer pixbuf;
+       gpointer orig_key;
+       static GHashTable *icon_cache = NULL;
+       
+       g_return_val_if_fail (name, NULL);
+
+       if (G_UNLIKELY(!icon_cache))
+               icon_cache = modest_cache_mgr_get_cache (modest_runtime_get_cache_mgr(),
+                                                        MODEST_CACHE_MGR_CACHE_TYPE_PIXBUF);
+       
+       if (!icon_cache || !g_hash_table_lookup_extended (icon_cache, name, &orig_key, &pixbuf)) {
+               pixbuf = (gpointer)gdk_pixbuf_new_from_file (name, &err);
+               if (!pixbuf) {
+                       g_printerr ("modest: error in icon factory while loading '%s': %s\n",
+                                   name, err->message);
+                       g_error_free (err);
+               }
+               /* if we cannot find it, we still insert (if we have a cache), so we get the error
+                * only once */
+               if (icon_cache)
+                       g_hash_table_insert (icon_cache, g_strdup(name),(gpointer)pixbuf);
+       }
+       return GDK_PIXBUF(pixbuf);
 }
 
 
@@ -215,61 +318,59 @@ icon_cell_data  (GtkTreeViewColumn *column,  GtkCellRenderer *renderer,
 {
        GObject *rendobj;
        GdkPixbuf *pixbuf;
-       TnyMsgFolderType type;
+       TnyFolderType type;
        gchar *fname = NULL;
        gint unread;
        
        rendobj = G_OBJECT(renderer);
        gtk_tree_model_get (tree_model, iter,
-                           TNY_ACCOUNT_TREE_MODEL_TYPE_COLUMN, &type,
-                           TNY_ACCOUNT_TREE_MODEL_NAME_COLUMN, &fname,
-                           TNY_ACCOUNT_TREE_MODEL_UNREAD_COLUMN, &unread, -1);
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN, &type,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, &fname,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_UNREAD_COLUMN, &unread, -1);
        rendobj = G_OBJECT(renderer);
        
-       if (type == TNY_MSG_FOLDER_TYPE_NORMAL)
-               type = guess_folder_type (fname);
-       
-       if (fname);
-               g_free (fname);
+       if (type == TNY_FOLDER_TYPE_NORMAL || type == TNY_FOLDER_TYPE_UNKNOWN) {
+               type = modest_tny_folder_guess_folder_type_from_name (fname);
+       }
+       g_free (fname);
 
        switch (type) {
-        case TNY_MSG_FOLDER_TYPE_INBOX:
-                pixbuf = modest_icon_factory_get_icon (MODEST_FOLDER_ICON_INBOX);
+       case TNY_FOLDER_TYPE_ROOT:
+               pixbuf = get_cached_icon (MODEST_FOLDER_ICON_ACCOUNT);
                 break;
-        case TNY_MSG_FOLDER_TYPE_OUTBOX:
-                pixbuf = modest_icon_factory_get_icon (MODEST_FOLDER_ICON_OUTBOX);
+       case TNY_FOLDER_TYPE_INBOX:
+                pixbuf = get_cached_icon (MODEST_FOLDER_ICON_INBOX);
                 break;
-        case TNY_MSG_FOLDER_TYPE_JUNK:
-                pixbuf = modest_icon_factory_get_icon (MODEST_FOLDER_ICON_JUNK);
+        case TNY_FOLDER_TYPE_OUTBOX:
+                pixbuf = get_cached_icon (MODEST_FOLDER_ICON_OUTBOX);
                 break;
-        case TNY_MSG_FOLDER_TYPE_SENT:
-                pixbuf = modest_icon_factory_get_icon (MODEST_FOLDER_ICON_SENT);
+        case TNY_FOLDER_TYPE_JUNK:
+                pixbuf = get_cached_icon (MODEST_FOLDER_ICON_JUNK);
                 break;
-       case TNY_MSG_FOLDER_TYPE_DRAFTS:
-               pixbuf = modest_icon_factory_get_icon (MODEST_FOLDER_ICON_DRAFTS);
+        case TNY_FOLDER_TYPE_SENT:
+                pixbuf = get_cached_icon (MODEST_FOLDER_ICON_SENT);
                 break;
-       case TNY_MSG_FOLDER_TYPE_NOTES:
-               pixbuf = modest_icon_factory_get_icon (MODEST_FOLDER_ICON_NOTES);
+       case TNY_FOLDER_TYPE_TRASH:
+               pixbuf = get_cached_icon (MODEST_FOLDER_ICON_TRASH);
                 break;
-       case TNY_MSG_FOLDER_TYPE_CALENDAR:
-               pixbuf = modest_icon_factory_get_icon (MODEST_FOLDER_ICON_CALENDAR);
+       case TNY_FOLDER_TYPE_DRAFTS:
+               pixbuf = get_cached_icon (MODEST_FOLDER_ICON_DRAFTS);
                 break;
-       case TNY_MSG_FOLDER_TYPE_CONTACTS:
-                pixbuf = modest_icon_factory_get_icon (MODEST_FOLDER_ICON_CONTACTS);
+       case TNY_FOLDER_TYPE_NOTES:
+               pixbuf = get_cached_icon (MODEST_FOLDER_ICON_NOTES);
                 break;
-       case TNY_MSG_FOLDER_TYPE_NORMAL:
-        default:
-                pixbuf = modest_icon_factory_get_icon (MODEST_FOLDER_ICON_NORMAL);
+       case TNY_FOLDER_TYPE_CALENDAR:
+               pixbuf = get_cached_icon (MODEST_FOLDER_ICON_CALENDAR);
                 break;
+       case TNY_FOLDER_TYPE_CONTACTS:
+                pixbuf = get_cached_icon (MODEST_FOLDER_ICON_CONTACTS);
+                break;
+       case TNY_FOLDER_TYPE_NORMAL:
+        default:
+                pixbuf = get_cached_icon (MODEST_FOLDER_ICON_NORMAL);
+               break;
         }
-
-       g_object_set (rendobj,
-                     "pixbuf-expander-open",
-                     modest_icon_factory_get_icon (MODEST_FOLDER_ICON_OPEN),
-                     "pixbuf-expander-closed",
-                     modest_icon_factory_get_icon (MODEST_FOLDER_ICON_CLOSED),
-                     "pixbuf", pixbuf,
-                     NULL);
+       g_object_set (rendobj, "pixbuf", pixbuf, NULL);
 }
 
 static void
@@ -282,18 +383,17 @@ modest_folder_view_init (ModestFolderView *obj)
        
        priv =  MODEST_FOLDER_VIEW_GET_PRIVATE(obj);
        
-       priv->view_is_empty     = TRUE;
-       priv->account_store = NULL;
-       priv->cur_folder = NULL;
+       priv->timer_expander = 0;
+       priv->account_store  = NULL;
+       priv->cur_folder     = NULL;
+       priv->cur_row        = NULL;
+       priv->query          = NULL;
+       priv->monitor        = NULL;
 
-       priv->lock = g_mutex_new ();
-       
-       column = gtk_tree_view_column_new ();
-       gtk_tree_view_column_set_title (column,
-                                       _("All Mail Folders"));
-       
-       gtk_tree_view_append_column (GTK_TREE_VIEW(obj),
-                                    column);
+       priv->lock           = g_mutex_new ();
+
+       column = gtk_tree_view_column_new ();   
+       gtk_tree_view_append_column (GTK_TREE_VIEW(obj),column);
        
        renderer = gtk_cell_renderer_pixbuf_new();
        gtk_tree_view_column_pack_start (column, renderer, FALSE);
@@ -311,11 +411,21 @@ modest_folder_view_init (ModestFolderView *obj)
        gtk_tree_view_column_set_spacing (column, 2);
        gtk_tree_view_column_set_resizable (column, TRUE);
        gtk_tree_view_column_set_fixed_width (column, TRUE);            
-       gtk_tree_view_set_headers_visible   (GTK_TREE_VIEW(obj), TRUE);
        gtk_tree_view_set_headers_clickable (GTK_TREE_VIEW(obj), FALSE);
+       gtk_tree_view_set_enable_search     (GTK_TREE_VIEW(obj), FALSE);
 
+       setup_drag_and_drop (GTK_TREE_VIEW(obj));
 }
 
+static void
+tny_account_store_view_init (gpointer g, gpointer iface_data)
+{
+       TnyAccountStoreViewIface *klass = (TnyAccountStoreViewIface *)g;
+
+       klass->set_account_store_func = modest_folder_view_set_account_store;
+
+       return;
+}
 
 static void
 modest_folder_view_finalize (GObject *obj)
@@ -326,6 +436,12 @@ modest_folder_view_finalize (GObject *obj)
        g_return_if_fail (obj);
        
        priv =  MODEST_FOLDER_VIEW_GET_PRIVATE(obj);
+
+       if (priv->timer_expander != 0) {
+               g_source_remove (priv->timer_expander);
+               priv->timer_expander = 0;
+       }
+
        if (priv->account_store) {
                g_signal_handler_disconnect (G_OBJECT(priv->account_store),
                                             priv->sig1);
@@ -338,6 +454,11 @@ modest_folder_view_finalize (GObject *obj)
                priv->lock = NULL;
        }
 
+       if (priv->query) {
+               g_object_unref (G_OBJECT (priv->query));
+               priv->query = NULL;
+       }
+
        sel = gtk_tree_view_get_selection (GTK_TREE_VIEW(obj));
        if (sel)
                g_signal_handler_disconnect (G_OBJECT(sel), priv->sig2);
@@ -347,158 +468,773 @@ modest_folder_view_finalize (GObject *obj)
 
 
 static void
-on_account_update (TnyAccountStoreIface *account_store, const gchar *account,
-                  gpointer user_data)
+modest_folder_view_set_account_store (TnyAccountStoreView *self, TnyAccountStore *account_store)
 {
-       update_model_empty (MODEST_FOLDER_VIEW(user_data));
+       ModestFolderViewPrivate *priv;
+       TnyDevice *device;
+
+       g_return_if_fail (MODEST_IS_FOLDER_VIEW (self));
+       g_return_if_fail (TNY_IS_ACCOUNT_STORE (account_store));
+
+       priv = MODEST_FOLDER_VIEW_GET_PRIVATE (self);
+       device = tny_account_store_get_device (account_store);
+
+       if (G_UNLIKELY (priv->account_store)) {
+               TnyDevice *old_device; 
+               
+               old_device = tny_account_store_get_device (priv->account_store);
+
+               if (g_signal_handler_is_connected (G_OBJECT (old_device), priv->sig1))
+                       g_signal_handler_disconnect (G_OBJECT (old_device), 
+                                                    priv->sig1);
+
+               g_object_unref (G_OBJECT (priv->account_store));
+               g_object_unref (G_OBJECT (old_device));
+       }
+
+       priv->account_store = g_object_ref (G_OBJECT (account_store));
+
+       priv->sig1 = g_signal_connect (G_OBJECT(account_store), "account_update",
+                                      G_CALLBACK (on_account_update), self);
        
-       if (!update_model (MODEST_FOLDER_VIEW(user_data), account_store))
+       if (!update_model (MODEST_FOLDER_VIEW (self),
+                          MODEST_TNY_ACCOUNT_STORE (priv->account_store)))
+               g_printerr ("modest: failed to update model\n");
+
+       g_object_unref (G_OBJECT (device));
+}
+
+static void
+on_account_update (TnyAccountStore *account_store, const gchar *account,
+                  gpointer user_data)
+{
+       if (!update_model (MODEST_FOLDER_VIEW(user_data), 
+                          MODEST_TNY_ACCOUNT_STORE(account_store)))
                g_printerr ("modest: failed to update model for changes in '%s'",
                            account);
 }
 
+void
+modest_folder_view_set_title (ModestFolderView *self, const gchar *title)
+{
+       GtkTreeViewColumn *col;
+       
+       g_return_if_fail (self);
+
+       col = gtk_tree_view_get_column (GTK_TREE_VIEW(self), 0);
+       if (!col) {
+               g_printerr ("modest: failed get column for title\n");
+               return;
+       }
+
+       gtk_tree_view_column_set_title (col, title);
+       gtk_tree_view_set_headers_visible (GTK_TREE_VIEW(self),
+                                          title != NULL);
+}
 
 GtkWidget*
-modest_folder_view_new (ModestTnyAccountStore *account_store)
+modest_folder_view_new (TnyFolderStoreQuery *query)
 {
        GObject *self;
        ModestFolderViewPrivate *priv;
        GtkTreeSelection *sel;
        
-       g_return_val_if_fail (account_store, NULL);
-       
-       self = G_OBJECT(g_object_new(MODEST_TYPE_FOLDER_VIEW, NULL));
-       priv = MODEST_FOLDER_VIEW_GET_PRIVATE(self);
-       
-       if (!update_model (MODEST_FOLDER_VIEW(self), TNY_ACCOUNT_STORE_IFACE(account_store)))
-               g_printerr ("modest: failed to update model");
-       
-       priv->sig1 = g_signal_connect (G_OBJECT(account_store), "account_update",
-                                      G_CALLBACK (on_account_update), self);   
+       self = G_OBJECT (g_object_new (MODEST_TYPE_FOLDER_VIEW, NULL));
+       priv = MODEST_FOLDER_VIEW_GET_PRIVATE (self);
+
+       priv->query = g_object_ref (query);
        
        sel = gtk_tree_view_get_selection(GTK_TREE_VIEW(self));
        priv->sig2 = g_signal_connect (sel, "changed",
-                                      G_CALLBACK(on_selection_changed), self);
-                                       
+                                      G_CALLBACK (on_selection_changed), self);
        return GTK_WIDGET(self);
 }
 
 
-
-
 static gboolean
 update_model_empty (ModestFolderView *self)
 {
-       GtkTreeIter  iter;
-       GtkTreeStore *store;
        ModestFolderViewPrivate *priv;
        
        g_return_val_if_fail (self, FALSE);
-       
-       store = gtk_tree_store_new (1, G_TYPE_STRING);
-       gtk_tree_store_append (store, &iter, NULL);
-
-       gtk_tree_store_set (store, &iter, 0,
-                           _("(empty)"), -1);
-
-       gtk_tree_view_set_model (GTK_TREE_VIEW(self),
-                                GTK_TREE_MODEL(store));
-       g_object_unref (store);
-
        priv = MODEST_FOLDER_VIEW_GET_PRIVATE(self);
-       priv->view_is_empty = TRUE;
 
-       g_signal_emit (G_OBJECT(self), signals[FOLDER_SELECTED_SIGNAL], 0,
-                      NULL);
+       g_mutex_lock (priv->lock);
+       {
+               if (priv->monitor) {
+                       tny_folder_monitor_stop (priv->monitor);
+                       g_object_unref(G_OBJECT(priv->monitor));
+                       priv->monitor = NULL;
+               }
+       }
+       g_mutex_unlock (priv->lock);
        
+       g_signal_emit (G_OBJECT(self), signals[FOLDER_SELECTION_CHANGED_SIGNAL], 0,
+                      NULL, TRUE);
        return TRUE;
 }
 
 
+/* this feels dirty; any other way to expand all the root items? */
+static void
+expand_root_items (ModestFolderView *self)
+{
+       GtkTreePath *path;
+       path = gtk_tree_path_new_first ();
+
+       /* all folders should have child items, so.. */
+       while (gtk_tree_view_expand_row (GTK_TREE_VIEW(self), path, FALSE))
+               gtk_tree_path_next (path);
+       
+       gtk_tree_path_free (path);
+}
+
 static gboolean
 update_model (ModestFolderView *self, ModestTnyAccountStore *account_store)
 {
        ModestFolderViewPrivate *priv;
-       TnyListIface     *account_list;
+
+       TnyList          *account_list;
        GtkTreeModel     *model, *sortable;
-       
-       g_return_val_if_fail (account_store, FALSE);
-       
-       priv =  MODEST_FOLDER_VIEW_GET_PRIVATE(self);
 
-       model        = GTK_TREE_MODEL(tny_account_tree_model_new ());
-       account_list = TNY_LIST_IFACE(model);
+       g_return_val_if_fail (account_store, FALSE);
 
-       update_model_empty (self); /* cleanup */
-       priv->view_is_empty = TRUE;
+       priv =  MODEST_FOLDER_VIEW_GET_PRIVATE(self);
        
-       tny_account_store_iface_get_accounts (TNY_ACCOUNT_STORE_IFACE(account_store),
-                                             account_list,
-                                             TNY_ACCOUNT_STORE_IFACE_STORE_ACCOUNTS);
-       if (!account_list) /* no store accounts found */ 
-               return TRUE;
+       /* Notify that there is no folder selected */
+       update_model_empty (self);
        
-       sortable = gtk_tree_model_sort_new_with_model (model);
-       gtk_tree_view_set_model (GTK_TREE_VIEW(self), sortable);
-
-       priv->view_is_empty = FALSE;    
-       g_object_unref (model);
-
+       /* FIXME: the local accounts are not shown when the query
+          selects only the subscribed folders. */
+/*     model        = tny_gtk_folder_store_tree_model_new (TRUE, priv->query); */
+       model        = tny_gtk_folder_store_tree_model_new (TRUE, NULL);
+       account_list = TNY_LIST(model);
+
+       tny_account_store_get_accounts (TNY_ACCOUNT_STORE(account_store),
+                                       account_list,
+                                       TNY_ACCOUNT_STORE_STORE_ACCOUNTS);      
+       if (account_list) {
+               sortable = gtk_tree_model_sort_new_with_model (model);
+               gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE(sortable),
+                                                     TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, 
+                                                     GTK_SORT_ASCENDING);
+               gtk_tree_sortable_set_sort_func (GTK_TREE_SORTABLE (sortable),
+                                                TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN,
+                                                cmp_rows, NULL, NULL);
+
+               /* Set new model */
+               gtk_tree_view_set_model (GTK_TREE_VIEW(self), sortable);
+               expand_root_items (self); /* expand all account folders */
+               g_object_unref (account_list);
+       }
+       
+       //if (model)
+       //      g_object_unref (model);
+               
        return TRUE;
-} 
+}
 
 
 static void
 on_selection_changed (GtkTreeSelection *sel, gpointer user_data)
 {
-       GtkTreeModel            *model;
-       TnyMsgFolderIface       *folder = NULL;
-       GtkTreeIter             iter;
-       ModestFolderView *tree_view;
+       GtkTreeModel            *model_sort, *model;
+       TnyFolder               *folder = NULL;
+       GtkTreeIter             iter, iter_sort;
+       GtkTreePath            *path;
+       ModestFolderView        *tree_view;
        ModestFolderViewPrivate *priv;
+       gint                    type;
 
        g_return_if_fail (sel);
        g_return_if_fail (user_data);
-
+       
        priv = MODEST_FOLDER_VIEW_GET_PRIVATE(user_data);
-
-       /* is_empty means that there is only the 'empty' item */
-       if (priv->view_is_empty)
-               return;
+       priv->cur_selection = sel;
        
        /* folder was _un_selected if true */
-       if (!gtk_tree_selection_get_selected (sel, &model, &iter)) {
-               priv->cur_folder = NULL;
+       if (!gtk_tree_selection_get_selected (sel, &model_sort, &iter_sort)) {
+               priv->cur_folder = NULL; /* FIXME: need this? */
+               priv->cur_row = NULL; /* FIXME: need this? */
                return; 
        }
 
+       model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
+       gtk_tree_model_sort_convert_iter_to_child_iter (GTK_TREE_MODEL_SORT (model_sort),
+                                                       &iter,
+                                                       &iter_sort);
+
        tree_view = MODEST_FOLDER_VIEW (user_data);
 
        gtk_tree_model_get (model, &iter,
-                           TNY_ACCOUNT_TREE_MODEL_INSTANCE_COLUMN,
-                           &folder, -1);
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN, &type,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, &folder,
+                           -1);
 
-       if (priv->cur_folder) 
-               tny_msg_folder_iface_expunge (priv->cur_folder);
+       if (type == TNY_FOLDER_TYPE_ROOT)
+               return;
+       
+       /* emit 2 signals: one for the unselection of the old one,
+        * and one for the selection of the new on */
+       g_signal_emit (G_OBJECT(tree_view), signals[FOLDER_SELECTION_CHANGED_SIGNAL], 0,
+                      priv->cur_folder, FALSE);
+
+       if (priv->cur_folder) {
+/*             tny_folder_sync (priv->cur_folder, TRUE, NULL); /\* FIXME *\/ */
+               gtk_tree_row_reference_free (priv->cur_row);
+       }
        priv->cur_folder = folder;
+       g_signal_emit (G_OBJECT(tree_view), signals[FOLDER_SELECTION_CHANGED_SIGNAL], 0,
+                      folder, TRUE);
+       path = gtk_tree_model_get_path (model_sort, &iter_sort);
+       priv->cur_row = gtk_tree_row_reference_new (model_sort, path);
+       gtk_tree_path_free (path);
+}
 
-       /* folder will not be defined if you click eg. on the root node */
-       if (folder)
-               g_signal_emit (G_OBJECT(tree_view), signals[FOLDER_SELECTED_SIGNAL], 0,
-                              folder);
+gboolean
+modest_folder_view_update_model (ModestFolderView *self, TnyAccountStore *account_store)
+{
+       g_return_val_if_fail (MODEST_IS_FOLDER_VIEW (self), FALSE);
+
+       g_signal_emit (G_OBJECT(self), signals[FOLDER_SELECTION_CHANGED_SIGNAL],
+                      0, NULL, TRUE);
+       
+       return update_model (self, MODEST_TNY_ACCOUNT_STORE(account_store)); /* ugly */
 }
 
+TnyFolder *
+modest_folder_view_get_selected (ModestFolderView *self)
+{
+       ModestFolderViewPrivate *priv;
+
+       g_return_val_if_fail (self, NULL);
+       
+       priv = MODEST_FOLDER_VIEW_GET_PRIVATE(self);
+       if (priv->cur_folder)
+               g_object_ref (priv->cur_folder);
+
+       return priv->cur_folder;
+}
 
 static gboolean
-modest_folder_view_update_model (ModestFolderView *self, TnyAccountStoreIface *account_store)
+get_model_iter (ModestFolderView *self, 
+               GtkTreeModel **model, 
+               GtkTreeIter *iter)
 {
-       gboolean retval;
-       
+       GtkTreeModel *model_sort;
+       GtkTreeIter iter_sort;
+       GtkTreePath *path;
+       ModestFolderViewPrivate *priv;
+
+       priv = MODEST_FOLDER_VIEW_GET_PRIVATE(self);
+
+       if (!priv->cur_folder)
+               return FALSE;
+
+       if (!gtk_tree_row_reference_valid (priv->cur_row))
+               return FALSE;
+
+       model_sort = gtk_tree_view_get_model (GTK_TREE_VIEW (self));
+       *model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
+
+       /* Get path to retrieve iter */
+       path = gtk_tree_row_reference_get_path (priv->cur_row);
+       if (!gtk_tree_model_get_iter (model_sort, &iter_sort, path))
+               return FALSE;
+
+       gtk_tree_model_sort_convert_iter_to_child_iter (GTK_TREE_MODEL_SORT (model_sort),
+                                                       iter,
+                                                       &iter_sort);
+       return TRUE;
+}
+
+gboolean 
+modest_folder_view_rename (ModestFolderView *self)
+{
+       GtkTreeModel *model;
+       GtkTreeIter iter;
+       ModestFolderViewPrivate *priv;
+       gchar *old_name;
+
+       g_return_val_if_fail (MODEST_IS_FOLDER_VIEW (self), FALSE);
+
+       priv = MODEST_FOLDER_VIEW_GET_PRIVATE(self);
+
+       if (!get_model_iter (self, &model, &iter))
+               return FALSE;
+
+       /* Remove old name */
+       gtk_tree_model_get (model, &iter,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, 
+                           &old_name, -1);
+       g_free (old_name);
+               
+       /* Set new name */
+       gtk_tree_store_set (GTK_TREE_STORE (model), &iter,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN,
+                           tny_folder_get_name (priv->cur_folder), -1);
+
+       /* Invalidate selection */
+       g_signal_emit (G_OBJECT(self), signals[FOLDER_SELECTION_CHANGED_SIGNAL], 0,
+                      priv->cur_folder, TRUE);
+
+       return TRUE;
+}
+
+gboolean 
+modest_folder_view_add_subfolder (ModestFolderView *self, TnyFolder *folder)
+{
+       GtkTreeModel *model;
+       GtkTreeIter iter, child;
+
        g_return_val_if_fail (MODEST_IS_FOLDER_VIEW (self), FALSE);
-       retval = update_model (self, MODEST_TNY_ACCOUNT_STORE(account_store)); /* ugly */
 
-       g_signal_emit (G_OBJECT(self), signals[FOLDER_SELECTED_SIGNAL],
-                      0, NULL);
+       if (!get_model_iter (self, &model, &iter))
+               return FALSE;
+
+       /* Append a new child to the folder */
+       gtk_tree_store_append (GTK_TREE_STORE (model), &child, &iter);
+       gtk_tree_store_set (GTK_TREE_STORE (model), &child,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, 
+                           tny_folder_get_name (TNY_FOLDER (folder)),
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_UNREAD_COLUMN, 
+                           tny_folder_get_unread_count (TNY_FOLDER (folder)),
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN,
+                           tny_folder_get_folder_type (TNY_FOLDER (folder)),
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN,
+                           folder, -1);
 
-       return retval;
+       return TRUE;
+}
+
+static gint
+cmp_rows (GtkTreeModel *tree_model, GtkTreeIter *iter1, GtkTreeIter *iter2,
+         gpointer user_data)
+{
+       gint cmp;
+       gchar         *name1, *name2;
+       TnyFolderType type;
+       TnyFolder     *folder1, *folder2;
+       
+       gtk_tree_model_get (tree_model, iter1,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, &name1,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_TYPE_COLUMN, &type,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, &folder1,
+                           -1);
+       gtk_tree_model_get (tree_model, iter2,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_NAME_COLUMN, &name2,
+                           TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, &folder2,
+                           -1);
+
+       /* local_folders should be the last one */
+       if (type == TNY_FOLDER_TYPE_ROOT) {
+               /* the account name is also the name of the root folder
+                * in case of local folders */
+               if (name1 && strcmp (name1, MODEST_LOCAL_FOLDERS_ACCOUNT_NAME) == 0)
+                       cmp = +1;
+               else if (name2 && strcmp (name2, MODEST_LOCAL_FOLDERS_ACCOUNT_NAME) == 0)
+                       cmp = -1;
+               else 
+                       cmp = modest_text_utils_utf8_strcmp (name1, name2, TRUE);
+       } else 
+               cmp = modest_text_utils_utf8_strcmp (name1, name2, TRUE);
+
+       
+       if (folder1)
+               g_object_unref(G_OBJECT(folder1));
+       if (folder2)
+               g_object_unref(G_OBJECT(folder2));
+       
+       g_free (name1);
+       g_free (name2);
+
+       return cmp;     
+}
+
+/*****************************************************************************/
+/*                        DRAG and DROP stuff                                */
+/*****************************************************************************/
+
+/*
+ * This function fills the #GtkSelectionData with the row and the
+ * model that has been dragged. It's called when this widget is a
+ * source for dnd after the event drop happened
+ */
+static void
+on_drag_data_get (GtkWidget *widget, 
+                 GdkDragContext *context, 
+                 GtkSelectionData *selection_data, 
+                 guint info, 
+                 guint time, 
+                 gpointer data)
+{
+       GtkTreeSelection *selection;
+       GtkTreeModel *model_sort, *model;
+       GtkTreeIter iter;
+       GtkTreePath *source_row_sort;
+       GtkTreePath *source_row;
+
+       selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (widget));
+       gtk_tree_selection_get_selected (selection, &model_sort, &iter);
+       source_row_sort = gtk_tree_model_get_path (model_sort, &iter);
+
+       /* Get the unsorted path and model */
+       model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
+       source_row = gtk_tree_model_sort_convert_path_to_child_path (GTK_TREE_MODEL_SORT (model_sort),
+                                                                    source_row_sort);
+
+       gtk_tree_set_row_drag_data (selection_data,
+                                   model,
+                                   source_row);
+
+       gtk_tree_path_free (source_row_sort);
+       gtk_tree_path_free (source_row);
+}
+
+/*
+ * This function receives the data set by the "drag-data-get" signal
+ * handler. This information comes within the #GtkSelectionData. This
+ * function will manage both the drags of folders of the treeview and
+ * drags of headers of the header view widget.
+ */
+static void 
+on_drag_data_received (GtkWidget *widget, 
+                      GdkDragContext *context, 
+                      gint x, 
+                      gint y, 
+                      GtkSelectionData *selection_data, 
+                      guint target_type, 
+                      guint time, 
+                      gpointer data)
+{
+       GtkWidget *source_widget;
+       GtkTreeModel *model_sort, *dest_model, *source_model;
+       GtkTreePath *source_row, *dest_row, *child_dest_row;
+       GtkTreeViewDropPosition pos;
+       gboolean success = FALSE, delete_source = FALSE;
+
+       /* Do not allow further process */
+       g_signal_stop_emission_by_name (widget, "drag-data-received");
+
+       /* Check if the get_data failed */
+       if (selection_data == NULL || selection_data->length < 0)
+               return;
+
+       /* Get the action */
+       if (context->action == GDK_ACTION_MOVE)
+               delete_source = TRUE;
+
+       /* Get the models */
+       source_widget = gtk_drag_get_source_widget (context);
+       model_sort = gtk_tree_view_get_model (GTK_TREE_VIEW (widget));
+
+       gtk_tree_get_row_drag_data (selection_data,
+                                   &source_model,
+                                   &source_row);
+
+       /* Select the destination model */
+       if (source_widget == widget)
+               dest_model = source_model;
+       else
+               dest_model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
+
+
+       /* Get the path to the destination row. Can not call
+          gtk_tree_view_get_drag_dest_row() because the source row
+          it's not selected anymore */
+       gtk_tree_view_get_dest_row_at_pos (GTK_TREE_VIEW (widget),
+                                          x, y,
+                                          &dest_row,
+                                          &pos);
+
+       /* Only allow drops IN other rows */
+       if (!dest_row || 
+           pos == GTK_TREE_VIEW_DROP_BEFORE ||
+           pos == GTK_TREE_VIEW_DROP_AFTER)
+               goto finish;
+
+       /* Get the destination row in the usorted model */
+       child_dest_row = 
+               gtk_tree_model_sort_convert_path_to_child_path (GTK_TREE_MODEL_SORT (model_sort),
+                                                               dest_row);
+       gtk_tree_path_free (dest_row);
+
+       /* Drags from the header view */
+       if ((target_type == TARGET_TREE_ROW) && (source_widget != widget)) {
+
+               /* TODO: do the mail operation */
+
+               success = TRUE;
+       } else {
+               GtkTreeRowReference *source_row_reference;
+               GtkTreeIter parent_iter, iter;
+               TnyFolder *folder;
+               TnyFolderStore *parent_folder;
+               gboolean done;
+
+               /* Check if the drag is possible */
+               if (!gtk_tree_path_compare (source_row, child_dest_row))
+                       goto out;
+
+               if (!gtk_tree_drag_dest_row_drop_possible (GTK_TREE_DRAG_DEST (dest_model),
+                                                          child_dest_row,
+                                                          selection_data))
+                       goto out;
+
+               /* Do the mail operation */
+               gtk_tree_model_get_iter (source_model, &parent_iter, child_dest_row);
+               gtk_tree_model_get_iter (source_model, &iter, source_row);
+               gtk_tree_model_get (source_model, &parent_iter, 
+                                   TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, 
+                                   &parent_folder, -1);
+               gtk_tree_model_get (source_model, &iter, 
+                                   TNY_GTK_FOLDER_STORE_TREE_MODEL_INSTANCE_COLUMN, 
+                                   &folder, -1);
+               
+               g_signal_emit (G_OBJECT (widget), signals[FOLDER_MOVED_SIGNAL], 0,
+                              folder, parent_folder, &done);
+               if (!done)
+                       goto out;
+
+               /* Get a row reference to the source path because the path
+                  could change after the insertion. The gtk_drag_finish() is
+                  not able to delete the source because that, so we have to
+                  do it manually */
+               source_row_reference = gtk_tree_row_reference_new (source_model, source_row);
+               gtk_tree_path_free (source_row);
+
+               /* Insert the dragged row as a child of the dest row */
+               gtk_tree_path_down (child_dest_row);
+               if (gtk_tree_drag_dest_drag_data_received (GTK_TREE_DRAG_DEST (dest_model),
+                                                          child_dest_row,
+                                                          selection_data)) {
+
+                       source_row = gtk_tree_row_reference_get_path (source_row_reference);
+
+                       success = TRUE;
+               }
+               gtk_tree_row_reference_free (source_row_reference);
+               
+               if (folder)
+                       g_object_unref (G_OBJECT(folder));
+               if (parent_folder)
+                       g_object_unref (G_OBJECT(parent_folder));
+               
+       }
+ out:
+       gtk_tree_path_free (child_dest_row);
+
+       /* Save the new path, will be used by the
+          drag-data-delete handler */
+       if (success)
+               g_object_set_data (G_OBJECT (source_widget),
+                                  ROW_REF_DATA_NAME,
+                                  gtk_tree_path_copy (source_row));
+
+ finish:
+       gtk_drag_finish (context, success, (success && delete_source), time);
+}
+
+/*
+ * We define a "drag-drop" signal handler because we do not want to
+ * use the default one, because the default one always calls
+ * gtk_drag_finish and we prefer to do it in the "drag-data-received"
+ * signal handler, because there we have all the information available
+ * to know if the dnd was a success or not.
+ */
+static gboolean
+drag_drop_cb (GtkWidget      *widget,
+             GdkDragContext *context,
+             gint            x,
+             gint            y,
+             guint           time,
+             gpointer        user_data) 
+{
+       if (!context->targets)
+               return FALSE;
+
+       /* Request the data from the source. */
+       gtk_drag_get_data(widget, 
+                         context, 
+                         GDK_POINTER_TO_ATOM (context->targets->data), 
+                         time);
+
+    return TRUE;
+}
+
+/*
+ * This function deletes the data that has been dragged from its
+ * source widget. Since is a function received by the source of the
+ * drag, this function only deletes rows of the folder view
+ * widget. The header view widget will need to define its own one.
+ */
+static void 
+drag_data_delete_cb (GtkWidget      *widget,
+                    GdkDragContext *context,
+                    gpointer        user_data)
+{
+       GtkTreePath *source_row;
+       GtkTreeModel *model_sort, *model;
+
+       /* Clean dest row */
+       gtk_tree_view_set_drag_dest_row (GTK_TREE_VIEW (widget),
+                                        NULL,
+                                        GTK_TREE_VIEW_DROP_BEFORE);
+
+       model_sort = gtk_tree_view_get_model (GTK_TREE_VIEW (widget));
+       model = gtk_tree_model_sort_get_model (GTK_TREE_MODEL_SORT (model_sort));
+       source_row = g_object_steal_data (G_OBJECT (widget), ROW_REF_DATA_NAME);
+
+       /* Delete the source row */
+       gtk_tree_drag_source_drag_data_delete (GTK_TREE_DRAG_SOURCE (model),
+                                              source_row);
+
+       gtk_tree_path_free (source_row);
+}
+
+/*
+ * This function expands a node of a tree view if it's not expanded
+ * yet. Not sure why it needs the threads stuff, but gtk+`example code
+ * does that, so that's why they're here.
+ */
+static gint
+expand_row_timeout (gpointer data)
+{
+       GtkTreeView *tree_view = data;
+       GtkTreePath *dest_path = NULL;
+       GtkTreeViewDropPosition pos;
+       gboolean result = FALSE;
+       
+       GDK_THREADS_ENTER ();
+       
+       gtk_tree_view_get_drag_dest_row (tree_view,
+                                        &dest_path,
+                                        &pos);
+       
+       if (dest_path &&
+           (pos == GTK_TREE_VIEW_DROP_INTO_OR_AFTER ||
+            pos == GTK_TREE_VIEW_DROP_INTO_OR_BEFORE)) {
+               gtk_tree_view_expand_row (tree_view, dest_path, FALSE);
+               gtk_tree_path_free (dest_path);
+       }
+       else {
+               if (dest_path)
+                       gtk_tree_path_free (dest_path);
+               
+               result = TRUE;
+       }
+       
+       GDK_THREADS_LEAVE ();
+
+       return result;
+}
+
+/*
+ * This function is called whenever the pointer is moved over a widget
+ * while dragging some data. It installs a timeout that will expand a
+ * node of the treeview if not expanded yet. This function also calls
+ * gdk_drag_status in order to set the suggested action that will be
+ * used by the "drag-data-received" signal handler to know if we
+ * should do a move or just a copy of the data.
+ */
+static gboolean
+on_drag_motion (GtkWidget      *widget,
+               GdkDragContext *context,
+               gint            x,
+               gint            y,
+               guint           time,
+               gpointer        user_data)  
+{
+       GtkTreeViewDropPosition pos;
+       GtkTreePath *dest_row;
+       ModestFolderViewPrivate *priv;
+       GdkDragAction suggested_action;
+
+       priv = MODEST_FOLDER_VIEW_GET_PRIVATE (widget);
+
+       if (priv->timer_expander != 0) {
+               g_source_remove (priv->timer_expander);
+               priv->timer_expander = 0;
+       }
+
+       gtk_tree_view_get_dest_row_at_pos (GTK_TREE_VIEW (widget),
+                                          x, y,
+                                          &dest_row,
+                                          &pos);
+
+       if (!dest_row)
+               return FALSE;
+
+       /* Expand the selected row after 1/2 second */
+       if (!gtk_tree_view_row_expanded (GTK_TREE_VIEW (widget), dest_row)) {
+               gtk_tree_view_set_drag_dest_row (GTK_TREE_VIEW (widget), dest_row, pos);
+               priv->timer_expander = g_timeout_add (500, expand_row_timeout, widget);
+       }
+       gtk_tree_path_free (dest_row);
+
+       /* Select the desired action. By default we pick MOVE */
+       suggested_action = GDK_ACTION_MOVE;
+
+        if (context->actions == GDK_ACTION_COPY)
+            gdk_drag_status(context, GDK_ACTION_COPY, time);
+       else if (context->actions == GDK_ACTION_MOVE)
+            gdk_drag_status(context, GDK_ACTION_MOVE, time);
+       else if (context->actions & suggested_action)
+            gdk_drag_status(context, suggested_action, time);
+       else
+            gdk_drag_status(context, GDK_ACTION_DEFAULT, time);
+
+       return TRUE;
+}
+
+/*
+ * This function sets the treeview as a source and a target for dnd
+ * events. It also connects all the requirede signals.
+ */
+static void
+setup_drag_and_drop (GtkTreeView *self)
+{
+       /* Set up the folder view as a dnd destination. Set only the
+          highlight flag, otherwise gtk will have a different
+          behaviour */
+       gtk_drag_dest_set (GTK_WIDGET (self),
+                          GTK_DEST_DEFAULT_HIGHLIGHT,
+                          drag_types,
+                          G_N_ELEMENTS (drag_types),
+                          GDK_ACTION_MOVE | GDK_ACTION_COPY);
+
+       gtk_signal_connect(GTK_OBJECT (self),
+                          "drag_data_received",
+                          GTK_SIGNAL_FUNC(on_drag_data_received),
+                          NULL);
+
+
+       /* Set up the treeview as a dnd source */
+       gtk_drag_source_set (GTK_WIDGET (self),
+                            GDK_BUTTON1_MASK,
+                            drag_types,
+                            G_N_ELEMENTS (drag_types),
+                            GDK_ACTION_MOVE | GDK_ACTION_COPY);
+
+       gtk_signal_connect(GTK_OBJECT (self),
+                          "drag_data_delete",
+                          GTK_SIGNAL_FUNC(drag_data_delete_cb),
+                          NULL);
+
+       gtk_signal_connect(GTK_OBJECT (self),
+                          "drag_motion",
+                          GTK_SIGNAL_FUNC(on_drag_motion),
+                          NULL);
+
+
+       gtk_signal_connect(GTK_OBJECT (self),
+                          "drag_data_get",
+                          GTK_SIGNAL_FUNC(on_drag_data_get),
+                          NULL);
+
+       gtk_signal_connect(GTK_OBJECT (self),
+                          "drag_drop",
+                          GTK_SIGNAL_FUNC(drag_drop_cb),
+                          NULL);
 }