show alert and stop action when trying to change priorities with compact allocation

src/files.py

@@ -37,9 +37,11 @@ import gtk
 
 import common
 import dgtk
+import pref
 
 class FilesBaseManager(object):
     def __init__(self, file_store):
+        self.config = pref.Preferences()
         file_glade = gtk.glade.XML(common.get_glade_file("file_tab_menu.glade"), 
                                    domain='deluge')
         self.file_menu = file_glade.get_widget("file_tab_menu")
@@ -90,7 +92,17 @@ class FilesBaseManager(object):
     def file_unselect_all(self, widget):
         self.file_view.get_selection().unselect_all()
 
+    def compact_warning(self, widget):
+        msgBox = gtk.MessageDialog(parent = None, buttons = gtk.BUTTONS_OK, 
+        message_format = (_("File priority can only be set when using full allocation.\nPlease change your preference to disable compact allocation, then remove and readd this torrent.")))
+        msgBox.run()
+        msgBox.destroy()
+
+    
     def priority_clicked(self, widget):
+        if self.config.get("use_compact_storage"):
+            self.compact_warning(widget)
+        else:
             widget_name = widget.get_name()
             priority = {'priority_dont_download': common.PRIORITY_DONT_DOWNLOAD,
                         'priority_normal': common.PRIORITY_NORMAL,