[Dextrose] [PATCH v2 sugar] Disable Start menu item for entries that can't be opened(Bug#328)

[Mukul Gupta]

The patch disables the Start and Start With menu items for files
which can't be opened by any installed activity and instead
replace it with a hover dropdown with a menu item 'No activity
installed to start entry'
---
 src/jarabe/journal/palettes.py |   38 +++++++++++++++++++++++---------------
 1 files changed, 23 insertions(+), 15 deletions(-)

v1->v2: Patch remade as per pep8 standards

diff --git a/src/jarabe/journal/palettes.py b/src/jarabe/journal/palettes.py
index 7c3e5ff..2ab93fe 100644
--- a/src/jarabe/journal/palettes.py
+++ b/src/jarabe/journal/palettes.py
@@ -62,22 +62,30 @@ class ObjectPalette(Palette):
         Palette.__init__(self, primary_text=title,
                          icon=activity_icon)
 
-        if metadata.get('activity_id', ''):
-            resume_label = _('Resume')
-            resume_with_label = _('Resume with')
-        else:
-            resume_label = _('Start')
-            resume_with_label = _('Start with')
-        menu_item = MenuItem(resume_label, 'activity-start')
-        menu_item.connect('activate', self.__start_activate_cb)
-        self.menu.append(menu_item)
-        menu_item.show()
+        if misc.get_activities(metadata):
+            if metadata.get('activity_id', ''):
+                resume_label = _('Resume')
+                resume_with_label = _('Resume with')
+            else:
+                resume_label = _('Start')
+                resume_with_label = _('Start with')
+            menu_item = MenuItem(resume_label, 'activity-start')
+            menu_item.connect('activate', self.__start_activate_cb)
+            self.menu.append(menu_item)
+            menu_item.show()
 
-        menu_item = MenuItem(resume_with_label, 'activity-start')
-        self.menu.append(menu_item)
-        menu_item.show()
-        start_with_menu = StartWithMenu(self._metadata)
-        menu_item.set_submenu(start_with_menu)
+            menu_item = MenuItem(resume_with_label, 'activity-start')
+            self.menu.append(menu_item)
+            menu_item.show()
+            start_with_menu = StartWithMenu(self._metadata)
+            menu_item.set_submenu(start_with_menu)
+
+        else:
+            resume_label = _('No activity installed to start entry')
+            menu_item = MenuItem(resume_label)
+            menu_item.set_sensitive(False)
+            self.menu.append(menu_item)
+            menu_item.show()
 
         client = gconf.client_get_default()
         color = XoColor(client.get_string('/desktop/sugar/user/color'))
-- 
1.7.0.4