Fix readonly tests when user has only create access

The screen should not be read-only if the user is allowed to create record even
if he is not allowed to modify it. And it is the same for the save button.

issue5479
review20151002

tryton/gui/window/form.py

@@ -332,8 +332,9 @@ class Form(SignalEvent, TabContent):
     def set_buttons_sensitive(self, revision=None):
         if not revision:
             access = common.MODELACCESS[self.model]
-            for button, access_type in [('new', 'create'), ('save', 'write')]:
-                self.buttons[button].props.sensitive = access[access_type]
+            self.buttons['new'].props.sensitive = access['create']
+            self.buttons['save'].props.sensitive = (
+                access['create'] or access['write'])
         else:
             for button in ['new', 'save']:
                 self.buttons[button].props.sensitive = False
@@ -384,7 +385,8 @@ class Form(SignalEvent, TabContent):
         if widget:
             # Called from button so we must save the tree state
             self.screen.save_tree_state()
-        if not common.MODELACCESS[self.model]['write']:
+        if not (common.MODELACCESS[self.model]['write']
+                or common.MODELACCESS[self.model]['create']):
             return
         if self.screen.save_current():
             self.message_info(_('Record saved.'), gtk.MESSAGE_INFO)

tryton/gui/window/view_form/model/group.py

@@ -44,7 +44,8 @@ class Group(SignalEvent, list):
     def readonly(self):
         # Must skip res.user for Preference windows
         if (self._context.get('_datetime')
-                or (not MODELACCESS[self.model_name]['write']
+                or (not (MODELACCESS[self.model_name]['write']
+                        or MODELACCESS[self.model_name]['create'])
                     and not self.skip_model_access)):
             return True
         return self.__readonly

tryton/gui/window/view_form/screen/screen.py

@@ -59,7 +59,8 @@ class Screen(SignalEvent):
         super(Screen, self).__init__()
 
         self.readonly = readonly
-        if not MODELACCESS[model_name]['write']:
+        if not (MODELACCESS[model_name]['write']
+                or MODELACCESS[model_name]['create']):
             self.readonly = True
         self.search_count = 0
         if not row_activate: