Disconnect focus-out callback when xxx2many widget is destroyed

Once destroyed, the linked screen has no view to call set_value on.

issue7259
review36071002

tryton/gui/window/view_form/view/form_gtk/many2many.py

@@ -47,7 +47,7 @@ class Many2Many(Widget):
         self.wid_text = PlaceholderEntry()
         self.wid_text.set_placeholder_text(_('Search'))
         self.wid_text.set_property('width_chars', 13)
-        self.wid_text.connect('focus-out-event', lambda *a: self._focus_out())
+        self.wid_text.connect('focus-out-event', self._focus_out)
         self.focus_out = True
         hbox.pack_start(self.wid_text, expand=True, fill=True)
 
@@ -139,6 +139,7 @@ class Many2Many(Widget):
         return False
 
     def destroy(self):
+        self.wid_text.disconnect_by_func(self._focus_out)
         self.screen.destroy()
 
     def _sig_add(self, *args):

tryton/gui/window/view_form/view/form_gtk/one2many.py

@@ -90,8 +90,7 @@ class One2Many(Widget):
             self.wid_text = PlaceholderEntry()
             self.wid_text.set_placeholder_text(_('Search'))
             self.wid_text.set_property('width_chars', 13)
-            self.wid_text.connect('focus-out-event',
-                lambda *a: self._focus_out())
+            self.wid_text.connect('focus-out-event', self._focus_out)
             hbox.pack_start(self.wid_text, expand=True, fill=True)
 
             if int(self.attrs.get('completion', 1)):
@@ -235,6 +234,8 @@ class One2Many(Widget):
         return False
 
     def destroy(self):
+        if self.attrs.get('add_remove'):
+            self.wid_text.disconnect_by_func(self._focus_out)
         self.screen.destroy()
 
     def _on_activate(self):

tryton/gui/window/view_form/view/form_gtk/widget.py

@@ -86,7 +86,7 @@ class Widget(object):
             self.visible = True
             widget.show()
 
-    def _focus_out(self):
+    def _focus_out(self, *args):
         if not self.field:
             return False
         if not self.visible: