Merge pull request kivy#7774 from kivy/fix_disabled_truthyness

Fix widget.disabled handling of value change of equal truthiness

Author: matham

kivy/tests/test_widget.py

@@ -118,3 +118,10 @@ def test_export_to_png(self):
         rmtree(tmp)
 
         self.root.remove_widget(wid)
+
+    def test_disabled(self):
+        from kivy.uix.widget import Widget
+        w = Widget(disabled=None)
+        w.disabled = False
+        w.disabled = True
+        self.assertEqual(w.disabled, True)

kivy/uix/widget.py

@@ -1433,6 +1433,9 @@ def get_disabled(self):
         return self._disabled_count > 0
 
     def set_disabled(self, value):
+        # Necessary to ensure a change between value of equal truthiness
+        # doesn't mess up the count
+        value = bool(value)
         if value != self._disabled_value:
             self._disabled_value = value
             if value: