Updated the imported traits.api.Range in RangeEditorDemo.py with the …

…show_error_dialog attribute set to False in order to avoid that the popup error dialog blocks and eventually makes the TestRangeEditorDemo fail.

traitsui/examples/demo/Standard_Editors/RangeEditor_demo.py

@@ -28,10 +28,42 @@
 .. _RangeEditor API docs: https://docs.enthought.com/traitsui/api/traitsui.editors.range_editor.html#traitsui.editors.range_editor.RangeEditor
 """
 
-from traits.api import HasTraits, Range
+from traits.api import HasTraits, Range as _Range
 from traitsui.api import Item, Group, View
 
 
+# TODO: Update traits.api.Range with the following in order to avoid the popup-error-dialog.
+# TODO: Remove redefinition of Range here once the traits.api.Range is updated.
+class Range(_Range):
+    def create_editor(self):
+        """ Returns the default UI editor for the trait.
+        """
+        # fixme: Needs to support a dynamic range editor.
+
+        auto_set = self.auto_set
+        if auto_set is None:
+            auto_set = True
+        show_error_dialog = self.show_error_dialog
+        if show_error_dialog is None:
+            show_error_dialog = True
+
+        from traitsui.api import RangeEditor
+        return RangeEditor(
+            self,
+            mode=self.mode or "auto",
+            cols=self.cols or 3,
+            auto_set=auto_set,
+            enter_set=self.enter_set or False,
+            low_label=self.low or "",
+            high_label=self.high or "",
+            low_name=self._low_name,
+            high_name=self._high_name,
+            show_error_dialog=show_error_dialog
+        )
+
+
+
+
 class RangeEditorDemo(HasTraits):
     """Defines the RangeEditor demo class."""
 
@@ -41,6 +73,7 @@ class RangeEditorDemo(HasTraits):
     large_int_range = Range(1, 150, show_error_dialog=False)
     float_range = Range(0.0, 150.0, show_error_dialog=False)
 
+
     # RangeEditor display for narrow integer Range traits (< 17 wide):
     int_range_group1 = Group(
         Item(

traitsui/qt4/range_editor.py

@@ -426,8 +426,7 @@ def _make_button_high(self, high):
         return button_hi
 
     def _set_slider(self, value):
-        """ Updates the slider range controls.
-        """
+        """Updates the slider range controls."""
         low, high = self._get_current_range()
         if not low <= value <= high:
             low, high = self.init_current_range(value)