RangeEditor does not behave consistently for wx and Qt

[pbrod]

The RangeEditor behaves differently depending on if Qt or wx backend is used. The differences are listed below:

• Qt never use the 'auto_set' feature, which means it can never automatically update the value for every key stroke in the text editor which wx can.
• Wx can either update the value only on lost focus or a combinaton of lost focus, pushing the enter or tab keyboard in the text editor (the 'enter_set' feature), while Qt will only update on the combinaton of lost focus, pushing the enter or tab keyboard.
• Qt truncates the value copied or typed to the text editor silently, while wx shows an error message and color the background of the text box red.

[aaronayres35]

Thank you for the bug report!

some refs for whoever takes this issue up in the future:

traitsui/traitsui/tests/editors/test_text_editor.py

Lines 210 to 324 in 87dceb2

	# Currently if auto_set is false, and enter_set is false (the default
	# behavior), on Qt to ensure the text is actually set, Enter will set
	# the value
	@requires_toolkit([ToolkitName.qt])
	def test_simple_auto_set_false_do_not_update_qt(self):
	foo = Foo(name="")
	view = get_view(style="simple", auto_set=False)
	tester = UITester()
	with tester.create_ui(foo, dict(view=view)) as ui:
	name_field = tester.find_by_name(ui, "name")
	name_field.perform(KeySequence("NEW"))
	# with auto-set as False the displayed name should match what has
	# been typed not the trait itself, After "Enter" is pressed it
	# should match the name trait
	display_name = name_field.inspect(DisplayedText())
	self.assertEqual(foo.name, "")
	self.assertEqual(display_name, "NEW")
	name_field.perform(KeyClick("Enter"))
	display_name = name_field.inspect(DisplayedText())
	self.assertEqual(foo.name, "NEW")
	self.assertEqual(display_name, foo.name)
	# If auto_set is false, the value can be set by killing the focus. This
	# can be done by simply moving to another textbox.
	@requires_toolkit([ToolkitName.wx])
	def test_simple_auto_set_false_do_not_update_wx(self):
	foo = Foo(name="")
	view = View(
	Item("name", editor=TextEditor(auto_set=False), style="simple"),
	Item(
	"nickname", editor=TextEditor(auto_set=False), style="simple"
	),
	)
	tester = UITester()
	with tester.create_ui(foo, dict(view=view)) as ui:
	name_field = tester.find_by_name(ui, "name")
	name_field.perform(KeySequence("NEW"))
	# with auto-set as False the displayed name should match what has
	# been typed not the trait itself, After moving to another textbox
	# it should match the name trait
	display_name = name_field.inspect(DisplayedText())
	self.assertEqual(foo.name, "")
	self.assertEqual(display_name, "NEW")
	tester.find_by_name(ui, "nickname").perform(MouseClick())
	display_name = name_field.inspect(DisplayedText())
	self.assertEqual(foo.name, "NEW")
	self.assertEqual(display_name, foo.name)
	def test_custom_auto_set_true_update_text(self):
	# the auto_set flag is disregard for custom editor. (not true on WX)
	foo = Foo()
	view = get_view(auto_set=True, style="custom")
	tester = UITester()
	with tester.create_ui(foo, dict(view=view)) as ui:
	with self.assertTraitChanges(foo, "name", count=3):
	name_field = tester.find_by_name(ui, "name")
	name_field.perform(KeySequence("NEW"))
	# with auto-set the displayed name should match the name trait
	display_name = name_field.inspect(DisplayedText())
	self.assertEqual(foo.name, "NEW")
	self.assertEqual(display_name, foo.name)
	@requires_toolkit([ToolkitName.qt])
	def test_custom_auto_set_false_update_text(self):
	# the auto_set flag is disregard for custom editor. (not true on WX)
	foo = Foo()
	view = get_view(auto_set=False, style="custom")
	tester = UITester()
	with tester.create_ui(foo, dict(view=view)) as ui:
	name_field = tester.find_by_name(ui, "name")
	name_field.perform(KeySequence("NEW"))
	name_field.perform(KeyClick("Enter"))
	display_name = name_field.inspect(DisplayedText())
	self.assertEqual(foo.name, "NEW\n")
	self.assertEqual(display_name, foo.name)
	# If auto_set is false, the value can be set by killing the focus. This
	# can be done by simply moving to another textbox.
	@requires_toolkit([ToolkitName.wx])
	def test_custom_auto_set_false_do_not_update_wx(self):
	foo = Foo(name="")
	view = View(
	Item("name", editor=TextEditor(auto_set=False), style="custom"),
	Item(
	"nickname", editor=TextEditor(auto_set=False), style="custom"
	),
	)
	tester = UITester()
	with tester.create_ui(foo, dict(view=view)) as ui:
	name_field = tester.find_by_name(ui, "name")
	name_field.perform(KeySequence("NEW"))
	# with auto-set as False the displayed name should match what has
	# been typed not the trait itself, After moving to another textbox
	# it should match the name trait
	display_name = name_field.inspect(DisplayedText())
	self.assertEqual(foo.name, "")
	self.assertEqual(display_name, "NEW")
	tester.find_by_name(ui, "nickname").perform(MouseClick())
	display_name = name_field.inspect(DisplayedText())
	self.assertEqual(foo.name, "NEW")
	self.assertEqual(display_name, foo.name)
	def test_readonly_editor(self):
	foo = Foo(name="A name")
	view = get_view(style="readonly", auto_set=True)
	tester = UITester()
	with tester.create_ui(foo, dict(view=view)) as ui:
	name_field = tester.find_by_name(ui, "name")
	with self.assertRaises(InteractionNotSupported):
	name_field.perform(KeySequence("NEW"))
	# Trying to type should do nothing
	with self.assertRaises(InteractionNotSupported):
	name_field.perform(KeyClick("Space"))
	display_name = name_field.inspect(DisplayedText())
	self.assertEqual(display_name, "A name")

#1299 (comment)