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#------------------------------------------------------------------------------
#
# Copyright (c) 2012, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Author: Pietro Berkes
# Date: Feb 2012
#
#------------------------------------------------------------------------------
"""
Test the creation and layout of labels.
"""
from traits.has_traits import HasTraits
from traits.trait_types import Bool, Str
from traitsui.view import View
from traitsui.item import Item
from traitsui.group import VGroup, HGroup
from traitsui.tests._tools import *
_DIALOG_WIDTH = 500
class ShowRightLabelsDialog(HasTraits):
""" Dialog with labels on the left/right to test the label text.
"""
bool_item = Bool(True)
traits_view = View(
VGroup(
VGroup(
Item('bool_item'),
show_left=False
),
VGroup(
Item('bool_item'),
show_left=True
),
),
)
class HResizeTestDialog(HasTraits):
""" Dialog with checkbox and text elements and labels on the right.
We test the separation between element and label in HGroups.
"""
bool_item = Bool(True)
txt_item = Str
traits_view = View(
VGroup(
HGroup(
Item('bool_item', springy=True),
show_left=False
),
VGroup(
Item('txt_item', resizable=True),
show_left=False
),
),
width = _DIALOG_WIDTH,
height = 100,
resizable=True
)
class VResizeTestDialog(HasTraits):
""" Dialog with checkbox and text elements and labels on the right.
We test the separation between element and label in VGroups.
"""
bool_item = Bool(True)
txt_item = Str
traits_view = View(
VGroup(
VGroup(
Item('bool_item', resizable=True),
show_left=False
),
VGroup(
Item('txt_item', resizable=True),
show_left=False
),
),
width = _DIALOG_WIDTH,
height = 100,
resizable=True
)
class NoLabelResizeTestDialog(HasTraits):
""" Test the combination show_label=False, show_left=False.
"""
bool_item = Bool(True)
traits_view = View(
VGroup(
Item('bool_item', resizable=True, show_label=False),
show_left=False
),
resizable=True
)
@skip_if_not_qt4
def test_qt_show_labels_right_without_colon():
# Behavior: traitsui should not append a colon ':' to labels
# that are shown to the *right* of the corresponding elements
from pyface import qt
with store_exceptions_on_all_threads():
dialog = ShowRightLabelsDialog()
ui = dialog.edit_traits()
# get reference to label objects
labels = ui.control.findChildren(qt.QtGui.QLabel)
# the first is shown to the right, so no colon
nose.tools.assert_false(labels[0].text().endswith(':'))
# the second is shown to the right, it should have a colon
nose.tools.assert_true(labels[1].text().endswith(':'))
def _test_qt_labels_right_resizing(dialog_class):
# Bug: In the Qt backend, resizing a checkbox element with a label on the
# right resizes the checkbox, even though it cannot be.
# The final effect is that the label remains attached to the right margin,
# with a big gap between it and the checkbox. In this case, the label
# should be made resizable instead.
# On the other hand, a text element should keep the current behavior and
# resize.
from pyface import qt
with store_exceptions_on_all_threads():
dialog = dialog_class()
ui = dialog.edit_traits()
# all labels
labels = ui.control.findChildren(qt.QtGui.QLabel)
# the checkbox and its label should be close to one another; the
# size of the checkbox should be small
checkbox_label = labels[0]
checkbox = ui.control.findChild(qt.QtGui.QCheckBox)
# horizontal space between checkbox and label should be small
h_space = checkbox_label.x() - checkbox.x()
nose.tools.assert_less(h_space, 100)
# and the checkbox size should also be small
nose.tools.assert_less(checkbox.width(), 100)
# the text item and its label should be close to one another; the
# size of the text item should be large
text_label = labels[0]
text = ui.control.findChild(qt.QtGui.QLineEdit)
# horizontal space between text and label should be small
h_space = text_label.x() - text.x()
nose.tools.assert_less(h_space, 100)
# and the text item size should be large
nose.tools.assert_greater(text.width(), _DIALOG_WIDTH-200)
# the size of the window should still be 500
nose.tools.assert_equal(ui.control.width(), _DIALOG_WIDTH)
@skip_if_not_qt4
def test_qt_labels_right_resizing_vertical():
_test_qt_labels_right_resizing(VResizeTestDialog)
@skip_if_not_qt4
def test_qt_labels_right_resizing_horizontal():
_test_qt_labels_right_resizing(HResizeTestDialog)
@skip_if_not_qt4
def test_qt_no_labels_on_the_right_bug():
# Bug: If one set show_left=False, show_label=False on a non-resizable
# item like a checkbox, the Qt backend tried to set the label's size
# policy and failed because label=None.
with store_exceptions_on_all_threads():
dialog = NoLabelResizeTestDialog()
ui = dialog.edit_traits()
if __name__ == "__main__":
# Execute from command line for manual testing
vw = HResizeTestDialog()
vw.configure_traits()
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