test_InteractiveObject.py

# This file is part of pyOCCT which provides Python bindings to the OpenCASCADE
# geometry kernel.
#
# Copyright (C) 2016-2018  Laughlin Research, LLC
# Copyright (C) 2021 Trevor Laughlin and the pyOCCT contributors
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
import unittest

from OCCT.AIS import AIS_InteractiveContext, AIS_InteractiveObject
from OCCT.Aspect import Aspect_DisplayConnection
from OCCT.OpenGl import OpenGl_GraphicDriver
from OCCT.V3d import V3d_Viewer

try:
    display_connection = Aspect_DisplayConnection()
except RuntimeError:
    display_connection = None


class InteractiveObject(AIS_InteractiveObject):
    called_compute = False
    called_compute_selection = False

    def Compute(self, prs_mgr, pres, mode):
        self.called_compute = True

    def ComputeSelection(self, pres, mode):
        self.called_compute_selection = True


@unittest.skipIf(display_connection is None, "No display connection")
class Test_InteractiveObject(unittest.TestCase):
    """
    Test for V3d_View class.
    """

    @classmethod
    def setUpClass(cls):
        """
        Set up with a V3d_View.
        """
        driver = cls._driver = OpenGl_GraphicDriver(display_connection)
        viewer = cls._viewer = V3d_Viewer(driver)
        cls._view = viewer.CreateView()
        cls._context = AIS_InteractiveContext(viewer)

    def test_Compute(self):
        """
        Test V3d_View::ChangeRenderingParams.
        """
        view = self._view
        context = self._context

        # Make sure compute is called
        ais_object = InteractiveObject()
        self.assertFalse(ais_object.called_compute)
        self.assertFalse(ais_object.called_compute_selection)
        context.Display(ais_object, True)
        self.assertTrue(ais_object.called_compute)
        self.assertTrue(ais_object.called_compute_selection)


if __name__ == '__main__':
    unittest.main()