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# python-gphoto2 - Python interface to libgphoto2
# http://github.com/jim-easterbrook/python-gphoto2
# Copyright (C) 2023-24 Jim Easterbrook jim@jim-easterbrook.me.uk
#
# This file is part of python-gphoto2.
#
# python-gphoto2 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 3 of the
# License, or (at your option) any later version.
#
# python-gphoto2 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 python-gphoto2. If not, see
# <https://www.gnu.org/licenses/>.
from collections import defaultdict
import os
import sys
import unittest
import gphoto2 as gp
path = os.path.dirname(os.path.dirname(__file__))
if path not in sys.path:
sys.path.insert(0, path)
from tests.vcamera import has_vcam, use_vcam
@unittest.skipUnless(has_vcam, 'no virtual camera')
class TestContext(unittest.TestCase):
def setUp(self):
use_vcam(True)
def cb_idle(self, context, data):
self.callback_count['cb_idle'] += 1
self.assertEqual(data, 'A')
def cb_error(self, context, text, data):
self.callback_count['cb_error'] += 1
self.assertEqual(data, 'B')
def cb_status(self, context, text, data):
self.callback_count['cb_status'] += 1
self.assertEqual(data, 'C')
def cb_message(self, context, text, data):
self.callback_count['cb_message'] += 1
self.assertEqual(data, 'D')
def cb_question(self, context, text, data):
self.callback_count['cb_question'] += 1
self.assertEqual(data, 'E')
return gp.GP_CONTEXT_FEEDBACK_OK
def cb_cancel(self, context, data):
self.callback_count['cb_cancel'] += 1
self.assertEqual(data, 'F')
return gp.GP_CONTEXT_FEEDBACK_OK
def cb_progress_start(self, context, target, text, data):
self.callback_count['cb_progress_start'] += 1
self.assertEqual(data, 'G')
return 123
def cb_progress_update(self, context, id_, current, data):
self.callback_count['cb_progress_update'] += 1
self.assertEqual(data, 'G')
self.assertEqual(id_, 123)
def cb_progress_stop(self, context, id_, data):
self.callback_count['cb_progress_stop'] += 1
self.assertEqual(id_, 123)
def test_oo_style(self):
self.callback_count = defaultdict(int)
context = gp.Context()
# set callbacks
callbacks = []
callbacks.append(context.set_idle_func(self.cb_idle, 'A'))
callbacks.append(context.set_error_func(self.cb_error, 'B'))
callbacks.append(context.set_status_func(self.cb_status, 'C'))
callbacks.append(context.set_message_func(self.cb_message, 'D'))
callbacks.append(context.set_question_func(self.cb_question, 'E'))
callbacks.append(context.set_cancel_func(self.cb_cancel, 'F'))
callbacks.append(context.set_progress_funcs(
self.cb_progress_start, self.cb_progress_update,
self.cb_progress_stop, 'G'))
for cb in callbacks:
self.assertIsInstance(cb, gp.CallbackDetails)
# create a virtual camera
camera = gp.Camera()
camera.init(context)
# call some camera functions which may invoke some callbacks
text = camera.get_summary(context)
config = camera.get_config(context)
path = camera.capture(gp.GP_CAPTURE_IMAGE, context)
info = camera.file_get_info(path.folder, path.name, context)
# all done
camera.exit(context)
del callbacks
# check result
self.assertEqual(self.callback_count['cb_progress_start'], 1)
self.assertEqual(self.callback_count['cb_progress_stop'], 1)
self.assertEqual(self.callback_count['cb_progress_update'], 20)
self.assertEqual(self.callback_count['cb_cancel'], 30)
def test_c_style(self):
self.callback_count = defaultdict(int)
context = gp.gp_context_new()
# set callbacks
callbacks = []
callbacks.append(
gp.gp_context_set_idle_func(context, self.cb_idle, 'A'))
callbacks.append(
gp.gp_context_set_error_func(context, self.cb_error, 'B'))
callbacks.append(
gp.gp_context_set_status_func(context, self.cb_status, 'C'))
callbacks.append(
gp.gp_context_set_message_func(context, self.cb_message, 'D'))
callbacks.append(
gp.gp_context_set_question_func(context, self.cb_question, 'E'))
callbacks.append(
gp.gp_context_set_cancel_func(context, self.cb_cancel, 'F'))
callbacks.append(
gp.gp_context_set_progress_funcs(
context, self.cb_progress_start, self.cb_progress_update,
self.cb_progress_stop, 'G'))
for cb in callbacks:
self.assertIsInstance(cb, gp.CallbackDetails)
# create a virtual camera
OK, camera = gp.gp_camera_new()
self.assertEqual(OK, gp.GP_OK)
self.assertEqual(gp.gp_camera_init(camera, context), gp.GP_OK)
# call some camera functions which may invoke some callbacks
OK, text = gp.gp_camera_get_summary(camera, context)
self.assertEqual(OK, gp.GP_OK)
OK, config = gp.gp_camera_get_config(camera, context)
self.assertEqual(OK, gp.GP_OK)
OK, path = gp.gp_camera_capture(camera, gp.GP_CAPTURE_IMAGE, context)
self.assertEqual(OK, gp.GP_OK)
OK, info = gp.gp_camera_file_get_info(
camera, path.folder, path.name, context)
self.assertEqual(OK, gp.GP_OK)
# all done
self.assertEqual(gp.gp_camera_exit(camera, context), gp.GP_OK)
del callbacks
# check result
self.assertEqual(self.callback_count['cb_progress_start'], 1)
self.assertEqual(self.callback_count['cb_progress_stop'], 1)
self.assertEqual(self.callback_count['cb_progress_update'], 20)
self.assertEqual(self.callback_count['cb_cancel'], 30)
if __name__ == "__main__":
unittest.main()
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