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########################################################################
# File name: utils.py
# This file is part of: aioxmpp
#
# LICENSE
#
# This program 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.
#
# This program 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 program. If not, see
# <http://www.gnu.org/licenses/>.
#
########################################################################
import asyncio
import functools
import PyQt5.Qt as Qt
def asyncified_done(parent, task):
try:
task.result()
except asyncio.CancelledError:
pass
except Exception as exc:
if parent is not None:
Qt.QMessageBox.critical(
parent,
"Job failed",
str(exc),
)
def asyncified_unblock(dlg, cursor, task):
dlg.setCursor(cursor)
dlg.setEnabled(True)
def asyncify(fn):
@functools.wraps(fn)
def wrapper(*args, **kwargs):
task = asyncio.ensure_future(fn(*args, **kwargs))
task.add_done_callback(functools.partial(asyncified_done, None))
return wrapper
def asyncify_blocking(fn):
@functools.wraps(fn)
def wrapper(self, *args, **kwargs):
prev_cursor = self.cursor()
self.setEnabled(False)
self.setCursor(Qt.Qt.WaitCursor)
try:
task = asyncio.ensure_future(fn(self, *args, **kwargs))
except:
self.setEnabled(True)
self.setCursor(prev_cursor)
raise
task.add_done_callback(functools.partial(
asyncified_done,
self))
task.add_done_callback(functools.partial(
asyncified_unblock,
self, prev_cursor))
return wrapper
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