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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
"""QUiLoader example, showing how to dynamically load a Qt Designer form
from a UI file."""
from argparse import ArgumentParser, RawTextHelpFormatter
import sys
from PySide6.QtCore import QFile, QIODevice
from PySide6.QtWidgets import QApplication
from PySide6.QtUiTools import QUiLoader
if __name__ == '__main__':
arg_parser = ArgumentParser(description="QUiLoader example",
formatter_class=RawTextHelpFormatter)
arg_parser.add_argument('file', type=str, help='UI file')
args = arg_parser.parse_args()
ui_file_name = args.file
app = QApplication(sys.argv)
ui_file = QFile(ui_file_name)
if not ui_file.open(QIODevice.OpenModeFlag.ReadOnly):
reason = ui_file.errorString()
print(f"Cannot open {ui_file_name}: {reason}")
sys.exit(-1)
loader = QUiLoader()
widget = loader.load(ui_file, None)
ui_file.close()
if not widget:
print(loader.errorString())
sys.exit(-1)
widget.show()
sys.exit(app.exec())
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