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#############################################################################
##
## Copyright (C) 2020 The Qt Company Ltd.
## Contact: https://www.qt.io/licensing/
##
## This file is part of the Qt for Python examples of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of The Qt Company Ltd nor the names of its
## contributors may be used to endorse or promote products derived
## from this software without specific prior written permission.
##
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
##
## $QT_END_LICENSE$
##
#############################################################################
import sys
from PySide6.QtCore import QObject, QThread, Signal, Slot
from PySide6.QtWidgets import QApplication, QPushButton, QVBoxLayout, QWidget
# Create a basic window with a layout and a button
class MainForm(QWidget):
def __init__(self):
super().__init__()
self.setWindowTitle("My Form")
self.layout = QVBoxLayout()
self.button = QPushButton("Click me!")
self.button.clicked.connect(self.start_thread)
self.layout.addWidget(self.button)
self.setLayout(self.layout)
# Instantiate and start a new thread
def start_thread(self):
instanced_thread = WorkerThread(self)
instanced_thread.start()
# Create the Slots that will receive signals
@Slot(str)
def update_str_field(self, message):
print(message)
@Slot(int)
def update_int_field(self, value):
print(value)
# Signals must inherit QObject
class MySignals(QObject):
signal_str = Signal(str)
signal_int = Signal(int)
# Create the Worker Thread
class WorkerThread(QThread):
def __init__(self, parent=None):
QThread.__init__(self, parent)
# Instantiate signals and connect signals to the slots
self.signals = MySignals()
self.signals.signal_str.connect(parent.update_str_field)
self.signals.signal_int.connect(parent.update_int_field)
def run(self):
# Do something on the worker thread
a = 1 + 1
# Emit signals whenever you want
self.signals.signal_int.emit(a)
self.signals.signal_str.emit("This text comes to Main thread from our Worker thread.")
if __name__ == "__main__":
app = QApplication(sys.argv)
window = MainForm()
window.show()
sys.exit(app.exec())
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