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import sys
from threading import Thread
from time import sleep
from PyQt5 import QtCore, QtWidgets
from PyQt5.QtCore import pyqtSignal, pyqtSlot
from PyQt5.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QLabel
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(445, 333)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.centralwidget)
self.verticalLayout_2.setObjectName("verticalLayout_2")
self.verticalLayout = QtWidgets.QVBoxLayout()
self.verticalLayout.setObjectName("verticalLayout")
self.scrollArea = QtWidgets.QScrollArea(self.centralwidget)
self.scrollArea.setWidgetResizable(False)
self.scrollArea.setAlignment(QtCore.Qt.AlignLeading | QtCore.Qt.AlignLeft | QtCore.Qt.AlignTop)
self.scrollArea.setObjectName("scrollArea")
self.scrollAreaWidgetContents = QtWidgets.QWidget()
self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 423, 256))
self.scrollAreaWidgetContents.setObjectName("scrollAreaWidgetContents")
self.scrollArea.setWidget(self.scrollAreaWidgetContents)
self.verticalLayout.addWidget(self.scrollArea)
self.verticalLayout_2.addLayout(self.verticalLayout)
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setObjectName("pushButton")
self.verticalLayout_2.addWidget(self.pushButton)
self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit.setObjectName("lineEdit")
self.verticalLayout_2.addWidget(self.lineEdit)
MainWindow.setCentralWidget(self.centralwidget)
self.retranslateUi(MainWindow)
self.pushButton.clicked.connect(MainWindow.start_thread)
self.lineEdit.returnPressed.connect(MainWindow.send_message)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "Test"))
self.pushButton.setText(_translate("MainWindow", "start thread"))
class Test(QMainWindow, Ui_MainWindow):
messageReceived = pyqtSignal(str)
def __init__(self, parent=None):
super().__init__(parent)
self.setupUi(self)
layout = QVBoxLayout()
layout.addStretch(1)
self.scrollAreaWidgetContents.setLayout(layout)
self.messageReceived.connect(self.incoming_message)
@pyqtSlot()
def start_thread(self):
start(self, err_callback)
@pyqtSlot()
def send_message(self):
self.write_message(self.lineEdit.text(), "lightblue")
self.lineEdit.setText("")
def write_message(self, message, color):
print(f"received {message}")
label = QLabel(self.scrollAreaWidgetContents)
label.setText(message)
label.setStyleSheet(f"background-color:{color}")
self.scrollAreaWidgetContents.layout().addWidget(label)
def incoming_message(self, message):
print(f"passed {message}")
self.write_message(message, "khaki")
def start(main, error_callback):
Thread(target=listen, args=(main, error_callback), daemon=True).start()
def listen(main, error_callback):
while True:
try:
sleep(5.0)
print("Ping !")
main.messageReceived.emit("Ping !")
except:
error_callback("error")
def err_callback(message):
print(message)
if __name__ == '__main__':
app = QApplication(sys.argv)
test = Test()
test.show()
app.exec_() |
