[英]Cannot get a QAbstractListModel subclass working on PySide2 without a hack
[英]PySide2 : cannot close a QMessageBox without quitting the APP
這是一個小代碼,我有一個線程連接到 ftp 服務器並顯示消息框。 我不明白為什么只要關閉msgBoxWait
對話框,應用程序就會崩潰(在 FTP 線程之前終止)。
我想這是因為它是最后一個顯示的窗口,但是,添加 QEventLoop 並不能解決它。 你能幫助我嗎 ?
# coding: utf-8
import sys
import random
from PySide2 import QtCore, QtWidgets, QtGui
class Logic():
def __init__(self):
self.msgBoxWait = QtWidgets.QMessageBox()
self.ftpThread = FtpThread()
self.isConnected = False
self.loop = QtCore.QEventLoop()
def run(self):
self.ftpThread.sigIsConnected.connect(self.ftpConnected, QtCore.Qt.QueuedConnection)
self.ftpThread.finished.connect(self.ftpFinished, QtCore.Qt.QueuedConnection)
self.ftpThread.sigError.connect(self.ftpError, QtCore.Qt.QueuedConnection)
self.ftpThread.start()
QtCore.QTimer.singleShot(200, self.showWaitMsgBox)
self.loop.exec_()
def showWaitMsgBox(self):
self.msgBoxWait.setWindowTitle("Waiting")
self.msgBoxWait.setText("""Waiting for ftp connection""")
if not self.isConnected:
self.msgBoxWait.exec()
def ftpConnected(self):
print("connected")
self.isConnected = True
self.msgBoxWait.close() # <- crash here or when I click on the close button
def ftpFinished(self):
print("finished")
self.ftpThread = None
self.loop.quit()
def ftpError(self, title, message):
QtWidgets.QMessageBox.critical(None, title, message)
class FtpThread(QtCore.QThread):
sigIsConnected = QtCore.Signal()
sigError = QtCore.Signal(str, str)
def run(self):
QtCore.QThread.sleep(2)
self.sigIsConnected.emit()
QtCore.QThread.sleep(1)
self.sigError.emit("error", "An error appened")
QtCore.QThread.sleep(3)
if __name__ == "__main__":
app = QtWidgets.QApplication([])
logic = Logic()
QtCore.QTimer.singleShot(0, logic.run)
sys.exit(app.exec_())
默認情況下,Qt 被配置為如果最后一個窗口關閉,應用程序將結束,因為這通常是預期的行為,但這不是您的情況,因為有時即使沒有打開的窗口,您也需要繼續運行。 解決方案是將quitOnLastWindowClosed
屬性設置為 False:
# coding: utf-8
import sys
import random
from PySide2 import QtCore, QtWidgets, QtGui
class Logic:
def __init__(self):
self.msgBoxWait = QtWidgets.QMessageBox()
self.ftpThread = FtpThread()
self.isConnected = False
def run(self):
self.ftpThread.sigIsConnected.connect(
self.ftpConnected, QtCore.Qt.QueuedConnection
)
self.ftpThread.finished.connect(self.ftpFinished, QtCore.Qt.QueuedConnection)
self.ftpThread.sigError.connect(self.ftpError, QtCore.Qt.QueuedConnection)
self.ftpThread.start()
QtCore.QTimer.singleShot(200, self.showWaitMsgBox)
def showWaitMsgBox(self):
self.msgBoxWait.setWindowTitle("Waiting")
self.msgBoxWait.setText("""Waiting for ftp connection""")
if not self.isConnected:
self.msgBoxWait.exec()
def ftpConnected(self):
print("connected")
self.isConnected = True
self.msgBoxWait.close()
def ftpFinished(self):
print("finished")
self.ftpThread = None
# QtCore.QCoreApplication.quit() should be used # to close the entire application if necessary QtCore.QCoreApplication.quit()
def ftpError(self, title, message):
QtWidgets.QMessageBox.critical(None, title, message)
class FtpThread(QtCore.QThread):
sigIsConnected = QtCore.Signal()
sigError = QtCore.Signal(str, str)
def run(self):
QtCore.QThread.sleep(2)
self.sigIsConnected.emit()
QtCore.QThread.sleep(1)
self.sigError.emit("error", "An error appened")
QtCore.QThread.sleep(3)
if __name__ == "__main__":
app = QtWidgets.QApplication([])
app.setQuitOnLastWindowClosed(False)
logic = Logic()
QtCore.QTimer.singleShot(0, logic.run)
sys.exit(app.exec_())
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.