从线程内部调用方法到 python pyqt 中的另一个 class
Calling a method from inside a thread to another class in python pyqt
从 pyqt window,我调用一个线程来执行,它将数据发回 window 以更新 QLCDNumber,它工作正常。但是当线程完成 运行 时,我希望它在接收 window 中调用一个方法。或者接收 window,在接收到所有数据后,调用它自己的方法。我不确定如何在 window 中正确使用语句来使其工作,也不确定如何从线程中调用该方法。我已经尝试了很多方法,但我已经在代码中写下了我想要完成的事情。有什么想法吗?
class MyThread(QtCore.QThread):
countChange = QtCore.pyqtSignal(int)
countReset = QtCore.pyqtSignal(int)
def __init__(self, parent=None):
super(MyThread, self).__init__(parent)
self.stopped = QtCore.QEvent(QtCore.QEvent.User)
def start(self):
self.stopped.setAccepted(False)
super(MyThread, self).start()
def run(self):
while not self.stopped.isAccepted():
credit = 0
limit = 13
while credit <= limit:
press = int(input('add a number'))
if press == 1:
if not credit >= limit:
credit=(credit + 1)
print (credit)
self.countChange.emit(credit)
if credit >= limit:
print ('Enough Credit')
self.stop()
def stop(self):
self.stopped.setAccepted(True)
## What I want to have here is:
## send a command to class winDow.move_on() to execute
class winDow(QtGui.QMainWindow,cashwin.Ui_MainWindow):
def __init__(self, parent=None):
super(winDow, self).__init__(parent)
self.setupUi(self)
self.thread = MyThread(self)
self.thread.countChange.connect(self.lcdNumber.display)
self.pull_credit()
## or if self.thread.countChange.connect == 13:
## self.move_on()
@QtCore.pyqtSlot()
def pull_credit(self):
self.thread.start()
def move_on(self):
self.window = NextWindow()
self.window.show()
self.close()
这正是信号和槽的用途:对象之间的通信,尤其是不同线程中的对象。
幸运的是,QThread
对象已经有一个已定义的信号,只要它们完成并即将退出,就会发出该信号。您可以简单地将其连接到线程完成其工作后要执行的主 window 插槽。
将 class 的构造函数修改为如下所示:
class winDo(QtGui.QMainWindow, cashwin.Ui_MainWindow):
def __init__(self, parent=None):
# What you already have ...
self.thread = MyThread(self)
self.thread.countChange.connect(self.lcdNumber.display)
self.thread.finished.connect(self.move_on)
从 pyqt window,我调用一个线程来执行,它将数据发回 window 以更新 QLCDNumber,它工作正常。但是当线程完成 运行 时,我希望它在接收 window 中调用一个方法。或者接收 window,在接收到所有数据后,调用它自己的方法。我不确定如何在 window 中正确使用语句来使其工作,也不确定如何从线程中调用该方法。我已经尝试了很多方法,但我已经在代码中写下了我想要完成的事情。有什么想法吗?
class MyThread(QtCore.QThread):
countChange = QtCore.pyqtSignal(int)
countReset = QtCore.pyqtSignal(int)
def __init__(self, parent=None):
super(MyThread, self).__init__(parent)
self.stopped = QtCore.QEvent(QtCore.QEvent.User)
def start(self):
self.stopped.setAccepted(False)
super(MyThread, self).start()
def run(self):
while not self.stopped.isAccepted():
credit = 0
limit = 13
while credit <= limit:
press = int(input('add a number'))
if press == 1:
if not credit >= limit:
credit=(credit + 1)
print (credit)
self.countChange.emit(credit)
if credit >= limit:
print ('Enough Credit')
self.stop()
def stop(self):
self.stopped.setAccepted(True)
## What I want to have here is:
## send a command to class winDow.move_on() to execute
class winDow(QtGui.QMainWindow,cashwin.Ui_MainWindow):
def __init__(self, parent=None):
super(winDow, self).__init__(parent)
self.setupUi(self)
self.thread = MyThread(self)
self.thread.countChange.connect(self.lcdNumber.display)
self.pull_credit()
## or if self.thread.countChange.connect == 13:
## self.move_on()
@QtCore.pyqtSlot()
def pull_credit(self):
self.thread.start()
def move_on(self):
self.window = NextWindow()
self.window.show()
self.close()
这正是信号和槽的用途:对象之间的通信,尤其是不同线程中的对象。
幸运的是,QThread
对象已经有一个已定义的信号,只要它们完成并即将退出,就会发出该信号。您可以简单地将其连接到线程完成其工作后要执行的主 window 插槽。
将 class 的构造函数修改为如下所示:
class winDo(QtGui.QMainWindow, cashwin.Ui_MainWindow):
def __init__(self, parent=None):
# What you already have ...
self.thread = MyThread(self)
self.thread.countChange.connect(self.lcdNumber.display)
self.thread.finished.connect(self.move_on)