[英]How to connect two classes using PyQt Signal Slot?
我正在使用Twisted和PyQt在python中編寫應用程序。 我正在嘗試做的是,當客戶端注冊時,它將反映在前端。 因此,當服務器注冊客戶端時,它發出一個信號,該信號將被捕獲並觸發一個槽,但是,它似乎不起作用。 代碼中的兩個信號插槽均不起作用。
from PyQt4 import QtGui, QtCore
import sys
from twisted.internet.protocol import Factory, Protocol
from twisted.protocols import amp
import qt4reactor
class register_procedure(amp.Command):
arguments = [('MAC',amp.String()),
('IP',amp.String()),
('Computer_Name',amp.String()),
('OS',amp.String())
]
response = [('req_status', amp.String()),
('ALIGN_FUNCTION', amp.String()),
('ALIGN_Confirmation', amp.Integer()),
('Callback_offset',amp.Integer())
]
class Ui_MainWindow(QtGui.QMainWindow):
def __init__(self,reactor, parent=None):
super(Ui_MainWindow,self).__init__(parent)
self.reactor=reactor
self.pf = Factory()
self.pf.protocol = Protocol
self.reactor.listenTCP(3610, self.pf) # listen on port 1234
def setupUi(self,MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(903, 677)
self.centralwidget = QtGui.QWidget(MainWindow)
sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.centralwidget.sizePolicy().hasHeightForWidth())
self.centralwidget.setSizePolicy(sizePolicy)
self.create_item()
self.retranslateUi(MainWindow)
self.connect(self, QtCore.SIGNAL('triggered()'), self.closeEvent)
QtCore.QObject.connect(self,QtCore.SIGNAL('registered()'),self.registered)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
self.pushButton_4.setText(_translate("MainWindow", "Delete System ", None))
self.pushButton.setText(_translate("MainWindow", "Add System", None))
self.label_2.setText(_translate("MainWindow", "SYSTEM STATUS", None))
self.label.setText(_translate("MainWindow", "Monitoring Output", None))
def registered(self):# this function is not being triggered
print "check"
self.textbrowser.append()
def closeEvent(self, event):#neither is this being triggered
print "asdf"
self.rector.stop()
MainWindow.close()
event.accept()
class bridge(QtCore.QObject):
mySignal = QtCore.SIGNAL('mySignal(QString)')
def __init__(self):
QtCore.QObject.__init__(self)
def registered(self):
print "p op"
QtCore.QObject.emit(self, QtCore.SIGNAL('registered'))
class Protocol(amp.AMP):
@register_procedure.responder
def register_procedure(self,MAC,IP,Computer_Name,OS):
self.bridge_conn=bridge()
cursor_device.execute("""select * FROM devices where MAC = ?;""",[(MAC)])
exists_val=cursor_device.fetchone()
cursor_device.fetchone()
print "register"
if not exists_val== "":
cursor_device.execute("""update devices set IP= ? , Computer_name= ? , OS = ? where MAC= ?;""",[IP,Computer_Name,OS,MAC])
self.bridge_conn.registered() # <--emits signal
return {'req_status': "done" ,'ALIGN_FUNCTION':'none','ALIGN_Confirmation':0,'Callback_offset':call_offset(1)}
else:
cursor_device.execute("""INSERT INTO devices(Mac,Ip,Computer_name,Os) values (?,?,?,?);""",[MAC,IP,Computer_Name,OS])
self.bridge_conn.registered()#<--emits signal
return {'req_status': "done" ,'ALIGN_FUNCTION':'main_loop()','ALIGN_Confirmation':0,'Callback_offset':0}
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
try:
import qt4reactor
except ImportError:
from twisted.internet import qt4reactor
qt4reactor.install()
from twisted.internet import reactor
MainWindow = QtGui.QMainWindow() # <-- Instantiate QMainWindow object.
ui = Ui_MainWindow(reactor)
ui.setupUi(MainWindow)
MainWindow.show()
reactor.run()
這是我連接兩個類的方式,我不知道這是最好的方法,但是它可以按我的意願工作:
class MyForm(QtGui.QMainWindow):
def __init__(self):
....
self.connect(self, QtCore.SIGNAL("mySignal(PyQt_PyObject)"), self.doSomething)
....
def someMethod(self):
...
button = MyPushButton(i, self)
...
def doSomething(self):
...
class MyPushButton(QtGui.QPushButton):
def __init__(self, elementID, mForm):
super(MyPushButton, self).__init__()
self.__elementID = elementID
self.__mForm = mForm
self.connect(self, QtCore.SIGNAL('clicked()'), self, QtCore.SLOT("triggerOutput()"))
@QtCore.pyqtSlot()
def triggerOutput(self):
self.__mForm.emit(QtCore.SIGNAL("mySignal(PyQt_PyObject)"), self.__elementID)
因此,重要的是最后一行,在該行中我從MyPushButton類(自身)向MyForm類(__mForm)發出了信號,並調用了doSomething()。 但是,您可以在此行中看到: button = MyPushButton(i, self)
,我已將self(MyForm)傳遞給MyPushButton。
希望對您有所幫助。
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