How to disconnect and connect the signal and slot with python
This article mainly introduces how to achieve python signal and slot disconnection and connection, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor with you to understand.
Disconnection and connection between signal and slot
Sometimes for some reason, you want to disconnect a signal from a slot function temporarily or permanently. That's what you're talking about.
Generally speaking, adding dis before connect means unbinding: disconnect.
Examples are as follows
From PyQt5.QtCore import QObject,pyqtSignalclass SignalClass (QObject): # declare a signal with no parameters signal1=pyqtSignal () # declare a signal with an int type parameter signal2=pyqtSignal (int) def _ init__ (self,parent=None): super (SignalClass Self). _ init__ (parent) # connects the signal1 signal to two slot functions self.signal1.connect (self.sig1Call) self.signal1.connect (self.sig2Call) # connects the signal2 signal to the signal 1 self.signal2.connect (self.signal1) # transmit signal self.signal1.emit () self.signal2.emit (1) # disconnects the relationship between the signal and the slot function self.signal1.disconnect (self.sig1Call) self.signal1 .disconnect (self.sig2Call) self.signal2.disconnect (self.signal1) # binding signal and slot function self.signal1.connect (self.sig1Call) self.signal2.connect (self.sig1Call) # signal Emission self.signal1.emit () self.signal2.emit (1) # output signal 1 Emission def sig1Call (self): print ('signal-1 emit') # output signal 2 Emission def sig2Call (self): print (' signal-2 Emit') if _ _ name__ = ='_ main__': signal=SignalClass ()
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