[英]How to use signal between different modules
I know how to use signal in a module or class like this: 我知道如何在这样的模块或类中使用信号:
class A (QObject):
def __init__(self):
QObject.__init__(self)
def afunc (self, i):
self.emit(SIGNAL("doSomePrinting(int)"), i)
def bfunc(self, i):
print "Hello World!", i
sys.exit()
if __name__=="__main__":
app=QCoreApplication(sys.argv)
a=A()
QObject.connect(a,SIGNAL("doSomePrinting(int)"),a.bfunc)
a.afunc(10)
sys.exit(app.exec_())
But I don't know how to use signal between different modules, for example: a.py and b.py .I define and bound signal in a class of a.py ,and I want emit the signal to call the bound slot which define in a.py in b.py. 但是我不知道如何在不同模块之间使用信号,例如:a.py和b.py。我在a.py类中定义并绑定了信号,我想发出信号以调用绑定的插槽,在b.py中的a.py中定义。
I use this way: 我用这种方式:
self.logsignal.connect(self.handle) signalMange.signal = self.logsignal self.logsignal.connect(self.handle)signalMange.signal = self.logsignal
I use a class to store the instance in a.py and I call it in b.py like this: 我使用一个类将实例存储在a.py中,并在b.py中将其命名为:
signalMange.signal.emit('start write project...') signalMange.signal.emit('开始写项目...')
What about my way? 那我呢 Are there better ways? 有更好的方法吗?
"a.py" “ a.py”
The class A has a signal called my_signal and we have defined a method_for_signal in our class. 类A有一个名为my_signal的信号,我们在类中定义了method_for_signal。
from PyQt4 import QtCore, QtGui
class A(QObject):
my_signal = QtCore.pyqtSignal(str)
def __init__():
super(A, self).__init__()
self.name = "ABCDEFGHIJKLM"
def method_for_signal(self):
self.my_signal.emit(self.name)
"b.py" “ b.py”
Here the class A is imported in class B, where we want to our signal. 在这里,A类是在B类中导入的,我们要在其中发出信号。
from a import A
class B(QObject):
def __init__():
super(B, self).__init__()
@staticmethod
def update(name):
print str(name)
def signal_connect(self):
self.obj = A()
self.obj.my_signal.connect(B.update)
The signal_connect method of class B when invoked will make our signal give the desired output. B类的signal_connect方法在被调用时将使我们的信号提供所需的输出。
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