63 lines
1.8 KiB
Python
63 lines
1.8 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Created on 2019年2月24日
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@author: Irony
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@site: https://pyqt5.com https://github.com/892768447
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@email: 892768447@qq.com
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@file: IsSignalConnected
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@description: 判断信号是否连接
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"""
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from PyQt5.QtWidgets import QWidget, QVBoxLayout, QPushButton, QTextBrowser
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__Author__ = """By: Irony
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QQ: 892768447
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Email: 892768447@qq.com"""
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__Copyright__ = 'Copyright (c) 2019 Irony'
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__Version__ = 1.0
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class Window(QWidget):
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def __init__(self, *args, **kwargs):
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super(Window, self).__init__(*args, **kwargs)
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layout = QVBoxLayout(self)
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self.button1 = QPushButton('已连接', self, clicked=self.doTest)
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self.button2 = QPushButton('未连接', self)
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self.retView = QTextBrowser(self)
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layout.addWidget(self.button1)
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layout.addWidget(self.button2)
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layout.addWidget(self.retView)
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def doTest(self):
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self.retView.append("""
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# button1 clicked 是否连接: %s, %s
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# button2 clicked 是否连接: %s, %s
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""" % (
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self.isSignalConnected(self.button1, 'clicked()'), self.button1.receivers(self.button1.clicked) > 0,
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self.isSignalConnected(self.button2, 'clicked()'), self.button2.receivers(self.button2.clicked) > 0,
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))
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def isSignalConnected(self, obj, name):
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"""判断信号是否连接
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:param obj: 对象
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:param name: 信号名，如 clicked()
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"""
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index = obj.metaObject().indexOfMethod(name)
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if index > -1:
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method = obj.metaObject().method(index)
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if method:
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return obj.isSignalConnected(method)
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return False
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if __name__ == '__main__':
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import sys
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from PyQt5.QtWidgets import QApplication
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app = QApplication(sys.argv)
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w = Window()
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w.show()
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sys.exit(app.exec_())
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