我想问是否可以使用信号/插槽来传输信息,例如:“是否单击了此按钮?”
我在这里准备了一些代码。...
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import sys
class Worker(QObject):
def __init__(self, parent=None):
super(Worker, self).__init__(parent)
@pyqtSlot(str, str, int, add_one_more_signal)
def onJob(self, strA, strB, int1, add_one_more_signal):
print(strA, strB, int1)
# if the signal detects the btn1 was clicked:
# print("button 1 is clicked; button 2 is not clicked")
# if the signal detects the btn2 was clicked:
# print("button 1 is not clicked; button 2 is clicked")
class MyApp(QWidget):
signal = pyqtSignal(str, str, int, add_one_more_signal)
def __init__(self, parent= None):
super(MyApp, self).__init__(parent)
self.initUI()
def initUI(self):
self.btn1 = QPushButton("start 1", self)
self.btn2 = QPushButton("start 2", self)
self.btn1.clicked.connect(self.start)
self.btn2.clicked.connect(self.start)
self.layout = QVBoxLayout()
self.layout.addWidget(self.btn1)
self.layout.addWidget(self.btn2)
self.setLayout(self.layout)
self.show()
def start(self):
otherClass = Worker()
self.signal.connect(otherClass.onJob)
self.signal.emit("foo", "baz", 10, self.btn1.clicked(True) or self.btn2.clicked(True)) # How to write this line?
if __name__ == '__main__':
app = QApplication(sys.argv)
window = MyApp()
window.show()
sys.exit(app.exec_())
请不要误解我的意思。我以非常罕见的知识知道如何实现编程目的。我只想知道如何传输信号,该信号检测是否单击了按钮。 -老实说,我也想知道Signal + Slot的功能。
在我的代码中,有两个按钮。它们共享相同的子功能。 (正如我提到的,仅用于此问题。)单击其中一个时,会将三个参数从MyApp-Class传输到Worker-Class。
现在,我要引入第四个参数,我也在上面的代码中编写了该参数。第四个参数仅执行一项工作,即发送信息(无论是否单击按钮)。
所以我的问题是:如果可行,如何编写代码?
一种可能的解决方案是发送显示按钮的文本,为此,第四个参数必须为str
类型,以获取发出信号的对象,我们使用sender()
,在这种情况下,sender()
为被按下的对象,然后我们获取文本并发送。
class Worker(QObject):
def __init__(self, parent=None):
super(Worker, self).__init__(parent)
@pyqtSlot(str, str, int, str)
def onJob(self, strA, strB, int1, text):
print(strA, strB, int1)
if text == "start 1":
print("button 1 is clicked")
elif text == "start 2":
print("button 2 is clicked")
class MyApp(QWidget):
signal = pyqtSignal(str, str, int, str)
def __init__(self, parent= None):
super(MyApp, self).__init__(parent)
self.initUI()
def initUI(self):
self.btn1 = QPushButton("start 1", self)
self.btn2 = QPushButton("start 2", self)
self.btn1.clicked.connect(self.start)
self.btn2.clicked.connect(self.start)
self.layout = QVBoxLayout()
self.layout.addWidget(self.btn1)
self.layout.addWidget(self.btn2)
self.setLayout(self.layout)
self.show()
def start(self):
otherClass = Worker()
btn = self.sender()
self.signal.connect(otherClass.onJob)
self.signal.emit("foo", "baz", 10, btn.text())