如何动态创建小部件并在Pyqt5中分配信号?

Question

我的意图是动态创建一个标签，并为该标签分配一些功能/信号。成功地完成了我意图的第一部分，但却给那个标签分配了信号。例如，如果我单击"Accounts";或">kannaku"或"F1">，然后我需要打印">你点击了label1">等等

import sys
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
import assist_stylesheet_001
dict_lbl = {
"lbl1":{"name":"label1","item1":"Accounts",   "item2":"kannagu",    "shortcut":"F1","printitem":"You clicked label1"},
"lbl2":{"name":"label2","item1":"Inventory",  "item2":"Saragu",     "shortcut":"F2","printitem":"You clicked label2"},
"lbl3":{"name":"label3","item1":"Manufacture","item2":"Thayarippu", "shortcut":"F3","printitem":"You clicked label3"},
"lbl4":{"name":"label4","item1":"PayRoll",    "item2":"Sambalam",   "shortcut":"F4","printitem":"You clicked label4"}
}
dict_key = {k: {n: d[k] for n, d in dict_lbl.items()} for k in {k for d in dict_lbl.values() for k in d}}
sub_keys = list(set().union(*[d.keys() for d in dict_lbl.values()]))

class MyLabel(QLabel):
leftclicked = pyqtSignal()
entery = pyqtSignal()
def mousePressEvent(self, event):
if event.button() == Qt.LeftButton:
self.leftclicked.emit()
QLabel.mousePressEvent(self, event)
def keyPressEvent(self, event):
if event.key() == Qt.Key_Return or event.key() == Qt.Key_Enter:
self.entery.emit()
QLabel.keyPressEvent(self,event)
class Dynamic_Widgets(QWidget):
def __init__(self):
super(). __init__()
self.setWindowTitle("Dynamic Widget")
self.vbox1,self.vbox2,self.vbox3,self.hbox = QVBoxLayout(),QVBoxLayout(),QVBoxLayout(),QHBoxLayout()
self.hbox.addLayout(self.vbox1),self.hbox.addLayout(self.vbox2),self.hbox.addLayout(self.vbox3)
self.hbox.addSpacing(5)
self.setLayout(self.hbox)
self.name,self.itm1,self.itm2,self.scut,self.pitm = {}, {}, {}, {}, {}
for ikey,ivalue in dict_key['item1'].items():
self.itm1[ikey] = MyLabel()
self.itm1[ikey].setObjectName("obj"+ivalue)
self.itm1[ikey].setProperty("type","1")
self.itm1[ikey].setStyleSheet(assist_stylesheet_001.style_toplayout())
self.itm1[ikey].leftclicked.connect(self.lbl_clicked)
self.itm1[ikey].setText(str(ivalue))
self.vbox1.addWidget((self.itm1[ikey]))
print(ikey,ivalue)
for ikey, ivalue in dict_key['item2'].items():
self.itm2[ikey] = MyLabel()
self.itm2[ikey].setObjectName("obj"+ivalue)
self.itm2[ikey].setProperty("type", "1")
self.itm2[ikey].setStyleSheet(assist_stylesheet_001.style_toplayout())
self.itm2[ikey].leftclicked.connect(self.lbl_clicked)
self.itm2[ikey].setText(str(ivalue))
self.vbox2.addWidget((self.itm2[ikey]))
for ikey, ivalue in dict_key['shortcut'].items():
self.scut[ikey] = MyLabel()
self.scut[ikey].setObjectName("obj"+ivalue)
self.scut[ikey].setProperty("type", "1")
self.scut[ikey].setStyleSheet(assist_stylesheet_001.style_toplayout())
self.scut[ikey].leftclicked.connect(self.lbl_clicked)
self.scut[ikey].setText(str(ivalue))
self.vbox3.addWidget((self.scut[ikey]))

def lbl_clicked(self):
print("dd")

def main():
app = QApplication(sys.argv)
ex = Dynamic_Widgets()
qApp.setStyleSheet(assist_stylesheet_001.style_toplayout())
ex.show()
sys.exit(app.exec_())

if __name__ == '__main__':
main()

Answer 1

如果我正确理解了您的意图，您需要将每个项目的值作为标签的命名参数传递给函数，这些值是您希望由函数打印的。像这样:

for ikey,ivalue in dict_key['item1'].items():
self.itm1[ikey] = MyLabel()
self.itm1[ikey].setObjectName("obj"+ivalue)
[...]
self.itm1[ikey].leftclicked.connect(lambda clicked=True a=ikey: self.lbl_clicked(a))

这确保了ikey不会被困在for循环中，而是被绑定到创建lambda时的值。然后，您必须调整您的信号和插槽(leftclicked和self.lbl_clicked)以接受和使用参数。