PyQt5 QListWidget – Current Item Changed Signal
In this article we will see how we can get the current item changed signal of the QListWidget. QListWidget is a convenience class that provides a list view with a classic item-based interface for adding and removing items. QListWidget uses an internal model to manage each QListWidgetItem in the list. Current item can be set from the list of item. Unless the selection mode is NoSelection, the item is also selected. It can be set with the help of setCurrentItem method. This signal is emitted when current item is changed.
In order to do this we will use currentItemChanged method with the list widget object. Syntax : list_widget.currentItemChanged.connect(method) Argument : It takes method as argument Return : It returns None
Below is the implementation
Python3
# importing libraries from PyQt5.QtWidgets import * from PyQt5 import QtCore, QtGui from PyQt5.QtGui import * from PyQt5.QtCore import * import sys class Window(QMainWindow): def __init__( self ): super ().__init__() # setting title self .setWindowTitle("Python ") # setting geometry self .setGeometry( 100 , 100 , 500 , 400 ) # calling method self .UiComponents() # showing all the widgets self .show() # method for components def UiComponents( self ): # creating a QListWidget list_widget = QListWidget( self ) # setting geometry to it list_widget.setGeometry( 50 , 70 , 150 , 60 ) # list widget items item1 = QListWidgetItem("A") item2 = QListWidgetItem("B") item3 = QListWidgetItem("C") # adding items to the list widget list_widget.addItem(item1) list_widget.addItem(item2) list_widget.addItem(item3) # setting current item list_widget.setCurrentItem(item2) # creating a label label = QLabel("w3wiki", self ) # setting geometry to the label label.setGeometry( 230 , 80 , 280 , 80 ) # making label multi line label.setWordWrap( True ) # getting item changed signal list_widget.currentItemChanged.connect( lambda : label.setText("Item Changed Signal")) # create pyqt5 app App = QApplication(sys.argv) # create the instance of our Window window = Window() # start the app sys.exit(App. exec ()) |
Output :