PyQt5 – Finding item through their role in comboBox
In this article we will see how we can find the item through the role in combo box, by default when we create a combo box and add items to it no role is set to the items. In order to set role use setItemData method. In order to find the item we will use findData method.
Syntax : combo_box.findData(role)
Argument : It takes string as argument i.e role
Return : It returns index of the given role if role doesn’t exist it return -1
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 , 600 , 400 ) # calling method self .UiComponents() # showing all the widgets self .show() # method for widgets def UiComponents( self ): # creating a combo box widget self .combo_box = QComboBox( self ) # setting geometry of combo box self .combo_box.setGeometry( 200 , 150 , 120 , 30 ) # geek list geek_list = ["Geek", "Geeky Geek", "Legend Geek", "Ultra Legend Geek"] # adding list of items to combo box self .combo_box.addItems(geek_list) # setting roles to the items self .combo_box.setItemData( 0 , "First role") self .combo_box.setItemData( 1 , "Second role") self .combo_box.setItemData( 2 , "Third role") self .combo_box.setItemData( 3 , "Fourth role") # finding item through role index = self .combo_box.findData("Third role") # creating label to show index label = QLabel("Third role index = " + str (index), self ) # setting geometry of label label.setGeometry( 200 , 200 , 200 , 30 ) # create pyqt5 app App = QApplication(sys.argv) # create the instance of our Window window = Window() # start the app sys.exit(App. exec ()) |
Output :