PyQt5 – Checking if mouse is on the combobox

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In this article we will see how we can know if the mouse/cursor is on the combo box or not, in order to do so we use underMouse method, every time when this function is called it checks the position of the mouse and checks if its position is on the combo box or not.

In order to do this we use underMouse method.

Syntax : combo_box.underMouse()

Argument : It takes no argument

Return : It returns bool

Steps for implementation :

1. Create a combo box
2. Create a label to show the result
3. Create a timer object which calls a function after every 100 milliseconds
4. Inside the timer function check if the combo box is under mouse
5. Show the result through label

Below is the implementation

# 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 check-able combo box object 
        self.combo_box = QComboBox(self) 
  
        # setting geometry of combo box 
        self.combo_box.setGeometry(200, 150, 100, 30) 
  
        # geek list 
        geek_list = ["Sayian", "Super Sayian", "Super Sayian 2", "Super Sayian B"] 
  
        # adding list of items to combo box 
        self.combo_box.addItems(geek_list) 
  
        # setting stylesheet of the combo box 
        self.combo_box.setStyleSheet("border : 1px solid red;") 
  
        # creating label to show label 
        self.label = QLabel(self) 
  
        # setting geometry to the label 
        self.label.setGeometry(200, 200, 200, 30) 
  
        # creating a timer object 
        timer = QTimer(self) 
  
        # adding action to the timer 
        timer.timeout.connect(self.do_something) 
  
        # starting timer 
        timer.start(100) 
  
    # action called by the timer 
    def do_something(self): 
  
        # checking if the combo box is under mouse 
        under = self.combo_box.underMouse() 
  
        # setting text to the label 
        self.label.setText("Under Mouse ? : " + str(under)) 
  
# create pyqt5 app 
App = QApplication(sys.argv) 
  
# create the instance of our Window 
window = Window() 
  
# start the app 
sys.exit(App.exec()) 