PyQt5 – Checking if mouse is on the combobox

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

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# 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())

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Output :

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