PyQt5 – Set fix window size for height or width

When we create a window, by default the window size is resizable although, we can use setFixedSize() method to set the fixed size of the window but if we want to set only fix length of height or width only we cant use this method. We want to set one length fixed and other be variable in order to do so we have to use setFixedWidth() method to set fix length of width and setFizedHeight() method to set fix length of height.

Syntax :

self.setFixedWidth(width)
self.setFixedHeight(height)

Argument : Both take integer as argument. Action performed: setFixedWidth() sets the constant width. setFixedHeight() sets the constant height.

Code for fixed width – 

Python3

# importing the required libraries

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys


class Window(QMainWindow):
    def __init__(self):
        super().__init__()


        # set the title
        self.setWindowTitle("Python")

        width = 500

        # setting  the fixed width of window
        self.setFixedWidth(width)


        # creating a label widget
        self.label_1 = QLabel("Fixed width", self)

        # moving position
        self.label_1.move(0, 0)

        # setting up the border
        self.label_1.setStyleSheet("border :3px solid black;")

        # resizing label
        self.label_1.resize(120, 80)

        # show all the widgets
        self.show()


# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())

Output : Code for fixed height – 

Python3

# importing the required libraries

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys


class Window(QMainWindow):
    def __init__(self):
        super().__init__()


        # set the title
        self.setWindowTitle("Python")

        height = 400
        # setting  the fixed height of window
        self.setFixedHeight(height)


        # creating a label widget
        self.label_1 = QLabel("Fixed height", self)

        # moving position
        self.label_1.move(0, 0)

        # setting up the border
        self.label_1.setStyleSheet("border :3px solid black;")

        # resizing label
        self.label_1.resize(120, 80)

        # show all the widgets
        self.show()


# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())

Output :