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PyQt5 QSpinBox – Checking if the character is UTF-32 format

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  • Last Updated : 26 May, 2020
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In this article we will see how we can check if the given character in the font of the spin box is in UTF-32 format. UTF-32 is a fixed-length encoding used to encode Unicode code points that uses exactly 32 bits per code point. UTF-32 is a fixed-length encoding, in contrast to all other Unicode transformation formats, which are variable-length encodings.

In order to do this we use inFontUcs4 method with the spin box’s QFontMetrics object.

Syntax : font_metrics.inFontUcs4(unit_character)

Argument : It takes integer as argument

Return : It returns bool.

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):
        # setting title
        self.setWindowTitle("Python ")
        # setting geometry
        self.setGeometry(100, 100, 600, 400)
        # calling method
        # showing all the widgets
        # method for widgets
    def UiComponents(self):
        # creating spin box
        self.spin = QSpinBox(self)
        # setting geometry to spin box
        self.spin.setGeometry(100, 100, 250, 40)
        # setting range to the spin box
        self.spin.setRange(0, 999999)
        # setting prefix to spin
        self.spin.setPrefix("PREFIX ")
        # setting suffix to spin
        self.spin.setSuffix(" SUFFIX")
        # creating a label
        label = QLabel(self)
        # making label multi line
        # setting geometry to the label
        label.setGeometry(100, 200, 300, 60)
        # getting font metrics
        f_metrics = self.spin.fontMetrics()
        # checking if the character is in the font
        check = f_metrics.inFontUcs4(1)
        # setting text to the label
        label.setText(" UTF Format  : " + str(check))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app

Output :

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