PyQt5 QSpinBox - 检查字符是否在字体中
在本文中,我们将看到如何检查给定字符是否在旋转框的字体中,为此我们必须获取旋转框的 QFontMetrics 对象,这可以借助fontmetrics
方法来完成。
为了做到这一点,我们将inFont
方法与微调框的 QFontMetrics 对象一起使用。
Syntax : font_metrics.inFont(ch)
Argument : It takes string as argument
Return : It returns bool.
下面是实现
# 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 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
label.setWordWrap(True)
# 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.inFont('I')
# setting text to the label
label.setText(" 'I' in font ? : " + str(check))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())
输出 :