PyQt5 QSpinBox – 越过线位置

在本文中，我们将看到如何克服旋转框文本的行位置。过线位置是从基线到应绘制过线的位置的距离。 over line、overs core 或 over bar 是在文本上方直接绘制的水平线的印刷特征。在数学符号中，上划线长期以来一直被用作纽带，一种显示某些符号属于一起的方式。

为了做到这一点，我们使用带有旋转框的 QFontMetrics 对象的overlinePos方法。

Syntax : font_metrics.overlinePos()

Argument : It takes no argument

Return : It returns integer.

编程需要懂一点英语

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(1, 999999)
  
        # setting prefix to spin
        self.spin.setPrefix("PREFIX ")
  
        # setting suffix to spin
        self.spin.setSuffix(" SUFFIX")
  
        # setting over line to the font
        font = self.spin.font()
        font.setOverline(True)
        self.spin.setFont(font)
  
        # 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()
  
        # getting over line position
        value = f_metrics.overlinePos()
  
        # setting text to the label
        label.setText("Distance b / w base and over line : " + str(value))
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出：