PyQt5 QSpinBox – 获得文本的正确方位值

在这篇文章中，我们将看到如何从旋转框的文本中获得给定字符的右方位值。右侧方位是指字符的最右侧像素与后续字符的逻辑原点之间向左的距离。如果字符的像素延伸到字符宽度的右边，这个值就是负的。

为了做到这一点，我们使用了自旋盒的QFontMetrics对象的rightBearing方法。

语法： font_metrics.rightBearing(ch)

参数： 它使用字符串作为参数

返回： 它返回整数。

下面是实现方法

# 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 right bearing value of the character
        value = f_metrics.rightBearing('P')
  
        # setting text to the label
        label.setText("Right bearing value of 'P' : " + 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 :