PyQt5 QSpinBox - 获取字符的边界矩形
在本文中,我们将看到如何获得旋转框给定字符的边界矩形,即如果要在坐标系原点绘制字符“ch”,则该矩形被墨水覆盖。边界矩形可以延伸到 (0, 0) 的左侧(例如,对于斜体字体),并且文本输出可以覆盖边界矩形中的所有像素。对于空格字符,矩形通常为空。
为了做到这一点,我们将boundingRect
方法与微调框的 QFontMetrics 对象一起使用。
Syntax : font_metrics.boundingRect(ch)
Argument : It takes string as argument
Return : It returns QRect object
注意:此方法也可用于获取整个文本的边界矩形
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()
# getting average character width
rec = f_metrics.boundingRect('S')
# setting text to the label
label.setText("Rect : " + str(rec))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())
输出 :