PyQt5 QDoubleSpinBox – 只选择值

在本文中，我们将了解如何选择 QDoubleSpinBox 的值。双旋转框值可以通过鼠标选择，只选择值意味着只选择值部分前缀和后缀不会包含在被选择的部分中。所选文本可用于复制/删除功能。可以分别借助setPrefix和setSuffix方法为双旋转框添加前缀和后缀。

In order to do this we will use selectAll method with the double spin box object.

Syntax : dd_spin.selectAll()

Argument : It takes no argument

Return : It returns None

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, 500, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
    # method for components
    def UiComponents(self):
  
        # creating double spin box
        d_spin = QDoubleSpinBox(self)
  
        # setting geometry to the double spin box
        d_spin.setGeometry(100, 100, 150, 40)
  
        # setting suffix
        d_spin.setSuffix(" is the Value")
  
        # step type
        step_type = QAbstractSpinBox.AdaptiveDecimalStepType
  
        # adaptive step type
        d_spin.setStepType(step_type)
  
        # creating a label
        label = QLabel("GeeksforGeeks", self)
  
        # setting geometry to the label
        label.setGeometry(100, 200, 300, 80)
  
        # making label multi line
        label.setWordWrap(True)
  
        # push button
        push = QPushButton("Press", self)
  
        # setting geometry to the push button
        push.setGeometry(100, 150, 100, 35)
  
        # adding action to the push button
        # selecting only value
        push.clicked.connect(lambda: d_spin.selectAll())
  
  
  
  
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出：