PyQt5 – QDoubleSpinBox

QDoubleSpinBox允许用户通过点击上下按钮或按键盘上的向上或向下键来选择一个值，以增加或减少当前显示的值。用户也可以手动输入数值。旋钮箱支持双倍数值，但也可以扩展到使用不同的字符串。下面是双倍旋转框的样子

例子：

一个具有双旋钮箱和一个标签的窗口，当值发生变化时，标签中会出现一条显示当前值的信息。

下面是实现的过程

# 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)
  
        # adding action to the double spin box
        d_spin.valueChanged.connect(lambda:  spin_method())
  
        # 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)
  
        def spin_method():
  
            # getting current value of double spin box
            value = d_spin.value()
  
            # setting text to the label
            label.setText("Current Value : " + str(value))
  
  
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())