📜  PyQt5 QDial – 获得上限

📅  最后修改于: 2022-05-13 01:55:36.206000             🧑  作者: Mango

PyQt5 QDial – 获得上限

在本文中,我们将了解如何获得 QDial 的上限。上限表示 QDial 默认可以处理的最大值,最大值为 99,尽管我们可以随时借助setMaximum方法更改它。通过上限,我们可以确保可以分配高于上限的数字。设置上限不会影响 Qdial 的移动,它仍然可以 360 度移动。

为了做到这一点,我们对 QDial 对象使用maximum方法

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 QDial object
        dial = QDial(self)
  
        # setting geometry to the dial
        dial.setGeometry(100, 100, 100, 100)
  
        # setting maximum value to the dial
        dial.setMaximum(200)
  
        # making notch visible
        dial.setNotchesVisible(True)
  
  
        # creating a label
        label = QLabel("GeeksforGeeks", self)
  
        # setting geometry to the label
        label.setGeometry(220, 125, 200, 60)
  
        # making label multiline
        label.setWordWrap(True)
  
        # adding action to the dial
        dial.valueChanged.connect(lambda: label.setText("Value = " + str(dial.value())))
  
        # getting maximum value
        value = dial.maximum()
  
        # setting text to the label
        label.setText("Maximum 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())

输出 :