PyQt5 QDial – 设置它的下限
在本文中,我们将了解如何设置 QDial 的下限。下限表示 QDial 默认可以处理的最小值,最小值为 0,尽管我们可以随时更改它。使用下限,我们可以确保可以分配低于下限的数字。设置下限不会影响 Qdial 的移动,它仍然可以 360 度移动。
为了做到这一点,我们使用带有 QDial 对象的setMinimum
方法
Syntax : dial.setMinimum(n)
Argument : It takes integer as argument
Return : It returns None
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 minimum value to the dial
dial.setMinimum(50)
# 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())))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())
输出 :