PyQt5 – QDial
QDial是 PyQt5 中的一个类,它使用户可以在程序可定义的范围内选择值,并且该范围可以环绕(例如,测量角度从 0 到 359 度)。此外,它还可用于以类似于速度计的方式显示当前值。下面是 QDial 的样子
例子 :
具有 QDial 的窗口和用户可以更改它的值,当用户更改值时,当前值将显示在标签中
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)
# adding action to the dial
dial.valueChanged.connect(lambda: dial_method())
# creating a label
label = QLabel("GeeksforGeeks", self)
# setting geometry to the label
label.setGeometry(220, 125, 200, 60)
# making label multiline
label.setWordWrap(True)
# method called by the dial
def dial_method():
# getting dial value
value = dial.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())
输出 :