PyQt5 QDoubleSpinBox – 降级
在这篇文章中,我们将看到如何以编程方式降低QDoubleSpinBox的值。双层旋转框可以接受小数点的输入,我们可以用setValue方法来设置数值,如果选择了自适应小数点类型,降级将只在默认情况下减去1或减去小数点。
为了做到这一点,我们将使用stepDown方法和double spin box对象。
语法: dd_spin.stepDown()
参数: 它不需要参数
返回: 它返回无。
以下是实现方法
# 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)
# 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
# stepping down the value
push.clicked.connect(lambda: d_spin.stepDown())
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())