PySide6——slider使用

最近在研究python下的QSlider使用方法，参考了不脱发的程序猿的介绍：

https://blog.youkuaiyun.com/m0_38106923/article/details/120897051

实现功能如上图所示。

import sys
from PySide6.QtCore import *
from PySide6.QtGui import *
from PySide6.QtWidgets import *
 
class SliderDemo(QWidget):
    def __init__(self, parent=None):
        super(SliderDemo, self).__init__(parent)
        self.setWindowTitle("QSlider 例子")  
        self.resize(300, 100)
        
        layout = QVBoxLayout()
        self.l1 = QLabel("Hello Pyside6")
        self.l1.setAlignment(Qt.AlignCenter)
        layout.addWidget(self.l1)
    
        # 水平方向
        self.sl = QSlider(Qt.Horizontal)
        #设置最小值
        self.sl.setMinimum(10)
        #设置最大值
        self.sl.setMaximum(50)
        # 步长
        self.sl.setSingleStep( 3 ) 
        # 设置当前值
        self.sl.setValue(20)
        # 刻度位置，刻度在下方
        self.sl.setTickPosition(QSlider.TicksBelow)
        # 设置刻度间隔
        self.sl.setTickInterval(5)
        layout.addWidget(self.sl)

        self.l2 = QLabel(str(self.sl.value()))#create and init lab value
        #self.l2.setText(str(self.sl.value()))
        self.l2.setAlignment(Qt.AlignCenter)
        layout.addWidget(self.l2)
        # 连接信号槽
        self.sl.valueChanged.connect(self.valuechange)
        self.setLayout(layout)
                      
    def valuechange(self):
        print('current slider value=%s' % self.sl.value() )
        size = self.sl.value()
        self.l1.setFont(QFont("Arial",size))
        self.l2.setText(str(size))

if __name__ == '__main__':
    app = QApplication(sys.argv)
    demo = SliderDemo()
    demo.show()
    sys.exit(app.exec())