54 lines
1.3 KiB
Python
54 lines
1.3 KiB
Python
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# -*- coding: utf-8 -*-
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'''
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【簡介】
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PyQt5中QSlider範例
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'''
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import sys
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from PyQt5.QtCore import *
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from PyQt5.QtGui import *
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from PyQt5.QtWidgets import *
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class SliderDemo(QWidget):
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def __init__(self, parent=None):
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super(SliderDemo, self).__init__(parent)
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self.setWindowTitle("QSlider 範例")
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self.resize(300, 100)
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layout = QVBoxLayout()
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self.l1 = QLabel("Hello PyQt5")
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self.l1.setAlignment(Qt.AlignCenter)
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layout.addWidget(self.l1)
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# 水平方向
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self.sl = QSlider(Qt.Horizontal)
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# 設定最小值
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self.sl.setMinimum(10)
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# 設定最大值
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self.sl.setMaximum(50)
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# 步長
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self.sl.setSingleStep( 3 )
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# 設置目前值
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self.sl.setValue(20)
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# 刻度位置，刻度在下方
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self.sl.setTickPosition(QSlider.TicksBelow)
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# 設定刻度間隔
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self.sl.setTickInterval(5)
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layout.addWidget(self.sl)
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# 連接訊號/槽
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self.sl.valueChanged.connect(self.valuechange)
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self.setLayout(layout)
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def valuechange(self):
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print('current slider value=%s' % self.sl.value() )
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size = self.sl.value()
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self.l1.setFont(QFont("Arial",size))
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if __name__ == '__main__':
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app = QApplication(sys.argv)
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demo = SliderDemo()
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demo.show()
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sys.exit(app.exec_())
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