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同步操作将从 PyQt5/PyQt 强制同步,此操作会覆盖自 Fork 仓库以来所做的任何修改,且无法恢复!!!
确定后同步将在后台操作,完成时将刷新页面,请耐心等待。
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Created on 2021/4/9
@author: Irony
@site: https://pyqt.site , https://github.com/PyQt5
@email: 892768447@qq.com
@file: LfSlider
@description: 降低值变化频率
"""
from datetime import datetime
try:
from PyQt5.QtCore import pyqtSignal, QTimer, Qt
from PyQt5.QtWidgets import QApplication, QSlider, QWidget, QVBoxLayout, QPlainTextEdit, QHBoxLayout, \
QGroupBox
except ImportError:
from PySide2.QtCore import Signal as pyqtSignal, QTimer, Qt
from PySide2.QtWidgets import QApplication, QSlider, QWidget, QVBoxLayout, QPlainTextEdit, QHBoxLayout, \
QGroupBox
class LfSlider(QSlider):
valueChanged = pyqtSignal(int)
def __init__(self, *args, **kwargs):
delay = kwargs.pop('delay', 500)
super(LfSlider, self).__init__(*args, **kwargs)
self.lastValue = self.value()
self.uTimer = QTimer(self)
self.uTimer.timeout.connect(self.onValueChanged)
self.uTimer.start(delay)
def onValueChanged(self):
if self.lastValue != self.value():
self.lastValue = self.value()
self.valueChanged.emit(self.lastValue)
class Window(QWidget):
def __init__(self, *args, **kwargs):
super(Window, self).__init__(*args, **kwargs)
layout = QHBoxLayout(self)
# 左侧原始
left_group = QGroupBox('原始QSlider', self)
left_layout = QVBoxLayout(left_group)
self.leftLabel = QPlainTextEdit(self)
left_layout.addWidget(self.leftLabel)
self.leftSlider = QSlider(Qt.Horizontal, self)
self.leftSlider.valueChanged.connect(self.onLeftChanged)
left_layout.addWidget(self.leftSlider)
layout.addWidget(left_group)
# 右侧低频率变化
right_group = QGroupBox('LfSlider', self)
right_layout = QVBoxLayout(right_group)
self.rightLabel = QPlainTextEdit(self)
right_layout.addWidget(self.rightLabel)
self.rightSlider = LfSlider(Qt.Horizontal, self)
self.rightSlider.valueChanged.connect(self.onRightChanged)
right_layout.addWidget(self.rightSlider)
layout.addWidget(right_group)
def onLeftChanged(self, value):
self.leftLabel.appendPlainText(datetime.now().strftime("[%H:%M:%S.%f] ") + str(value))
def onRightChanged(self, value):
self.rightLabel.appendPlainText(datetime.now().strftime("[%H:%M:%S.%f] ") + str(value))
if __name__ == '__main__':
import sys
import cgitb
cgitb.enable(format='text')
app = QApplication(sys.argv)
w = Window()
w.show()
sys.exit(app.exec_())
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