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qslider.py
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qslider.py
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import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget
from PyQt5.QtWidgets import QSlider, QLabel, QVBoxLayout, QLCDNumber, QHBoxLayout
from PyQt5.QtCore import Qt
"""
PyQt的组成模块及功能:
QtCore: 无GUI的核心类库
QtGui: 窗口系统集成,事件处理,2D绘图,基本成像,字体设置,文本设置
QtWidgets: 各种UI空间,用于创建传统桌面风格的用户界面
Remarque:
QLabel 只能显示string类,而不能int类
"""
class Ui_mainwindow(QWidget):
def SetupUi(self):
self.qslider = QSlider(Qt.Horizontal)
self.label = QLabel('0')
self.lcd = QLCDNumber()
hlayout = QHBoxLayout()
hlayout.addWidget(self.label)
hlayout.addWidget(self.lcd)
vlayout = QVBoxLayout()
vlayout.addLayout(hlayout)
vlayout.addWidget(self.qslider)
main_widget = QWidget()
main_widget.setLayout(vlayout)
self.setCentralWidget(main_widget)
class Mainwindow(QMainWindow, Ui_mainwindow):
def __init__(self):
super(Mainwindow, self).__init__()
self.SetupUi()
self._create_connection()
def _create_connection(self):
self.qslider.valueChanged.connect(self.act_qslider)
def act_qslider(self):
value = self.qslider.value()
self.label.setText(str(value))
# print(value)
self.lcd.display(value)
self
if __name__ == '__main__':
app = QApplication(sys.argv)
mainwindow = Mainwindow()
mainwindow.show()
sys.exit(app.exec_())