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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
# PySide6 tutorial 7
import sys
from PySide6.QtCore import Signal, Slot, Qt
from PySide6.QtGui import QFont
from PySide6.QtWidgets import (QApplication, QGridLayout, QLCDNumber,
QPushButton, QSlider, QVBoxLayout, QWidget)
class LCDRange(QWidget):
value_changed = Signal(int)
def __init__(self, parent=None):
super().__init__(parent)
lcd = QLCDNumber(2)
self.slider = QSlider(Qt.Horizontal)
self.slider.setRange(0, 99)
self.slider.setValue(0)
self.slider.valueChanged.connect(lcd.display)
self.slider.valueChanged.connect(self.value_changed)
layout = QVBoxLayout(self)
layout.addWidget(lcd)
layout.addWidget(self.slider)
def value(self):
return self.slider.value()
@Slot(int)
def set_value(self, value):
self.slider.setValue(value)
class MyWidget(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
quit = QPushButton("Quit")
quit.setFont(QFont("Times", 18, QFont.Bold))
quit.clicked.connect(qApp.quit) # noqa: F821
previous_range = None
layout = QVBoxLayout(self)
layout.addWidget(quit)
grid = QGridLayout()
layout.addLayout(grid)
for row in range(3):
for column in range(3):
lcd_range = LCDRange()
grid.addWidget(lcd_range, row, column)
if previous_range:
lcd_range.value_changed.connect(previous_range.set_value)
previous_range = lcd_range
if __name__ == '__main__':
app = QApplication(sys.argv)
widget = MyWidget()
widget.show()
sys.exit(app.exec())
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