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#############################################################################
##
## Copyright (C) 2021 The Qt Company Ltd.
## Contact: http://www.qt.io/licensing/
##
## This file is part of the Qt for Python examples of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of The Qt Company Ltd nor the names of its
## contributors may be used to endorse or promote products derived
## from this software without specific prior written permission.
##
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
##
## $QT_END_LICENSE$
##
#############################################################################
# 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)
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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