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#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2016 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."
##
## $QT_END_LICENSE$
##
#############################################################################
# PySide2 tutorial 7
import sys
from PySide2 import QtCore, QtGui, QtWidgets
class LCDRange(QtWidgets.QWidget):
valueChanged = QtCore.Signal(int)
def __init__(self, parent=None):
QtWidgets.QWidget.__init__(self, parent)
lcd = QtWidgets.QLCDNumber(2)
self.slider = QtWidgets.QSlider(QtCore.Qt.Horizontal)
self.slider.setRange(0, 99)
self.slider.setValue(0)
self.connect(self.slider, QtCore.SIGNAL("valueChanged(int)"),
lcd, QtCore.SLOT("display(int)"))
self.connect(self.slider, QtCore.SIGNAL("valueChanged(int)"),
self, QtCore.SIGNAL("valueChanged(int)"))
layout = QtWidgets.QVBoxLayout()
layout.addWidget(lcd)
layout.addWidget(self.slider)
self.setLayout(layout)
def value(self):
return self.slider.value()
@QtCore.Slot(int)
def setValue(self, value):
self.slider.setValue(value)
class MyWidget(QtWidgets.QWidget):
def __init__(self, parent=None):
QtWidgets.QWidget.__init__(self, parent)
quit = QtWidgets.QPushButton("Quit")
quit.setFont(QtGui.QFont("Times", 18, QtGui.QFont.Bold))
self.connect(quit, QtCore.SIGNAL("clicked()"),
QtWidgets.qApp, QtCore.SLOT("quit()"))
grid = QtWidgets.QGridLayout()
previousRange = None
layout = QtWidgets.QVBoxLayout()
layout.addWidget(quit)
layout.addLayout(grid)
self.setLayout(layout)
for row in range(3):
for column in range(3):
lcdRange = LCDRange()
grid.addWidget(lcdRange, row, column)
if previousRange:
self.connect(lcdRange, QtCore.SIGNAL("valueChanged(int)"),
previousRange.setValue)
previousRange = lcdRange
app = QtWidgets.QApplication(sys.argv)
widget = MyWidget()
widget.show()
sys.exit(app.exec_())
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