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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."
##
## $QT_END_LICENSE$
##
#############################################################################
import random
from PySide6.QtCharts import QChart, QSplineSeries, QValueAxis
from PySide6.QtCore import Qt, QTimer, Slot
from PySide6.QtGui import QPen
class Chart(QChart):
def __init__(self, parent=None):
super().__init__(QChart.ChartTypeCartesian, parent, Qt.WindowFlags())
self._timer = QTimer()
self._series = QSplineSeries(self)
self._titles = []
self._axisX = QValueAxis()
self._axisY = QValueAxis()
self._step = 0
self._x = 5
self._y = 1
self._timer.timeout.connect(self.handleTimeout)
self._timer.setInterval(1000)
green = QPen(Qt.red)
green.setWidth(3)
self._series.setPen(green)
self._series.append(self._x, self._y)
self.addSeries(self._series)
self.addAxis(self._axisX, Qt.AlignBottom)
self.addAxis(self._axisY, Qt.AlignLeft)
self._series.attachAxis(self._axisX)
self._series.attachAxis(self._axisY)
self._axisX.setTickCount(5)
self._axisX.setRange(0, 10)
self._axisY.setRange(-5, 10)
self._timer.start()
@Slot()
def handleTimeout(self):
x = self.plotArea().width() / self._axisX.tickCount()
y = (self._axisX.max() - self._axisX.min()) / self._axisX.tickCount()
self._x += y
self._y = random.uniform(0, 5) - 2.5
self._series.append(self._x, self._y)
self.scroll(x, 0)
if self._x == 100:
self._timer.stop()
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