chart.cpp
81 lines
| 2.5 KiB
| text/x-c
|
CppLexer
winter
|
r0 | /**************************************************************************** | ||
** | ||||
** Copyright (C) 2016 The Qt Company Ltd. | ||||
** Contact: https://www.qt.io/licensing/ | ||||
** | ||||
** This file is part of the Qt Charts module of the Qt Toolkit. | ||||
** | ||||
** $QT_BEGIN_LICENSE:GPL$ | ||||
** Commercial License Usage | ||||
** Licensees holding valid commercial Qt licenses may use this file in | ||||
** accordance with the commercial license agreement provided with the | ||||
** Software or, alternatively, in accordance with the terms contained in | ||||
** a written agreement between you and The Qt Company. For licensing terms | ||||
** and conditions see https://www.qt.io/terms-conditions. For further | ||||
** information use the contact form at https://www.qt.io/contact-us. | ||||
** | ||||
** GNU General Public License Usage | ||||
** Alternatively, this file may be used under the terms of the GNU | ||||
** General Public License version 3 or (at your option) any later version | ||||
** approved by the KDE Free Qt Foundation. The licenses are as published by | ||||
** the Free Software Foundation and appearing in the file LICENSE.GPL3 | ||||
** included in the packaging of this file. Please review the following | ||||
** information to ensure the GNU General Public License requirements will | ||||
** be met: https://www.gnu.org/licenses/gpl-3.0.html. | ||||
** | ||||
** $QT_END_LICENSE$ | ||||
** | ||||
****************************************************************************/ | ||||
#include "chart.h" | ||||
#include <QtCharts/QAbstractAxis> | ||||
#include <QtCharts/QSplineSeries> | ||||
#include <QtCharts/QValueAxis> | ||||
#include <QtCore/QTime> | ||||
#include <QtCore/QDebug> | ||||
Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags): | ||||
QChart(QChart::ChartTypeCartesian, parent, wFlags), | ||||
m_series(0), | ||||
m_axis(new QValueAxis), | ||||
m_step(0), | ||||
m_x(5), | ||||
m_y(1) | ||||
{ | ||||
qsrand((uint) QTime::currentTime().msec()); | ||||
QObject::connect(&m_timer, SIGNAL(timeout()), this, SLOT(handleTimeout())); | ||||
m_timer.setInterval(1000); | ||||
m_series = new QSplineSeries(this); | ||||
QPen green(Qt::red); | ||||
green.setWidth(3); | ||||
m_series->setPen(green); | ||||
m_series->append(m_x, m_y); | ||||
addSeries(m_series); | ||||
createDefaultAxes(); | ||||
setAxisX(m_axis, m_series); | ||||
m_axis->setTickCount(5); | ||||
axisX()->setRange(0, 10); | ||||
axisY()->setRange(-5, 10); | ||||
m_timer.start(); | ||||
} | ||||
Chart::~Chart() | ||||
{ | ||||
} | ||||
void Chart::handleTimeout() | ||||
{ | ||||
qreal x = plotArea().width() / m_axis->tickCount(); | ||||
qreal y = (m_axis->max() - m_axis->min()) / m_axis->tickCount(); | ||||
m_x += y; | ||||
m_y = qrand() % 5 - 2.5; | ||||
m_series->append(m_x, m_y); | ||||
scroll(x, 0); | ||||
if (m_x == 100) | ||||
m_timer.stop(); | ||||
} | ||||