<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>chartview.cpp Example File | Qt Charts 5.9</title>
<link rel="stylesheet" type="text/css" href="style/offline-simple.css" />
<script type="text/javascript">
document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css");
// loading style sheet breaks anchors that were jumped to before
// so force jumping to anchor again
setTimeout(function() {
var anchor = location.hash;
// need to jump to different anchor first (e.g. none)
location.hash = "#";
setTimeout(function() {
location.hash = anchor;
}, 0);
}, 0);
</script>
</head>
<body>
<div class="header" id="qtdocheader">
<div class="main">
<div class="main-rounded">
<div class="navigationbar">
<table><tr>
<td >Qt 5.9</td><td ><a href="qtcharts-index.html">Qt Charts</a></td><td ><a href="qtcharts-polarchart-example.html">Polar Chart Example</a></td><td >chartview.cpp Example File</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
</tr></table>
</div>
</div>
<div class="content">
<div class="line">
<div class="content mainContent">
<div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">chartview.cpp Example File</h1>
<span class="subtitle">polarchart/chartview.cpp</span>
<!-- $$$polarchart/chartview.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">
<span class="comment">/****************************************************************************
**
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include "chartview.h"</span>
<span class="preprocessor">#include <QtGui/QMouseEvent></span>
<span class="preprocessor">#include <QtCore/QDebug></span>
<span class="preprocessor">#include <QtCharts/QAbstractAxis></span>
<span class="preprocessor">#include <QtCharts/QValueAxis></span>
QT_CHARTS_USE_NAMESPACE
ChartView<span class="operator">::</span>ChartView(<span class="type">QWidget</span> <span class="operator">*</span>parent)
: <span class="type"><a href="qchartview.html">QChartView</a></span>(parent)
{
}
<span class="type">void</span> ChartView<span class="operator">::</span>keyPressEvent(<span class="type">QKeyEvent</span> <span class="operator">*</span>event)
{
<span class="keyword">switch</span> (event<span class="operator">-</span><span class="operator">></span>key()) {
<span class="keyword">case</span> <span class="type">Qt</span><span class="operator">::</span>Key_Plus:
chart()<span class="operator">-</span><span class="operator">></span>zoomIn();
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="type">Qt</span><span class="operator">::</span>Key_Minus:
chart()<span class="operator">-</span><span class="operator">></span>zoomOut();
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="type">Qt</span><span class="operator">::</span>Key_Left:
chart()<span class="operator">-</span><span class="operator">></span>scroll(<span class="operator">-</span><span class="number">1.0</span><span class="operator">,</span> <span class="number">0</span>);
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="type">Qt</span><span class="operator">::</span>Key_Right:
chart()<span class="operator">-</span><span class="operator">></span>scroll(<span class="number">1.0</span><span class="operator">,</span> <span class="number">0</span>);
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="type">Qt</span><span class="operator">::</span>Key_Up:
chart()<span class="operator">-</span><span class="operator">></span>scroll(<span class="number">0</span><span class="operator">,</span> <span class="number">1.0</span>);
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="type">Qt</span><span class="operator">::</span>Key_Down:
chart()<span class="operator">-</span><span class="operator">></span>scroll(<span class="number">0</span><span class="operator">,</span> <span class="operator">-</span><span class="number">1.0</span>);
<span class="keyword">break</span>;
<span class="keyword">case</span> <span class="type">Qt</span><span class="operator">::</span>Key_Space:
switchChartType();
<span class="keyword">break</span>;
<span class="keyword">default</span>:
<span class="type">QGraphicsView</span><span class="operator">::</span>keyPressEvent(event);
<span class="keyword">break</span>;
}
}
<span class="type">void</span> ChartView<span class="operator">::</span>switchChartType()
{
<span class="type"><a href="qchart.html">QChart</a></span> <span class="operator">*</span>newChart;
<span class="type"><a href="qchart.html">QChart</a></span> <span class="operator">*</span>oldChart <span class="operator">=</span> chart();
<span class="keyword">if</span> (oldChart<span class="operator">-</span><span class="operator">></span>chartType() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qchart.html">QChart</a></span><span class="operator">::</span>ChartTypeCartesian)
newChart <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qpolarchart.html">QPolarChart</a></span>();
<span class="keyword">else</span>
newChart <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qchart.html">QChart</a></span>();
<span class="comment">// Move series and axes from old chart to new one</span>
<span class="keyword">const</span> <span class="type">QList</span><span class="operator"><</span><span class="type"><a href="qabstractseries.html">QAbstractSeries</a></span> <span class="operator">*</span><span class="operator">></span> seriesList <span class="operator">=</span> oldChart<span class="operator">-</span><span class="operator">></span>series();
<span class="keyword">const</span> <span class="type">QList</span><span class="operator"><</span><span class="type"><a href="qabstractaxis.html">QAbstractAxis</a></span> <span class="operator">*</span><span class="operator">></span> axisList <span class="operator">=</span> oldChart<span class="operator">-</span><span class="operator">></span>axes();
<span class="type">QList</span><span class="operator"><</span><span class="type">QPair</span><span class="operator"><</span><span class="type">qreal</span><span class="operator">,</span> <span class="type">qreal</span><span class="operator">></span> <span class="operator">></span> axisRanges;
<span class="keyword">for</span> (<span class="type"><a href="qabstractaxis.html">QAbstractAxis</a></span> <span class="operator">*</span>axis : axisList) {
<span class="type"><a href="qvalueaxis.html">QValueAxis</a></span> <span class="operator">*</span>valueAxis <span class="operator">=</span> <span class="keyword">static_cast</span><span class="operator"><</span><span class="type"><a href="qvalueaxis.html">QValueAxis</a></span> <span class="operator">*</span><span class="operator">></span>(axis);
axisRanges<span class="operator">.</span>append(<span class="type">QPair</span><span class="operator"><</span><span class="type">qreal</span><span class="operator">,</span> <span class="type">qreal</span><span class="operator">></span>(valueAxis<span class="operator">-</span><span class="operator">></span>min()<span class="operator">,</span> valueAxis<span class="operator">-</span><span class="operator">></span>max()));
}
<span class="keyword">for</span> (<span class="type"><a href="qabstractseries.html">QAbstractSeries</a></span> <span class="operator">*</span>series : seriesList)
oldChart<span class="operator">-</span><span class="operator">></span>removeSeries(series);
<span class="keyword">for</span> (<span class="type"><a href="qabstractaxis.html">QAbstractAxis</a></span> <span class="operator">*</span>axis : axisList) {
oldChart<span class="operator">-</span><span class="operator">></span>removeAxis(axis);
newChart<span class="operator">-</span><span class="operator">></span>addAxis(axis<span class="operator">,</span> axis<span class="operator">-</span><span class="operator">></span>alignment());
}
<span class="keyword">for</span> (<span class="type"><a href="qabstractseries.html">QAbstractSeries</a></span> <span class="operator">*</span>series : seriesList) {
newChart<span class="operator">-</span><span class="operator">></span>addSeries(series);
<span class="keyword">for</span> (<span class="type"><a href="qabstractaxis.html">QAbstractAxis</a></span> <span class="operator">*</span>axis : axisList)
series<span class="operator">-</span><span class="operator">></span>attachAxis(axis);
}
<span class="type">int</span> count <span class="operator">=</span> <span class="number">0</span>;
<span class="keyword">for</span> (<span class="type"><a href="qabstractaxis.html">QAbstractAxis</a></span> <span class="operator">*</span>axis : axisList) {
axis<span class="operator">-</span><span class="operator">></span>setRange(axisRanges<span class="operator">[</span>count<span class="operator">]</span><span class="operator">.</span>first<span class="operator">,</span> axisRanges<span class="operator">[</span>count<span class="operator">]</span><span class="operator">.</span>second);
count<span class="operator">+</span><span class="operator">+</span>;
}
newChart<span class="operator">-</span><span class="operator">></span>setTitle(oldChart<span class="operator">-</span><span class="operator">></span>title());
setChart(newChart);
<span class="keyword">delete</span> oldChart;
}
</pre>
</div>
<!-- @@@polarchart/chartview.cpp -->
</div>
</div>
</div>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd.
Documentation contributions included herein are the copyrights of
their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property
of their respective owners. </p>
</div>
</body>
</html>
distrib
>
Mageia
>
6
>
x86_64
>
media
>
core-updates
>
by-pkgid
>
19952c5e751bf7e3108c3c59625b0f35
>
files
>
397
