<?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>main.cpp Example File | Qt Widgets 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="qtwidgets-index.html">Qt Widgets</a></td><td ><a href="qtwidgets-statemachine-trafficlight-example.html">Traffic Light Example</a></td><td >main.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">main.cpp Example File</h1>
<span class="subtitle">statemachine/trafficlight/main.cpp</span>
<!-- $$$statemachine/trafficlight/main.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 QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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.
**
** BSD License Usage
** Alternatively, 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include <QtWidgets></span>
<span class="keyword">class</span> LightWidget : <span class="keyword">public</span> <span class="type"><a href="qwidget.html">QWidget</a></span>
{
Q_OBJECT
Q_PROPERTY(bool on READ isOn WRITE setOn)
<span class="keyword">public</span>:
LightWidget(<span class="keyword">const</span> <span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> <span class="operator">&</span>color<span class="operator">,</span> <span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent <span class="operator">=</span> <span class="number">0</span>)
: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)<span class="operator">,</span> m_color(color)<span class="operator">,</span> m_on(<span class="keyword">false</span>) {}
bool isOn() <span class="keyword">const</span>
{ <span class="keyword">return</span> m_on; }
<span class="type">void</span> setOn(bool on)
{
<span class="keyword">if</span> (on <span class="operator">=</span><span class="operator">=</span> m_on)
<span class="keyword">return</span>;
m_on <span class="operator">=</span> on;
update();
}
<span class="keyword">public</span> <span class="keyword">slots</span>:
<span class="type">void</span> turnOff() { setOn(<span class="keyword">false</span>); }
<span class="type">void</span> turnOn() { setOn(<span class="keyword">true</span>); }
<span class="keyword">protected</span>:
<span class="type">void</span> paintEvent(<span class="type"><a href="../qtgui/qpaintevent.html">QPaintEvent</a></span> <span class="operator">*</span>) override
{
<span class="keyword">if</span> (<span class="operator">!</span>m_on)
<span class="keyword">return</span>;
<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span> painter(<span class="keyword">this</span>);
painter<span class="operator">.</span>setRenderHint(<span class="type"><a href="../qtgui/qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing);
painter<span class="operator">.</span>setBrush(m_color);
painter<span class="operator">.</span>drawEllipse(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> width()<span class="operator">,</span> height());
}
<span class="keyword">private</span>:
<span class="type"><a href="../qtgui/qcolor.html">QColor</a></span> m_color;
bool m_on;
};
<span class="keyword">class</span> TrafficLightWidget : <span class="keyword">public</span> <span class="type"><a href="qwidget.html">QWidget</a></span>
{
<span class="keyword">public</span>:
TrafficLightWidget(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent <span class="operator">=</span> <span class="number">0</span>)
: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
{
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>vbox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(<span class="keyword">this</span>);
m_red <span class="operator">=</span> <span class="keyword">new</span> LightWidget(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>red);
vbox<span class="operator">-</span><span class="operator">></span>addWidget(m_red);
m_yellow <span class="operator">=</span> <span class="keyword">new</span> LightWidget(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>yellow);
vbox<span class="operator">-</span><span class="operator">></span>addWidget(m_yellow);
m_green <span class="operator">=</span> <span class="keyword">new</span> LightWidget(<span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>green);
vbox<span class="operator">-</span><span class="operator">></span>addWidget(m_green);
<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span> pal <span class="operator">=</span> palette();
pal<span class="operator">.</span>setColor(<span class="type"><a href="../qtgui/qpalette.html">QPalette</a></span><span class="operator">::</span>Background<span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>black);
setPalette(pal);
setAutoFillBackground(<span class="keyword">true</span>);
}
LightWidget <span class="operator">*</span>redLight() <span class="keyword">const</span>
{ <span class="keyword">return</span> m_red; }
LightWidget <span class="operator">*</span>yellowLight() <span class="keyword">const</span>
{ <span class="keyword">return</span> m_yellow; }
LightWidget <span class="operator">*</span>greenLight() <span class="keyword">const</span>
{ <span class="keyword">return</span> m_green; }
<span class="keyword">private</span>:
LightWidget <span class="operator">*</span>m_red;
LightWidget <span class="operator">*</span>m_yellow;
LightWidget <span class="operator">*</span>m_green;
};
<span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>createLightState(LightWidget <span class="operator">*</span>light<span class="operator">,</span> <span class="type">int</span> duration<span class="operator">,</span> <span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>parent <span class="operator">=</span> <span class="number">0</span>)
{
<span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>lightState <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qstate.html">QState</a></span>(parent);
<span class="type"><a href="../qtcore/qtimer.html">QTimer</a></span> <span class="operator">*</span>timer <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qtimer.html">QTimer</a></span>(lightState);
timer<span class="operator">-</span><span class="operator">></span>setInterval(duration);
timer<span class="operator">-</span><span class="operator">></span>setSingleShot(<span class="keyword">true</span>);
<span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>timing <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qstate.html">QState</a></span>(lightState);
<span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>connect(timing<span class="operator">,</span> SIGNAL(entered())<span class="operator">,</span> light<span class="operator">,</span> SLOT(turnOn()));
<span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>connect(timing<span class="operator">,</span> SIGNAL(entered())<span class="operator">,</span> timer<span class="operator">,</span> SLOT(start()));
<span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>connect(timing<span class="operator">,</span> SIGNAL(exited())<span class="operator">,</span> light<span class="operator">,</span> SLOT(turnOff()));
<span class="type"><a href="../qtcore/qfinalstate.html">QFinalState</a></span> <span class="operator">*</span>done <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qfinalstate.html">QFinalState</a></span>(lightState);
timing<span class="operator">-</span><span class="operator">></span>addTransition(timer<span class="operator">,</span> SIGNAL(timeout())<span class="operator">,</span> done);
lightState<span class="operator">-</span><span class="operator">></span>setInitialState(timing);
<span class="keyword">return</span> lightState;
}
<span class="keyword">class</span> TrafficLight : <span class="keyword">public</span> <span class="type"><a href="qwidget.html">QWidget</a></span>
{
<span class="keyword">public</span>:
TrafficLight(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent <span class="operator">=</span> <span class="number">0</span>)
: <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)
{
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>vbox <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(<span class="keyword">this</span>);
TrafficLightWidget <span class="operator">*</span>widget <span class="operator">=</span> <span class="keyword">new</span> TrafficLightWidget();
vbox<span class="operator">-</span><span class="operator">></span>addWidget(widget);
vbox<span class="operator">-</span><span class="operator">></span>setMargin(<span class="number">0</span>);
<span class="type"><a href="../qtcore/qstatemachine.html">QStateMachine</a></span> <span class="operator">*</span>machine <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtcore/qstatemachine.html">QStateMachine</a></span>(<span class="keyword">this</span>);
<span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>redGoingYellow <span class="operator">=</span> createLightState(widget<span class="operator">-</span><span class="operator">></span>redLight()<span class="operator">,</span> <span class="number">3000</span>);
redGoingYellow<span class="operator">-</span><span class="operator">></span>setObjectName(<span class="string">"redGoingYellow"</span>);
<span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>yellowGoingGreen <span class="operator">=</span> createLightState(widget<span class="operator">-</span><span class="operator">></span>yellowLight()<span class="operator">,</span> <span class="number">1000</span>);
yellowGoingGreen<span class="operator">-</span><span class="operator">></span>setObjectName(<span class="string">"yellowGoingGreen"</span>);
redGoingYellow<span class="operator">-</span><span class="operator">></span>addTransition(redGoingYellow<span class="operator">,</span> SIGNAL(finished())<span class="operator">,</span> yellowGoingGreen);
<span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>greenGoingYellow <span class="operator">=</span> createLightState(widget<span class="operator">-</span><span class="operator">></span>greenLight()<span class="operator">,</span> <span class="number">3000</span>);
greenGoingYellow<span class="operator">-</span><span class="operator">></span>setObjectName(<span class="string">"greenGoingYellow"</span>);
yellowGoingGreen<span class="operator">-</span><span class="operator">></span>addTransition(yellowGoingGreen<span class="operator">,</span> SIGNAL(finished())<span class="operator">,</span> greenGoingYellow);
<span class="type"><a href="../qtcore/qstate.html">QState</a></span> <span class="operator">*</span>yellowGoingRed <span class="operator">=</span> createLightState(widget<span class="operator">-</span><span class="operator">></span>yellowLight()<span class="operator">,</span> <span class="number">1000</span>);
yellowGoingRed<span class="operator">-</span><span class="operator">></span>setObjectName(<span class="string">"yellowGoingRed"</span>);
greenGoingYellow<span class="operator">-</span><span class="operator">></span>addTransition(greenGoingYellow<span class="operator">,</span> SIGNAL(finished())<span class="operator">,</span> yellowGoingRed);
yellowGoingRed<span class="operator">-</span><span class="operator">></span>addTransition(yellowGoingRed<span class="operator">,</span> SIGNAL(finished())<span class="operator">,</span> redGoingYellow);
machine<span class="operator">-</span><span class="operator">></span>addState(redGoingYellow);
machine<span class="operator">-</span><span class="operator">></span>addState(yellowGoingGreen);
machine<span class="operator">-</span><span class="operator">></span>addState(greenGoingYellow);
machine<span class="operator">-</span><span class="operator">></span>addState(yellowGoingRed);
machine<span class="operator">-</span><span class="operator">></span>setInitialState(redGoingYellow);
machine<span class="operator">-</span><span class="operator">></span>start();
}
};
<span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span><span class="operator">*</span>argv)
{
<span class="type"><a href="qapplication.html">QApplication</a></span> app(argc<span class="operator">,</span> argv);
TrafficLight widget;
widget<span class="operator">.</span>resize(<span class="number">110</span><span class="operator">,</span> <span class="number">300</span>);
widget<span class="operator">.</span>show();
<span class="keyword">return</span> app<span class="operator">.</span>exec();
}
<span class="preprocessor">#include "main.moc"</span>
</pre>
</div>
<!-- @@@statemachine/trafficlight/main.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
>
armv5tl
>
media
>
core-updates
>
by-pkgid
>
768f7d9f703884aa2562bf0a651086df
>
files
>
4270
