<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!-- qtlabscontrols-highdpi.qdoc -->
<title>High-DPI Support in Qt Labs Controls | Qt Labs Controls 5.6</title>
<link rel="stylesheet" type="text/css" href="style/offline-simple.css" />
<script type="text/javascript">
window.onload = function(){document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css");};
</script>
</head>
<body>
<div class="header" id="qtdocheader">
<div class="main">
<div class="main-rounded">
<div class="navigationbar">
<table><tr>
<td >Qt 5.6</td><td ><a href="qtlabscontrols-index.html">Qt Labs Controls</a></td><td >High-DPI Support in Qt Labs Controls</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.6.2 Reference Documentation</td>
</tr></table>
</div>
</div>
<div class="content">
<div class="line">
<div class="content mainContent">
<div class="sidebar">
<div class="toc">
<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#related-information">Related Information</a></li>
</ul>
</div>
<div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">High-DPI Support in Qt Labs Controls</h1>
<span class="subtitle"></span>
<!-- $$$qtlabscontrols-highdpi.html-description -->
<div class="descr"> <a name="details"></a>
<p>Qt Labs Controls support Qt's cross-platform high-DPI scaling introduced in Qt 5.6. The feature is opt-in, and can be enabled by setting the <code>Qt::AA_EnableHighDpiScaling</code> application attribute in C++ before QGuiApplication is constructed:</p>
<pre class="cpp">
<span class="preprocessor">#include <QGuiApplication></span>
<span class="preprocessor">#include <QQmlApplicationEngine></span>
<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>argv<span class="operator">[</span><span class="operator">]</span>)
{
<span class="type">QGuiApplication</span><span class="operator">::</span>setAttribute(<span class="type">Qt</span><span class="operator">::</span>AA_EnableHighDpiScaling); <span class="comment">// <--</span>
<span class="type">QGuiApplication</span> app(argc<span class="operator">,</span> argv);
<span class="type">QQmlApplicationEngine</span> engine;
engine<span class="operator">.</span>load(<span class="type">QUrl</span>(<span class="type">QStringLiteral</span>(<span class="string">"qrc:/main.qml"</span>)));
<span class="keyword">return</span> app<span class="operator">.</span>exec();
}
</pre>
<p>Alternatively, an environment variable <code>QT_AUTO_SCREEN_SCALE_FACTOR=1</code> can be set to enable automatic high-DPI scaling.</p>
<p><b>Warning:</b> Qt Quick Controls 1.x are not compatible with Qt's automatic high-DPI scaling. There is currently no available solution for high-DPI support in applications wishing to mix Qt Quick Controls and Qt Labs Controls.</p>
<a name="related-information"></a>
<h2 id="related-information">Related Information</h2>
<ul>
<li>High DPI Displays</li>
<li>Scalability</li>
</ul>
</div>
<!-- @@@qtlabscontrols-highdpi.html -->
</div>
</div>
</div>
</div>
</div>
<div class="footer">
<p>
<acronym title="Copyright">©</acronym> 2016 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-release
>
by-pkgid
>
886c2ed147b4d6954d2d9fb23759f3ff
>
files
>
305
