<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- styling.qdoc --> <title>Use Case - Style And Theme Support | Qt 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 ><a href="index.html">Qt 5.9</a></td><td >Use Case - Style And Theme Support</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="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#using-the-styling-qml-types">Using the Styling QML Types</a></li> <li class="level1"><a href="#accessing-the-system-palette">Accessing the System Palette</a></li> </ul> </div> <div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">Use Case - Style And Theme Support</h1> <span class="subtitle"></span> <!-- $$$qtquick-usecase-styling.html-description --> <div class="descr"> <a name="details"></a> <p>Styling with QML involves creating a visual type and binding that to a property or by directly assigning a value to a property. For types that incorporate Qt Quick's delegates the visual type attaches to the <i>delegate</i> property.</p> <p>When using Qt Quick Controls, the controls automatically set the appropriate style from the respective <a href="supported-platforms.html">platforms</a>.</p> <a name="using-the-styling-qml-types"></a> <h2 id="using-the-styling-qml-types">Using the Styling QML Types</h2> <p>The controls have a <code>style</code> property to which the <i>styling types</i> bind. The controls have a corresponding styling type from the Qt Quick Controls Styles module. For example, Button has a ButtonStyle type and Menu has a MenuStyle type. The styling types provide properties applicable to their respective controls such as the background, label, or for some controls, the cursor appearance.</p> <pre class="qml"> <span class="type">Button</span> { <span class="name">text</span>: <span class="name">qsTr</span>(<span class="string">"Hello World"</span>) <span class="name">style</span>: <span class="name">ButtonStyle</span> { <span class="name">background</span>: <span class="name">Rectangle</span> { <span class="name">implicitWidth</span>: <span class="number">100</span> <span class="name">implicitHeight</span>: <span class="number">25</span> <span class="name">border</span>.width: <span class="name">control</span>.<span class="name">activeFocus</span> ? <span class="number">2</span> : <span class="number">1</span> <span class="name">border</span>.color: <span class="string">"#FFF"</span> <span class="name">radius</span>: <span class="number">4</span> <span class="name">gradient</span>: <span class="name">Gradient</span> { <span class="type">GradientStop</span> { <span class="name">position</span>: <span class="number">0</span> ; <span class="name">color</span>: <span class="name">control</span>.<span class="name">pressed</span> ? <span class="string">"#ccc"</span> : <span class="string">"#fff"</span> } <span class="type">GradientStop</span> { <span class="name">position</span>: <span class="number">1</span> ; <span class="name">color</span>: <span class="name">control</span>.<span class="name">pressed</span> ? <span class="string">"#000"</span> : <span class="string">"#fff"</span> } } } } </pre> <p><b>Note: </b>Qt Quick Controls Styles was introduced in Qt 5.1 and requires Qt Quick 2.1.</p><a name="accessing-the-system-palette"></a> <h2 id="accessing-the-system-palette">Accessing the System Palette</h2> <p>The SystemPalette type provides information about the system's palette information. QML applications can use this information to set the appearance of visual types to match the native look-and-feel. In addition, on <a href="supported-platforms.html#desktop-platforms">desktop</a> platforms, different color palettes are employed when changing states, for example, when the application loses keyboard focus.</p> <p>When using the controls, the system colors are already used.</p> </div> <!-- @@@qtquick-usecase-styling.html --> </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. 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