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<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>
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<h1 class="title">Use Case - Style And Theme Support</h1>
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<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 <a href="../qtquick/qtquick-modelviewsdata-modelview.html">delegates</a> the visual type attaches to the <i>delegate</i> property.</p>
<p>When using <a href="../qtquickcontrols/qtquickcontrols-index.html">Qt Quick Controls</a>, 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 <a href="../qtquickcontrols/qtquickcontrols-index.html">controls</a> have a <code>style</code> property to which the <i>styling types</i> bind. The controls have a corresponding styling type from the <a href="../qtquickcontrols/qtquick-controls-styles-qmlmodule.html">Qt Quick Controls Styles</a> module. For example, <a href="../qtquickcontrols/qml-qtquick-controls-button.html">Button</a> has a <a href="../qtquickcontrols/qml-qtquick-controls-styles-buttonstyle.html">ButtonStyle</a> type and <a href="../qtquickcontrols/qml-qtquick-controls-menu.html">Menu</a> has a <a href="../qtquickcontrols/qml-qtquick-controls-styles-menustyle.html">MenuStyle</a> 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"><a href="../qtquickcontrols/qml-qtquick-controls-button.html">Button</a></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"><a href="../qtquick/qml-qtquick-gradientstop.html">GradientStop</a></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"><a href="../qtquick/qml-qtquick-gradientstop.html">GradientStop</a></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><a href="../qtquickcontrols/qtquick-controls-styles-qmlmodule.html">Qt Quick Controls Styles</a> was introduced in Qt 5.1 and requires <a href="../qtquick/qtquick-index.html">Qt Quick</a> 2.1.</p><a name="accessing-the-system-palette"></a>
<h2 id="accessing-the-system-palette">Accessing the System Palette</h2>
<p>The <a href="../qtquick/qml-qtquick-systempalette.html">SystemPalette</a> 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 <a href="../qtquickcontrols/qtquickcontrols-index.html">controls</a>, the system colors are already used.</p>
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