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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!-- Tumbler.qml -->
  <title>Tumbler QML Type | Qt Quick Extras 5.5</title>
  <link rel="stylesheet" type="text/css" href="style/offline.css" />
</head>
<body>
<div class="header" id="qtdocheader">
    <div class="main">
    <div class="main-rounded">
        <div class="navigationbar">
        <ul>
<li>Qt 5.5</li>
<li><a href="qtquickextras-index.html">Qt Quick Extras</a></li>
<li><a href="qtquick-extras-qmlmodule.html">QML Types</a></li>
<li>Tumbler QML Type</li>
<li id="buildversion">Qt 5.5.1 Reference Documentation</li>
    </ul>
    </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="#properties">Properties</a></li>
<li class="level1"><a href="#methods">Methods</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
<li class="level2"><a href="#limitations">Limitations</a></li>
</ul>
</div>
<div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">Tumbler QML Type</h1>
<span class="subtitle"></span>
<!-- $$$Tumbler-brief -->
<p>A control that can have several spinnable wheels, each with items that can be selected. <a href="#details">More...</a></p>
<!-- @@@Tumbler -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Import Statement:</td><td class="memItemRight bottomAlign"> import QtQuick.Extras 1.4</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign">  Qt 5.5</td></tr></table></div><ul>
<li><a href="qml-qtquick-extras-tumbler-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="properties"></a>
<h2 id="properties">Properties</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtquick-extras-tumbler.html#columnCount-prop">columnCount</a></b></b> : int</li>
</ul>
<a name="methods"></a>
<h2 id="methods">Methods</h2>
<ul>
<li class="fn">TumblerColumn <b><b><a href="qml-qtquick-extras-tumbler.html#addColumn-method">addColumn</a></b></b>(TumblerColumn <i> column</i>)</li>
<li class="fn">int <b><b><a href="qml-qtquick-extras-tumbler.html#currentIndexAt-method">currentIndexAt</a></b></b>(int <i> columnIndex</i>)</li>
<li class="fn">TumblerColumn <b><b><a href="qml-qtquick-extras-tumbler.html#getColumn-method">getColumn</a></b></b>(int <i> columnIndex</i>)</li>
<li class="fn">TumblerColumn <b><b><a href="qml-qtquick-extras-tumbler.html#insertColumn-method">insertColumn</a></b></b>(int <i> index</i>, TumblerColumn <i> column</i>)</li>
<li class="fn">void <b><b><a href="qml-qtquick-extras-tumbler.html#setCurrentIndexAt-method">setCurrentIndexAt</a></b></b>(int <i> columnIndex</i>, int <i> itemIndex</i>)</li>
</ul>
<!-- $$$Tumbler-description -->
<a name="details"></a>
<h2 id="details">Detailed Description</h2>
</p>
<p class="centerAlign"><img src="images/tumbler.png" alt="A Tumbler" /></p><p><b>Note: </b>Tumbler requires Qt 5.5&#x2e;0 or later.</p><p>The Tumbler control is used with one or more <a href="qml-qtquick-extras-tumblercolumn.html">TumblerColumn</a> items, which define the content of each column:</p>
<pre class="cpp">Tumbler {
    TumblerColumn {
        model: <span class="number">5</span>
    }
    TumblerColumn {
        model: <span class="operator">[</span><span class="number">0</span><span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">2</span><span class="operator">,</span> <span class="number">3</span><span class="operator">,</span> <span class="number">4</span><span class="operator">]</span>
    }
    TumblerColumn {
        model: <span class="operator">[</span><span class="string">&quot;A&quot;</span><span class="operator">,</span> <span class="string">&quot;B&quot;</span><span class="operator">,</span> <span class="string">&quot;C&quot;</span><span class="operator">,</span> <span class="string">&quot;D&quot;</span><span class="operator">,</span> <span class="string">&quot;E&quot;</span><span class="operator">]</span>
    }
}</pre>
<p>You can also use a traditional model with roles:</p>
<pre class="cpp">Rectangle {
    width: <span class="number">220</span>
    height: <span class="number">350</span>
    color: <span class="string">&quot;#494d53&quot;</span>

    ListModel {
        id: listModel

        ListElement {
            foo: <span class="string">&quot;A&quot;</span>
            bar: <span class="string">&quot;B&quot;</span>
            baz: <span class="string">&quot;C&quot;</span>
        }
        ListElement {
            foo: <span class="string">&quot;A&quot;</span>
            bar: <span class="string">&quot;B&quot;</span>
            baz: <span class="string">&quot;C&quot;</span>
        }
        ListElement {
            foo: <span class="string">&quot;A&quot;</span>
            bar: <span class="string">&quot;B&quot;</span>
            baz: <span class="string">&quot;C&quot;</span>
        }
    }

    Tumbler {
        anchors<span class="operator">.</span>centerIn: parent

        TumblerColumn {
            model: listModel
            role: <span class="string">&quot;foo&quot;</span>
        }
        TumblerColumn {
            model: listModel
            role: <span class="string">&quot;bar&quot;</span>
        }
        TumblerColumn {
            model: listModel
            role: <span class="string">&quot;baz&quot;</span>
        }
    }
}</pre>
<a name="limitations"></a>
<h2 id="limitations">Limitations</h2>
<p>For technical reasons, the model count must be equal to or greater than visibleItemCount plus one. The visibleItemCount must also be an odd number.</p>
<p>You can create a custom appearance for a Tumbler by assigning a TumblerStyle. To style individual columns, use the <a href="qml-qtquick-extras-tumblercolumn.html#delegate-prop">delegate</a> and <a href="qml-qtquick-extras-tumblercolumn.html#highlight-prop">highlight</a> properties of <a href="qml-qtquick-extras-tumblercolumn.html">TumblerColumn</a>.</p>
<!-- @@@Tumbler -->
<h2>Property Documentation</h2>
<!-- $$$columnCount -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="columnCount-prop"><td class="tblQmlPropNode"><p><a name="columnCount-prop"></a><span class="qmlreadonly">read-only</span><span class="name">columnCount</span> : <span class="type">int</span></p></td></tr></table></div></div><div class="qmldoc"><p>The number of columns in the Tumbler.</p>
</div></div><!-- @@@columnCount -->
<br/>
<h2>Method Documentation</h2>
<!-- $$$addColumn -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="addColumn-method"><td class="tblQmlFuncNode"><p><a name="addColumn-method"></a><span class="type"><a href="qml-qtquick-extras-tumblercolumn.html">TumblerColumn</a></span> <span class="name">addColumn</span>(<span class="type"><a href="qml-qtquick-extras-tumblercolumn.html">TumblerColumn</a></span><i> column</i>)</p></td></tr></table></div></div><div class="qmldoc"><p>Adds a <i>column</i> and returns the added column.</p>
<p>The <i>column</i> argument can be an instance of <a href="qml-qtquick-extras-tumblercolumn.html">TumblerColumn</a>, or a <a href="../qtqml/qml-qtqml-component.html">Component</a>. The component has to contain a <a href="qml-qtquick-extras-tumblercolumn.html">TumblerColumn</a>. Otherwise <code>null</code> is returned.</p>
</div></div><!-- @@@addColumn -->
<br/>
<!-- $$$currentIndexAt -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="currentIndexAt-method"><td class="tblQmlFuncNode"><p><a name="currentIndexAt-method"></a><span class="type">int</span> <span class="name">currentIndexAt</span>(<span class="type">int</span><i> columnIndex</i>)</p></td></tr></table></div></div><div class="qmldoc"><p>Returns the current index of the column at <i>columnIndex</i>, or <code>null</code> if the <i>index</i> is invalid.</p>
</div></div><!-- @@@currentIndexAt -->
<br/>
<!-- $$$getColumn -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="getColumn-method"><td class="tblQmlFuncNode"><p><a name="getColumn-method"></a><span class="type"><a href="qml-qtquick-extras-tumblercolumn.html">TumblerColumn</a></span> <span class="name">getColumn</span>(<span class="type">int</span><i> columnIndex</i>)</p></td></tr></table></div></div><div class="qmldoc"><p>Returns the column at <i>columnIndex</i> or <code>null</code> if the index is invalid.</p>
</div></div><!-- @@@getColumn -->
<br/>
<!-- $$$insertColumn -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="insertColumn-method"><td class="tblQmlFuncNode"><p><a name="insertColumn-method"></a><span class="type"><a href="qml-qtquick-extras-tumblercolumn.html">TumblerColumn</a></span> <span class="name">insertColumn</span>(<span class="type">int</span><i> index</i>, <span class="type"><a href="qml-qtquick-extras-tumblercolumn.html">TumblerColumn</a></span><i> column</i>)</p></td></tr></table></div></div><div class="qmldoc"><p>Inserts a <i>column</i> at the given <i>index</i> and returns the inserted column.</p>
<p>The <i>column</i> argument can be an instance of <a href="qml-qtquick-extras-tumblercolumn.html">TumblerColumn</a>, or a <a href="../qtqml/qml-qtqml-component.html">Component</a>. The component has to contain a <a href="qml-qtquick-extras-tumblercolumn.html">TumblerColumn</a>. Otherwise, <code>null</code> is returned.</p>
</div></div><!-- @@@insertColumn -->
<br/>
<!-- $$$setCurrentIndexAt -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="setCurrentIndexAt-method"><td class="tblQmlFuncNode"><p><a name="setCurrentIndexAt-method"></a><span class="type">void</span> <span class="name">setCurrentIndexAt</span>(<span class="type">int</span><i> columnIndex</i>, <span class="type">int</span><i> itemIndex</i>)</p></td></tr></table></div></div><div class="qmldoc"><p>Sets the current index of the column at <i>columnIndex</i> to <i>itemIndex</i>.</p>
<p>Does nothing if <i>columnIndex</i> or <i>itemIndex</i> are invalid.</p>
</div></div><!-- @@@setCurrentIndexAt -->
<br/>
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