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<td >Qt 5.9</td><td ><a href="qtquickcontrols2-index.html">Qt Quick Controls 2</a></td><td ><a href="qtquick-controls2-qmlmodule.html">QML Types</a></td><td >TabBar QML Type</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.5 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
<ul>
<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
<li class="level2"><a href="#resizing-tabs">Resizing Tabs</a></li>
<li class="level2"><a href="#flickable-tabs">Flickable Tabs</a></li>
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<h1 class="title">TabBar QML Type</h1>
<span class="subtitle"></span>
<!-- $$$TabBar-brief -->
<p>Allows the user to switch between different views or subtasks. <a href="#details">More...</a></p>
<!-- @@@TabBar -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Import Statement:</td><td class="memItemRight bottomAlign"> import QtQuick.Controls 2.2</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> Qt 5.7</td></tr></table></div><ul>
<li><a href="qml-qtquick-controls2-tabbar-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="properties"></a>
<h2 id="properties">Properties</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtquick-controls2-tabbar.html#contentHeight-prop">contentHeight</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtquick-controls2-tabbar.html#contentWidth-prop">contentWidth</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtquick-controls2-tabbar.html#position-prop">position</a></b></b> : enumeration</li>
</ul>
<!-- $$$TabBar-description -->
<a name="details"></a>
<h2 id="details">Detailed Description</h2>
<p><a href="qtquickcontrols2-navigation.html#tabbar">TabBar</a> provides a tab-based navigation model.</p>
<p class="centerAlign"><img src="images/qtquickcontrols2-tabbar-wireframe.png" alt="" /></p><p><a href="qtquickcontrols2-navigation.html#tabbar">TabBar</a> is populated with <a href="qml-qtquick-controls2-tabbutton.html">TabButton</a> controls, and can be used together with any layout or container control that provides <code>currentIndex</code> -property, such as <a href="../qtquick/qml-qtquick-layouts-stacklayout.html">StackLayout</a> or <a href="qml-qtquick-controls2-swipeview.html">SwipeView</a></p>
<pre class="qml">
<span class="type"><a href="qml-qtquick-controls2-tabbar.html">TabBar</a></span> {
<span class="name">id</span>: <span class="name">bar</span>
<span class="name">width</span>: <span class="name">parent</span>.<span class="name">width</span>
<span class="type"><a href="qml-qtquick-controls2-tabbutton.html">TabButton</a></span> {
<span class="name">text</span>: <span class="name">qsTr</span>(<span class="string">"Home"</span>)
}
<span class="type"><a href="qml-qtquick-controls2-tabbutton.html">TabButton</a></span> {
<span class="name">text</span>: <span class="name">qsTr</span>(<span class="string">"Discover"</span>)
}
<span class="type"><a href="qml-qtquick-controls2-tabbutton.html">TabButton</a></span> {
<span class="name">text</span>: <span class="name">qsTr</span>(<span class="string">"Activity"</span>)
}
}
<span class="type"><a href="../qtquick/qml-qtquick-layouts-stacklayout.html">StackLayout</a></span> {
<span class="name">width</span>: <span class="name">parent</span>.<span class="name">width</span>
<span class="name">currentIndex</span>: <span class="name">bar</span>.<span class="name">currentIndex</span>
<span class="type"><a href="../qtquick/qml-qtquick-item.html">Item</a></span> {
<span class="name">id</span>: <span class="name">homeTab</span>
}
<span class="type"><a href="../qtquick/qml-qtquick-item.html">Item</a></span> {
<span class="name">id</span>: <span class="name">discoverTab</span>
}
<span class="type"><a href="../qtquick/qml-qtquick-item.html">Item</a></span> {
<span class="name">id</span>: <span class="name">activityTab</span>
}
}
</pre>
<p>As shown above, <a href="qtquickcontrols2-navigation.html#tabbar">TabBar</a> is typically populated with a static set of tab buttons that are defined inline as children of the tab bar. It is also possible to <a href="qml-qtquick-controls2-container.html#addItem-method">add</a>, <a href="qml-qtquick-controls2-container.html#insertItem-method">insert</a>, <a href="qml-qtquick-controls2-container.html#moveItem-method">move</a>, and <a href="qml-qtquick-controls2-container.html#removeItem-method">remove</a> items dynamically at run time. The items can be accessed using <a href="qml-qtquick-controls2-container.html#itemAt-method">itemAt()</a> or <a href="qml-qtquick-controls2-container.html#contentChildren-prop">contentChildren</a>.</p>
<a name="resizing-tabs"></a>
<h3 >Resizing Tabs</h3>
<p>By default, <a href="qtquickcontrols2-navigation.html#tabbar">TabBar</a> resizes its buttons to fit the width of the control. The available space is distributed equally to each button. The default resizing behavior can be overridden by setting an explicit width for the buttons.</p>
<p>The following example illustrates how to keep each tab button at their implicit size instead of being resized to fit the tabbar:</p>
<div class="border"><p class="centerAlign"><img src="images/qtquickcontrols2-tabbar-explicit.png" alt="" /></p></div><pre class="qml">
<span class="type"><a href="qml-qtquick-controls2-tabbar.html">TabBar</a></span> {
<span class="name">width</span>: <span class="name">parent</span>.<span class="name">width</span>
<span class="type"><a href="qml-qtquick-controls2-tabbutton.html">TabButton</a></span> {
<span class="name">text</span>: <span class="string">"First"</span>
<span class="name">width</span>: <span class="name">implicitWidth</span>
}
<span class="type"><a href="qml-qtquick-controls2-tabbutton.html">TabButton</a></span> {
<span class="name">text</span>: <span class="string">"Second"</span>
<span class="name">width</span>: <span class="name">implicitWidth</span>
}
<span class="type"><a href="qml-qtquick-controls2-tabbutton.html">TabButton</a></span> {
<span class="name">text</span>: <span class="string">"Third"</span>
<span class="name">width</span>: <span class="name">implicitWidth</span>
}
}
</pre>
<a name="flickable-tabs"></a>
<h3 >Flickable Tabs</h3>
<p>If the total width of the buttons exceeds the available width of the tab bar, it automatically becomes flickable.</p>
<p class="centerAlign"><img src="images/qtquickcontrols2-tabbar-flickable.png" alt="" /></p><pre class="qml">
<span class="type"><a href="qml-qtquick-controls2-tabbar.html">TabBar</a></span> {
<span class="name">id</span>: <span class="name">bar</span>
<span class="name">width</span>: <span class="name">parent</span>.<span class="name">width</span>
<span class="type"><a href="../qtquick/qml-qtquick-repeater.html">Repeater</a></span> {
<span class="name">model</span>: [<span class="string">"First"</span>, <span class="string">"Second"</span>, <span class="string">"Third"</span>, <span class="string">"Fourth"</span>, <span class="string">"Fifth"</span>]
<span class="type"><a href="qml-qtquick-controls2-tabbutton.html">TabButton</a></span> {
<span class="name">text</span>: <span class="name">modelData</span>
<span class="name">width</span>: <span class="name">Math</span>.<span class="name">max</span>(<span class="number">100</span>, <span class="name">bar</span>.<span class="name">width</span> <span class="operator">/</span> <span class="number">5</span>)
}
}
}
</pre>
<p><b>See also </b><a href="qml-qtquick-controls2-tabbutton.html">TabButton</a>, <a href="qtquickcontrols2-customize.html#customizing-tabbar">Customizing TabBar</a>, <a href="qtquickcontrols2-navigation.html">Navigation Controls</a>, and <a href="qtquickcontrols2-containers.html">Container Controls</a>.</p>
<!-- @@@TabBar -->
<h2>Property Documentation</h2>
<!-- $$$contentHeight -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="contentHeight-prop">
<td class="tblQmlPropNode"><p>
<a name="contentHeight-prop"></a><span class="name">contentHeight</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the content height. It is used for calculating the total implicit height of the tab bar.</p>
<p>Unless explicitly overridden, the content height is automatically calculated based on the maximum implicit height of the tabs.</p>
<p>This QML property was introduced in QtQuick.Controls 2.2 (Qt 5.9).</p>
<p><b>See also </b><a href="qml-qtquick-controls2-tabbar.html#contentWidth-prop">contentWidth</a>.</p>
</div></div><!-- @@@contentHeight -->
<br/>
<!-- $$$contentWidth -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="contentWidth-prop">
<td class="tblQmlPropNode"><p>
<a name="contentWidth-prop"></a><span class="name">contentWidth</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the content width. It is used for calculating the total implicit width of the tab bar.</p>
<p>Unless explicitly overridden, the content width is automatically calculated based on the total implicit width of the tabs and the <a href="qml-qtquick-controls2-control.html#spacing-prop">spacing</a> of the tab bar.</p>
<p>This QML property was introduced in QtQuick.Controls 2.2 (Qt 5.9).</p>
<p><b>See also </b><a href="qml-qtquick-controls2-tabbar.html#contentHeight-prop">contentHeight</a>.</p>
</div></div><!-- @@@contentWidth -->
<br/>
<!-- $$$position -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="position-prop">
<td class="tblQmlPropNode"><p>
<a name="position-prop"></a><span class="name">position</span> : <span class="type">enumeration</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the position of the tab bar.</p>
<p><b>Note: </b>If the tab bar is assigned as a header or footer of <a href="qml-qtquick-controls2-applicationwindow.html">ApplicationWindow</a> or <a href="qml-qtquick-controls2-page.html">Page</a>, the appropriate position is set automatically.</p><p>Possible values:</p>
<div class="table"><table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><code>TabBar.Header</code></td><td class="topAlign">The tab bar is at the top, as a window or page header.</td></tr>
<tr><td class="topAlign"><code>TabBar.Footer</code></td><td class="topAlign">The tab bar is at the bottom, as a window or page footer.</td></tr>
</table></div>
<p>The default value is style-specific.</p>
<p><b>See also </b><a href="qml-qtquick-controls2-applicationwindow.html#header-attached-prop">ApplicationWindow::header</a>, <a href="qml-qtquick-controls2-applicationwindow.html#footer-attached-prop">ApplicationWindow::footer</a>, <a href="qml-qtquick-controls2-page.html#header-prop">Page::header</a>, and <a href="qml-qtquick-controls2-page.html#footer-prop">Page::footer</a>.</p>
</div></div><!-- @@@position -->
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