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<title>CheckBox QML Type | Qt Quick Controls 5.5</title>
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<li>Qt 5.5</li>
<li><a href="qtquickcontrols-index.html">Qt Quick Controls</a></li>
<li><a href="qtquick-controls-qmlmodule.html">QML Types</a></li>
<li>CheckBox QML Type</li>
<li id="buildversion">Qt 5.5.1 Reference Documentation</li>
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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="#signals">Signals</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
</ul>
</div>
<div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">CheckBox QML Type</h1>
<span class="subtitle"></span>
<!-- $$$CheckBox-brief -->
<p>A checkbox with a text label. <a href="#details">More...</a></p>
<!-- @@@CheckBox -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Import Statement:</td><td class="memItemRight bottomAlign"> import QtQuick.Controls 1.4</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> Qt 5.1</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <p><a href="../qtquick/qml-qtquick-focusscope.html">FocusScope</a></p>
</td></tr></table></div><ul>
<li><a href="qml-qtquick-controls-checkbox-members.html">List of all members, including inherited members</a></li>
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<a name="properties"></a>
<h2 id="properties">Properties</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtquick-controls-checkbox.html#activeFocusOnPress-prop">activeFocusOnPress</a></b></b> : bool</li>
<li class="fn"><b><b><a href="qml-qtquick-controls-checkbox.html#checked-prop">checked</a></b></b> : bool</li>
<li class="fn"><b><b><a href="qml-qtquick-controls-checkbox.html#checkedState-prop">checkedState</a></b></b> : int</li>
<li class="fn"><b><b><a href="qml-qtquick-controls-checkbox.html#exclusiveGroup-prop">exclusiveGroup</a></b></b> : ExclusiveGroup</li>
<li class="fn"><b><b><a href="qml-qtquick-controls-checkbox.html#hovered-prop">hovered</a></b></b> : bool</li>
<li class="fn"><b><b><a href="qml-qtquick-controls-checkbox.html#partiallyCheckedEnabled-prop">partiallyCheckedEnabled</a></b></b> : bool</li>
<li class="fn"><b><b><a href="qml-qtquick-controls-checkbox.html#pressed-prop">pressed</a></b></b> : bool</li>
<li class="fn"><b><b><a href="qml-qtquick-controls-checkbox.html#style-prop">style</a></b></b> : Component</li>
<li class="fn"><b><b><a href="qml-qtquick-controls-checkbox.html#text-prop">text</a></b></b> : string</li>
</ul>
<a name="signals"></a>
<h2 id="signals">Signals</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtquick-controls-checkbox.html#clicked-signal">clicked</a></b></b>()</li>
</ul>
<!-- $$$CheckBox-description -->
<a name="details"></a>
<h2 id="details">Detailed Description</h2>
</p>
<p class="centerAlign"><img src="images/checkbox.png" alt="" /></p><p>A <a href="qml-qtquick-controls-checkbox.html">CheckBox</a> is an option button that can be toggled on (checked) or off (unchecked). Checkboxes are typically used to represent features in an application that can be enabled or disabled without affecting others.</p>
<p>The state of the checkbox can be set with the <a href="qml-qtquick-controls-checkbox.html#checked-prop">checked</a> property.</p>
<p>In addition to the checked and unchecked states, there is a third state: partially checked. This state indicates that the regular checked/unchecked state can not be determined; generally because of other states that affect the checkbox. This state is useful when several child nodes are selected in a treeview, for example.</p>
<p>The partially checked state can be made available to the user by setting <a href="qml-qtquick-controls-checkbox.html#partiallyCheckedEnabled-prop">partiallyCheckedEnabled</a> to <code>true</code>, or set directly by setting <a href="qml-qtquick-controls-checkbox.html#checkedState-prop">checkedState</a> to <code>Qt.PartiallyChecked</code>. <a href="qml-qtquick-controls-checkbox.html#checkedState-prop">checkedState</a> behaves identically to <a href="qml-qtquick-controls-checkbox.html#checked-prop">checked</a> when <a href="qml-qtquick-controls-checkbox.html#partiallyCheckedEnabled-prop">partiallyCheckedEnabled</a> is <code>false</code>; setting one will appropriately set the other.</p>
<p>The label is shown next to the checkbox, and you can set the label text using its <a href="qml-qtquick-controls-checkbox.html#text-prop">text</a> property.</p>
<pre class="qml"><span class="type"><a href="../qtquick/qml-qtquick-column.html">Column</a></span> {
<span class="type"><a href="qml-qtquick-controls-checkbox.html">CheckBox</a></span> {
<span class="name">text</span>: <span class="name">qsTr</span>(<span class="string">"Breakfast"</span>)
<span class="name">checked</span>: <span class="number">true</span>
}
<span class="type"><a href="qml-qtquick-controls-checkbox.html">CheckBox</a></span> {
<span class="name">text</span>: <span class="name">qsTr</span>(<span class="string">"Lunch"</span>)
}
<span class="type"><a href="qml-qtquick-controls-checkbox.html">CheckBox</a></span> {
<span class="name">text</span>: <span class="name">qsTr</span>(<span class="string">"Dinner"</span>)
<span class="name">checked</span>: <span class="number">true</span>
}
}</pre>
<p>Whenever a <a href="qml-qtquick-controls-checkbox.html">CheckBox</a> is clicked, it emits the <a href="qml-qtquick-controls-checkbox.html#clicked-signal">clicked()</a> signal.</p>
<p>You can create a custom appearance for a <a href="qml-qtquick-controls-checkbox.html">CheckBox</a> by assigning a <a href="qml-qtquick-controls-styles-checkboxstyle.html">CheckBoxStyle</a>.</p>
<!-- @@@CheckBox -->
<h2>Property Documentation</h2>
<!-- $$$activeFocusOnPress -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="activeFocusOnPress-prop"><td class="tblQmlPropNode"><p><a name="activeFocusOnPress-prop"></a><span class="name">activeFocusOnPress</span> : <span class="type">bool</span></p></td></tr></table></div></div><div class="qmldoc"><p>This property is <code>true</code> if the control takes the focus when it is pressed; <a href="../qtquick/qquickitem.html#forceActiveFocus">forceActiveFocus()</a> will be called on the control.</p>
</div></div><!-- @@@activeFocusOnPress -->
<br/>
<!-- $$$checked -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="checked-prop"><td class="tblQmlPropNode"><p><a name="checked-prop"></a><span class="name">checked</span> : <span class="type">bool</span></p></td></tr></table></div></div><div class="qmldoc"><p>This property is <code>true</code> if the control is checked.</p>
</div></div><!-- @@@checked -->
<br/>
<!-- $$$checkedState -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="checkedState-prop"><td class="tblQmlPropNode"><p><a name="checkedState-prop"></a><span class="name">checkedState</span> : <span class="type">int</span></p></td></tr></table></div></div><div class="qmldoc"><p>This property indicates the current checked state of the checkbox.</p>
<p>Possible values: <code>Qt.UnChecked</code> - The checkbox is not checked (default). <code>Qt.Checked</code> - The checkbox is checked. <code>Qt.PartiallyChecked</code> - The checkbox is in a partially checked (or "mixed") state.</p>
<p>The <a href="qml-qtquick-controls-checkbox.html#checked-prop">checked</a> property also determines whether this property is <code>Qt.Checked</code> or <code>Qt.UnChecked</code>, and vice versa.</p>
</div></div><!-- @@@checkedState -->
<br/>
<!-- $$$exclusiveGroup -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="exclusiveGroup-prop"><td class="tblQmlPropNode"><p><a name="exclusiveGroup-prop"></a><span class="name">exclusiveGroup</span> : <span class="type"><a href="qml-qtquick-controls-exclusivegroup.html">ExclusiveGroup</a></span></p></td></tr></table></div></div><div class="qmldoc"><p>This property stores the <a href="qml-qtquick-controls-exclusivegroup.html">ExclusiveGroup</a> that the control belongs to.</p>
</div></div><!-- @@@exclusiveGroup -->
<br/>
<!-- $$$hovered -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="hovered-prop"><td class="tblQmlPropNode"><p><a name="hovered-prop"></a><span class="qmlreadonly">read-only</span><span class="name">hovered</span> : <span class="type">bool</span></p></td></tr></table></div></div><div class="qmldoc"><p>This property indicates whether the control is being hovered.</p>
</div></div><!-- @@@hovered -->
<br/>
<!-- $$$partiallyCheckedEnabled -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="partiallyCheckedEnabled-prop"><td class="tblQmlPropNode"><p><a name="partiallyCheckedEnabled-prop"></a><span class="name">partiallyCheckedEnabled</span> : <span class="type">bool</span></p></td></tr></table></div></div><div class="qmldoc"><p>This property determines whether the <code>Qt.PartiallyChecked</code> state is available.</p>
<p>A checkbox may be in a partially checked state when the regular checked state can not be determined.</p>
<p>Setting <a href="qml-qtquick-controls-checkbox.html#checkedState-prop">checkedState</a> to <code>Qt.PartiallyChecked</code> will implicitly set this property to <code>true</code>.</p>
<p>If this property is <code>true</code>, <a href="qml-qtquick-controls-checkbox.html#checked-prop">checked</a> will be <code>false</code>.</p>
<p>By default, this property is <code>false</code>.</p>
</div></div><!-- @@@partiallyCheckedEnabled -->
<br/>
<!-- $$$pressed -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="pressed-prop"><td class="tblQmlPropNode"><p><a name="pressed-prop"></a><span class="name">pressed</span> : <span class="type">bool</span></p></td></tr></table></div></div><div class="qmldoc"><p>This property is <code>true</code> if the control is being pressed. Set this property to manually invoke a mouse click.</p>
</div></div><!-- @@@pressed -->
<br/>
<!-- $$$style -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="style-prop"><td class="tblQmlPropNode"><p><a name="style-prop"></a><span class="name">style</span> : <span class="type"><a href="../qtqml/qml-qtqml-component.html">Component</a></span></p></td></tr></table></div></div><div class="qmldoc"><p>The style Component for this control.</p>
<p><b>See also </b><a href="qtquick-controls-styles-qmlmodule.html">Qt Quick Controls Styles QML Types</a>.</p>
</div></div><!-- @@@style -->
<br/>
<!-- $$$text -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="text-prop"><td class="tblQmlPropNode"><p><a name="text-prop"></a><span class="name">text</span> : <span class="type">string</span></p></td></tr></table></div></div><div class="qmldoc"><p>This property holds the text that the label should display.</p>
</div></div><!-- @@@text -->
<br/>
<h2>Signal Documentation</h2>
<!-- $$$clicked -->
<div class="qmlitem"><div class="qmlproto"><div class="table"><table class="qmlname"><tr valign="top" class="odd" id="clicked-signal"><td class="tblQmlFuncNode"><p><a name="clicked-signal"></a><span class="name">clicked</span>()</p></td></tr></table></div></div><div class="qmldoc"><p>Emitted whenever the control is clicked.</p>
</div></div><!-- @@@clicked -->
<br/>
</div>
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