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<title>CategoryAxis QML Type | Qt Charts 5.9</title>
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<td >Qt 5.9</td><td ><a href="qtcharts-index.html">Qt Charts</a></td><td ><a href="qtcharts-qmlmodule.html">QML Types</a></td><td >CategoryAxis QML Type</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 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="#methods">Methods</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">CategoryAxis QML Type</h1>
<span class="subtitle"></span>
<!-- $$$CategoryAxis-brief -->
<p><a href="qml-qtcharts-categoryaxis.html">CategoryAxis</a> places named ranges on the axis. <a href="#details">More...</a></p>
<!-- @@@CategoryAxis -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Import Statement:</td><td class="memItemRight bottomAlign"> import QtCharts 2.2</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Instantiates:</td><td class="memItemRight bottomAlign"> <a href="qml-qtcharts-categoryaxis.html"><a href="qcategoryaxis.html">QCategoryAxis</a></td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <p><a href="qml-qtcharts-abstractaxis.html">AbstractAxis</a></p>
</td></tr></table></div><ul>
<li><a href="qml-qtcharts-categoryaxis-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="properties"></a>
<h2 id="properties">Properties</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtcharts-categoryaxis.html#categoriesLabels-prop">categoriesLabels</a></b></b> : StringList</li>
<li class="fn"><b><b><a href="qml-qtcharts-categoryaxis.html#count-prop">count</a></b></b> : int</li>
<li class="fn"><b><b><a href="qml-qtcharts-categoryaxis.html#labelsPosition-prop">labelsPosition</a></b></b> : enumeration</li>
<li class="fn"><b><b><a href="qml-qtcharts-categoryaxis.html#startValue-prop">startValue</a></b></b> : int</li>
</ul>
<a name="methods"></a>
<h2 id="methods">Methods</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtcharts-categoryaxis.html#append-method">append</a></b></b>(string <i>label</i>, real <i>endValue</i>)</li>
<li class="fn"><b><b><a href="qml-qtcharts-categoryaxis.html#remove-method">remove</a></b></b>(string <i>label</i>)</li>
<li class="fn"><b><b><a href="qml-qtcharts-categoryaxis.html#replace-method">replace</a></b></b>(string <i>oldLabel</i>, string <i>newLabel</i>)</li>
</ul>
<!-- $$$CategoryAxis-description -->
<a name="details"></a>
<h2 id="details">Detailed Description</h2>
<p>This type can be used to explain the underlying data by adding labeled categories. The widths of the category ranges can be specified freely.</p>
<p>For example:</p>
<p class="centerAlign"><img src="images/examples_qmlaxes3.png" alt="" /></p><pre class="qml">
<span class="type"><a href="qml-qtcharts-chartview.html">ChartView</a></span> {
<span class="name">title</span>: <span class="string">"Numerical Data for Dummies"</span>
<span class="name">anchors</span>.fill: <span class="name">parent</span>
<span class="name">legend</span>.visible: <span class="number">false</span>
<span class="name">antialiasing</span>: <span class="number">true</span>
<span class="type"><a href="qml-qtcharts-lineseries.html">LineSeries</a></span> {
<span class="name">axisY</span>: <span class="name">CategoryAxis</span> {
<span class="name">min</span>: <span class="number">0</span>
<span class="name">max</span>: <span class="number">30</span>
<span class="type"><a href="qml-qtcharts-categoryrange.html">CategoryRange</a></span> {
<span class="name">label</span>: <span class="string">"critical"</span>
<span class="name">endValue</span>: <span class="number">2</span>
}
<span class="type"><a href="qml-qtcharts-categoryrange.html">CategoryRange</a></span> {
<span class="name">label</span>: <span class="string">"low"</span>
<span class="name">endValue</span>: <span class="number">4</span>
}
<span class="type"><a href="qml-qtcharts-categoryrange.html">CategoryRange</a></span> {
<span class="name">label</span>: <span class="string">"normal"</span>
<span class="name">endValue</span>: <span class="number">7</span>
}
<span class="type"><a href="qml-qtcharts-categoryrange.html">CategoryRange</a></span> {
<span class="name">label</span>: <span class="string">"high"</span>
<span class="name">endValue</span>: <span class="number">15</span>
}
<span class="type"><a href="qml-qtcharts-categoryrange.html">CategoryRange</a></span> {
<span class="name">label</span>: <span class="string">"extremely high"</span>
<span class="name">endValue</span>: <span class="number">30</span>
}
}
<span class="type"><a href="qml-qtcharts-xypoint.html">XYPoint</a></span> { <span class="name">x</span>: <span class="number">0</span>; <span class="name">y</span>: <span class="number">4.3</span> }
<span class="type"><a href="qml-qtcharts-xypoint.html">XYPoint</a></span> { <span class="name">x</span>: <span class="number">1</span>; <span class="name">y</span>: <span class="number">4.1</span> }
<span class="type"><a href="qml-qtcharts-xypoint.html">XYPoint</a></span> { <span class="name">x</span>: <span class="number">2</span>; <span class="name">y</span>: <span class="number">4.7</span> }
<span class="type"><a href="qml-qtcharts-xypoint.html">XYPoint</a></span> { <span class="name">x</span>: <span class="number">3</span>; <span class="name">y</span>: <span class="number">3.9</span> }
<span class="type"><a href="qml-qtcharts-xypoint.html">XYPoint</a></span> { <span class="name">x</span>: <span class="number">4</span>; <span class="name">y</span>: <span class="number">5.2</span> }
}
}
</pre>
<!-- @@@CategoryAxis -->
<h2>Property Documentation</h2>
<!-- $$$categoriesLabels -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="categoriesLabels-prop">
<td class="tblQmlPropNode"><p>
<a name="categoriesLabels-prop"></a><span class="name">categoriesLabels</span> : <span class="type">StringList</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The category labels as a list of strings.</p>
</div></div><!-- @@@categoriesLabels -->
<br/>
<!-- $$$count -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="count-prop">
<td class="tblQmlPropNode"><p>
<a name="count-prop"></a><span class="name">count</span> : <span class="type">int</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The number of categories.</p>
</div></div><!-- @@@count -->
<br/>
<!-- $$$labelsPosition -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="labelsPosition-prop">
<td class="tblQmlPropNode"><p>
<a name="labelsPosition-prop"></a><span class="name">labelsPosition</span> : <span class="type">enumeration</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The position of the category labels. The labels in the beginning and in the end of the axes may overlap other axes' labels when positioned on value.</p>
<div class="table"><table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><code>CategoryAxis.AxisLabelsPositionCenter</code></td><td class="topAlign">Labels are centered to category.</td></tr>
<tr><td class="topAlign"><code>CategoryAxis.AxisLabelsPositionOnValue</code></td><td class="topAlign">Labels are positioned to the high end limit of the category.</td></tr>
</table></div>
</div></div><!-- @@@labelsPosition -->
<br/>
<!-- $$$startValue -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="startValue-prop">
<td class="tblQmlPropNode"><p>
<a name="startValue-prop"></a><span class="name">startValue</span> : <span class="type">int</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The low end of the first category on the axis.</p>
</div></div><!-- @@@startValue -->
<br/>
<h2>Method Documentation</h2>
<!-- $$$append -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="append-method">
<td class="tblQmlFuncNode"><p>
<a name="append-method"></a><span class="name">append</span>(<span class="type">string</span> <i>label</i>, <span class="type">real</span> <i>endValue</i>)</p></td></tr>
</table></div>
</div><div class="qmldoc"><p>Appends a new category to the axis with the label <i>label</i>. A category label has to be unique. <i>endValue</i> specifies the high end limit of the category. It has to be greater than the high end limit of the previous category. Otherwise the method returns without adding a new category.</p>
</div></div><!-- @@@append -->
<br/>
<!-- $$$remove -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="remove-method">
<td class="tblQmlFuncNode"><p>
<a name="remove-method"></a><span class="name">remove</span>(<span class="type">string</span> <i>label</i>)</p></td></tr>
</table></div>
</div><div class="qmldoc"><p>Removes a category specified by the label <i>label</i> from the axis.</p>
</div></div><!-- @@@remove -->
<br/>
<!-- $$$replace -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="replace-method">
<td class="tblQmlFuncNode"><p>
<a name="replace-method"></a><span class="name">replace</span>(<span class="type">string</span> <i>oldLabel</i>, <span class="type">string</span> <i>newLabel</i>)</p></td></tr>
</table></div>
</div><div class="qmldoc"><p>Replaces an existing category label specified by <i>oldLabel</i> with <i>newLabel</i>. If the old label does not exist, the method returns without making any changes.</p>
</div></div><!-- @@@replace -->
<br/>
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