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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" />
<!-- CircularGauge.qml -->
  <title>CircularGauge QML Type | Qt Quick Extras 5.9</title>
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</head>
<body>
<div class="header" id="qtdocheader">
  <div class="main">
    <div class="main-rounded">
      <div class="navigationbar">
        <table><tr>
<td >Qt 5.9</td><td ><a href="qtquickextras-index.html">Qt Quick Extras</a></td><td ><a href="qtquick-extras-qmlmodule.html">QML Types</a></td><td >CircularGauge 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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<div class="content">
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<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="#details">Detailed Description</a></li>
</ul>
</div>
<div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">CircularGauge QML Type</h1>
<span class="subtitle"></span>
<!-- $$$CircularGauge-brief -->
<p>A gauge that displays a value within a range along an arc. <a href="#details">More...</a></p>
<!-- @@@CircularGauge -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Import Statement:</td><td class="memItemRight bottomAlign"> import QtQuick.Extras 1.4</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign">  Qt 5.5</td></tr></table></div><ul>
<li><a href="qml-qtquick-extras-circulargauge-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="properties"></a>
<h2 id="properties">Properties</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtquick-extras-circulargauge.html#maximumValue-prop">maximumValue</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtquick-extras-circulargauge.html#minimumValue-prop">minimumValue</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtquick-extras-circulargauge.html#stepSize-prop">stepSize</a></b></b> : real</li>
<li class="fn"><b><b><a href="qml-qtquick-extras-circulargauge.html#tickmarksVisible-prop">tickmarksVisible</a></b></b> : bool</li>
<li class="fn"><b><b><a href="qml-qtquick-extras-circulargauge.html#value-prop">value</a></b></b> : alias</li>
</ul>
<!-- $$$CircularGauge-description -->
<a name="details"></a>
<h2 id="details">Detailed Description</h2>
<p class="centerAlign"><img src="images/circulargauge.png" alt="CircularGauge" /></p><p>The <a href="qml-qtquick-extras-circulargauge.html">CircularGauge</a> is similar to traditional mechanical gauges that use a needle to display a value from some input, such as the speed of a vehicle or air pressure, for example.</p>
<p>The minimum and maximum values displayable by the gauge can be set with the <a href="qml-qtquick-extras-circulargauge.html#minimumValue-prop">minimumValue</a> and <a href="qml-qtquick-extras-circulargauge.html#maximumValue-prop">maximumValue</a> properties. The angle at which these values are displayed can be set with the minimumValueAngle and maximumValueAngle properties of CircularGaugeStyle.</p>
<p>Example:</p>
<pre class="cpp">

  CircularGauge {
      value: accelerating <span class="operator">?</span> maximumValue : <span class="number">0</span>
      anchors<span class="operator">.</span>centerIn: parent

      property bool accelerating: <span class="keyword">false</span>

      Keys<span class="operator">.</span>onSpacePressed: accelerating <span class="operator">=</span> <span class="keyword">true</span>
      Keys<span class="operator">.</span>onReleased: {
          <span class="keyword">if</span> (event<span class="operator">.</span>key <span class="operator">=</span><span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="../qtqml/qml-qtqml-qt.html">Qt</a></span><span class="operator">.</span>Key_Space) {
              accelerating <span class="operator">=</span> <span class="keyword">false</span>;
              event<span class="operator">.</span>accepted <span class="operator">=</span> <span class="keyword">true</span>;
          }
      }

      Component<span class="operator">.</span>onCompleted: forceActiveFocus()

      Behavior on value {
          NumberAnimation {
              duration: <span class="number">1000</span>
          }
      }
  }

</pre>
<p>You can create a custom appearance for a <a href="qml-qtquick-extras-circulargauge.html">CircularGauge</a> by assigning a CircularGaugeStyle.</p>
<!-- @@@CircularGauge -->
<h2>Property Documentation</h2>
<!-- $$$maximumValue -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="maximumValue-prop">
<td class="tblQmlPropNode"><p>
<a name="maximumValue-prop"></a><span class="name">maximumValue</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the largest value displayed by the gauge.</p>
</div></div><!-- @@@maximumValue -->
<br/>
<!-- $$$minimumValue -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="minimumValue-prop">
<td class="tblQmlPropNode"><p>
<a name="minimumValue-prop"></a><span class="name">minimumValue</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the smallest value displayed by the gauge.</p>
</div></div><!-- @@@minimumValue -->
<br/>
<!-- $$$stepSize -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="stepSize-prop">
<td class="tblQmlPropNode"><p>
<a name="stepSize-prop"></a><span class="name">stepSize</span> : <span class="type">real</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the size of the value increments that the needle displays.</p>
<p>For example, when stepSize is <code>10</code> and value is <code>0</code>, adding <code>5</code> to <a href="qml-qtquick-extras-circulargauge.html#value-prop">value</a> will have no visible effect on the needle, although <a href="qml-qtquick-extras-circulargauge.html#value-prop">value</a> will still be incremented. Adding an extra <code>5</code> to <a href="qml-qtquick-extras-circulargauge.html#value-prop">value</a> will then cause the needle to point to <code>10</code>.</p>
</div></div><!-- @@@stepSize -->
<br/>
<!-- $$$tickmarksVisible -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="tickmarksVisible-prop">
<td class="tblQmlPropNode"><p>
<a name="tickmarksVisible-prop"></a><span class="name">tickmarksVisible</span> : <span class="type">bool</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property determines whether or not the gauge displays tickmarks, minor tickmarks, and labels.</p>
<p>For more fine-grained control over what is displayed, the following style components of CircularGaugeStyle can be used:</p>
<ul>
<li>tickmark</li>
<li>minorTickmark</li>
<li>tickmarkLabel</li>
</ul>
</div></div><!-- @@@tickmarksVisible -->
<br/>
<!-- $$$value -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="value-prop">
<td class="tblQmlPropNode"><p>
<a name="value-prop"></a><span class="name">value</span> : <span class="type">alias</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the current value displayed by the gauge, which will always be between <a href="qml-qtquick-extras-circulargauge.html#minimumValue-prop">minimumValue</a> and <a href="qml-qtquick-extras-circulargauge.html#maximumValue-prop">maximumValue</a>, inclusive.</p>
</div></div><!-- @@@value -->
<br/>
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