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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 >HPieModelMapper QML Type</td></tr></table><table class="buildversion"><tr>
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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>
</ul>
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<h1 class="title">HPieModelMapper QML Type</h1>
<span class="subtitle"></span>
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<p>Horizontal model mapper for pie series. <a href="#details">More...</a></p>
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<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-hpiemodelmapper.html"><a href="qhpiemodelmapper.html">QHPieModelMapper</a></td></tr></table></div><ul>
<li><a href="qml-qtcharts-hpiemodelmapper-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-qtcharts-hpiemodelmapper.html#columnCount-prop">columnCount</a></b></b> : int</li>
<li class="fn"><b><b><a href="qml-qtcharts-hpiemodelmapper.html#firstColumn-prop">firstColumn</a></b></b> : int</li>
<li class="fn"><b><b><a href="qml-qtcharts-hpiemodelmapper.html#labelsRow-prop">labelsRow</a></b></b> : int</li>
<li class="fn"><b><b><a href="qml-qtcharts-hpiemodelmapper.html#model-prop">model</a></b></b> : SomeModel</li>
<li class="fn"><b><b><a href="qml-qtcharts-hpiemodelmapper.html#series-prop">series</a></b></b> : PieSeries</li>
<li class="fn"><b><b><a href="qml-qtcharts-hpiemodelmapper.html#valuesRow-prop">valuesRow</a></b></b> : int</li>
</ul>
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<a name="details"></a>
<h2 id="details">Detailed Description</h2>
<p>Model mappers enable using a data model derived from the QAbstractItemModel class as a data source for a chart. A horizontal model mapper is used to create a connection between a data model and <a href="qml-qtcharts-pieseries.html">PieSeries</a>, so that each column in the data model defines a pie slice and each row maps to the label or the value of the pie slice.</p>
<p>Both model and pie series properties can be used to manipulate the data. The model mapper keeps the pie series and the data model in sync.</p>
<p>The following QML example creates a pie series with four slices (assuming the model has at least five columns). Each slice gets a label from row 1 and a value from row 2.</p>
<pre class="cpp">
HPieModelMapper {
series: pieSeries
model: customModel
labelsRow: <span class="number">1</span>
valuesRow: <span class="number">2</span>
firstColumn: <span class="number">1</span>
columnCount: <span class="number">4</span>
}
</pre>
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<h2>Property Documentation</h2>
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<tr valign="top" class="odd" id="columnCount-prop">
<td class="tblQmlPropNode"><p>
<a name="columnCount-prop"></a><span class="name">columnCount</span> : <span class="type">int</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The number of columns of the model that are mapped as the data for the pie series. The default value is -1 (number limited by the number of columns in the model).</p>
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<div class="qmlitem"><div class="qmlproto">
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<tr valign="top" class="odd" id="firstColumn-prop">
<td class="tblQmlPropNode"><p>
<a name="firstColumn-prop"></a><span class="name">firstColumn</span> : <span class="type">int</span></p></td></tr>
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</div><div class="qmldoc"><p>The column of the model that contains the first slice value. The default value is 0.</p>
</div></div><!-- @@@firstColumn -->
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<!-- $$$labelsRow -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="labelsRow-prop">
<td class="tblQmlPropNode"><p>
<a name="labelsRow-prop"></a><span class="name">labelsRow</span> : <span class="type">int</span></p></td></tr>
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</div><div class="qmldoc"><p>The row of the model that is kept in sync with the labels of the pie's slices. The default value is -1 (invalid mapping).</p>
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<tr valign="top" class="odd" id="model-prop">
<td class="tblQmlPropNode"><p>
<a name="model-prop"></a><span class="name">model</span> : <span class="type">SomeModel</span></p></td></tr>
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</div><div class="qmldoc"><p>The QAbstractItemModel based model that is used by the mapper. You need to implement the model and expose it to QML.</p>
<p><b>Note: </b>The model has to support adding and removing rows or columns and modifying the data in the cells.</p></div></div><!-- @@@model -->
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<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="series-prop">
<td class="tblQmlPropNode"><p>
<a name="series-prop"></a><span class="name">series</span> : <span class="type"><a href="qml-qtcharts-pieseries.html">PieSeries</a></span></p></td></tr>
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</div><div class="qmldoc"><p>The <a href="qml-qtcharts-pieseries.html">PieSeries</a> object that is used by the mapper. If you define the mapper element as a child for a <a href="qml-qtcharts-pieseries.html">PieSeries</a>, leave this property undefined. All the data in the series is discarded when it is set to the mapper. When a new series is specified, the old series is disconnected (but it preserves its data).</p>
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<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="valuesRow-prop">
<td class="tblQmlPropNode"><p>
<a name="valuesRow-prop"></a><span class="name">valuesRow</span> : <span class="type">int</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The row of the model that is kept in sync with the values of the pie's slices. The default value is -1 (invalid mapping).</p>
</div></div><!-- @@@valuesRow -->
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