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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 >VBoxPlotModelMapper 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">VBoxPlotModelMapper QML Type</h1>
<span class="subtitle"></span>
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<p>Vertical model mapper for box plot 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-vboxplotmodelmapper.html"><a href="qvboxplotmodelmapper.html">QVBoxPlotModelMapper</a></td></tr></table></div><ul>
<li><a href="qml-qtcharts-vboxplotmodelmapper-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-vboxplotmodelmapper.html#firstBoxSetColumn-prop">firstBoxSetColumn</a></b></b> : int</li>
<li class="fn"><b><b><a href="qml-qtcharts-vboxplotmodelmapper.html#firstRow-prop">firstRow</a></b></b> : int</li>
<li class="fn"><b><b><a href="qml-qtcharts-vboxplotmodelmapper.html#lastBoxSetColumn-prop">lastBoxSetColumn</a></b></b> : int</li>
<li class="fn"><b><b><a href="qml-qtcharts-vboxplotmodelmapper.html#model-prop">model</a></b></b> : SomeModel</li>
<li class="fn"><b><b><a href="qml-qtcharts-vboxplotmodelmapper.html#rowCount-prop">rowCount</a></b></b> : int</li>
<li class="fn"><b><b><a href="qml-qtcharts-vboxplotmodelmapper.html#series-prop">series</a></b></b> : AbstractBarSeries</li>
</ul>
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<a name="details"></a>
<h2 id="details">Detailed Description</h2>
<p>The <a href="qml-qtcharts-vboxplotmodelmapper.html">VBoxPlotModelMapper</a> type enables using a data model derived from the QAbstractItemModel class as a data source for a chart. A vertical model mapper is used to create a connection between a data model and a <a href="qml-qtcharts-boxplotseries.html">BoxPlotSeries</a> type, so that each column in the data model defines a box-and-whiskers item and each row maps to the range and three median values of the box-and-whiskers item.</p>
<p>Both model and series properties can be used to manipulate the data. The model mapper keeps the series and the data model in sync.</p>
<p>The model mapper ensures that all the bar box-and-whiskers items in the box plot series have equal sizes. Therefore, adding or removing a value from a box-and-whiskers item causes the same change to be made in all the box-and-whiskers items in the box plot series.</p>
<p>The following QML code snippet creates a box plot series with three box-and-whiskers items (assuming the model has at least four columns). Each box-and-whiskers item contains data starting from row 1. The name of an item is defined by the column header.</p>
<pre class="cpp">
BoxPlotSeries {
VBoxPlotModelMapper {
model: myCustomModel <span class="comment">// QAbstractItemModel derived implementation</span>
firstBoxSetColumn: <span class="number">1</span>
lastBoxSetColumn: <span class="number">3</span>
firstRow: <span class="number">1</span>
}
}
</pre>
<p><b>See also </b><a href="qml-qtcharts-hboxplotmodelmapper.html">HBoxPlotModelMapper</a>.</p>
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<h2>Property Documentation</h2>
<!-- $$$firstBoxSetColumn -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="firstBoxSetColumn-prop">
<td class="tblQmlPropNode"><p>
<a name="firstBoxSetColumn-prop"></a><span class="name">firstBoxSetColumn</span> : <span class="type">int</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The column of the model that is used as the data source for the first box-and-whiskers item. The default value is -1 (invalid mapping).</p>
</div></div><!-- @@@firstBoxSetColumn -->
<br/>
<!-- $$$firstRow -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="firstRow-prop">
<td class="tblQmlPropNode"><p>
<a name="firstRow-prop"></a><span class="name">firstRow</span> : <span class="type">int</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The row of the model that contains the first values of the box-and-whiskers items in the box plot series.</p>
<p>The default value is 0.</p>
</div></div><!-- @@@firstRow -->
<br/>
<!-- $$$lastBoxSetColumn -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="lastBoxSetColumn-prop">
<td class="tblQmlPropNode"><p>
<a name="lastBoxSetColumn-prop"></a><span class="name">lastBoxSetColumn</span> : <span class="type">int</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The column of the model that is used as the data source for the last box-and-whiskers item. The default value is -1 (invalid mapping).</p>
</div></div><!-- @@@lastBoxSetColumn -->
<br/>
<!-- $$$model -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<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>
</table></div>
</div><div class="qmldoc"><p>The data 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 -->
<br/>
<!-- $$$rowCount -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="rowCount-prop">
<td class="tblQmlPropNode"><p>
<a name="rowCount-prop"></a><span class="name">rowCount</span> : <span class="type">int</span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The number of rows of the model that are mapped as the data for the box plot series.</p>
<p>The default value is -1 (number limited to the number of columns in the model).</p>
</div></div><!-- @@@rowCount -->
<br/>
<!-- $$$series -->
<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-abstractbarseries.html">AbstractBarSeries</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>The box plot series that is used by the mapper.</p>
<p>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>
</div></div><!-- @@@series -->
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