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<title>QHBarModelMapper Class | 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="qt-charts-module.html">C++ Classes</a></td><td >QHBarModelMapper</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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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#signals">Signals</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QHBarModelMapper Class</h1>
<!-- $$$QHBarModelMapper-brief -->
<p>The <a href="qhbarmodelmapper.html">QHBarModelMapper</a> class is a horizontal model mapper for bar series. <a href="#details">More...</a></p>
<!-- @@@QHBarModelMapper -->
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QHBarModelMapper></span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Instantiated By:</td><td class="memItemRight bottomAlign"> <a href="qml-qtcharts-hbarmodelmapper.html">HBarModelMapper</a></td></tr></table></div><ul>
<li><a href="qhbarmodelmapper-members.html">List of all members, including inherited members</a></li>
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<a name="properties"></a>
<h2 id="properties">Properties</h2>
<div class="table"><table class="propsummary">
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<li class="fn"><b><a href="qhbarmodelmapper.html#columnCount-prop">columnCount</a></b> : int</li>
<li class="fn"><b><a href="qhbarmodelmapper.html#firstBarSetRow-prop">firstBarSetRow</a></b> : int</li>
<li class="fn"><b><a href="qhbarmodelmapper.html#firstColumn-prop">firstColumn</a></b> : int</li>
</ul></td><td class="topAlign"><ul>
<li class="fn"><b><a href="qhbarmodelmapper.html#lastBarSetRow-prop">lastBarSetRow</a></b> : int</li>
<li class="fn"><b><a href="qhbarmodelmapper.html#model-prop">model</a></b> : QAbstractItemModel *</li>
<li class="fn"><b><a href="qhbarmodelmapper.html#series-prop">series</a></b> : QAbstractBarSeries *</li>
</ul>
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<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#QHBarModelMapper">QHBarModelMapper</a></b>(QObject *<i>parent</i> = Q_NULLPTR)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#columnCount-prop">columnCount</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#firstBarSetRow-prop">firstBarSetRow</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#firstColumn-prop">firstColumn</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#lastBarSetRow-prop">lastBarSetRow</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QAbstractItemModel *</td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#model-prop">model</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QAbstractBarSeries *</td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#series-prop">series</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#columnCount-prop">setColumnCount</a></b>(int <i>columnCount</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#firstBarSetRow-prop">setFirstBarSetRow</a></b>(int <i>firstBarSetRow</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#firstColumn-prop">setFirstColumn</a></b>(int <i>firstColumn</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#lastBarSetRow-prop">setLastBarSetRow</a></b>(int <i>lastBarSetRow</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#model-prop">setModel</a></b>(QAbstractItemModel *<i>model</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#series-prop">setSeries</a></b>(QAbstractBarSeries *<i>series</i>)</td></tr>
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<a name="signals"></a>
<h2 id="signals">Signals</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#columnCountChanged">columnCountChanged</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#firstBarSetRowChanged">firstBarSetRowChanged</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#firstColumnChanged">firstColumnChanged</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#lastBarSetRowChanged">lastBarSetRowChanged</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#modelReplaced">modelReplaced</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qhbarmodelmapper.html#seriesReplaced">seriesReplaced</a></b>()</td></tr>
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<a name="details"></a>
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<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qhbarmodelmapper.html">QHBarModelMapper</a> class is a horizontal model mapper for bar series.</p>
<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="qabstractbarseries.html">QAbstractBarSeries</a>, so that each row in the data model defines a bar set and each column maps to a category in a bar series.</p>
<p>Both model and bar series properties can be used to manipulate the data. The model mapper keeps the bar series and the data model in sync.</p>
<p>The model mapper ensures that all the bar sets in the bar series have equal sizes. Therefore, adding or removing a value from a bar set causes the same change to be made in all the bar sets in the bar series.</p>
</div>
<p><b>See also </b><a href="qvbarmodelmapper.html">QVBarModelMapper</a>.</p>
<!-- @@@QHBarModelMapper -->
<div class="prop">
<h2>Property Documentation</h2>
<!-- $$$columnCount-prop$$$columnCount$$$setColumnCountint$$$columnCountChanged -->
<h3 class="fn" id="columnCount-prop"><a name="columnCount-prop"></a><span class="name">columnCount</span> : <span class="type">int</span></h3>
<p>This property holds the number of columns of the model that are mapped as the data for the bar series.</p>
<p>The minimum and default value is -1 (number limited to the number of columns in the model).</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> int </td><td class="memItemRight bottomAlign"><span class="name"><b>columnCount</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setColumnCount</b></span>(int <i>columnCount</i>)</td></tr>
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<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b><a href="qhbarmodelmapper.html#columnCountChanged">columnCountChanged</a></b></span>()</td></tr>
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<!-- @@@columnCount -->
<!-- $$$firstBarSetRow-prop$$$firstBarSetRow$$$setFirstBarSetRowint$$$firstBarSetRowChanged -->
<h3 class="fn" id="firstBarSetRow-prop"><a name="firstBarSetRow-prop"></a><span class="name">firstBarSetRow</span> : <span class="type">int</span></h3>
<p>This property holds the row of the model that is used as the data source for the first bar set.</p>
<p>The default value is -1 (invalid mapping).</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> int </td><td class="memItemRight bottomAlign"><span class="name"><b>firstBarSetRow</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setFirstBarSetRow</b></span>(int <i>firstBarSetRow</i>)</td></tr>
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<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b><a href="qhbarmodelmapper.html#firstBarSetRowChanged">firstBarSetRowChanged</a></b></span>()</td></tr>
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<!-- @@@firstBarSetRow -->
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<h3 class="fn" id="firstColumn-prop"><a name="firstColumn-prop"></a><span class="name">firstColumn</span> : <span class="type">int</span></h3>
<p>This property holds the column of the model that contains the first values of the bar sets in the bar series.</p>
<p>The minimum and default value is 0.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> int </td><td class="memItemRight bottomAlign"><span class="name"><b>firstColumn</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setFirstColumn</b></span>(int <i>firstColumn</i>)</td></tr>
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<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b><a href="qhbarmodelmapper.html#firstColumnChanged">firstColumnChanged</a></b></span>()</td></tr>
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<!-- @@@firstColumn -->
<!-- $$$lastBarSetRow-prop$$$lastBarSetRow$$$setLastBarSetRowint$$$lastBarSetRowChanged -->
<h3 class="fn" id="lastBarSetRow-prop"><a name="lastBarSetRow-prop"></a><span class="name">lastBarSetRow</span> : <span class="type">int</span></h3>
<p>This property holds the row of the model that is used as the data source for the last bar set.</p>
<p>The default value is -1 (invalid mapping).</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> int </td><td class="memItemRight bottomAlign"><span class="name"><b>lastBarSetRow</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setLastBarSetRow</b></span>(int <i>lastBarSetRow</i>)</td></tr>
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<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b><a href="qhbarmodelmapper.html#lastBarSetRowChanged">lastBarSetRowChanged</a></b></span>()</td></tr>
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<!-- @@@lastBarSetRow -->
<!-- $$$model-prop$$$model$$$setModelQAbstractItemModel*$$$modelReplaced -->
<h3 class="fn" id="model-prop"><a name="model-prop"></a><span class="name">model</span> : <span class="type">QAbstractItemModel</span> *</h3>
<p>Defines the model that is used by the mapper.</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> QAbstractItemModel *</td><td class="memItemRight bottomAlign"><span class="name"><b>model</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setModel</b></span>(QAbstractItemModel *<i>model</i>)</td></tr>
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<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b><a href="qhbarmodelmapper.html#modelReplaced">modelReplaced</a></b></span>()</td></tr>
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<!-- @@@model -->
<!-- $$$series-prop$$$series$$$setSeriesQAbstractBarSeries*$$$seriesReplaced -->
<h3 class="fn" id="series-prop"><a name="series-prop"></a><span class="name">series</span> : <span class="type"><a href="qabstractbarseries.html">QAbstractBarSeries</a></span> *</h3>
<p>This property holds the bar series that is used by the mapper.</p>
<p>All the data in the series is discarded when it is set to the mapper. When a new series is specified, the old series is disconnected (but it preserves its data).</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> QAbstractBarSeries *</td><td class="memItemRight bottomAlign"><span class="name"><b>series</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setSeries</b></span>(QAbstractBarSeries *<i>series</i>)</td></tr>
</table></div>
<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b><a href="qhbarmodelmapper.html#seriesReplaced">seriesReplaced</a></b></span>()</td></tr>
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<!-- @@@series -->
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<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QHBarModelMapper[overload1]$$$QHBarModelMapperQObject* -->
<h3 class="fn" id="QHBarModelMapper"><a name="QHBarModelMapper"></a>QHBarModelMapper::<span class="name">QHBarModelMapper</span>(<span class="type">QObject</span> *<i>parent</i> = Q_NULLPTR)</h3>
<p>Constructs a mapper object that is a child of <i>parent</i>.</p>
<!-- @@@QHBarModelMapper -->
<!-- $$$columnCountChanged -->
<h3 class="fn" id="columnCountChanged"><a name="columnCountChanged"></a><code>[signal] </code><span class="type">void</span> QHBarModelMapper::<span class="name">columnCountChanged</span>()</h3>
<p>This signal is emitted when the number of columns changes.</p>
<p><b>Note:</b> Notifier signal for property <a href="qhbarmodelmapper.html#columnCount-prop">columnCount</a>. </p><!-- @@@columnCountChanged -->
<!-- $$$firstBarSetRowChanged -->
<h3 class="fn" id="firstBarSetRowChanged"><a name="firstBarSetRowChanged"></a><code>[signal] </code><span class="type">void</span> QHBarModelMapper::<span class="name">firstBarSetRowChanged</span>()</h3>
<p>This signal is emitted when the first bar set row changes.</p>
<p><b>Note:</b> Notifier signal for property <a href="qhbarmodelmapper.html#firstBarSetRow-prop">firstBarSetRow</a>. </p><!-- @@@firstBarSetRowChanged -->
<!-- $$$firstColumnChanged -->
<h3 class="fn" id="firstColumnChanged"><a name="firstColumnChanged"></a><code>[signal] </code><span class="type">void</span> QHBarModelMapper::<span class="name">firstColumnChanged</span>()</h3>
<p>This signal is emitted when the first column changes.</p>
<p><b>Note:</b> Notifier signal for property <a href="qhbarmodelmapper.html#firstColumn-prop">firstColumn</a>. </p><!-- @@@firstColumnChanged -->
<!-- $$$lastBarSetRowChanged -->
<h3 class="fn" id="lastBarSetRowChanged"><a name="lastBarSetRowChanged"></a><code>[signal] </code><span class="type">void</span> QHBarModelMapper::<span class="name">lastBarSetRowChanged</span>()</h3>
<p>This signal is emitted when the last bar set row changes.</p>
<p><b>Note:</b> Notifier signal for property <a href="qhbarmodelmapper.html#lastBarSetRow-prop">lastBarSetRow</a>. </p><!-- @@@lastBarSetRowChanged -->
<!-- $$$modelReplaced -->
<h3 class="fn" id="modelReplaced"><a name="modelReplaced"></a><code>[signal] </code><span class="type">void</span> QHBarModelMapper::<span class="name">modelReplaced</span>()</h3>
<p>This signal is emitted when the model that the mapper is connected to changes.</p>
<p><b>Note:</b> Notifier signal for property <a href="qhbarmodelmapper.html#model-prop">model</a>. </p><!-- @@@modelReplaced -->
<!-- $$$seriesReplaced -->
<h3 class="fn" id="seriesReplaced"><a name="seriesReplaced"></a><code>[signal] </code><span class="type">void</span> QHBarModelMapper::<span class="name">seriesReplaced</span>()</h3>
<p>This signal is emitted when the series that the mapper is connected to changes.</p>
<p><b>Note:</b> Notifier signal for property <a href="qhbarmodelmapper.html#series-prop">series</a>. </p><!-- @@@seriesReplaced -->
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