<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- qvboxplotmodelmapper.cpp --> <title>VBoxPlotModelMapper QML Type | Qt Charts 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</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> <td id="buildversion" width="100%" align="right"><a href="qtcharts-index.html">Qt Charts | Commercial or GPLv3</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <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">VBoxPlotModelMapper QML Type</h1> <span class="subtitle"></span> <!-- $$$VBoxPlotModelMapper-brief --> <p>Vertical model mapper for box plot series. <a href="#details">More...</a></p> <!-- @@@VBoxPlotModelMapper --> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> Import Statement:</td><td class="memItemRight bottomAlign"> import QtCharts 2.3</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Instantiates:</td><td class="memItemRight bottomAlign"> <a href="qml-qtcharts-vboxplotmodelmapper.html"><a href="qvboxplotmodelmapper.html">QVBoxPlotModelMapper</a></td></tr></table></div><ul> <li><a href="qml-qtcharts-vboxplotmodelmapper-members.html">List of all members, including inherited members</a></li> </ul> <a name="properties"></a> <h2 id="properties">Properties</h2> <ul> <li class="fn"><b><b><a href="qml-qtcharts-vboxplotmodelmapper.html#firstBoxSetColumn-prop">firstBoxSetColumn</a></b></b> : int</li> <li class="fn"><b><b><a href="qml-qtcharts-vboxplotmodelmapper.html#firstRow-prop">firstRow</a></b></b> : int</li> <li class="fn"><b><b><a href="qml-qtcharts-vboxplotmodelmapper.html#lastBoxSetColumn-prop">lastBoxSetColumn</a></b></b> : int</li> <li class="fn"><b><b><a href="qml-qtcharts-vboxplotmodelmapper.html#model-prop">model</a></b></b> : SomeModel</li> <li class="fn"><b><b><a href="qml-qtcharts-vboxplotmodelmapper.html#rowCount-prop">rowCount</a></b></b> : int</li> <li class="fn"><b><b><a href="qml-qtcharts-vboxplotmodelmapper.html#series-prop">series</a></b></b> : AbstractBarSeries</li> </ul> <!-- $$$VBoxPlotModelMapper-description --> <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> <!-- @@@VBoxPlotModelMapper --> <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 --> <br/> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>