<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<!-- examples-horizontalbarchart.qdoc -->
<title>HorizontalBarChart Example | 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-examples.html">Qt Charts Examples</a></td><td >HorizontalBarChart Example</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="#running-the-example">Running the Example</a></li>
<li class="level1"><a href="#creating-horizontal-bar-charts">Creating Horizontal Bar Charts</a></li>
</ul>
</div>
<div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">HorizontalBarChart Example</h1>
<span class="subtitle"></span>
<!-- $$$horizontalbarchart-brief -->
<p>The example shows how to create a horizontal bar chart.</p>
<!-- @@@horizontalbarchart -->
<!-- $$$horizontalbarchart-description -->
<div class="descr"> <a name="details"></a>
<p>QHorizontalBarChart shows the data in sets as separate bars, which are grouped in categories. QHorizontalBarChart works just like QBarChart, except that the bars are drawn horizontally on the chart.</p>
<p class="centerAlign"><img src="images/examples_horizontalbarchart.png" alt="" /></p><a name="running-the-example"></a>
<h2 id="running-the-example">Running the Example</h2>
<p>To run the example from Qt Creator, open the <b>Welcome</b> mode and select the example from <b>Examples</b>. For more information, visit Building and Running an Example.</p>
<a name="creating-horizontal-bar-charts"></a>
<h2 id="creating-horizontal-bar-charts">Creating Horizontal Bar Charts</h2>
<p>The bar sets are used in the same way in all bar charts. To illustrate the difference between various bar charts, we use the same data in all examples. Data that bar chart visualizes, is defined by <a href="qbarset.html">QBarSet</a> instances. Here we create the sets and append data to them. The data is appended here with << operator. Alternatively, the append method could also be used.</p>
<pre class="cpp">
<span class="type"><a href="qbarset.html">QBarSet</a></span> <span class="operator">*</span>set0 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qbarset.html">QBarSet</a></span>(<span class="string">"Jane"</span>);
<span class="type"><a href="qbarset.html">QBarSet</a></span> <span class="operator">*</span>set1 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qbarset.html">QBarSet</a></span>(<span class="string">"John"</span>);
<span class="type"><a href="qbarset.html">QBarSet</a></span> <span class="operator">*</span>set2 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qbarset.html">QBarSet</a></span>(<span class="string">"Axel"</span>);
<span class="type"><a href="qbarset.html">QBarSet</a></span> <span class="operator">*</span>set3 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qbarset.html">QBarSet</a></span>(<span class="string">"Mary"</span>);
<span class="type"><a href="qbarset.html">QBarSet</a></span> <span class="operator">*</span>set4 <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qbarset.html">QBarSet</a></span>(<span class="string">"Samantha"</span>);
<span class="operator">*</span>set0 <span class="operator"><</span><span class="operator"><</span> <span class="number">1</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">2</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">3</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">4</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">5</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">6</span>;
<span class="operator">*</span>set1 <span class="operator"><</span><span class="operator"><</span> <span class="number">5</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">0</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">0</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">4</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">0</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">7</span>;
<span class="operator">*</span>set2 <span class="operator"><</span><span class="operator"><</span> <span class="number">3</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">5</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">8</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">13</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">8</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">5</span>;
<span class="operator">*</span>set3 <span class="operator"><</span><span class="operator"><</span> <span class="number">5</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">6</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">7</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">3</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">4</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">5</span>;
<span class="operator">*</span>set4 <span class="operator"><</span><span class="operator"><</span> <span class="number">9</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">7</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">5</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">3</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">1</span> <span class="operator"><</span><span class="operator"><</span> <span class="number">2</span>;
</pre>
<p>We create the series and append the bar sets to it. The series takes ownership of the barsets. The series groups the data from sets to categories. The first values of each set are grouped together in the first category; the second values in the second category, and so on.</p>
<pre class="cpp">
<span class="type"><a href="qhorizontalbarseries.html">QHorizontalBarSeries</a></span> <span class="operator">*</span>series <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qhorizontalbarseries.html">QHorizontalBarSeries</a></span>();
series<span class="operator">-</span><span class="operator">></span>append(set0);
series<span class="operator">-</span><span class="operator">></span>append(set1);
series<span class="operator">-</span><span class="operator">></span>append(set2);
series<span class="operator">-</span><span class="operator">></span>append(set3);
series<span class="operator">-</span><span class="operator">></span>append(set4);
</pre>
<p>Here we create the chart object and add the series to it. We set the title for chart with setTitle and then turn on animations of the series by calling setAnimationOptions(<a href="qchart.html#AnimationOption-enum">QChart::SeriesAnimations</a>).</p>
<pre class="cpp">
<span class="type"><a href="qchart.html">QChart</a></span> <span class="operator">*</span>chart <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qchart.html">QChart</a></span>();
chart<span class="operator">-</span><span class="operator">></span>addSeries(series);
chart<span class="operator">-</span><span class="operator">></span>setTitle(<span class="string">"Simple horizontal barchart example"</span>);
chart<span class="operator">-</span><span class="operator">></span>setAnimationOptions(<span class="type"><a href="qchart.html">QChart</a></span><span class="operator">::</span>SeriesAnimations);
</pre>
<p>To have categories displayed on axis, we need to create a <a href="qbarcategoryaxis.html">QBarCategoryAxis</a> for that. Here we create a category axis with a list of categories and set it to be aligned to the left-hand side, acting as the y-axis, and attach it to the series. The chart takes ownership of the axis. For x-axis we use a value axis, aligned to the bottom.</p>
<pre class="cpp">
<span class="type">QStringList</span> categories;
categories <span class="operator"><</span><span class="operator"><</span> <span class="string">"Jan"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"Feb"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"Mar"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"Apr"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"May"</span> <span class="operator"><</span><span class="operator"><</span> <span class="string">"Jun"</span>;
<span class="type"><a href="qbarcategoryaxis.html">QBarCategoryAxis</a></span> <span class="operator">*</span>axisY <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qbarcategoryaxis.html">QBarCategoryAxis</a></span>();
axisY<span class="operator">-</span><span class="operator">></span>append(categories);
chart<span class="operator">-</span><span class="operator">></span>addAxis(axisY<span class="operator">,</span> <span class="type">Qt</span><span class="operator">::</span>AlignLeft);
series<span class="operator">-</span><span class="operator">></span>attachAxis(axisY);
<span class="type"><a href="qvalueaxis.html">QValueAxis</a></span> <span class="operator">*</span>axisX <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvalueaxis.html">QValueAxis</a></span>();
chart<span class="operator">-</span><span class="operator">></span>addAxis(axisX<span class="operator">,</span> <span class="type">Qt</span><span class="operator">::</span>AlignBottom);
series<span class="operator">-</span><span class="operator">></span>attachAxis(axisX);
axisX<span class="operator">-</span><span class="operator">></span>applyNiceNumbers();
</pre>
<p>We also want to show the legend. To do so, we get the legend pointer from chart and set it to visible. We also place the legend to the bottom of the chart by setting its alignment to Qt::AlignBottom.</p>
<pre class="cpp">
chart<span class="operator">-</span><span class="operator">></span>legend()<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">true</span>);
chart<span class="operator">-</span><span class="operator">></span>legend()<span class="operator">-</span><span class="operator">></span>setAlignment(<span class="type">Qt</span><span class="operator">::</span>AlignBottom);
</pre>
<p>Finally we add the chart onto a view. We also turn on the antialiasing for the chartView.</p>
<pre class="cpp">
<span class="type"><a href="qchartview.html">QChartView</a></span> <span class="operator">*</span>chartView <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qchartview.html">QChartView</a></span>(chart);
chartView<span class="operator">-</span><span class="operator">></span>setRenderHint(<span class="type">QPainter</span><span class="operator">::</span>Antialiasing);
</pre>
<p>The chart is ready to be shown. We set the chart to be the central widget of the window. We also set the size for the chart window and show it.</p>
<pre class="cpp">
<span class="type">QMainWindow</span> window;
window<span class="operator">.</span>setCentralWidget(chartView);
window<span class="operator">.</span>resize(<span class="number">420</span><span class="operator">,</span> <span class="number">300</span>);
window<span class="operator">.</span>show();
</pre>
<p>Files:</p>
<ul>
<li><a href="qtcharts-horizontalbarchart-horizontalbarchart-pro.html">horizontalbarchart/horizontalbarchart.pro</a></li>
<li><a href="qtcharts-horizontalbarchart-main-cpp.html">horizontalbarchart/main.cpp</a></li>
</ul>
</div>
<!-- @@@horizontalbarchart -->
</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>
