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<td >Qt 5.9</td><td ><a href="qtcharts-index.html">Qt Charts</a></td><td ><a href="qtcharts-examples.html">Qt Charts Examples</a></td><td >Custom Chart Example</td></tr></table><table class="buildversion"><tr>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#running-the-example">Running the Example</a></li>
<li class="level1"><a href="#customizing-charts">Customizing Charts</a></li>
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<h1 class="title">Custom Chart Example</h1>
<span class="subtitle"></span>
<!-- $$$customchart-description -->
<div class="descr"> <a name="details"></a>
<p class="centerAlign"><img src="images/examples_customchart.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="customizing-charts"></a>
<h2 id="customizing-charts">Customizing Charts</h2>
<p>We begin by creating a simple line series and a chart object.</p>
<pre class="cpp">
<span class="type"><a href="qlineseries.html">QLineSeries</a></span> <span class="operator">*</span>series <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qlineseries.html">QLineSeries</a></span>();
<span class="operator">*</span>series <span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">0</span><span class="operator">,</span> <span class="number">6</span>) <span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">9</span><span class="operator">,</span> <span class="number">4</span>) <span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">15</span><span class="operator">,</span> <span class="number">20</span>) <span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">25</span><span class="operator">,</span> <span class="number">12</span>) <span class="operator"><</span><span class="operator"><</span> <span class="type">QPointF</span>(<span class="number">29</span><span class="operator">,</span> <span class="number">26</span>);
<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>legend()<span class="operator">-</span><span class="operator">></span>hide();
chart<span class="operator">-</span><span class="operator">></span>addSeries(series);
</pre>
<p>First we customize the series and the chart's title and background.</p>
<pre class="cpp">
<span class="comment">// Customize series</span>
<span class="type">QPen</span> pen(<span class="type">QRgb</span>(<span class="number">0xfdb157</span>));
pen<span class="operator">.</span>setWidth(<span class="number">5</span>);
series<span class="operator">-</span><span class="operator">></span>setPen(pen);
<span class="comment">// Customize chart title</span>
<span class="type">QFont</span> font;
font<span class="operator">.</span>setPixelSize(<span class="number">18</span>);
chart<span class="operator">-</span><span class="operator">></span>setTitleFont(font);
chart<span class="operator">-</span><span class="operator">></span>setTitleBrush(<span class="type">QBrush</span>(<span class="type">Qt</span><span class="operator">::</span>white));
chart<span class="operator">-</span><span class="operator">></span>setTitle(<span class="string">"Customchart example"</span>);
<span class="comment">// Customize chart background</span>
<span class="type">QLinearGradient</span> backgroundGradient;
backgroundGradient<span class="operator">.</span>setStart(<span class="type">QPointF</span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span>));
backgroundGradient<span class="operator">.</span>setFinalStop(<span class="type">QPointF</span>(<span class="number">0</span><span class="operator">,</span> <span class="number">1</span>));
backgroundGradient<span class="operator">.</span>setColorAt(<span class="number">0.0</span><span class="operator">,</span> <span class="type">QRgb</span>(<span class="number">0xd2d0d1</span>));
backgroundGradient<span class="operator">.</span>setColorAt(<span class="number">1.0</span><span class="operator">,</span> <span class="type">QRgb</span>(<span class="number">0x4c4547</span>));
backgroundGradient<span class="operator">.</span>setCoordinateMode(<span class="type">QGradient</span><span class="operator">::</span>ObjectBoundingMode);
chart<span class="operator">-</span><span class="operator">></span>setBackgroundBrush(backgroundGradient);
<span class="comment">// Customize plot area background</span>
<span class="type">QLinearGradient</span> plotAreaGradient;
plotAreaGradient<span class="operator">.</span>setStart(<span class="type">QPointF</span>(<span class="number">0</span><span class="operator">,</span> <span class="number">1</span>));
plotAreaGradient<span class="operator">.</span>setFinalStop(<span class="type">QPointF</span>(<span class="number">1</span><span class="operator">,</span> <span class="number">0</span>));
plotAreaGradient<span class="operator">.</span>setColorAt(<span class="number">0.0</span><span class="operator">,</span> <span class="type">QRgb</span>(<span class="number">0x555555</span>));
plotAreaGradient<span class="operator">.</span>setColorAt(<span class="number">1.0</span><span class="operator">,</span> <span class="type">QRgb</span>(<span class="number">0x55aa55</span>));
plotAreaGradient<span class="operator">.</span>setCoordinateMode(<span class="type">QGradient</span><span class="operator">::</span>ObjectBoundingMode);
chart<span class="operator">-</span><span class="operator">></span>setPlotAreaBackgroundBrush(plotAreaGradient);
chart<span class="operator">-</span><span class="operator">></span>setPlotAreaBackgroundVisible(<span class="keyword">true</span>);
</pre>
<p>Then we customize the axes.</p>
<pre class="cpp">
<span class="type"><a href="qcategoryaxis.html">QCategoryAxis</a></span> <span class="operator">*</span>axisX <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcategoryaxis.html">QCategoryAxis</a></span>();
<span class="type"><a href="qcategoryaxis.html">QCategoryAxis</a></span> <span class="operator">*</span>axisY <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qcategoryaxis.html">QCategoryAxis</a></span>();
<span class="comment">// Customize axis label font</span>
<span class="type">QFont</span> labelsFont;
labelsFont<span class="operator">.</span>setPixelSize(<span class="number">12</span>);
axisX<span class="operator">-</span><span class="operator">></span>setLabelsFont(labelsFont);
axisY<span class="operator">-</span><span class="operator">></span>setLabelsFont(labelsFont);
<span class="comment">// Customize axis colors</span>
<span class="type">QPen</span> axisPen(<span class="type">QRgb</span>(<span class="number">0xd18952</span>));
axisPen<span class="operator">.</span>setWidth(<span class="number">2</span>);
axisX<span class="operator">-</span><span class="operator">></span>setLinePen(axisPen);
axisY<span class="operator">-</span><span class="operator">></span>setLinePen(axisPen);
<span class="comment">// Customize axis label colors</span>
<span class="type">QBrush</span> axisBrush(<span class="type">Qt</span><span class="operator">::</span>white);
axisX<span class="operator">-</span><span class="operator">></span>setLabelsBrush(axisBrush);
axisY<span class="operator">-</span><span class="operator">></span>setLabelsBrush(axisBrush);
<span class="comment">// Customize grid lines and shades</span>
axisX<span class="operator">-</span><span class="operator">></span>setGridLineVisible(<span class="keyword">false</span>);
axisY<span class="operator">-</span><span class="operator">></span>setGridLineVisible(<span class="keyword">false</span>);
axisY<span class="operator">-</span><span class="operator">></span>setShadesPen(<span class="type">Qt</span><span class="operator">::</span>NoPen);
axisY<span class="operator">-</span><span class="operator">></span>setShadesBrush(<span class="type">QBrush</span>(<span class="type">QColor</span>(<span class="number">0x99</span><span class="operator">,</span> <span class="number">0xcc</span><span class="operator">,</span> <span class="number">0xcc</span><span class="operator">,</span> <span class="number">0x55</span>)));
axisY<span class="operator">-</span><span class="operator">></span>setShadesVisible(<span class="keyword">true</span>);
</pre>
<p>Then the axis label values and ranges. Once the axes are ready, we set them to be used by the chart.</p>
<pre class="cpp">
axisX<span class="operator">-</span><span class="operator">></span>append(<span class="string">"low"</span><span class="operator">,</span> <span class="number">10</span>);
axisX<span class="operator">-</span><span class="operator">></span>append(<span class="string">"optimal"</span><span class="operator">,</span> <span class="number">20</span>);
axisX<span class="operator">-</span><span class="operator">></span>append(<span class="string">"high"</span><span class="operator">,</span> <span class="number">30</span>);
axisX<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="number">30</span>);
axisY<span class="operator">-</span><span class="operator">></span>append(<span class="string">"slow"</span><span class="operator">,</span> <span class="number">10</span>);
axisY<span class="operator">-</span><span class="operator">></span>append(<span class="string">"med"</span><span class="operator">,</span> <span class="number">20</span>);
axisY<span class="operator">-</span><span class="operator">></span>append(<span class="string">"fast"</span><span class="operator">,</span> <span class="number">30</span>);
axisY<span class="operator">-</span><span class="operator">></span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="number">30</span>);
chart<span class="operator">-</span><span class="operator">></span>setAxisX(axisX<span class="operator">,</span> series);
chart<span class="operator">-</span><span class="operator">></span>setAxisY(axisY<span class="operator">,</span> series);
</pre>
<p>Finally, we create a view containing the chart.</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>Now we are ready to show the chart on a main window.</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">400</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-customchart-main-cpp.html">customchart/main.cpp</a></li>
<li><a href="qtcharts-customchart-customchart-pro.html">customchart/customchart.pro</a></li>
</ul>
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<!-- @@@customchart -->
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<acronym title="Copyright">©</acronym> 2017 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
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