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<h1 class="title">main.cpp Example File</h1>
<span class="subtitle">stackedbarchartdrilldown/main.cpp</span>
<!-- $$$stackedbarchartdrilldown/main.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">
<span class="comment">/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Charts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="preprocessor">#include <QtWidgets/QApplication></span>
<span class="preprocessor">#include <QtWidgets/QMainWindow></span>
<span class="preprocessor">#include <QtCharts/QChartView></span>
<span class="preprocessor">#include <QtCharts/QBarSet></span>
<span class="preprocessor">#include <QtCharts/QLegend></span>
<span class="preprocessor">#include "drilldownseries.h"</span>
<span class="preprocessor">#include "drilldownchart.h"</span>
QT_CHARTS_USE_NAMESPACE
<span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span>argv<span class="operator">[</span><span class="operator">]</span>)
{
<span class="type">QApplication</span> a(argc<span class="operator">,</span> argv);
<span class="type">QMainWindow</span> window;
DrilldownChart <span class="operator">*</span>drilldownChart <span class="operator">=</span> <span class="keyword">new</span> DrilldownChart();
drilldownChart<span class="operator">-</span><span class="operator">></span>setAnimationOptions(<span class="type"><a href="qchart.html">QChart</a></span><span class="operator">::</span>SeriesAnimations);
<span class="comment">// Define categories</span>
<span class="keyword">const</span> <span class="type">QStringList</span> months <span class="operator">=</span> {
<span class="string">"May"</span><span class="operator">,</span> <span class="string">"Jun"</span><span class="operator">,</span> <span class="string">"Jul"</span><span class="operator">,</span> <span class="string">"Aug"</span><span class="operator">,</span> <span class="string">"Sep"</span>
};
<span class="keyword">const</span> <span class="type">QStringList</span> weeks <span class="operator">=</span> {
<span class="string">"week 1"</span><span class="operator">,</span> <span class="string">"week 2"</span><span class="operator">,</span> <span class="string">"week 3"</span><span class="operator">,</span> <span class="string">"week 4"</span>
};
<span class="keyword">const</span> <span class="type">QStringList</span> plants <span class="operator">=</span> {
<span class="string">"Habanero"</span><span class="operator">,</span> <span class="string">"Lemon Drop"</span><span class="operator">,</span> <span class="string">"Starfish"</span><span class="operator">,</span> <span class="string">"Aji Amarillo"</span>
};
<span class="comment">// Create drilldown structure</span>
DrilldownBarSeries <span class="operator">*</span>seasonSeries <span class="operator">=</span> <span class="keyword">new</span> DrilldownBarSeries(months<span class="operator">,</span> drilldownChart);
seasonSeries<span class="operator">-</span><span class="operator">></span>setName(<span class="string">"Crop by month - Season"</span>);
<span class="comment">// Each month in season series has drilldown series for weekly data</span>
<span class="keyword">for</span> (<span class="type">int</span> month <span class="operator">=</span> <span class="number">0</span>; month <span class="operator"><</span> months<span class="operator">.</span>count(); month<span class="operator">+</span><span class="operator">+</span>) {
<span class="comment">// Create drilldown series for every week</span>
DrilldownBarSeries <span class="operator">*</span>weeklySeries <span class="operator">=</span> <span class="keyword">new</span> DrilldownBarSeries(weeks<span class="operator">,</span> drilldownChart);
seasonSeries<span class="operator">-</span><span class="operator">></span>mapDrilldownSeries(month<span class="operator">,</span> weeklySeries);
<span class="comment">// Drilling down from weekly data brings us back to season data.</span>
<span class="keyword">for</span> (<span class="type">int</span> week <span class="operator">=</span> <span class="number">0</span>; week <span class="operator"><</span> weeks<span class="operator">.</span>count(); week<span class="operator">+</span><span class="operator">+</span>) {
weeklySeries<span class="operator">-</span><span class="operator">></span>mapDrilldownSeries(week<span class="operator">,</span> seasonSeries);
weeklySeries<span class="operator">-</span><span class="operator">></span>setName(<span class="type">QString</span>(<span class="string">"Crop by week - "</span> <span class="operator">+</span> months<span class="operator">.</span>at(month)));
}
<span class="comment">// Use clicked signal to implement drilldown</span>
<span class="type">QObject</span><span class="operator">::</span>connect(weeklySeries<span class="operator">,</span> <span class="operator">&</span>DrilldownBarSeries<span class="operator">::</span>clicked<span class="operator">,</span>
drilldownChart<span class="operator">,</span> <span class="operator">&</span>DrilldownChart<span class="operator">::</span>handleClicked);
}
<span class="comment">// Enable drilldown from season series using clicked signal</span>
<span class="type">QObject</span><span class="operator">::</span>connect(seasonSeries<span class="operator">,</span> <span class="operator">&</span>DrilldownBarSeries<span class="operator">::</span>clicked<span class="operator">,</span>
drilldownChart<span class="operator">,</span> <span class="operator">&</span>DrilldownChart<span class="operator">::</span>handleClicked);
<span class="comment">// Fill monthly and weekly series with data</span>
<span class="keyword">for</span> (<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>plant : plants) {
<span class="type"><a href="qbarset.html">QBarSet</a></span> <span class="operator">*</span>monthlyCrop <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qbarset.html">QBarSet</a></span>(plant);
<span class="keyword">for</span> (<span class="type">int</span> month <span class="operator">=</span> <span class="number">0</span>; month <span class="operator"><</span> months<span class="operator">.</span>count(); month<span class="operator">+</span><span class="operator">+</span>) {
<span class="type"><a href="qbarset.html">QBarSet</a></span> <span class="operator">*</span>weeklyCrop <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qbarset.html">QBarSet</a></span>(plant);
<span class="keyword">for</span> (<span class="type">int</span> week <span class="operator">=</span> <span class="number">0</span>; week <span class="operator"><</span> weeks<span class="operator">.</span>count(); week<span class="operator">+</span><span class="operator">+</span>)
<span class="operator">*</span>weeklyCrop <span class="operator"><</span><span class="operator"><</span> (qrand() <span class="operator">%</span> <span class="number">20</span>);
<span class="comment">// Get the drilldown series from season series and add crop to it.</span>
seasonSeries<span class="operator">-</span><span class="operator">></span>drilldownSeries(month)<span class="operator">-</span><span class="operator">></span>append(weeklyCrop);
<span class="operator">*</span>monthlyCrop <span class="operator"><</span><span class="operator"><</span> weeklyCrop<span class="operator">-</span><span class="operator">></span>sum();
}
seasonSeries<span class="operator">-</span><span class="operator">></span>append(monthlyCrop);
}
<span class="comment">// Show season series in initial view</span>
drilldownChart<span class="operator">-</span><span class="operator">></span>changeSeries(seasonSeries);
drilldownChart<span class="operator">-</span><span class="operator">></span>setTitle(seasonSeries<span class="operator">-</span><span class="operator">></span>name());
drilldownChart<span class="operator">-</span><span class="operator">></span>axisX()<span class="operator">-</span><span class="operator">></span>setGridLineVisible(<span class="keyword">false</span>);
drilldownChart<span class="operator">-</span><span class="operator">></span>legend()<span class="operator">-</span><span class="operator">></span>setVisible(<span class="keyword">true</span>);
drilldownChart<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);
<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>(drilldownChart);
window<span class="operator">.</span>setCentralWidget(chartView);
window<span class="operator">.</span>resize(<span class="number">480</span><span class="operator">,</span> <span class="number">300</span>);
window<span class="operator">.</span>show();
<span class="keyword">return</span> a<span class="operator">.</span>exec();
}
</pre>
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<!-- @@@stackedbarchartdrilldown/main.cpp -->
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