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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 &lt;QtWidgets/QApplication&gt;</span>
  <span class="preprocessor">#include &lt;QtWidgets/QMainWindow&gt;</span>
  <span class="preprocessor">#include &lt;QtCharts/QChartView&gt;</span>
  <span class="preprocessor">#include &lt;QtCharts/QBarSet&gt;</span>
  <span class="preprocessor">#include &lt;QtCharts/QLegend&gt;</span>
  <span class="preprocessor">#include &quot;drilldownseries.h&quot;</span>
  <span class="preprocessor">#include &quot;drilldownchart.h&quot;</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">&gt;</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">&quot;May&quot;</span><span class="operator">,</span> <span class="string">&quot;Jun&quot;</span><span class="operator">,</span> <span class="string">&quot;Jul&quot;</span><span class="operator">,</span> <span class="string">&quot;Aug&quot;</span><span class="operator">,</span> <span class="string">&quot;Sep&quot;</span>
      };
      <span class="keyword">const</span> <span class="type">QStringList</span> weeks <span class="operator">=</span> {
          <span class="string">&quot;week 1&quot;</span><span class="operator">,</span> <span class="string">&quot;week 2&quot;</span><span class="operator">,</span> <span class="string">&quot;week 3&quot;</span><span class="operator">,</span> <span class="string">&quot;week 4&quot;</span>
      };
      <span class="keyword">const</span> <span class="type">QStringList</span> plants <span class="operator">=</span> {
          <span class="string">&quot;Habanero&quot;</span><span class="operator">,</span> <span class="string">&quot;Lemon Drop&quot;</span><span class="operator">,</span> <span class="string">&quot;Starfish&quot;</span><span class="operator">,</span> <span class="string">&quot;Aji Amarillo&quot;</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">&gt;</span>setName(<span class="string">&quot;Crop by month - Season&quot;</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">&lt;</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">&gt;</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">&lt;</span> weeks<span class="operator">.</span>count(); week<span class="operator">+</span><span class="operator">+</span>) {
              weeklySeries<span class="operator">-</span><span class="operator">&gt;</span>mapDrilldownSeries(week<span class="operator">,</span> seasonSeries);
              weeklySeries<span class="operator">-</span><span class="operator">&gt;</span>setName(<span class="type">QString</span>(<span class="string">&quot;Crop by week - &quot;</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">&amp;</span>DrilldownBarSeries<span class="operator">::</span>clicked<span class="operator">,</span>
                           drilldownChart<span class="operator">,</span> <span class="operator">&amp;</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">&amp;</span>DrilldownBarSeries<span class="operator">::</span>clicked<span class="operator">,</span>
                       drilldownChart<span class="operator">,</span> <span class="operator">&amp;</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">&amp;</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">&lt;</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">&lt;</span> weeks<span class="operator">.</span>count(); week<span class="operator">+</span><span class="operator">+</span>)
                  <span class="operator">*</span>weeklyCrop <span class="operator">&lt;</span><span class="operator">&lt;</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">&gt;</span>drilldownSeries(month)<span class="operator">-</span><span class="operator">&gt;</span>append(weeklyCrop);
              <span class="operator">*</span>monthlyCrop <span class="operator">&lt;</span><span class="operator">&lt;</span> weeklyCrop<span class="operator">-</span><span class="operator">&gt;</span>sum();
          }
          seasonSeries<span class="operator">-</span><span class="operator">&gt;</span>append(monthlyCrop);
      }

      <span class="comment">// Show season series in initial view</span>
      drilldownChart<span class="operator">-</span><span class="operator">&gt;</span>changeSeries(seasonSeries);
      drilldownChart<span class="operator">-</span><span class="operator">&gt;</span>setTitle(seasonSeries<span class="operator">-</span><span class="operator">&gt;</span>name());

      drilldownChart<span class="operator">-</span><span class="operator">&gt;</span>axisX()<span class="operator">-</span><span class="operator">&gt;</span>setGridLineVisible(<span class="keyword">false</span>);
      drilldownChart<span class="operator">-</span><span class="operator">&gt;</span>legend()<span class="operator">-</span><span class="operator">&gt;</span>setVisible(<span class="keyword">true</span>);
      drilldownChart<span class="operator">-</span><span class="operator">&gt;</span>legend()<span class="operator">-</span><span class="operator">&gt;</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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