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<h1 class="title">mainwindow.cpp Example File</h1>
<span class="subtitle">hello_speak/mainwindow.cpp</span>
<!-- $$$hello_speak/mainwindow.cpp-description -->
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<pre class="cpp">

  <span class="comment">/****************************************************************************
  **
  ** Copyright (C) 2017 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
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  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
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  ** and conditions see https://www.qt.io/terms-conditions. For further
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  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
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  <span class="preprocessor">#include &quot;mainwindow.h&quot;</span>
  <span class="preprocessor">#include &lt;QLoggingCategory&gt;</span>

  MainWindow<span class="operator">::</span>MainWindow(<span class="type">QWidget</span> <span class="operator">*</span>parent)
      : <span class="type">QMainWindow</span>(parent)<span class="operator">,</span>
      m_speech(<span class="number">0</span>)
  {
      ui<span class="operator">.</span>setupUi(<span class="keyword">this</span>);
      <span class="type">QLoggingCategory</span><span class="operator">::</span>setFilterRules(<span class="type">QStringLiteral</span>(<span class="string">&quot;qt.speech.tts=true \n qt.speech.tts.*=true&quot;</span>));

      <span class="comment">// Populate engine selection list</span>
      ui<span class="operator">.</span>engine<span class="operator">-</span><span class="operator">&gt;</span>addItem(<span class="string">&quot;Default&quot;</span><span class="operator">,</span> <span class="type">QString</span>(<span class="string">&quot;default&quot;</span>));
      foreach (<span class="type">QString</span> engine<span class="operator">,</span> <span class="type">QTextToSpeech</span><span class="operator">::</span>availableEngines())
          ui<span class="operator">.</span>engine<span class="operator">-</span><span class="operator">&gt;</span>addItem(engine<span class="operator">,</span> engine);
      ui<span class="operator">.</span>engine<span class="operator">-</span><span class="operator">&gt;</span>setCurrentIndex(<span class="number">0</span>);
      engineSelected(<span class="number">0</span>);

      connect(ui<span class="operator">.</span>speakButton<span class="operator">,</span> <span class="operator">&amp;</span><span class="type">QPushButton</span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>speak);
      connect(ui<span class="operator">.</span>pitch<span class="operator">,</span> <span class="operator">&amp;</span><span class="type">QSlider</span><span class="operator">::</span>valueChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>setPitch);
      connect(ui<span class="operator">.</span>rate<span class="operator">,</span> <span class="operator">&amp;</span><span class="type">QSlider</span><span class="operator">::</span>valueChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>setRate);
      connect(ui<span class="operator">.</span>volume<span class="operator">,</span> <span class="operator">&amp;</span><span class="type">QSlider</span><span class="operator">::</span>valueChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>setVolume);
      connect(ui<span class="operator">.</span>engine<span class="operator">,</span> <span class="keyword">static_cast</span><span class="operator">&lt;</span><span class="type">void</span> (<span class="type">QComboBox</span><span class="operator">::</span><span class="operator">*</span>)(<span class="type">int</span>)<span class="operator">&gt;</span>(<span class="operator">&amp;</span><span class="type">QComboBox</span><span class="operator">::</span>currentIndexChanged)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>engineSelected);
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>speak()
  {
      m_speech<span class="operator">-</span><span class="operator">&gt;</span>say(ui<span class="operator">.</span>plainTextEdit<span class="operator">-</span><span class="operator">&gt;</span>toPlainText());
  }
  <span class="type">void</span> MainWindow<span class="operator">::</span>stop()
  {
      m_speech<span class="operator">-</span><span class="operator">&gt;</span>stop();
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>setRate(<span class="type">int</span> rate)
  {
      m_speech<span class="operator">-</span><span class="operator">&gt;</span>setRate(rate <span class="operator">/</span> <span class="number">10.0</span>);
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>setPitch(<span class="type">int</span> pitch)
  {
      m_speech<span class="operator">-</span><span class="operator">&gt;</span>setPitch(pitch <span class="operator">/</span> <span class="number">10.0</span>);
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>setVolume(<span class="type">int</span> volume)
  {
      m_speech<span class="operator">-</span><span class="operator">&gt;</span>setVolume(volume <span class="operator">/</span> <span class="number">100.0</span>);
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>stateChanged(<span class="type">QTextToSpeech</span><span class="operator">::</span>State state)
  {
      <span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> <span class="type">QTextToSpeech</span><span class="operator">::</span>Speaking) {
          ui<span class="operator">.</span>statusbar<span class="operator">-</span><span class="operator">&gt;</span>showMessage(<span class="string">&quot;Speech started...&quot;</span>);
      } <span class="keyword">else</span> <span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> <span class="type">QTextToSpeech</span><span class="operator">::</span>Ready)
          ui<span class="operator">.</span>statusbar<span class="operator">-</span><span class="operator">&gt;</span>showMessage(<span class="string">&quot;Speech stopped...&quot;</span><span class="operator">,</span> <span class="number">2000</span>);
      <span class="keyword">else</span> <span class="keyword">if</span> (state <span class="operator">=</span><span class="operator">=</span> <span class="type">QTextToSpeech</span><span class="operator">::</span>Paused)
          ui<span class="operator">.</span>statusbar<span class="operator">-</span><span class="operator">&gt;</span>showMessage(<span class="string">&quot;Speech paused...&quot;</span>);
      <span class="keyword">else</span>
          ui<span class="operator">.</span>statusbar<span class="operator">-</span><span class="operator">&gt;</span>showMessage(<span class="string">&quot;Speech error!&quot;</span>);

      ui<span class="operator">.</span>pauseButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(state <span class="operator">=</span><span class="operator">=</span> <span class="type">QTextToSpeech</span><span class="operator">::</span>Speaking);
      ui<span class="operator">.</span>resumeButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(state <span class="operator">=</span><span class="operator">=</span> <span class="type">QTextToSpeech</span><span class="operator">::</span>Paused);
      ui<span class="operator">.</span>stopButton<span class="operator">-</span><span class="operator">&gt;</span>setEnabled(state <span class="operator">=</span><span class="operator">=</span> <span class="type">QTextToSpeech</span><span class="operator">::</span>Speaking <span class="operator">|</span><span class="operator">|</span> state <span class="operator">=</span><span class="operator">=</span> <span class="type">QTextToSpeech</span><span class="operator">::</span>Paused);
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>engineSelected(<span class="type">int</span> index)
  {
      <span class="type">QString</span> engineName <span class="operator">=</span> ui<span class="operator">.</span>engine<span class="operator">-</span><span class="operator">&gt;</span>itemData(index)<span class="operator">.</span>toString();
      <span class="keyword">delete</span> m_speech;
      <span class="keyword">if</span> (engineName <span class="operator">=</span><span class="operator">=</span> <span class="string">&quot;default&quot;</span>)
          m_speech <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QTextToSpeech</span>(<span class="keyword">this</span>);
      <span class="keyword">else</span>
          m_speech <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QTextToSpeech</span>(engineName<span class="operator">,</span> <span class="keyword">this</span>);
      disconnect(ui<span class="operator">.</span>language<span class="operator">,</span> <span class="keyword">static_cast</span><span class="operator">&lt;</span><span class="type">void</span> (<span class="type">QComboBox</span><span class="operator">::</span><span class="operator">*</span>)(<span class="type">int</span>)<span class="operator">&gt;</span>(<span class="operator">&amp;</span><span class="type">QComboBox</span><span class="operator">::</span>currentIndexChanged)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>languageSelected);
      ui<span class="operator">.</span>language<span class="operator">-</span><span class="operator">&gt;</span>clear();
      <span class="comment">// Populate the languages combobox before connecting its signal.</span>
      <span class="type">QVector</span><span class="operator">&lt;</span><span class="type">QLocale</span><span class="operator">&gt;</span> locales <span class="operator">=</span> m_speech<span class="operator">-</span><span class="operator">&gt;</span>availableLocales();
      <span class="type">QLocale</span> current <span class="operator">=</span> m_speech<span class="operator">-</span><span class="operator">&gt;</span>locale();
      foreach (<span class="keyword">const</span> <span class="type">QLocale</span> <span class="operator">&amp;</span>locale<span class="operator">,</span> locales) {
          <span class="type">QString</span> name(<span class="type">QString</span>(<span class="string">&quot;%1 (%2)&quot;</span>)
                       <span class="operator">.</span>arg(<span class="type">QLocale</span><span class="operator">::</span>languageToString(locale<span class="operator">.</span>language()))
                       <span class="operator">.</span>arg(<span class="type">QLocale</span><span class="operator">::</span>countryToString(locale<span class="operator">.</span>country())));
          <span class="type">QVariant</span> localeVariant(locale);
          ui<span class="operator">.</span>language<span class="operator">-</span><span class="operator">&gt;</span>addItem(name<span class="operator">,</span> localeVariant);
          <span class="keyword">if</span> (locale<span class="operator">.</span>name() <span class="operator">=</span><span class="operator">=</span> current<span class="operator">.</span>name())
              current <span class="operator">=</span> locale;
      }
      setRate(ui<span class="operator">.</span>rate<span class="operator">-</span><span class="operator">&gt;</span>value());
      setPitch(ui<span class="operator">.</span>pitch<span class="operator">-</span><span class="operator">&gt;</span>value());
      setVolume(ui<span class="operator">.</span>volume<span class="operator">-</span><span class="operator">&gt;</span>value());
      connect(ui<span class="operator">.</span>stopButton<span class="operator">,</span> <span class="operator">&amp;</span><span class="type">QPushButton</span><span class="operator">::</span>clicked<span class="operator">,</span> m_speech<span class="operator">,</span> <span class="operator">&amp;</span><span class="type">QTextToSpeech</span><span class="operator">::</span>stop);
      connect(ui<span class="operator">.</span>pauseButton<span class="operator">,</span> <span class="operator">&amp;</span><span class="type">QPushButton</span><span class="operator">::</span>clicked<span class="operator">,</span> m_speech<span class="operator">,</span> <span class="operator">&amp;</span><span class="type">QTextToSpeech</span><span class="operator">::</span>pause);
      connect(ui<span class="operator">.</span>resumeButton<span class="operator">,</span> <span class="operator">&amp;</span><span class="type">QPushButton</span><span class="operator">::</span>clicked<span class="operator">,</span> m_speech<span class="operator">,</span> <span class="operator">&amp;</span><span class="type">QTextToSpeech</span><span class="operator">::</span>resume);

      connect(m_speech<span class="operator">,</span> <span class="operator">&amp;</span><span class="type">QTextToSpeech</span><span class="operator">::</span>stateChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>stateChanged);
      connect(m_speech<span class="operator">,</span> <span class="operator">&amp;</span><span class="type">QTextToSpeech</span><span class="operator">::</span>localeChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>localeChanged);

      connect(ui<span class="operator">.</span>language<span class="operator">,</span> <span class="keyword">static_cast</span><span class="operator">&lt;</span><span class="type">void</span> (<span class="type">QComboBox</span><span class="operator">::</span><span class="operator">*</span>)(<span class="type">int</span>)<span class="operator">&gt;</span>(<span class="operator">&amp;</span><span class="type">QComboBox</span><span class="operator">::</span>currentIndexChanged)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>languageSelected);
      localeChanged(current);
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>languageSelected(<span class="type">int</span> language)
  {
      <span class="type">QLocale</span> locale <span class="operator">=</span> ui<span class="operator">.</span>language<span class="operator">-</span><span class="operator">&gt;</span>itemData(language)<span class="operator">.</span>toLocale();
      m_speech<span class="operator">-</span><span class="operator">&gt;</span>setLocale(locale);
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>voiceSelected(<span class="type">int</span> index)
  {
      m_speech<span class="operator">-</span><span class="operator">&gt;</span>setVoice(m_voices<span class="operator">.</span>at(index));
  }

  <span class="type">void</span> MainWindow<span class="operator">::</span>localeChanged(<span class="keyword">const</span> <span class="type">QLocale</span> <span class="operator">&amp;</span>locale)
  {
      <span class="type">QVariant</span> localeVariant(locale);
      ui<span class="operator">.</span>language<span class="operator">-</span><span class="operator">&gt;</span>setCurrentIndex(ui<span class="operator">.</span>language<span class="operator">-</span><span class="operator">&gt;</span>findData(localeVariant));

      disconnect(ui<span class="operator">.</span>voice<span class="operator">,</span> <span class="keyword">static_cast</span><span class="operator">&lt;</span><span class="type">void</span> (<span class="type">QComboBox</span><span class="operator">::</span><span class="operator">*</span>)(<span class="type">int</span>)<span class="operator">&gt;</span>(<span class="operator">&amp;</span><span class="type">QComboBox</span><span class="operator">::</span>currentIndexChanged)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>voiceSelected);
      ui<span class="operator">.</span>voice<span class="operator">-</span><span class="operator">&gt;</span>clear();

      m_voices <span class="operator">=</span> m_speech<span class="operator">-</span><span class="operator">&gt;</span>availableVoices();
      <span class="type">QVoice</span> currentVoice <span class="operator">=</span> m_speech<span class="operator">-</span><span class="operator">&gt;</span>voice();
      foreach (<span class="keyword">const</span> <span class="type">QVoice</span> <span class="operator">&amp;</span>voice<span class="operator">,</span> m_voices) {
          ui<span class="operator">.</span>voice<span class="operator">-</span><span class="operator">&gt;</span>addItem(<span class="type">QString</span>(<span class="string">&quot;%1 - %2 - %3&quot;</span>)<span class="operator">.</span>arg(voice<span class="operator">.</span>name())
                            <span class="operator">.</span>arg(<span class="type">QVoice</span><span class="operator">::</span>genderName(voice<span class="operator">.</span>gender()))
                            <span class="operator">.</span>arg(<span class="type">QVoice</span><span class="operator">::</span>ageName(voice<span class="operator">.</span>age())));
          <span class="keyword">if</span> (voice<span class="operator">.</span>name() <span class="operator">=</span><span class="operator">=</span> currentVoice<span class="operator">.</span>name())
              ui<span class="operator">.</span>voice<span class="operator">-</span><span class="operator">&gt;</span>setCurrentIndex(ui<span class="operator">.</span>voice<span class="operator">-</span><span class="operator">&gt;</span>count() <span class="operator">-</span> <span class="number">1</span>);
      }
      connect(ui<span class="operator">.</span>voice<span class="operator">,</span> <span class="keyword">static_cast</span><span class="operator">&lt;</span><span class="type">void</span> (<span class="type">QComboBox</span><span class="operator">::</span><span class="operator">*</span>)(<span class="type">int</span>)<span class="operator">&gt;</span>(<span class="operator">&amp;</span><span class="type">QComboBox</span><span class="operator">::</span>currentIndexChanged)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&amp;</span>MainWindow<span class="operator">::</span>voiceSelected);
  }

</pre>
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<!-- @@@hello_speak/mainwindow.cpp -->
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