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# guitartunerui.h Example File

demos/mobile/guitartuner/src/guitartunerui.h

     /****************************************************************************
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     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the QtDeclarative module of the Qt Toolkit.
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     #ifndef GUITARTUNERUI_H
     #define GUITARTUNERUI_H

     #include <QWidget>
     #include <QDebug>

     namespace Ui {
         class GuitarTunerUI;
     }

     const qreal FrequencyE = 82.407;
     const qreal FrequencyA = 110.00;
     const qreal FrequencyD = 146.83;
     const qreal FrequencyG = 196.00;
     const qreal FrequencyB = 246.94;
     const qreal FrequencyE2 = 329.63;

     class GuitarTunerUI : public QWidget
     {
         Q_OBJECT

     public:
         explicit GuitarTunerUI(QWidget *parent = 0);
         ~GuitarTunerUI();

         qreal getVolume() const;
         bool getMuteState() const;
         qreal getMicrophoneSensitivity() const;
         bool isInputModeActive() const;
         qreal getFrequency() const;
         int getScaleMaximumValue() const;
         void setMaximumVoiceDifference(int max);
         void setMaximumPrecisionPerNote(int max);

     public slots:
         void toggleSound(bool off);
         void next();
         void prev();
         void changeVolume();
         void toggleInputOrOutput();

         void lowVoice();
         void voiceDifference(qreal difference);
         void correctFrequencyObtained();

     signals:
         void modeChanged(bool isInput);
         void volumeChanged(qreal volume);
         void microphoneSensitivityChanged(qreal sensitivity);
         void muteChanged(bool isMuted);
         void targetFrequencyChanged(qreal targetFrequency);

     protected:
         void changeEvent(QEvent *e);

     private:
         Ui::GuitarTunerUI *ui;
         void changeTone(int newIndex);
         qreal getVolumeFromSoundSlider() const;
         int m_currentToneIndex;
         QString m_currentToneString;
         qreal m_currentToneFrequency;
         void updateFrequencyByToneIndex(int index);
         bool m_outputActive;
         bool m_muted;
         qreal m_outputVolumeLevel;
         qreal m_inputVolumeLevel;
         int m_maximumPrecision;
     };

     #endif // GUITARTUNERUI_H