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     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the examples of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:BSD$

    10 ** You may use this file under the terms of the BSD license as follows:

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    12 ** Redistribution and use in source and binary forms, with or without

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    37 

    38 #ifndef MAINWIDGET_H

    39 #define MAINWIDGET_H

    40 

    41 #include <QWidget>

    42 #include <QIcon>

    43 #include <QtMultimedia/qaudio.h>

    44 

    45 class Engine;

    46 class FrequencySpectrum;

    47 class ProgressBar;

    48 class Spectrograph;

    49 class Waveform;

    50 class LevelMeter;

    51 class SettingsDialog;

    52 class ToneGeneratorDialog;

    53 class QAudioFormat;

    54 class QLabel;

    55 class QPushButton;

    56 class QMenu;

    57 class QAction;

    58 

    59 /**

    60  * Main application widget, responsible for connecting the various UI

    61  * elements to the Engine.

    62  */

    63 class MainWidget : public QWidget {

    64     Q_OBJECT

    65 public:

    66     MainWidget(QWidget *parent = 0);

    67     ~MainWidget();

    68 

    69     // QObject

    70     void timerEvent(QTimerEvent *event);

    71 

    72 public slots:

    73     void stateChanged(QAudio::Mode mode, QAudio::State state);

    74     void formatChanged(const QAudioFormat &format);

    75     void spectrumChanged(qint64 position, qint64 length,

    76                          const FrequencySpectrum &spectrum);

    77     void infoMessage(const QString &message, int timeoutMs);

    78     void errorMessage(const QString &heading, const QString &detail);

    79     void positionChanged(qint64 position);

    80     void bufferDurationChanged(qint64 duration);

    81 

    82 private slots:

    83     void showFileDialog();

    84     void showSettingsDialog();

    85     void showToneGeneratorDialog();

    86     void initializeRecord();

    87     void dataDurationChanged(qint64 duration);

    88 

    89 private:

    90     void createUi();

    91     void createMenus();

    92     void connectUi();

    93     void updateButtonStates();

    94     void reset();

    95 

    96     enum Mode {

    97         NoMode,

    98         RecordMode,

    99         GenerateToneMode,

   100         LoadFileMode

   101     };

   102 

   103     void setMode(Mode mode);

   104 

   105 private:

   106     Mode                    m_mode;

   107 

   108     Engine*                 m_engine;

   109 

   110     Waveform*               m_waveform;

   111     ProgressBar*            m_progressBar;

   112     Spectrograph*           m_spectrograph;

   113     LevelMeter*             m_levelMeter;

   114 

   115     QPushButton*            m_modeButton;

   116     QPushButton*            m_recordButton;

   117     QIcon                   m_recordIcon;

   118     QPushButton*            m_pauseButton;

   119     QIcon                   m_pauseIcon;

   120     QPushButton*            m_playButton;

   121     QIcon                   m_playIcon;

   122     QPushButton*            m_settingsButton;

   123     QIcon                   m_settingsIcon;

   124 

   125     QLabel*                 m_infoMessage;

   126     int                     m_infoMessageTimerId;

   127 

   128     SettingsDialog*         m_settingsDialog;

   129     ToneGeneratorDialog*    m_toneGeneratorDialog;

   130 

   131     QMenu*                  m_modeMenu;

   132     QAction*                m_loadFileAction;

   133     QAction*                m_generateToneAction;

   134     QAction*                m_recordAction;

   135 

   136 };

   137 

   138 #endif // MAINWIDGET_H