/****************************************************************************

**

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

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

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

**

** $QT_BEGIN_LICENSE:BSD$

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

**

**

** $QT_END_LICENSE$

**

#ifndef MAINWIDGET_H

#define MAINWIDGET_H

#include <QWidget>

#include <QIcon>

#include <QtMultimedia/qaudio.h>

class Engine;

class FrequencySpectrum;

class ProgressBar;

class Spectrograph;

class Waveform;

class LevelMeter;

class SettingsDialog;

class ToneGeneratorDialog;

/**

 * Main application widget, responsible for connecting the various UI

 * elements to the Engine.

 */

class MainWidget : public QWidget {

    Q_OBJECT

public:

    MainWidget(QWidget *parent = 0);

    ~MainWidget();

    // QObject

    void timerEvent(QTimerEvent *event);

public slots:

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

    void formatChanged(const QAudioFormat &format);

    void spectrumChanged(qint64 position, qint64 length,

                         const FrequencySpectrum &spectrum);

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

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

    void positionChanged(qint64 position);

    void bufferDurationChanged(qint64 duration);

private slots:

    void showFileDialog();

    void showSettingsDialog();

    void showToneGeneratorDialog();

    void initializeRecord();

    void dataDurationChanged(qint64 duration);

private:

    void createUi();

    void createMenus();

    void connectUi();

    void updateButtonStates();

    void reset();

    enum Mode {

        NoMode,

        RecordMode,

        GenerateToneMode,

        LoadFileMode

    };

    void setMode(Mode mode);

private:

    Mode                    m_mode;

    Engine*                 m_engine;

    Waveform*               m_waveform;

    ProgressBar*            m_progressBar;

    Spectrograph*           m_spectrograph;

    LevelMeter*             m_levelMeter;

    QPushButton*            m_modeButton;

    QPushButton*            m_recordButton;

    QIcon                   m_recordIcon;

    QPushButton*            m_pauseButton;

    QIcon                   m_pauseIcon;

    QPushButton*            m_playButton;

    QIcon                   m_playIcon;

    QPushButton*            m_settingsButton;

    QIcon                   m_settingsIcon;

    QLabel*                 m_infoMessage;

    int                     m_infoMessageTimerId;

    SettingsDialog*         m_settingsDialog;

    ToneGeneratorDialog*    m_toneGeneratorDialog;

    QMenu*                  m_modeMenu;

    QAction*                m_loadFileAction;

    QAction*                m_generateToneAction;

    QAction*                m_recordAction;

};

#endif // MAINWIDGET_H