/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the examples of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:BSD$+
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** You may use this file under the terms of the BSD license as follows:+
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**+
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** "Redistribution and use in source and binary forms, with or without+
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** modification, are permitted provided that the following conditions are+
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** met:+
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**   * Redistributions of source code must retain the above copyright+
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**     notice, this list of conditions and the following disclaimer.+
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**   * Redistributions in binary form must reproduce the above copyright+
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**     notice, this list of conditions and the following disclaimer in+
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**     the documentation and/or other materials provided with the+
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**     distribution.+
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**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor+
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**     the names of its contributors may be used to endorse or promote+
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**     products derived from this software without specific prior written+
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**     permission.+
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**+
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS+
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT+
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR+
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT+
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,+
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT+
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,+
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY+
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT+
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE+
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef MAINWIDGET_H+
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#define MAINWIDGET_H+
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+
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#include <QWidget>+
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#include <QIcon>+
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#include <QtMultimedia/qaudio.h>+
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+
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class Engine;+
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class FrequencySpectrum;+
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class ProgressBar;+
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class Spectrograph;+
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class Waveform;+
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class LevelMeter;+
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class SettingsDialog;+
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class ToneGeneratorDialog;+
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+
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QT_FORWARD_DECLARE_CLASS(QAudioFormat)+
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QT_FORWARD_DECLARE_CLASS(QLabel)+
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QT_FORWARD_DECLARE_CLASS(QPushButton)+
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QT_FORWARD_DECLARE_CLASS(QMenu)+
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QT_FORWARD_DECLARE_CLASS(QAction)+
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+
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/**+
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 * Main application widget, responsible for connecting the various UI+
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 * elements to the Engine.+
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 */+
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class MainWidget : public QWidget {+
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    Q_OBJECT+
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public:+
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    MainWidget(QWidget *parent = 0);+
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    ~MainWidget();+
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+
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    // QObject+
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    void timerEvent(QTimerEvent *event);+
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+
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public slots:+
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    void stateChanged(QAudio::Mode mode, QAudio::State state);+
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    void formatChanged(const QAudioFormat &format);+
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    void spectrumChanged(qint64 position, qint64 length,+
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                         const FrequencySpectrum &spectrum);+
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    void infoMessage(const QString &message, int timeoutMs);+
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    void errorMessage(const QString &heading, const QString &detail);+
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    void positionChanged(qint64 position);+
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    void bufferDurationChanged(qint64 duration);+
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+
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private slots:+
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    void showFileDialog();+
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    void showSettingsDialog();+
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    void showToneGeneratorDialog();+
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    void initializeRecord();+
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    void dataDurationChanged(qint64 duration);+
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+
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private:+
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    void createUi();+
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    void createMenus();+
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    void connectUi();+
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    void updateButtonStates();+
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    void reset();+
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+
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    enum Mode {+
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        NoMode,+
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        RecordMode,+
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        GenerateToneMode,+
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        LoadFileMode+
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    };+
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+
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    void setMode(Mode mode);+
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+
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private:+
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    Mode                    m_mode;+
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+
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    Engine*                 m_engine;+
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+
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    Waveform*               m_waveform;+
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    ProgressBar*            m_progressBar;+
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    Spectrograph*           m_spectrograph;+
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    LevelMeter*             m_levelMeter;+
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+
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    QPushButton*            m_modeButton;+
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    QPushButton*            m_recordButton;+
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    QIcon                   m_recordIcon;+
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    QPushButton*            m_pauseButton;+
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    QIcon                   m_pauseIcon;+
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    QPushButton*            m_playButton;+
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    QIcon                   m_playIcon;+
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    QPushButton*            m_settingsButton;+
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    QIcon                   m_settingsIcon;+
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+
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    QLabel*                 m_infoMessage;+
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    int                     m_infoMessageTimerId;+
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+
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    SettingsDialog*         m_settingsDialog;+
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    ToneGeneratorDialog*    m_toneGeneratorDialog;+
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+
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    QMenu*                  m_modeMenu;+
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    QAction*                m_loadFileAction;+
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    QAction*                m_generateToneAction;+
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    QAction*                m_recordAction;+
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+
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};+
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+
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#endif // MAINWIDGET_H+
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