/******************************************************************************** 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:**** "Redistribution and use in source and binary forms, with or without** modification, are permitted provided that the following conditions are** met:** * Redistributions of source code must retain the above copyright** notice, this list of conditions and the following disclaimer.** * Redistributions in binary form must reproduce the above copyright** notice, this list of conditions and the following disclaimer in** the documentation and/or other materials provided with the** distribution.** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor** the names of its contributors may be used to endorse or promote** products derived from this software without specific prior written** permission.**** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."** $QT_END_LICENSE$******************************************************************************/#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;QT_FORWARD_DECLARE_CLASS(QAudioFormat)QT_FORWARD_DECLARE_CLASS(QLabel)QT_FORWARD_DECLARE_CLASS(QPushButton)QT_FORWARD_DECLARE_CLASS(QMenu)QT_FORWARD_DECLARE_CLASS(QAction)/** * Main application widget, responsible for connecting the various UI * elements to the Engine. */class MainWidget : public QWidget { Q_OBJECTpublic: 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