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+/****************************************************************************
+**
+** 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 TONEGENERATORDIALOG_H
+#define TONEGENERATORDIALOG_H
+
+#include "spectrum.h"
+#include <QDialog>
+#include <QtMultimedia/QAudioDeviceInfo>
+
+class QCheckBox;
+class QSlider;
+class QSpinBox;
+class QGridLayout;
+
+/**
+ * Dialog which controls the parameters of the tone generator.
+ */
+class ToneGeneratorDialog : public QDialog {
+    Q_OBJECT
+public:
+    ToneGeneratorDialog(QWidget *parent = 0);
+    ~ToneGeneratorDialog();
+
+    bool isFrequencySweepEnabled() const;
+    qreal frequency() const;
+    qreal amplitude() const;
+
+private slots:
+    void frequencySweepEnabled(bool enabled);
+
+private:
+    QCheckBox*      m_toneGeneratorSweepCheckBox;
+    bool            m_frequencySweepEnabled;
+    QWidget*        m_toneGeneratorControl;
+    QWidget*        m_toneGeneratorFrequencyControl;
+    QSlider*        m_frequencySlider;
+    QSpinBox*       m_frequencySpinBox;
+    qreal           m_frequency;
+    QSlider*        m_amplitudeSlider;
+
+};
+
+#endif // TONEGENERATORDIALOG_H