--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/demos/spectrum/app/tonegeneratordialog.cpp	Fri Jun 11 14:24:45 2010 +0300
@@ -0,0 +1,148 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "tonegeneratordialog.h"
+#include <QComboBox>
+#include <QDialogButtonBox>
+#include <QLabel>
+#include <QPushButton>
+#include <QVBoxLayout>
+#include <QCheckBox>
+#include <QSlider>
+#include <QSpinBox>
+
+const int ToneGeneratorFreqMin = 1;
+const int ToneGeneratorFreqMax = 1000;
+const int ToneGeneratorFreqDefault = 440;
+const int ToneGeneratorAmplitudeDefault = 75;
+
+ToneGeneratorDialog::ToneGeneratorDialog(QWidget *parent)
+    :   QDialog(parent)
+    ,   m_toneGeneratorSweepCheckBox(new QCheckBox(tr("Frequency sweep"), this))
+    ,   m_frequencySweepEnabled(true)
+    ,   m_toneGeneratorControl(new QWidget(this))
+    ,   m_toneGeneratorFrequencyControl(new QWidget(this))
+    ,   m_frequencySlider(new QSlider(Qt::Horizontal, this))
+    ,   m_frequencySpinBox(new QSpinBox(this))
+    ,   m_frequency(ToneGeneratorFreqDefault)
+    ,   m_amplitudeSlider(new QSlider(Qt::Horizontal, this))
+{
+    QVBoxLayout *dialogLayout = new QVBoxLayout(this);
+
+    m_toneGeneratorSweepCheckBox->setChecked(true);
+
+    // Configure tone generator controls
+    m_frequencySlider->setRange(ToneGeneratorFreqMin, ToneGeneratorFreqMax);
+    m_frequencySlider->setValue(ToneGeneratorFreqDefault);
+    m_frequencySpinBox->setRange(ToneGeneratorFreqMin, ToneGeneratorFreqMax);
+    m_frequencySpinBox->setValue(ToneGeneratorFreqDefault);
+    m_amplitudeSlider->setRange(0, 100);
+    m_amplitudeSlider->setValue(ToneGeneratorAmplitudeDefault);
+
+    // Add widgets to layout
+
+    QScopedPointer<QGridLayout> frequencyControlLayout(new QGridLayout);
+    QLabel *frequencyLabel = new QLabel(tr("Frequency (Hz)"), this);
+    frequencyControlLayout->addWidget(frequencyLabel, 0, 0, 2, 1);
+    frequencyControlLayout->addWidget(m_frequencySlider, 0, 1);
+    frequencyControlLayout->addWidget(m_frequencySpinBox, 1, 1);
+    m_toneGeneratorFrequencyControl->setLayout(frequencyControlLayout.data());
+    frequencyControlLayout.take(); // ownership transferred to m_toneGeneratorFrequencyControl
+    m_toneGeneratorFrequencyControl->setEnabled(false);
+
+    QScopedPointer<QGridLayout> toneGeneratorLayout(new QGridLayout);
+    QLabel *amplitudeLabel = new QLabel(tr("Amplitude"), this);
+    toneGeneratorLayout->addWidget(m_toneGeneratorSweepCheckBox, 0, 1);
+    toneGeneratorLayout->addWidget(m_toneGeneratorFrequencyControl, 1, 0, 1, 2);
+    toneGeneratorLayout->addWidget(amplitudeLabel, 2, 0);
+    toneGeneratorLayout->addWidget(m_amplitudeSlider, 2, 1);
+    m_toneGeneratorControl->setLayout(toneGeneratorLayout.data());
+    m_toneGeneratorControl->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
+    dialogLayout->addWidget(m_toneGeneratorControl);
+    toneGeneratorLayout.take(); // ownership transferred
+
+    // Connect
+    CHECKED_CONNECT(m_toneGeneratorSweepCheckBox, SIGNAL(toggled(bool)),
+                    this, SLOT(frequencySweepEnabled(bool)));
+    CHECKED_CONNECT(m_frequencySlider, SIGNAL(valueChanged(int)),
+                    m_frequencySpinBox, SLOT(setValue(int)));
+    CHECKED_CONNECT(m_frequencySpinBox, SIGNAL(valueChanged(int)),
+                    m_frequencySlider, SLOT(setValue(int)));
+
+    // Add standard buttons to layout
+    QDialogButtonBox *buttonBox = new QDialogButtonBox(this);
+    buttonBox->setStandardButtons(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
+    dialogLayout->addWidget(buttonBox);
+
+    // Connect standard buttons
+    CHECKED_CONNECT(buttonBox->button(QDialogButtonBox::Ok), SIGNAL(clicked()),
+                    this, SLOT(accept()));
+    CHECKED_CONNECT(buttonBox->button(QDialogButtonBox::Cancel), SIGNAL(clicked()),
+                    this, SLOT(reject()));
+
+    setLayout(dialogLayout);
+}
+
+ToneGeneratorDialog::~ToneGeneratorDialog()
+{
+
+}
+
+bool ToneGeneratorDialog::isFrequencySweepEnabled() const
+{
+    return m_toneGeneratorSweepCheckBox->isChecked();
+}
+
+qreal ToneGeneratorDialog::frequency() const
+{
+    return qreal(m_frequencySlider->value());
+}
+
+qreal ToneGeneratorDialog::amplitude() const
+{
+    return qreal(m_amplitudeSlider->value()) / 100.0;
+}
+
+void ToneGeneratorDialog::frequencySweepEnabled(bool enabled)
+{
+    m_frequencySweepEnabled = enabled;
+    m_toneGeneratorFrequencyControl->setEnabled(!enabled);
+}