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

**

** 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.

**

**

**

** $QT_END_LICENSE$

**

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

#include "progressbar.h"

#include "spectrum.h"

#include <QPainter>

ProgressBar::ProgressBar(QWidget *parent)

    :   QWidget(parent)

    ,   m_bufferDuration(0)

    ,   m_recordPosition(0)

    ,   m_playPosition(0)

    ,   m_windowPosition(0)

    ,   m_windowLength(0)

{

    setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);

    setMinimumHeight(30);

#ifdef SUPERIMPOSE_PROGRESS_ON_WAVEFORM

    setAutoFillBackground(false);

#endif

}

ProgressBar::~ProgressBar()

{

}

void ProgressBar::reset()

{

    m_bufferDuration = 0;

    m_recordPosition = 0;

    m_playPosition = 0;

    m_windowPosition = 0;

    m_windowLength = 0;

    update();

}

void ProgressBar::paintEvent(QPaintEvent * /*event*/)

{

    QPainter painter(this);

    QColor bufferColor(0, 0, 255);

    QColor windowColor(0, 255, 0);

#ifdef SUPERIMPOSE_PROGRESS_ON_WAVEFORM

    bufferColor.setAlphaF(0.5);

    windowColor.setAlphaF(0.5);

#else

    painter.fillRect(rect(), Qt::black);

#endif

    if (m_bufferDuration) {

        QRect bar = rect();

        const qreal play = qreal(m_playPosition) / m_bufferDuration;

        bar.setLeft(rect().left() + play * rect().width());

        const qreal record = qreal(m_recordPosition) / m_bufferDuration;

        bar.setRight(rect().left() + record * rect().width());

        painter.fillRect(bar, bufferColor);

        QRect window = rect();

        const qreal windowLeft = qreal(m_windowPosition) / m_bufferDuration;

        window.setLeft(rect().left() + windowLeft * rect().width());

        const qreal windowWidth = qreal(m_windowLength) / m_bufferDuration;

        window.setWidth(windowWidth * rect().width());

        painter.fillRect(window, windowColor);

    }

}

void ProgressBar::bufferDurationChanged(qint64 bufferSize)

{

    m_bufferDuration = bufferSize;

    m_recordPosition = 0;

    m_playPosition = 0;

    m_windowPosition = 0;

    m_windowLength = 0;

    repaint();

}

void ProgressBar::recordPositionChanged(qint64 recordPosition)

{

    Q_ASSERT(recordPosition >= 0);

    Q_ASSERT(recordPosition <= m_bufferDuration);

    m_recordPosition = recordPosition;

    repaint();

}

void ProgressBar::playPositionChanged(qint64 playPosition)

{

    Q_ASSERT(playPosition >= 0);

    Q_ASSERT(playPosition <= m_bufferDuration);

    m_playPosition = playPosition;

    repaint();

}

void ProgressBar::windowChanged(qint64 position, qint64 length)

{

    Q_ASSERT(position >= 0);

    Q_ASSERT(position <= m_bufferDuration);

    Q_ASSERT(position + length <= m_bufferDuration);

    m_windowPosition = position;

    m_windowLength = length;

    repaint();

}