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    41 

    42 #include "progressbar.h"

    43 #include "spectrum.h"

    44 #include <QPainter>

    45 

    46 ProgressBar::ProgressBar(QWidget *parent)

    47     :   QWidget(parent)

    48     ,   m_bufferDuration(0)

    49     ,   m_recordPosition(0)

    50     ,   m_playPosition(0)

    51     ,   m_windowPosition(0)

    52     ,   m_windowLength(0)

    53 {

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

    55     setMinimumHeight(30);

    56 #ifdef SUPERIMPOSE_PROGRESS_ON_WAVEFORM

    57     setAutoFillBackground(false);

    58 #endif

    59 }

    60 

    61 ProgressBar::~ProgressBar()

    62 {

    63 

    64 }

    65 

    66 void ProgressBar::reset()

    67 {

    68     m_bufferDuration = 0;

    69     m_recordPosition = 0;

    70     m_playPosition = 0;

    71     m_windowPosition = 0;

    72     m_windowLength = 0;

    73     update();

    74 }

    75 

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

    77 {

    78     QPainter painter(this);

    79 

    80     QColor bufferColor(0, 0, 255);

    81     QColor windowColor(0, 255, 0);

    82 

    83 #ifdef SUPERIMPOSE_PROGRESS_ON_WAVEFORM

    84     bufferColor.setAlphaF(0.5);

    85     windowColor.setAlphaF(0.5);

    86 #else

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

    88 #endif

    89 

    90     if (m_bufferDuration) {

    91         QRect bar = rect();

    92         const qreal play = qreal(m_playPosition) / m_bufferDuration;

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

    94         const qreal record = qreal(m_recordPosition) / m_bufferDuration;

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

    96         painter.fillRect(bar, bufferColor);

    97 

    98         QRect window = rect();

    99         const qreal windowLeft = qreal(m_windowPosition) / m_bufferDuration;

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

   101         const qreal windowWidth = qreal(m_windowLength) / m_bufferDuration;

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

   103         painter.fillRect(window, windowColor);

   104     }

   105 }

   106 

   107 void ProgressBar::bufferDurationChanged(qint64 bufferSize)

   108 {

   109     m_bufferDuration = bufferSize;

   110     m_recordPosition = 0;

   111     m_playPosition = 0;

   112     m_windowPosition = 0;

   113     m_windowLength = 0;

   114     repaint();

   115 }

   116 

   117 void ProgressBar::recordPositionChanged(qint64 recordPosition)

   118 {

   119     Q_ASSERT(recordPosition >= 0);

   120     Q_ASSERT(recordPosition <= m_bufferDuration);

   121     m_recordPosition = recordPosition;

   122     repaint();

   123 }

   124 

   125 void ProgressBar::playPositionChanged(qint64 playPosition)

   126 {

   127     Q_ASSERT(playPosition >= 0);

   128     Q_ASSERT(playPosition <= m_bufferDuration);

   129     m_playPosition = playPosition;

   130     repaint();

   131 }

   132 

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

   134 {

   135     Q_ASSERT(position >= 0);

   136     Q_ASSERT(position <= m_bufferDuration);

   137     Q_ASSERT(position + length <= m_bufferDuration);

   138     m_windowPosition = position;

   139     m_windowLength = length;

   140     repaint();

   141 }