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/***************************************************************************
BitrateSpinBox.cpp - spinbox for selecting a bitrate for MP3 or Ogg
-------------------
begin : Thu Oct 24 2002
copyright : (C) 2002 by Thomas Eschenbacher
email : Thomas Eschenbacher <thomas.eschenbacher@gmx.de>
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "config.h"
#include <QtGlobal>
#include "libkwave/Utils.h"
#include "BitrateSpinBox.h"
/***************************************************************************/
Kwave::BitrateSpinBox::BitrateSpinBox(QWidget *parent)
:QSpinBox(parent), m_rates()
{
m_rates.append(0); // don't let it stay empty, that makes life easier
connect(this, SIGNAL(valueChanged(int)),
this, SLOT(snapIn(int)));
}
/***************************************************************************/
Kwave::BitrateSpinBox::~BitrateSpinBox()
{
}
/***************************************************************************/
void Kwave::BitrateSpinBox::snapIn(int value)
{
int index = nearestIndex(value);
int old_index = index;
int old_value = m_rates[index];
if (value == old_value) return;
if ((value > old_value) && (index < Kwave::toInt(m_rates.size()) - 1))
index++;
if ((value < old_value) && (index > 0))
index--;
if (index != old_index) {
int v = m_rates[index];
setValue(v);
emit snappedIn(v);
}
}
/***************************************************************************/
void Kwave::BitrateSpinBox::allowRates(const QList<int> &list)
{
int old_value = value();
m_rates = list;
if (m_rates.isEmpty()) m_rates.append(0);
// set new ranges
setMinimum(m_rates.first());
setMaximum(m_rates.last());
setValue(old_value);
}
//***************************************************************************
int Kwave::BitrateSpinBox::nearestIndex(int rate)
{
// find the nearest value
int nearest = 0;
foreach(int i, m_rates)
if (qAbs(i - rate) < qAbs(nearest - rate)) nearest = i;
// find the index
qsizetype index = m_rates.contains(nearest) ? m_rates.indexOf(nearest) : 0;
// limit the index into a reasonable range
return static_cast<int>(qBound(0, index, m_rates.size() - 1));
}
//***************************************************************************
//***************************************************************************
#include "moc_BitrateSpinBox.cpp"
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