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//=============================================================================
// Awl
// Audio Widget Library
// $Id:$
//
// Copyright (C) 2002-2006 by Werner Schweer and others
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================
#include "fastlog.h"
#include "volslider.h"
namespace Awl {
//---------------------------------------------------------
// VolSlider
//---------------------------------------------------------
VolSlider::VolSlider(QWidget* parent)
: Slider(parent)
{
setLog(true);
// setRange(-60.0f, 10.0f);
setRange(-60.0f, 20.0f);
setScaleWidth(7);
setLineStep(.8f);
setPageStep(3.0f);
setDclickValue1(_minValue);
setDclickValue2(0.0);
}
//---------------------------------------------------------
// setValue
//---------------------------------------------------------
void VolSlider::setValue(double val)
{
if (_log) {
if (val == 0.0f)
_value = _minValue;
else {
_value = fast_log10(val) * 20.0f;
if (_value < _minValue)
_value = _minValue;
}
}
else
_value = val;
update();
}
//---------------------------------------------------------
// value
//---------------------------------------------------------
double VolSlider::value() const
{
double val = _log ? (_value <= _minValue) ? 0.0f : pow(10.0, _value*0.05f)
: _value;
return val;
}
}
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