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