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//=============================================================================
// Awl
// Audio Widget Library
// $Id:$
//
// Copyright (C) 2009 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 "denomspinbox.h"
namespace Awl {
//---------------------------------------------------------
// DenominatorSpinBox
//---------------------------------------------------------
DenominatorSpinBox::DenominatorSpinBox(QWidget* parent)
: QSpinBox(parent)
{
setValue(4);
setRange(1, 256);
}
//---------------------------------------------------------
// stepBy
//---------------------------------------------------------
void DenominatorSpinBox::stepBy(int steps)
{
int v = value();
if (steps < 0)
v = v / 2;
else
v = v * 2;
if (v < 1)
v = 1;
if (v > 256)
v = 256;
setValue(v);
}
//---------------------------------------------------------
// validate
//---------------------------------------------------------
QValidator::State DenominatorSpinBox::validate(QString& input, int& pos) const
{
if (input.isEmpty())
return QValidator::Intermediate;
bool ok;
int val = input.toInt(&ok);
if (!ok)
return QValidator::Invalid;
if (val & (val - 1) != 0)
return QValidator::Intermediate;
return QValidator::Acceptable;
}
//---------------------------------------------------------
// fixup
//---------------------------------------------------------
void DenominatorSpinBox::fixup(QString& input) const
{
bool ok;
int val = input.toInt(&ok);
if (!ok) {
input = QString("4");
return;
}
if (val == 1)
return;
if (val < 1 || val > 256) {
input = QString("4");
return;
}
double v = round(log2(double(val)));
val = int(exp2(v));
input = QString("%1").arg(val);
}
}
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