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