55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
/*
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This file is part of EqualizerAPO, a system-wide equalizer.
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Copyright (C) 2015 Jonas Thedering
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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 as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <cmath>
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#include "ExponentialSpinBox.h"
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using namespace std;
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ExponentialSpinBox::ExponentialSpinBox(QWidget* parent)
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: QSpinBox(parent)
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{
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}
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void ExponentialSpinBox::stepBy(int steps)
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{
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qint64 v = value();
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if (steps > 0)
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{
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v <<= steps;
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if (v > maximum())
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v = maximum();
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}
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else
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{
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v >>= -steps;
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if (v < minimum())
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v = minimum();
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}
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setValue((int)v);
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}
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int ExponentialSpinBox::valueFromText(const QString& text) const
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{
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int value = QSpinBox::valueFromText(text);
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value = exp2(round(log2(value)));
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return value;
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}
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