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//=============================================================================
// Awl
// Audio Widget Library
// $Id:$
//
// Copyright (C) 1999-2011 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
// as published by the Free Software Foundation; version 2 of
// the License, or (at your option) any later version.
//
// 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//=============================================================================
#include <cmath>
#include "tempoedit.h"
#include <QApplication>
#include <QStyle>
namespace Awl {
//---------------------------------------------------------
// TempoEdit
//---------------------------------------------------------
TempoEdit::TempoEdit(QWidget* parent)
: QDoubleSpinBox(parent)
{
curVal = -1.0;
setSingleStep(1.0);
setRange(30.0, 600.0);
connect(this, SIGNAL(valueChanged(double)), SLOT(newValue(double)));
}
//---------------------------------------------------------
// sizeHint
//---------------------------------------------------------
QSize TempoEdit::sizeHint() const
{
QFontMetrics fm(font());
int fw = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
int h = fm.height() + fw * 2;
int w = 2 + fm.width(QString("000.00")) + fw * 4 + 30;
return QSize(w, h).expandedTo(QApplication::globalStrut());
}
//---------------------------------------------------------
// newValue
//---------------------------------------------------------
void TempoEdit::newValue(double val)
{
if (val != curVal) {
curVal = val;
emit tempoChanged(tempo());
}
}
//---------------------------------------------------------
// setTempo
//---------------------------------------------------------
void TempoEdit::setTempo(int val)
{
double d = 60000000.0/double(val);
if (d != curVal) {
curVal = d;
blockSignals(true);
setValue(d);
blockSignals(false);
}
}
//---------------------------------------------------------
// tempo
//---------------------------------------------------------
int TempoEdit::tempo() const
{
return lrint(60000000.0/value());
}
}
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