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/* $Id: offsetConstraint.cpp,v 1.7 2006-11-05 04:42:43 ganzhorn Exp $
* This file is part of lfhex.
* Copyright (C) 2006 Salem Ganzhorn <eyekode@yahoo.com>
*
* 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.
*
* 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 <QLabel>
#include <QSpinBox>
#include <QHBoxLayout>
#include <algorithm> // for min<>()
#include "local.h"
#include "offsetConstraint.hpp"
#include "box.hpp"
OffsetConstraint::OffsetConstraint( QWidget * parent )
: QGroupBox(parent)
{
QLayout* l = new QHBoxLayout(this);
this->setLayout(l);
hbox * h = new hbox(this);
l->addWidget(h);
new QLabel("X =",h);
stride = new QSpinBox(h);
stride->setRange(1,16);
stride->setValue(1);
connect(stride,SIGNAL(valueChanged(int)),
this,SLOT(setStride(int)));
h = new hbox(this);
l->addWidget(h);
new QLabel("Y =",h);
offset = new QSpinBox(h);
offset->setRange(1,16);
offset->setValue(1);
setSizePolicy(QSizePolicy(QSizePolicy::Expanding,QSizePolicy::Fixed));
}
// public interface
int OffsetConstraint::getStride(void) const
{
return stride->text().toInt();
}
int OffsetConstraint::getOffset(void) const
{
return offset->text().toInt();
}
off_t OffsetConstraint::next(off_t off) const
{
return( ((off-getOffset())/getStride()+1)*getStride()+getOffset() );
}
off_t OffsetConstraint::prev(off_t off) const
{
return( ((off-getOffset())/getStride() - 1)*getStride()+getOffset() );
}
// public slots
void OffsetConstraint::setOffset(int x)
{
offset->setValue( min(x,getStride()-1) );
}
void OffsetConstraint::setStride(int x)
{
// constrain x to (0,MAXINT)
if( x < 1 ) {
stride->setValue(1);
return;
}
// constrain offset to [0,x)
// setRange() does not seem to work as the documentation says, so
// we have to manually change the value
if( offset->text().toInt() >= x )
offset->setValue(x-1);
offset->setRange(0,x-1);
return;
}
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