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-rw-r--r--src/offsetConstraint.cpp98
1 files changed, 98 insertions, 0 deletions
diff --git a/src/offsetConstraint.cpp b/src/offsetConstraint.cpp
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+++ b/src/offsetConstraint.cpp
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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;
+}
+