marginvaluewidget.cpp
/*
* This file is part of the KDE libraries
* Copyright (c) 2001 Michael Goffioul <kdeprint@swing.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License version 2 as published by the Free Software Foundation.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
**/
#include "marginvaluewidget.h"
#include <math.h>
MarginValueWidget::MarginValueWidget(KNumInput *below, double value, QWidget *parent, const char *name)
: KDoubleNumInput(below, value, parent, name)
{
m_mode = Pixels;
m_block = false;
setPrecision(0);
m_dpi = 72.0;
m_margin = ( float )value;
setMode(m_mode);
setRange(0, 999, 1, false);
connect(this, SIGNAL(valueChanged(double)), SLOT(slotValueChanged(double)));
}
float MarginValueWidget::margin()
{
// Force synchronization
m_margin = toPixel(value(), m_mode);
return m_margin;
}
void MarginValueWidget::setMargin(float m)
{
m_margin = m;
double v = toValue(m, m_mode);
m_block = true;
setValue(v);
m_block = false;
emit marginChanged( m_margin );
}
float MarginValueWidget::toPixel(double value, int mode)
{
switch (mode)
{
default:
case Pixels: return (float)value;
case IN: return (float)(value * m_dpi);
case CM: return (float)(value * m_dpi / 2.54);
case MM: return (float)(value * m_dpi / 25.4);
}
}
double MarginValueWidget::toValue(float pix, int mode)
{
switch (mode)
{
default:
case Pixels:
return (double)pix;
case IN:
return (double(pix) / m_dpi);
case CM:
return (double(pix) * 2.54 / m_dpi);
case MM:
return ( double( pix ) * 25.4 / m_dpi );
}
}
void MarginValueWidget::slotValueChanged(double v)
{
if (!m_block)
{
m_margin = toPixel( v, m_mode );
emit marginChanged(margin());
}
}
void MarginValueWidget::setMode(int m)
{
if (m != m_mode)
{
m_block = true;
m_mode = m;
double v = toValue(m_margin, m);
if (m == Pixels)
{
setPrecision(0);
setRange(0.0, 999.0, 1.0, false);
}
else
{
setPrecision(3);
setRange(0.0, 999.0, 0.01, false);
}
setValue(v);
m_block = false;
}
}
void MarginValueWidget::setResolution(int dpi)
{
m_dpi = dpi;
m_block = true;
setMargin(m_margin);
m_block = false;
}
int MarginValueWidget::resolution() const
{
return (int)(m_dpi+0.5);
}
#include "marginvaluewidget.moc"

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