marginvaluewidget.cpp

/*
 *  This file is part of the KDE libraries
 *  Copyright (c) 2001 Michael Goffioul <tdeprint@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, TQWidget *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, TQ_SIGNAL(valueChanged(double)), TQ_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"