# kdeprint Library API Documentation

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# marginvaluewidget.cpp

    00001 /*
    00002  *  This file is part of the KDE libraries
    00003  *  Copyright (c) 2001 Michael Goffioul <kdeprint@swing.be>
    00004  *
    00005  *  This library is free software; you can redistribute it and/or
    00006  *  modify it under the terms of the GNU Library General Public
    00007  *  License version 2 as published by the Free Software Foundation.
    00008  *
    00009  *  This library is distributed in the hope that it will be useful,
    00010  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
    00011  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00012  *  Library General Public License for more details.
    00013  *
    00014  *  You should have received a copy of the GNU Library General Public License
    00015  *  along with this library; see the file COPYING.LIB.  If not, write to
    00016  *  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00017  *  Boston, MA 02111-1307, USA.
    00018  **/
    00019
    00020 #include "marginvaluewidget.h"
    00021
    00022 #include <math.h>
    00023
    00024 MarginValueWidget::MarginValueWidget(KNumInput *below, double value, QWidget *parent, const char *name)
    00025 : KDoubleNumInput(below, value, parent, name)
    00026 {
    00027     m_mode = Pixels;
    00028     m_block = false;
    00029     setPrecision(0);
    00030     m_dpi = 72.0;
    00031     m_margin = ( float )value;
    00032     setMode(m_mode);
    00033     setRange(0, 999, 1, false);
    00034     connect(this, SIGNAL(valueChanged(double)), SLOT(slotValueChanged(double)));
    00035 }
    00036
    00037 float MarginValueWidget::margin()
    00038 {
    00039     // Force synchronization
    00040     m_margin = toPixel(value(), m_mode);
    00041     return m_margin;
    00042 }
    00043
    00044 void MarginValueWidget::setMargin(float m)
    00045 {
    00046     m_margin = m;
    00047     double  v = toValue(m, m_mode);
    00048     m_block = true;
    00049     setValue(v);
    00050     m_block = false;
    00051     emit marginChanged( m_margin );
    00052 }
    00053
    00054 float MarginValueWidget::toPixel(double value, int mode)
    00055 {
    00056     switch (mode)
    00057     {
    00058         default:
    00059         case Pixels: return (float)value;
    00060         case IN: return (float)(value * m_dpi);
    00061         case CM: return (float)(value * m_dpi / 2.54);
    00062         case MM: return (float)(value * m_dpi / 25.4);
    00063     }
    00064 }
    00065
    00066 double MarginValueWidget::toValue(float pix, int mode)
    00067 {
    00068     switch (mode)
    00069     {
    00070         default:
    00071         case Pixels:
    00072             return (double)pix;
    00073         case IN:
    00074             return (double(pix) / m_dpi);
    00075         case CM:
    00076             return (double(pix) * 2.54 / m_dpi);
    00077         case MM:
    00078             return ( double( pix ) * 25.4 / m_dpi );
    00079     }
    00080 }
    00081
    00082 void MarginValueWidget::slotValueChanged(double v)
    00083 {
    00084     if (!m_block)
    00085     {
    00086         m_margin = toPixel( v, m_mode );
    00087         emit marginChanged(margin());
    00088     }
    00089 }
    00090
    00091 void MarginValueWidget::setMode(int m)
    00092 {
    00093     if (m != m_mode)
    00094     {
    00095         m_block = true;
    00096         m_mode = m;
    00097         double v = toValue(m_margin, m);
    00098         if (m == Pixels)
    00099         {
    00100             setPrecision(0);
    00101             setRange(0.0, 999.0, 1.0, false);
    00102         }
    00103         else
    00104         {
    00105             setPrecision(3);
    00106             setRange(0.0, 999.0, 0.01, false);
    00107         }
    00108         setValue(v);
    00109         m_block = false;
    00110     }
    00111 }
    00112
    00113 void MarginValueWidget::setResolution(int dpi)
    00114 {
    00115     m_dpi = dpi;
    00116     m_block = true;
    00117     setMargin(m_margin);
    00118     m_block = false;
    00119 }
    00120
    00121 int MarginValueWidget::resolution() const
    00122 {
    00123     return (int)(m_dpi+0.5);
    00124 }
    00125
    00126 #include "marginvaluewidget.moc"

This file is part of the documentation for kdeprint Library Version 3.4.1.
Documentation copyright © 1996-2004 the KDE developers.
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