kgamma/kcmkgamma/displaynumber.cpp

   1 /***************************************************************************
   2                           displaynumber.cpp  -  description
   3                              -------------------
   4     begin                : Sun Feb 23 2003
   5     copyright            : (C) 2003 by Michael v.Ostheim
   6     email                : ostheimm@users.berlios.de
   7  ***************************************************************************/
   8
   9 /***************************************************************************
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  ***************************************************************************/
  17
  18 #include <qstring.h>
  19 #include <qfontmetrics.h>
  20 //Added by qt3to4:
  21 #include <QLabel>
  22 #include <QFrame>
  23
  24 #include "displaynumber.h"
  25
  26 DisplayNumber::DisplayNumber(QWidget *parent, int digits, int prec)
  27   : QLabel(parent) {
  28
  29   setPrecision(prec);
  30   setWidth(digits);
  31
  32   setFrameStyle(QFrame::Panel | QFrame::Sunken);
  33   setBackgroundRole(QPalette::Base);
  34   setAlignment(Qt::AlignCenter);
  35   setFocusPolicy(Qt::NoFocus);
  36 }
  37
  38 DisplayNumber::~DisplayNumber(){
  39 }
  40
  41 void DisplayNumber::setFont( const QFont & f ) {
  42   QLabel::setFont(f);
  43   setWidth(dg);
  44 }
  45
  46 void DisplayNumber::setWidth(int digits) {
  47   QFontMetrics fm(font());
  48   QString s("0123456789.+-");
  49   int width = 0, charWidth=0;
  50
  51   for (int i = 0; i < 11; i++, width = fm.width(s[i]))
  52     charWidth = (width > charWidth) ? width : charWidth;
  53
  54   dg = digits;
  55   setMinimumWidth( dg * charWidth + charWidth/2 );
  56 }
  57
  58 void DisplayNumber::setNum(double num) {
  59   QString text;
  60   setText(text.setNum(num, 'f', precision));
  61 }
  62
  63
  64 #include "displaynumber.moc"