kalzium/src/plotwidget.cpp

   1 /***************************************************************************
   2
   3                           plotwidget.cpp  -  description
   4                              -------------------
   5     copyright            : (C) 2004 by Carsten Niehaus
   6     email                : cniehaus@kde.org
   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 "plotwidget.h"
  19
  20 //KDE-Includes
  21 #include <kdebug.h>
  22 #include <kimageio.h>
  23
  24 //QT-Includes
  25 #include <qpainter.h>
  26
  27 PlotWidget::PlotWidget( double x1,
  28                 double x2,
  29                 double y1,
  30                 double y2,
  31                 QWidget *parent,
  32                 const char* name)
  33                 : KPlotWidget( x1, x2, y1, y2, parent, name )
  34 {
  35         m_connectPoints = false;
  36 }
  37
  38 void PlotWidget::drawObjects( QPainter *p )
  39 {
  40         for ( KPlotObject *po = ObjectList.first(); po; po = ObjectList.next() ) {
  41
  42                 if ( po->points()->count() ) {
  43                         //draw the plot object
  44                         p->setPen( QColor( po->color() ) );
  45
  46                         switch ( po->type() ) {
  47                                 case KPlotObject::POINTS :
  48                                 {
  49                                         p->setBrush( QColor( po->color() ) );
  50
  51                                         for ( DPoint *dp = po->points()->first(); dp; dp = po->points()->next() )
  52                                         {
  53                                                 QPoint q = dp->qpoint( PixRect, DataRect );
  54                                                 int x1 = q.x() - po->size()/2;
  55                                                 int y1 = q.y() - po->size()/2;
  56
  57                                                 switch( po->param() )
  58                                                 {
  59                                                         case KPlotObject::CIRCLE :
  60                                                                 p->drawEllipse( x1, y1, po->size(), po->size() );
  61                                                                 break;
  62                                                         case KPlotObject::SQUARE : p->drawRect( x1, y1, po->size(), po->size() ); break;
  63                                                         case KPlotObject::LETTER : p->drawText( q, po->name().left(1) ); break;
  64                                                         default: p->drawPoint( q );
  65                                                 }
  66                                         }
  67                                         if (m_connectPoints)
  68                                         {
  69                                                 int     p1x, p1y, //the first point
  70                                                         p2x, p2y; //the second point
  71
  72                                                 DPoint *dp = po->points()->first();
  73
  74                                                 while ( dp )
  75                                                 {
  76                                                         QPoint point = dp->qpoint( PixRect, DataRect );
  77                                                         p1x = point.x();
  78                                                         p1y = point.y();
  79
  80                                                         p->drawLine(p1x,p1y,p2x,p2y);
  81
  82                                                         p2x = p1x;
  83                                                         p2y = p1y;
  84
  85                                                         dp = po->points()->next();
  86                                                 }
  87                                         }
  88                                         kdDebug() << "nach der for-Schleife" << endl;
  89
  90                                         p->setBrush( Qt::NoBrush );
  91                                         break;
  92                                 }
  93
  94                                 case KPlotObject::CURVE :
  95                                 {
  96                                         p->setPen( QPen( QColor( po->color() ), po->size(), (QPen::PenStyle)po->param() ) );
  97                                         DPoint *dp = po->points()->first();
  98                                         p->moveTo( dp->qpoint( PixRect, DataRect ) );
  99                                         for ( dp = po->points()->next(); dp; dp = po->points()->next() )
 100                                                 p->lineTo( dp->qpoint( PixRect, DataRect ) );
 101                                         break;
 102                                 }
 103
 104                                 case KPlotObject::LABEL : //draw label centered at point in x, and slightly below point in y.
 105                                 {
 106                                         QPoint q = po->points()->first()->qpoint( PixRect, DataRect );
 107                                         p->drawText( q.x()-20, q.y()+6, 40, 10, Qt::AlignCenter | Qt::DontClip, po->name() );
 108                                         break;
 109                                 }
 110
 111                                 case KPlotObject::POLYGON :
 112                                 {
 113                                         p->setPen( QPen( QColor( po->color() ), po->size(), (QPen::PenStyle)po->param() ) );
 114                                         p->setBrush( po->color() );
 115
 116                                         QPointArray a( po->count() );
 117
 118                                         unsigned int i=0;
 119                                         for ( DPoint *dp = po->points()->first(); dp; dp = po->points()->next() )
 120                                                 a.setPoint( i++, dp->qpoint( PixRect, DataRect ) );
 121
 122                                         p->drawPolygon( a );
 123                                         break;
 124                                 }
 125
 126                                 case KPlotObject::UNKNOWN_TYPE : break;
 127                         }
 128                 }
 129         }
 130 }
 131
 132 #include "plotwidget.moc"