kalzium/src/detailedgraphicaloverview.cpp

   1 /***************************************************************************
   2
   3 copyright            : (C) 2004, 2005, 2006, 2007 by Carsten Niehaus
   4 email                : cniehaus@kde.org
   5  ***************************************************************************/
   6
   7 /***************************************************************************
   8  *                                                                         *
   9  *   This program is free software; you can redistribute it and/or modify  *
  10  *   it under the terms of the GNU General Public License as published by  *
  11  *   the Free Software Foundation; either version 2 of the License, or     *
  12  *   (at your option) any later version.                                   *
  13  *                                                                         *
  14  ***************************************************************************/
  15
  16 #include "detailedgraphicaloverview.h"
  17 #include "kalziumdataobject.h"
  18 #include "kalziumutils.h"
  19
  20 //KDE-Includes
  21 #include <kdebug.h>
  22 #include <klocale.h>
  23 #include <kglobalsettings.h>
  24 #include <kglobal.h>
  25 #include <kstandarddirs.h>
  26
  27 //QT-Includes
  28 #include <QFile>
  29 #include <QPainter>
  30 #include <QSvgRenderer>
  31 #include <QRect>
  32
  33 #include <element.h>
  34 #include "prefs.h"
  35
  36 DetailedGraphicalOverview::DetailedGraphicalOverview( QWidget *parent )
  37 : QWidget( parent )
  38 {
  39         setAttribute( Qt::WA_NoBackground, true );
  40
  41         m_element = 0;
  42         setMinimumSize( 300, 200 );
  43
  44         // last operation: setting the background color and scheduling an update()
  45         setBackgroundColor( QColor() );
  46 }
  47
  48 void DetailedGraphicalOverview::setElement( int el )
  49 {
  50         m_element = KalziumDataObject::instance()->element( el );
  51         update();
  52 }
  53
  54 void DetailedGraphicalOverview::setBackgroundColor( const QColor& bgColor )
  55 {
  56         m_backgroundColor = bgColor.isValid() ? bgColor : Qt::green;
  57
  58         //this check is needed because a QBrush( QPixmap() ) constructs
  59         //with a black brush. But black is a really bad color here ...
  60         if ( bgColor == QColor( 0, 0, 0 ) )
  61                 m_backgroundColor = Qt::white;
  62
  63         update();
  64 }
  65
  66 void DetailedGraphicalOverview::paintEvent( QPaintEvent* )
  67 {
  68     int h = height();
  69     int w = width();
  70
  71     QPixmap pm( w, h );
  72
  73     QPainter p;
  74     p.begin( &pm );
  75
  76     p.setBrush(Qt::SolidPattern);
  77
  78     if ( !m_element )
  79     {
  80         pm.fill( palette().background().color() );
  81         p.drawText( 0, 0, w, h, Qt::AlignCenter | Qt::TextWordWrap, i18n( "No element selected" ) );
  82     } else if ( Prefs::colorschemebox() == 2) { //The iconic view is the 3rd view (0,1,2,...)
  83         pm.fill( palette().background().color() );
  84
  85         QString pathname = KGlobal::dirs()->findResourceDir( "appdata", "data/iconsets/" ) + "data/iconsets/";
  86
  87         int enumii = m_element->dataAsVariant( ChemicalDataObject::atomicNumber ).toInt();
  88
  89         QString filename = pathname + "school" + '/' + QString::number( enumii )  + ".svg";
  90
  91         QSvgRenderer svgrenderer;
  92         if ( QFile::exists(filename) && svgrenderer.load(filename) ) {
  93             QSize size = svgrenderer.defaultSize();
  94             size.scale( w, h, Qt::KeepAspectRatio );
  95
  96             QRect bounds( QPoint( 0, 0 ), size );
  97             bounds.moveCenter( QPoint( w/2, h/2 ) );
  98             svgrenderer.render( &p, bounds );
  99         } else {
 100             p.drawText( 0, 0, w, h, Qt::AlignCenter | Qt::TextWordWrap, i18n( "No graphic found" ) );
 101         }
 102     } else
 103     {
 104         h_t = 20; //height of the texts
 105
 106         x1 =  0;
 107         y1 =  0;
 108
 109         x2 = w;
 110         y2 = h;
 111
 112         p.setBrush( m_backgroundColor );
 113         p.drawRect( x1, y1, x2 - 1, y2 - 1 );
 114
 115         p.setBrush( Qt::black );
 116         p.setBrush(Qt::NoBrush);
 117
 118         QFont fA = KGlobalSettings::generalFont();
 119         QFont fB = KGlobalSettings::generalFont();
 120         QFont fC = KGlobalSettings::generalFont();
 121
 122         fA.setPointSize( fA.pointSize() + 20 ); //Huge font
 123         fA.setBold( true );
 124         fB.setPointSize( fB.pointSize() + 6 ); //Big font
 125         fC.setPointSize( fC.pointSize() + 4 ); //Big font
 126         fC.setBold( true );
 127         QFontMetrics fmA = QFontMetrics( fA );
 128         QFontMetrics fmB = QFontMetrics( fB );
 129
 130         //coordinates for element symbol: near the center
 131         int xA = 4 * w / 10;
 132         int yA = h / 2;
 133
 134         //coordinates for the atomic number: offset from element symbol to the upper left
 135         int xB = xA - fmB.width( m_element->dataAsString( ChemicalDataObject::atomicNumber ) );
 136         int yB = yA + fmB.height()/2;
 137
 138         //Element Symbol
 139         p.setFont( fA );
 140         p.drawText( xA, yA , m_element->dataAsString( ChemicalDataObject::symbol) );
 141
 142         //Atomic number
 143         p.setFont( fB );
 144         p.drawText( xB, yB, m_element->dataAsString( ChemicalDataObject::atomicNumber ) );
 145
 146         QRect rect( 0, 20, w/2, h );
 147
 148         p.setFont( fC );
 149
 150         int size = KalziumUtils::maxSize(m_element->dataAsString( ChemicalDataObject::name), rect , fC, &p);
 151
 152
 153         //Name and other data
 154         fC.setPointSize( size );
 155         p.setFont( fC );
 156
 157         //Name
 158         p.drawText( 1, 0, w/2, h, Qt::AlignLeft, m_element->dataAsString( ChemicalDataObject::name) );
 159
 160         //Oxidationstates
 161         p.setFont( fC );
 162
 163         //Mass
 164         QString massString = i18nc( "For example '1.0079u', the mass of an element in units", "%1 u", m_element->dataAsString( ChemicalDataObject::mass ) );
 165         int size3 = KalziumUtils::maxSize( massString, rect , fC, &p);
 166         fC.setPointSize( size3 );
 167         p.setFont( fC );
 168         int offset = KalziumUtils::StringHeight( massString, fC, &p );
 169         p.drawText( w/2,
 170                 h-offset,
 171                 w/2,
 172                 offset,
 173                 Qt::AlignRight,
 174                 massString
 175                 );
 176     }
 177
 178     p.end();
 179
 180     p.begin( this );
 181     p.drawPixmap( 0, 0, pm );
 182     p.end();
 183 }
 184
 185 #include "detailedgraphicaloverview.moc"