lib Library API Documentation

fontstyle.h

00001 /* This file is part of the KDE project
00002    Copyright (C) 2003 Ulrich Kuettler <ulrich.kuettler@gmx.de>
00003 
00004    This library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Library General Public
00006    License as published by the Free Software Foundation; either
00007    version 2 of the License, or (at your option) any later version.
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 #ifndef FONTSTYLE_H
00021 #define FONTSTYLE_H
00022 
00023 #include <qstring.h>
00024 #include <qfont.h>
00025 
00026 #include "contextstyle.h"
00027 #include "kformuladefs.h"
00028 #include "symboltable.h"
00029 
00030 
00031 KFORMULA_NAMESPACE_BEGIN
00032 
00033 class AlphaTable;
00034 class Artwork;
00035 class ContextStyle;
00036 class SymbolTable;
00037 
00038 
00042 class FontStyle {
00043 public:
00044 
00045     virtual ~FontStyle() {}
00046 
00048     virtual bool init( ContextStyle* context ) = 0;
00049 
00051     virtual const SymbolTable* symbolTable() const { return &m_symbolTable; }
00052     virtual SymbolTable* symbolTable() { return &m_symbolTable; }
00053 
00055     virtual const AlphaTable* alphaTable() const { return 0; };
00056 
00057     virtual Artwork* createArtwork(SymbolType type = EmptyBracket) const = 0;
00058 
00059 protected:
00060 
00061     // This is going to disappear in favour of a real macro facility some day.
00062     void fillNameTable( SymbolTable::NameTable& names );
00063 
00064 private:
00065 
00066     SymbolTable m_symbolTable;
00067 };
00068 
00069 
00073 class AlphaTableEntry {
00074 public:
00075 
00076     AlphaTableEntry() : pos( -1 ) {}
00077 
00078     bool valid() const { return pos > -1; }
00079 
00080     QFont font;
00081     short pos;
00082 };
00083 
00084 
00088 class AlphaTable {
00089 public:
00090 
00091     virtual ~AlphaTable() {}
00092     virtual AlphaTableEntry entry( short pos, CharFamily family, CharStyle style ) const = 0;
00093 };
00094 
00095 
00096 const QChar spaceChar = 0x0020;
00097 const QChar leftParenthesisChar = 0x0028;
00098 const QChar rightParenthesisChar = 0x0029;
00099 const QChar leftSquareBracketChar = 0x005B;
00100 const QChar rightSquareBracketChar = 0x005D;
00101 const QChar leftCurlyBracketChar = 0x007B;
00102 const QChar verticalLineChar = 0x007C;
00103 const QChar rightCurlyBracketChar = 0x007D;
00104 const QChar leftAngleBracketChar = 0x2329;
00105 const QChar rightAngleBracketChar = 0x232A;
00106 const QChar slashChar = 0x002F;
00107 const QChar backSlashChar = 0x005C;
00108 const QChar integralChar = 0x222B;
00109 const QChar summationChar = 0x2211;
00110 const QChar productChar = 0x220F;
00111 
00112 extern const QChar leftRoundBracket[];
00113 extern const QChar leftSquareBracket[];
00114 extern const QChar leftCurlyBracket[];
00115 
00116 extern const QChar leftLineBracket[];
00117 extern const QChar rightLineBracket[];
00118 
00119 extern const QChar rightRoundBracket[];
00120 extern const QChar rightSquareBracket[];
00121 extern const QChar rightCurlyBracket[];
00122 
00123 /*
00124  * A piece of art that may be used by any element.
00125  */
00126 class Artwork {
00127 public:
00128 
00129     Artwork(SymbolType type = EmptyBracket);
00130     virtual ~Artwork() {}
00131 
00132     virtual void calcSizes( const ContextStyle& style,
00133                             ContextStyle::TextStyle tstyle,
00134                             luPt parentSize ) = 0;
00135     virtual void calcSizes( const ContextStyle& style,
00136                             ContextStyle::TextStyle tstyle );
00137 
00138     virtual void draw( QPainter& painter, const LuPixelRect& r,
00139                        const ContextStyle& style,
00140                        ContextStyle::TextStyle tstyle,
00141                        luPt parentSize, const LuPixelPoint& origin ) = 0;
00142     virtual void draw( QPainter& painter, const LuPixelRect& r,
00143                        const ContextStyle& style,
00144                        ContextStyle::TextStyle tstyle,
00145                        const LuPixelPoint& parentOrigin );
00146 
00147     luPixel getWidth() const { return size.width(); }
00148     luPixel getHeight() const { return size.height(); }
00149 
00150     void setWidth( luPixel width ) { size.setWidth(width); }
00151     void setHeight( luPixel height ) { size.setHeight(height); }
00152 
00153     luPixel getBaseline() const { return baseline; }
00154     void setBaseline( luPixel line ) { baseline = line; }
00155 
00156     luPixel getX() const { return point.x(); }
00157     luPixel getY() const { return point.y(); }
00158 
00159     void setX( luPixel x ) { point.setX( x ); }
00160     void setY( luPixel y ) { point.setY( y ); }
00161 
00162     SymbolType getType() const { return type; }
00163     void setType(SymbolType t) { type = t; }
00164 
00165     virtual bool isNormalChar() const { return getBaseline() != -1; }
00166 
00167     virtual double slant() const { return 0; }
00168 
00169 protected:
00170 
00171     void calcCharSize( const ContextStyle& style, luPt height, QChar ch );
00172     void drawCharacter( QPainter& painter, const ContextStyle& style,
00173                         luPixel x, luPixel y, luPt height, QChar ch );
00174 
00175     void calcCharSize( const ContextStyle& style, QFont f,
00176                        luPt height, uchar c );
00177     void drawCharacter( QPainter& painter, const ContextStyle& style,
00178                         QFont f,
00179                         luPixel x, luPixel y, luPt height, uchar c );
00180 
00181     void calcRoundBracket( const ContextStyle& style, const QChar chars[], luPt height, luPt charHeight );
00182     void calcCurlyBracket( const ContextStyle& style, const QChar chars[], luPt height, luPt charHeight );
00183 
00184     void drawBigRoundBracket( QPainter& p, const ContextStyle& style, const QChar chars[], luPixel x, luPixel y, luPt charHeight );
00185     void drawBigCurlyBracket( QPainter& p, const ContextStyle& style, const QChar chars[], luPixel x, luPixel y, luPt charHeight );
00186 
00187 private:
00188 
00189     LuPixelSize size;
00190     LuPixelPoint point;
00191 
00195     luPixel baseline;
00196 
00197     SymbolType type;
00198 };
00199 
00200 
00201 KFORMULA_NAMESPACE_END
00202 
00203 #endif
KDE Logo
This file is part of the documentation for lib Library Version 1.3.5.
Documentation copyright © 1996-2004 the KDE developers.
Generated on Wed Nov 17 13:19:21 2004 by doxygen 1.3.5 written by Dimitri van Heesch, © 1997-2003