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FXRotatableFont.h

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00001 /********************************************************************************
00002 *                                                                               *
00003 *               F o n t    r o t a t i o n    o b j e c t                       *
00004 *                                                                               *
00005 *********************************************************************************
00006 * Copyright (C) 2002 by Richard L. Herbst.          All Rights Reserved.        *
00007 *********************************************************************************
00008 * This program is free software; you can redistribute it and/or                 *
00009 * modify it under the terms of the GNU Lesser General Public                    *
00010 * License as published by the Free Software Foundation; either                  *
00011 * version 2.1 of the License, or (at your option) any later version.            *
00012 *                                                                               *
00013 * This library is distributed in the hope that it will be useful,               *
00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of                *
00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU             *
00016 * Lesser General Public License for more details.                               *
00017 *                                                                               *
00018 * You should have received a copy of the GNU Lesser General Public              *
00019 * License along with this library; if not, write to the Free Software           *
00020 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.    *
00021 ********************************************************************************/
00022 #ifndef FXROTATABLEFONT_H
00023 #define FXROTATABLEFONT_H
00024 
00025 #ifndef FXFONT_H
00026 #include <fox/FXFont.h>
00027 using namespace FX;
00028 #endif
00029 namespace FXEX {
00030 class FXRotatableFont;
00031 
00032 /// Font metrics object
00033 class FXAPI FXFontMatrix {
00034   friend class FXRotatableFont;
00035 
00036   protected:
00037     FXfloat a, b, c, d;  // font properties
00038 
00039   protected:
00040     /// return string'ised version of sign
00041     FXString getSign(FXfloat x);
00042 
00043     /// return string'ised name of font
00044     FXString getXLFDStr(void);
00045 
00046   public:
00047     /// build font metrics
00048     FXFontMatrix(FXfloat FontSz=1.0);
00049 
00050     /// provide copy constructor
00051     FXFontMatrix(const FXFontMatrix &M);
00052 
00053     /// adjust font size
00054     void setFontSz(FXfloat FontSz);
00055 
00056     /// rotation angle (+) Rotates counter-clockwise
00057     void setRotate(FXfloat T);
00058 
00059     /// set shear metric (+) Shears counter-clockwise
00060     void setShear(FXfloat T);
00061 
00062     /// set font to anamorphic
00063     void setAnamorphic(FXfloat a1, FXfloat d1);
00064 
00065     /// set font to mirror about X
00066     void setMirrorX();
00067 
00068     /// set font to mirror about Y
00069     void setMirrorY();
00070 
00071     /// allow font metrics multiplication
00072     friend FXFontMatrix operator * (FXFontMatrix M1, FXFontMatrix M2);
00073   };
00074 
00075 
00076 /**
00077  * A Rotatable Font is like any other font, in that you can draw the font onto your FXDC.
00078  * It differs in that it has the ability to be able to draw the font at a specified angle,
00079  * rather than the tradional left-to-right.
00080  */
00081 class FXAPI FXRotatableFont : public FXFont {
00082   protected:
00083     FXfloat pixelMul;     // pixel scaling factor
00084     FXFontMatrix matrix;  // font metrics
00085 
00086 #ifndef WIN32
00087   protected:
00088     /**
00089      * We need this to get the Resolution and the
00090      * complete font data from the font Dialog Box
00091      */
00092     FXString getFontStr(void);
00093 
00094     // We need to get at the attributes data to calculate the character width
00095     FXint getFontAttributes(const FXchar *text, FXuint n);
00096 
00097     /**
00098      * Set the font's XLFD name. copy of the XLFD font constructor for FXFont
00099      * (except the reset of size etc to 0 is removed)
00100      */
00101     void setXName(const FXString& n);
00102 #endif
00103 
00104   public:
00105     /**
00106      * Construct font from font description
00107      */
00108     FXRotatableFont(FXApp* a,const FXFontDesc& fontdesc,FXfloat ang=0);
00109 
00110     /**
00111      * Construct a font with given face name, size in points(pixels),
00112      * weight, slant, character set encoding, setwidth, and hints
00113      */
00114     FXRotatableFont(FXApp* a,const FXString& face,FXuint sz,FXfloat ang=0,FXuint wt=FONTWEIGHT_NORMAL,FXuint sl=FONTSLANT_REGULAR,FXuint enc=FONTENCODING_DEFAULT,FXuint setw=FONTSETWIDTH_DONTCARE,FXuint h=0);
00115 
00116     /// display text using font
00117     void displayText(FXDC& dc,const FXString& str,FXint xstart,FXint ystart);
00118 
00119     /// return angle
00120     FXfloat getAngle() const { return angle; }
00121 
00122     /// set to new angle
00123     void setAngle(FXfloat ang);
00124 
00125     /// create font resources
00126     void create();
00127   };
00128 
00129 } // namespace FXEX
00130 #endif // FXROTATABLEFONT_H