// XGWin.h
// C++ Library for easy XLib- usage. 
// Written by Rainer Malaka and Kay-Ole Behrmann
//
// This File Declares:
//      XMonoWin for Windows with Black/White Graphics (0=Black,1=White)
//      XGrayWin for Windows with GrayLeves 0=Black, MAXLEVELS=White
//      XColorWin for Windows with Colors.
//XMonoWin is fast and does not need much Memory.
//
//XGrayWin is moderately fast (depends on how many GCs a server can cache,
// and how many Graylevels are defined through MAXLEVELS) and needs much
// memory for GC-Allocation for each Graylevel. All XGrayWins use the same
// GCs, only the first incarnation allocates them.
//
//XColorWin is slow, but does not need much memory. The GC is modified
// for each pixel drawn.
//
// **** Don`t forget to use Flush after drawing ! ****
//

#include "X11/Xlib.h"
#include "X11/Xatom.h"
#include "X11/Xutil.h"

// Vorgehen, um verschiedene Farben zum Zeichnen zu benutzen:
// -  entweder:  viele verschiedene GCs vorher erzeugen und dann benutzen
// -  oder    : bei jedem Aufruf der Zeichenfunktion XSetForeground aufrufen

#define MAXLEVELS 128 // Anzahl der Graustufen in XGrayWin. Darf nicht allzu
                    // gross sein, da fuer jede graustufe ein GC angelegt wird!

class XMonoWin
{
  int screen_num;         /* screen of display, normalerweise 0 */
  Screen *screen_ptr;     /* dummy */
  GC gc_white;
  GC gc_black;
  Window win;
  XFontStruct *font_info;

  void loadFont(XFontStruct **font_info);
  void hole_GCs(void);

 public:
  XMonoWin(nsl_string name, int dx, int dy, int x, int y);     // Constructor
  ~XMonoWin();                                            // Destructor
  void Line (int x1, int y1, int x2, int y2, int col=0);  // col=0
  void Dot  (int x1, int y1,                 int col=0);  // means
  void Rect (int x1, int y1, int width, int height, int col=0);
  void Text (int x1, int y1, char *text,     int col=0);  // black
  void Flush(void);                                    // Don't forget !
  void ClearArea(int x1,int y1,int dx,int dy);
  void Clear(void);
};
//*****************************************************************************
class XGrayWin
{
  int screen_num;         /* screen of display, normalerweise 0 */
  Screen *screen_ptr;     /* dummy */
  Window win;
  XFontStruct *font_info;

  void loadFont(XFontStruct **font_info);
  void hole_GCs(void);

 public:
  XGrayWin(char *name, int dx, int dy, int x, int y);     // Constructor
  ~XGrayWin();                                            // Destructor
  void Line (int x1, int y1, int x2, int y2, float col=0);
  void Dot  (int x1, int y1,                 float col=0);
  void Rect (int x1, int y1, int width, int height, float col=0);
  void Text (int x1, int y1, char *text,     float col=0);
  void DrawText (int x1, int y1, char *text, float col=0);
  void Flush(void);                                     // Don't forget !
  void ClearArea(int x1,int y1,int dx,int dy);
  void Clear(void);
};
//*****************************************************************************
class XColorWin
{
  int screen_num;         /* screen of display, normalerweise 0 */
  Screen *screen_ptr;     /* dummy */
  GC gc_universal;        /* one for all */
  Colormap default_cmap;      /* Colormap fur XAllocColorCells */
  XColor color_universal;
  XColor def_red;              /* basic colors */
  XColor def_green;            /* ..will be */
  XColor def_blue;             /* ..mixed */
  XColor alldefs[4096];
  Window win;
  XStandardColormap best_map_info;

  unsigned long PlaneMasks[1];
  unsigned long Pixels[256];

  XFontStruct *font_info;

  void loadFont(XFontStruct **font_info);
  void hole_GCs(void);

 public:
  XColorWin(char *name, int dx, int dy, int x, int y);     // Constructor
  ~XColorWin();                                            // Destructor
  void Line (int x1, int y1, int x2, int y2, float Rlevel,float Glevel, float Blevel);
  void Dot  (int x1, int y1,                 float Rlevel,float Glevel, float Blevel);
  void Text (int x1, int y1, char *text,     float Rlevel,float Glevel, float Blevel);
  void DrawText (int x1, int y1, char *text, float Rlevel,float Glevel, float Blevel);
  void Flush(void);                                    // Don't forget !
  void ClearArea(int x1,int y1,int dx,int dy);
  void Clear(void);
};