//
//      Holds system header includes, prototypes of xwin driver
//      utility functions, and definition of the state structure.
//

#ifndef __PLTKWD_H__
#define __PLTKWD_H__

#include "plplot.h"
#include "plstrm.h"

// System headers

#ifndef MAC_TCL
#ifndef __MWERKS__
#include <sys/types.h>
#endif
#endif

#include <tk.h>
#ifdef MAC_TCL
#else
// These are pulled in by 'tkMacPort.h'
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/cursorfont.h>
#include <X11/keysym.h>
#endif
// Specify max number of displays in use

#define PLTKDISPLAYS    100

// Set constants for dealing with colormap.  In brief:
//
// ccmap                When set, turns on custom color map
//
// See Init_CustomCmap() and  Init_DefaultCmap() for more info.
// Set ccmap at your own risk -- still under development.
//

static int plplot_tkwin_ccmap = 0;

// One of these holds the display info, shared by all streams on a given
// display

typedef struct
{
    int       nstreams;                 // Number of streams using display
    int       ixwd;                     // Specifies tkwDisplay number
    char      *displayName;             // Name of X display
    int       screen;                   // X screen
    Display   *display;                 // X display
    Visual    *visual;                  // X Visual
    GC        gcXor;                    // Graphics context for XOR draws
    Colormap  map;                      // Colormap
    unsigned  depth;                    // display depth
    int       color;                    // Set to 1 if a color output device
    int       ncol0;                    // Number of cmap 0 colors allocated
    int       ncol1;                    // Number of cmap 1 colors allocated
    XColor    cmap0[16];                // Color entries for cmap 0
    XColor    cmap1[256];               // Color entries for cmap 1
    XColor    fgcolor;                  // Foreground color (if grayscale)
    Tk_Cursor xhair_cursor;             // Crosshair cursor
} TkwDisplay;

// One of these holds the X driver state information

typedef struct
{
    TkwDisplay   *tkwd;                            // Pointer to display info

    Window       window;                           // X window id
    Pixmap       pixmap;                           // Off-screen pixmap
    GC           gc;                               // Graphics context
    XColor       curcolor;                         // Current pen color

    long         event_mask;                       // Event mask
    int          flags;                            // 1 = delete, 2 = exit event loop
    long         init_width;                       // Initial window width
    long         init_height;                      // Initial window height

    unsigned     width, height, border;            // Current window dimensions

    double       xscale_init;                      // initial pixels/lx (virt. coords)
    double       yscale_init;                      // initial pixels/ly (virt. coords)
    double       xscale;                           // as above, but current value
    double       yscale;                           //  (after possible resizing)

    short        xlen, ylen;                       // Lengths of device coord space

    int          write_to_window;                  // Set if plotting direct to window
    int          write_to_pixmap;                  // Set if plotting to pixmap

    int          instr;                            // Instruction timer
    int          max_instr;                        // Limit before X server is queried

    PLGraphicsIn gin;                              // Graphics input structure

    int          locate_mode;                      // Set while in locate mode
    int          drawing_xhairs;                   // Set during xhair draws
    XPoint       xhair_x[2], xhair_y[2];           // Crosshair lines

    void ( *MasterEH )( PLStream *, XEvent * );    // Master X event handler
} TkwDev;

//--------------------------------------------------------------------------
//		Function Prototypes
//--------------------------------------------------------------------------

#ifdef __cplusplus
extern "C" {
#endif

// Performs basic driver initialization.

void
plD_open_tkwin( PLStream *pls );

// Copies the supplied PLColor to an XColor

void
PLColor_to_TkColor( PLColor *plcolor, XColor *xcolor );

// Copies the supplied XColor to a PLColor

void
PLColor_from_TkColor( PLColor *plcolor, XColor *xcolor );

// Same but also tells me if the color changed
int
PLColor_from_TkColor_Changed( PLColor *plcolor, XColor *xcolor );

void Tkw_StoreColor( PLStream* pls, TkwDisplay* tkwd, XColor* col );

// Set background & foreground colors.

void
pltkwin_setBGFG( PLStream *pls );

#ifdef __cplusplus
}
#endif

#endif  // __PLTKWD_H__