/*
 * $Id: tkcanvas.trm,v 1.7 1998/04/14 00:18:11 drd Exp $
 *
 */

/* GNUPLOT - tkcanvas.trm */

/*[
 * Copyright 1990 - 1993, 1998
 *
 * Permission to use, copy, and distribute this software and its
 * documentation for any purpose with or without fee is hereby granted,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.
 *
 * Permission to modify the software is granted, but not the right to
 * distribute the complete modified source code.  Modifications are to
 * be distributed as patches to the released version.  Permission to
 * distribute binaries produced by compiling modified sources is granted,
 * provided you
 *   1. distribute the corresponding source modifications from the
 *    released version in the form of a patch file along with the binaries,
 *   2. add special version identification to distinguish your version
 *    in addition to the base release version number,
 *   3. provide your name and address as the primary contact for the
 *    support of your modified version, and
 *   4. retain our contact information in regard to use of the base
 *    software.
 * Permission to distribute the released version of the source code along
 * with corresponding source modifications in the form of a patch file is
 * granted with same provisions 2 through 4 for binary distributions.
 *
 * This software is provided "as is" without express or implied warranty
 * to the extent permitted by applicable law.
]*/

/*
 * This file is included by ../term.c.
 *
 * This terminal driver supports:
 *  Tk/Tcl canvas widgets
 *
 * AUTHORS - original dxy.trm
 *  Martin Yii, eln557h@monu3.OZ
 *  Further modified Jan 1990 by Russell Lang, rjl@monu1.cc.monash.oz
 *
 * Port to the Tk/Tcl canvas widget  
 *  D. Jeff Dionne, July 1995 jeff@ryeham.ee.ryerson.ca
 *  Alex Woo, woo@playfair.stanford.edu
 *
 * send your comments or suggestions to (info-gnuplot@dartmouth.edu).
 * 
 */

/*
 * adapted to the new terminal layout by Alex Woo (Sept. 1996)
 */

#include "driver.h"

#ifdef TERM_REGISTER
register_term(tkcanvas)
#endif

#ifdef TERM_PROTO
TERM_PUBLIC void TK_init __PROTO((void));
TERM_PUBLIC void TK_graphics __PROTO((void));
TERM_PUBLIC void TK_text __PROTO((void));
TERM_PUBLIC void TK_linetype __PROTO((int linetype));
TERM_PUBLIC void TK_move __PROTO((unsigned int x, unsigned int y));
TERM_PUBLIC void TK_vector __PROTO((unsigned int x, unsigned int y));
TERM_PUBLIC void TK_put_text __PROTO((unsigned int x, unsigned int y, char *str));
TERM_PUBLIC void TK_reset __PROTO((void));

#define TK_XMAX 1000
#define TK_YMAX 1000

#define TK_XLAST (TK_XMAX - 1)
#define TK_YLAST (TK_XMAX - 1)

#define TK_VCHAR	(25)	/* double actual height of characters */
#define TK_HCHAR	(16)	/* actual width including spacing */
#define TK_VTIC	(18)
#define TK_HTIC	(18)
#endif /* TERM_PROTO */

#ifndef TERM_PROTO_ONLY
#ifdef TERM_BODY

static int tk_angle = 0;
static int tk_lastx;
static int tk_lasty;
static int tk_color = 0;
static char *tk_colors[] = { "black", "gray", "red", "blue", "green", "brown", "magenta", "cyan" };

TERM_PUBLIC void TK_init()
{
    fputs("\
proc gnuplot can {\n\
$can delete all\n\
set cmx [lindex [$can configure -width] 4]\n\
set cmy [lindex [$can configure -height] 4]\n",
	  gpoutfile);

    tk_lastx = tk_lasty = tk_color = 0;
}


TERM_PUBLIC void TK_graphics()
{
}


TERM_PUBLIC void TK_reset()
{
}

TERM_PUBLIC void TK_linetype(linetype)
int linetype;
{
    tk_color = (linetype + 2) & 7;
}

TERM_PUBLIC void TK_move(x, y)
unsigned int x, y;
{
    tk_lastx = x;
    tk_lasty = 1000 - y;
}


TERM_PUBLIC void TK_vector(x, y)
unsigned int x, y;
{
    y = 1000 - y;
    fprintf(gpoutfile,
	    "$can create line [expr $cmx * %d /1000] [expr $cmy * %d /1000] [expr $cmx * %d /1000] [expr $cmy * %d /1000] -fill %s\n",
	    tk_lastx, tk_lasty, x, y, tk_colors[tk_color]);
    tk_lastx = x;
    tk_lasty = y;
}


TERM_PUBLIC void TK_put_text(x, y, str)
unsigned int x, y;
char *str;
{
    y = 1000 - y;
    fprintf(gpoutfile,
	    "$can create text [expr $cmx * %d /1000] [expr $cmy * %d /1000] -text {%s} -fill %s -anchor w\n",
	    x, y, str, tk_colors[tk_color]);
}

TERM_PUBLIC void TK_text()
{
    fputs("}\n", gpoutfile);
    fflush(gpoutfile);
}


#endif /* TERM_BODY */

#ifdef TERM_TABLE
TERM_TABLE_START(tkcanvas)
    "tkcanvas", "Tk/Tcl canvas widget",
    TK_XMAX, TK_YMAX, TK_VCHAR, TK_HCHAR,
    TK_VTIC, TK_HTIC, options_null, TK_init, TK_reset,
    TK_text, null_scale, TK_graphics, TK_move, TK_vector,
    TK_linetype, TK_put_text, null_text_angle,
    null_justify_text, do_point, do_arrow, set_font_null
TERM_TABLE_END(tkcanvas)

#undef LAST_TERM
#define LAST_TERM tkcanvas

#endif /* TERM_TABLE */
#endif /* TERM_PROTO_ONLY */

#ifdef TERM_HELP
START_HELP(tkcanvas)
"1 tkcanvas",
"?commands set terminal tkcanvas",
"?set terminal tkcanvas",
"?set term tkcanvas",
"?terminal tkcanvas",
"?term tkcanvas",
"?tkcanvas",
" This terminal driver generates tk canvas widget commands.  To use it, rebuild",
" `gnuplot` (after uncommenting or inserting the appropriate line in \"term.h\"),",
" then",
"",
"  gnuplot> set term tkcanvas",
"  gnuplot> set output 'plot.file'",
"",
" After invoking \"wish\", execute the following sequence of tcl commands:",
"",
"  % source plot.file",
"  % canvas .c",
"  % pack .c",
"  % gnuplot .c",
"",
" The code generated by `gnuplot` creates a tcl procedure called \"gnuplot\"",
" that takes the name of a canvas as its argument.  When the procedure is,",
" called, it clears the canvas, finds the size of the canvas and draws the plot",
" in it, scaled to fit.",
"",
" The current version of `tkcanvas` supports neither `multiplot` nor `replot`."
END_HELP(tkcanvas)
#endif