//
// Copyright 2008 Johannes Hofmann <Johannes.Hofmann@gmx.de>
//
// This software may be used and distributed according to the terms
// of the GNU General Public License, incorporated herein by reference.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include <FL/Fl.H>
#include <FL/Fl_Double_Window.H>

#include "CurveEditor.H"

static CurveEditor *ce;
static char cmd[2048];

static void editor_cb(Fl_Widget* o, void* d) {
	double x, y;

	printf("%s ", cmd);
	for (int i = 0; i<ce->get_n(); i++) {
		if (i != 0)
			printf(",");
		ce->get_point(i, &x, &y);
		printf("%.4g:%.4g", x, y);
	}
	printf("\n");
	fflush(stdout);
}

static void
stdin_cb(int fd, void *d) {
	char *curve = NULL;

	fgets(cmd, sizeof(cmd), stdin);

	for (int i = strlen(cmd) - 1; i >= 0; i--)
		if (isspace(cmd[i])) {
			cmd[i] = '\0';
			if (curve)
				break;
		} else
			curve = &cmd[i];

	if (curve) {
		double x, y;
		char *pstr;

		ce->clear();
		while (pstr = strsep(&curve, ",")) {
			if (sscanf(pstr, "%lf:%lf", &x, &y) != 2 ||
				y < 0 || x > 1 || y < 0 || y > 1) {
				fprintf(stderr, "Could not parse control point %s.\n", pstr);
				continue;
			}       
			ce->add_point(x, y);
		} 
	}
}

int
main(int argc, char **argv) {
	Fl_Double_Window window(800, 600, "pnmcurvedit");
	ce = new CurveEditor(0, 0, 800, 600);
	ce->add_point(0.0, 0.0);
	ce->add_point(0.5, 0.5);
	ce->add_point(1.0, 1.0);
	ce->callback(editor_cb, NULL);

	window.resizable(ce);
	window.show(argc, argv);

	Fl::add_fd(0, FL_READ, stdin_cb);

	return Fl::run();
}