/*
 * solidify.c - Merge two opposing faces of a part into a solid
 *
 * Written 2010 by Werner Almesberger
 * Copyright 2010 Werner Almesberger
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */


#include <stdlib.h>
#include <stdio.h>
#include <locale.h>
#include <gtk/gtk.h>

#include "face.h"
#include "level.h"
#include "overlap.h"


static struct face *face_a, *face_b;
static const struct face *active;
static GtkWidget *canvas;


static void clicked(GtkButton *button, gpointer user_data)
{
	struct face *face = user_data;

	if (active == face)
		return;

	gtk_widget_destroy(gtk_bin_get_child(GTK_BIN(canvas)));

	if (face)
		level(canvas, face);
	else
		overlap(canvas, face_a);
	active = face;

	gtk_widget_show_all(canvas);
}


static GtkWidget *gui_buttons(void)
{
	GtkWidget *vbox, *but;

	vbox = gtk_vbox_new(FALSE, 0);

	but = gtk_button_new_with_label("A");
	gtk_box_pack_start(GTK_BOX(vbox), but, FALSE, FALSE, 0);
	g_signal_connect(G_OBJECT(but), "clicked",
	    G_CALLBACK(clicked), face_a);

	but = gtk_button_new_with_label("B");
	gtk_box_pack_start(GTK_BOX(vbox), but, FALSE, FALSE, 0);
	g_signal_connect(G_OBJECT(but), "clicked",
	    G_CALLBACK(clicked), face_b);

	but = gtk_button_new_with_label("A+B");
	gtk_box_pack_start(GTK_BOX(vbox), but, FALSE, FALSE, 0);
	g_signal_connect(G_OBJECT(but), "clicked",
	    G_CALLBACK(clicked), NULL);

	return vbox;
}


static gboolean key_press_event(GtkWidget *widget, GdkEventKey *event,
    gpointer data)
{
	if (event->keyval == 'q')
		gtk_main_quit();
	return TRUE;
}


static void gui(void)
{
	GtkWidget *root, *hbox, *buttons;

	root = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	gtk_window_set_position(GTK_WINDOW(root), GTK_WIN_POS_CENTER);

	hbox = gtk_hbox_new(FALSE, 0);
	gtk_container_add(GTK_CONTAINER(root), hbox);

	canvas = gtk_event_box_new();
	gtk_box_pack_start(GTK_BOX(hbox), canvas, FALSE, FALSE, 0);

	/* initialize root->window */
	gtk_widget_show_all(root);

	buttons = gui_buttons();
	gtk_box_pack_start(GTK_BOX(hbox), buttons, FALSE, FALSE, 0);

	level(canvas, face_a);
	active = face_a;

	gtk_widget_show_all(root);

	g_signal_connect(G_OBJECT(root), "key-press-event",
	    G_CALLBACK(key_press_event), NULL);
	g_signal_connect(G_OBJECT(root), "destroy",
	    G_CALLBACK(gtk_main_quit), NULL);

	gtk_main();
}


static void usage(const char *name)
{
	fprintf(stderr, "usage: %s top XXXbottomXXX\n", name);
	exit(1);
}


int main(int argc, char **argv)
{
	gtk_init(&argc, &argv);
	switch (argc) {
	case 2:
		break;
	default:
		usage(*argv);
	}
	setlocale(LC_ALL, "C"); /* damage control */
	face_a = read_face(argv[1]);
	face_b = face_a;
	gui();

	return 0;
}