/* Terminality - a portable terminal handling library
 * Copyright (C) 1998-2002, Emil Mikulic.
 * This is LGPL - look at COPYING.LIB
 */

/* Project:     Terminality/GUI
 * File:	radio.cpp
 * Author:      Michal Safranek
 * Description: Implements the radio class and radioGroup class
 */

#include <gui.h>

const char radio_rcsid[] =
"$Id: radio.cpp,v 1.10 2002/07/26 01:39:40 darkmoon Exp $";



// radioGroup class implementation ...

// Constructor
radioGroup::radioGroup()
{
	members = NULL;
	selected_id = -1;
}



// Add a button to list
void radioGroup::add(class radio *me)
{
	if (members)
		tn_list_add(members,(void *)me);
	else
		members = tn_list_new((void *)me);
}



// Fix buttons after change
void radioGroup::fixup(int id)
{
	selected_id = id;

	// Draw static objects
	for (int i = 0; i<tn_list_size(members); i++) {
		class radio *r = (class radio *)tn_list_getdata(members, i);
		if ((r->radio_id != selected_id) && (r->selected)) {
			r->selected = false;
			r->draw();
		}
	}
}



// Destructor
radioGroup::~radioGroup()
{
	if (members != NULL) {
		tn_list_free(members);
		tn_list_kill(members);
	}
}



// radio class implementation ...
#define REDEF_CHARS()	LBOX_CHR = '<'; RBOX_CHR = '>';	\
			CHECK_UNCHECKED_CHR = ' '; CHECK_CHECKED_CHR = 'o';

// Construct radio at <x,y>
radio::radio(class radioGroup *rg, const int id, const int xx, const int yy,
	bool sel) : checkbox(xx,yy,sel)
{
	radio_id = id;
	rgroup = rg;
	type_id = Radio;
	if(rgroup) rgroup->add(this);
	if(sel){
		if(rgroup)
			rgroup->fixup(radio_id);
	}
	REDEF_CHARS();
}



// Construct radio at <x,y> using <s> for a buffer
radio::radio(class radioGroup *rg, const int id, const int xx, const int yy,
	bool sel, const char *s) : checkbox(xx,yy,sel,s)
{
	radio_id = id;
	rgroup = rg;
	type_id = Radio;
	if(rgroup) rgroup->add(this);
	if(sel){
		if(rgroup)
			rgroup->fixup(radio_id);
	}
	REDEF_CHARS();
}



// Construct radio at <x,y> using <s> for a buffer, label's width <w>
radio::radio(class radioGroup *rg, const int id, const int xx, const int yy,
	bool sel, const char *s, const int w) : checkbox(xx,yy,sel,s,w)
{
	radio_id = id;
	rgroup = rg;
	type_id = Radio;
	if(rgroup) rgroup->add(this);
	if(sel){
		if(rgroup)
			rgroup->fixup(radio_id);
	}
	REDEF_CHARS();
}



// Destroy radio
radio::~radio()
{
}



// Draw radio
void radio::draw(void)
{
	if (!visible) return;
	checkbox::draw();
}



/* Non-blocking get function
 * Returns: 0 - enter, 27 - ESC, -1 - up, 1 - down, 2 - tab
 */
int radio::getnb(void)
{
	key c;
	int result = 101;
	cursor cs = get_cursor();
	bool old_vis = visible;
	
	visible = true;
	set_cursor(none);
	focus = true;
	draw();

	/* Get the input */
	do {
		// Update screen
		update();

		/* Get letter */
		c = readkey();
		c = keyhandler(c, Radio);
		c = handle_key(c, Radio, this);

		/* Handle input */
		switch (c) {
			// filter
			case KEY_ENTER: result = 0; break;
			case KEY_ESC: result = 27; break;
			case KEY_UP: result = -1; break;
			case KEY_DOWN: result = 1; break;
			case KEY_TAB: result = 2; break;
			case ' ':
				if (!selected) {
					selected = true;
					if (rgroup)
						rgroup->fixup(radio_id);
					if (spc_handle)
						spc_handle(radio_id);
					draw();
				}
				if(onchange)
					onchange(Radio, this);
				break;

			case KEY_NOTHING:
				break;

			default:
				beep();
		}
	} while (result == 101);

	visible = old_vis;
	set_cursor(cs);
	focus = false;
	
	return result;
}



// Blocking get (cannot be aborted)
bool radio::get(void)
{
	while (1) {
		switch (getnb()) {
		case 27: return 0;
		case 0: return selected;
		}
	}
}