interface.cpp - emulators/yapesdl - Rivoreo Source Code Repositories

 /*
 	YAPE - Yet Another Plus/4 Emulator

 	The program emulates the Commodore 264 family of 8 bit microcomputers

 	This program is free software, you are welcome to distribute it,
 	and/or modify it under certain conditions. For more information,
 	read 'Copying'.

 	(c) 2000, 2001, 2005 Attila Grósz
 */

 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include "types.h"
 #include "monitor.h"
 #include "tedmem.h"
 #include "interface.h"
 #include "archdep.h"
 #include "prg.h"
 #include "tape.h"
 #include "drive.h"
 #include "roms.h"
 #include "SaveState.h"

 #ifndef SDL_CONTROLLERBUTTONDOWN // Emscripten
 #define SDL_CONTROLLERBUTTONDOWN -1
 #endif

 extern bool autostart_file(const char *szFile, bool autostart = true);
 extern bool start_file(const char *szFile, bool autostart = true);
 extern bool openZipDisk(const char *fname, bool autostart);
 extern void machineDoSomeFrames(unsigned int frames);
 extern void machineEnable1551(bool enable);
 extern bool machineIsTrueDriveEnabled(unsigned int dn);
 extern void machineReset(bool hardreset);
 extern void setMainLoop(int looptype);

 #define COLOR(COL, SHADE) ((SHADE<<4)|COL|0x80)
 #define MAX_LINES 25
 #define MAX_INDEX (MAX_LINES - 1)
 #define LISTOFFSET (ted8360->getCyclesPerRow() == 456 ? 52 : 114)

 // TODO this is ugly and kludgy like hell but I don't have time for better
 static menu_t main_menu = {
 	"Main menu",
 	"",
 	{
 		{"Load PRG file...", 0, UI_FILE_LOAD_PRG },
 		{"Attach disk image...", 0, UI_DRIVE_ATTACH_IMAGE },
 		{"Detach disk image", 0, UI_DRIVE_DETACH_IMAGE },
 		{ "             ", 0, UI_MENUITEM_SEPARATOR },
 		{"Emulator snapshot...", 0, UI_FILE_LOAD_FRE },
 		{ "             ", 0, UI_MENUITEM_SEPARATOR },
 		{ "Attach rom...", 0, UI_CRT_ATTACH },
 		{ "Detach rom...", 0, UI_CRT_DETACH },
 		{ "             ", 0, UI_MENUITEM_SEPARATOR },
 		{"Tape controls...", 0, UI_MENUITEM_MENULINK },
 		{"             ", 0, UI_MENUITEM_SEPARATOR },
 		{"Options..."	, 0, UI_MENUITEM_MENULINK },
 		{"             ", 0, UI_MENUITEM_SEPARATOR },
 		{"Enter monitor", 0, UI_EMULATOR_MONITOR },
 		{"Resume emulation"	, 0, UI_EMULATOR_RESUME },
 		{ "             ", 0, UI_MENUITEM_SEPARATOR },
 		{"Reset emulator", 0, UI_EMULATOR_RESET },
 		{ "             ", 0, UI_MENUITEM_SEPARATOR },
 		{"Quit YAPE"	, 0, UI_EMULATOR_EXIT }
 	},
 	0,
 	15,
 	0,
 	0,
 	0
 };

 static menu_t tape_menu = {
 	"Tape control menu",
 	"",
 	{
 		{"Attach TAP image...", 0, UI_TAPE_ATTACH_TAP },
 		{"             ", 0, UI_MENUITEM_SEPARATOR },
 		{"Create TAP image", 0, UI_TAPE_CREATE_TAP },
 		{"             ", 0, UI_MENUITEM_SEPARATOR },
 		{"Detach TAP image", 0, UI_TAPE_DETACH_TAP },
 		{"             ", 0, UI_MENUITEM_SEPARATOR },
 		{"Press PLAY"	, 0, UI_TAPE_PLAY },
 		{"Press RECORD"	, 0, UI_TAPE_RECORD },
 		{"Press STOP"	, 0, UI_TAPE_STOP },
 		{"Rewind tape"	, 0, UI_TAPE_REWIND }
 	},
 	0,
 	10,
 	0,
 	0,
 	0
 };

 static menu_t snapshot_menu = {
 	"Emulator snapshot menu",
 	"",
 	{
 		{"Load snapshot...", 0, UI_SNAPSHOT_LOAD },
 		{"Save quicksnapshot...", 0, UI_SNAPSHOT_QUICKSAVE }
 	},
 	0,
 	2,
 	0,
 	0,
 	0
 };

 static menu_t options_menu = {
 	"Options menu",
 	"",
 	{
 		{"Dummy", 0, UI_MENUITEM_MENULINK },
 	},
 	0,
 	5,
 	0,
 	0,
 	0
 };

 static menu_t file_menu;
 static menu_t tap_list;
 static menu_t d64_list;
 static menu_t fre_list;
 static menu_t crt_list;
 static unsigned int *pixels;
 extern void frameUpdate(unsigned char *src, unsigned int *target);

 static rvar_t *findRVar(char *name)
 {
 	rvar_t **rv = settings;
 	while (*rv) {
 		rvar_t *item = *rv++;
 		while (item && item->value) {
 			if (!strcmp(name, item->menuName))
 				return item;
 			item++;
 		}
 	}
 	return NULL;
 }

 UI::UI(class TED *ted) :
 	display(ted->screen), charset(kernal + 0x1400), ted8360(ted)
 {
 	pixels = new unsigned int[512 * 312 * 2];
 	// Link menu structure
 	main_menu.element[0].child = &file_menu;
 	main_menu.element[1].child = &d64_list;
 	main_menu.element[4].child = &fre_list;// snapshot_menu;
 	main_menu.element[6].child = &crt_list;
 	main_menu.element[9].child = &tape_menu;
 	main_menu.element[11].child = &options_menu;
 	tape_menu.element[0].child = &tap_list;

 	curr_menu = &main_menu;
 	strcpy(file_menu.title, "PRG file selection menu");
 	strcpy(tape_menu.title, "Tape controls menu");
 	strcpy(tap_list.title, "TAP image selection menu");
 	strcpy(d64_list.title, "Disk image selection menu");
 	strcpy(fre_list.title, "Emulator savestate selection menu");
 	strcpy(crt_list.title, "Cartridge/ROM selection menu");
 	file_menu.parent = curr_menu;
 	options_menu.parent = curr_menu;
 	tape_menu.parent = curr_menu;
 	tap_list.parent = &tape_menu;
 	d64_list.parent = curr_menu;
 	//snapshot_menu.parent = curr_menu;
 	fre_list.parent = curr_menu;
 	crt_list.parent = curr_menu;

 	// initialize settings menu
 	unsigned int i = 0, j = 0;
 	rvar_t **rv = settings;
 	while (rv[i]) {
 		rvar_t *item = rv[i++];
 		while (item && item->value) { // FIXME
 			strcpy(options_menu.element[j].name, item->menuName);
 			options_menu.element[j].menufunction = UI_MENUITEM_CALLBACKS;
 			options_menu.element[j].type = (UI_MenuTypes) item->type;
 			item++;
 			j++;
 		}
 	}
 	options_menu.nr_of_elements = j;
 }

 void UI::screen_update()
 {
 	const unsigned int cyclesPerRow = ted8360->getCyclesPerRow();
 	const int offset = cyclesPerRow == 504 ? -68 : 8;

 	frameUpdate(display + (cyclesPerRow - offset - 384) / 2 + 10 * cyclesPerRow, pixels);
 }

 void UI::clear(char color, char shade)
 {
 	memset(display, COLOR(color, shade), 512 * SCR_VSIZE);
 	screen_update();
 }

 void UI::set_color(unsigned char foreground, unsigned char background)
 {
 	bgcol = background;
 	fgcol = foreground;
 }

 void UI::texttoscreen(int x, int y, char *scrtxt, size_t len = 0)
 {
 	int i = 0;

 	if (!len) len = strlen(scrtxt);
 	while (scrtxt[i] != 0 && len--) {
 		chrtoscreen(x + i*8, y, asc2pet(scrtxt[i]));
 		i++;
 	}
 }

 void UI::chrtoscreen(int x,int y, char scrchr)
 {
 	int j, k;
 	unsigned char *cset;
 	const unsigned int CPR = ted8360->getCyclesPerRow();

 	cset = charset + (scrchr << 3);
 	for (j = 0; j<8; j++)
 		for (k = 0; k < 8; k++)
 			display[(y + j) * CPR + x + k] = (cset[j] & (0x80 >> k)) ? fgcol : bgcol;
 }

 void UI::hide_sel_bar(menu_t *menu)
 {
 	if ( menu->element[ menu->curr_sel ].menufunction == UI_DIR_ITEM)
 		set_color( COLOR(2,1), COLOR(1,5) );
 	else
 		set_color( COLOR(0,0), COLOR(1,5) );
 	texttoscreen(LISTOFFSET, 64 + (curr_menu->curr_line<<3),
 		menu->element[ curr_menu->curr_sel ].name);
 	screen_update();
 }

 void UI::show_sel_bar(menu_t * menu)
 {
 	set_color( COLOR(0,0), COLOR(15,7) );
 	texttoscreen(LISTOFFSET, 64 + (curr_menu->curr_line<<3),
 		menu->element[ curr_menu->curr_sel ].name);
 	screen_update();
 }

 void UI::show_settings_list(menu_t * menu, rvar_t *rvItems)
 {
 	int nf = 0;
 	menu->nr_of_elements = 0;
 	rvar_t *rvPtr = *settings;

 	while (rvPtr) {
 		strcpy(menu->element[nf].name, rvPtr->menuName);
 		menu->element[nf].child = 0;
 		menu->element[nf].type = MENU_CALLBACK;
 		nf++;
 		rvPtr++;
 	}
 	menu->nr_of_elements = nf;
 }

 void UI::show_file_list(menu_t * menu, UI_MenuClass type)
 {
 	int nf = 0, res;
 	char cfilename[512];
 	char *fileFoundName;
 	UI_FileTypes ft;

 	menu->nr_of_elements = 0;
 	res = ad_find_first_file("*");
 	fileFoundName = ad_return_current_filename();
 	ft = ad_return_current_filetype();
 	if (fileFoundName && !strcmp(fileFoundName, ".") )
 		res = ad_find_next_file();
 	if (!fileFoundName || strcmp(fileFoundName, "..") /*&& ft != UI_DRIVE_ITEM*/) {
 		strcpy( menu->element[nf++].name, "..");
 		menu->element[0].menufunction = UI_DIR_ITEM;
 	}
 	while (res) {
 		ft = ad_return_current_filetype();
 		// fprintf(stderr,"Parsed: %s\n", ad_return_current_filename());
 		if (ft != FT_FILE) {
 			strcpy(menu->element[nf].name, ad_return_current_filename());
 			menu->element[nf].menufunction = (ft == FT_DIR ? UI_DIR_ITEM : UI_DRIVE_ITEM);
 			++nf;
 		}
 		res = ad_find_next_file();
 	}
 	ad_find_file_close();
 	// populate file list
 	if (ft != FT_VOLUME) {

         unsigned int nrOfExts = 1;
         element_t ftypes[10];

 		switch ( type ) {
             case UI_T64_ITEM:
 			case UI_PRG_ITEM:
 			    nrOfExts = 3;
 			    strcpy(ftypes[0].name, "*.prg");
 				strcpy(ftypes[1].name, "*.P00");
                 strcpy(ftypes[2].name, "*.T64");
                 ftypes[0].menufunction = UI_PRG_ITEM;
                 ftypes[1].menufunction = UI_PRG_ITEM;
                 ftypes[2].menufunction = UI_T64_ITEM;
                 break;
 			case UI_TAP_ITEM:
 				strcpy(ftypes[0].name, "*.tap");
 				strcpy(ftypes[1].name, "*.wav");
 				ftypes[0].menufunction = UI_TAP_ITEM;
 				ftypes[1].menufunction = UI_TAP_ITEM;
 				nrOfExts = 2;
 				break;
 			case UI_D64_ITEM:
 			case UI_ZIP_ITEM:
                 strcpy(ftypes[0].name, "*.d64");
 				ftypes[0].menufunction = UI_D64_ITEM;
 				strcpy(ftypes[1].name, "*.zip");
 				ftypes[1].menufunction = UI_ZIP_ITEM;
 #ifdef WIN32
 				nrOfExts = 2;
 #else
                 nrOfExts = 3;
 				strcpy(ftypes[2].name, "*.D64");
                 ftypes[2].menufunction = UI_D64_ITEM;
 #endif
 				break;
 			case UI_FRE_ITEM:
 				strcpy(ftypes[0].name, "*.yss");
 				ftypes[0].menufunction = UI_FRE_ITEM;
 				break;
 			case UI_CRT_ITEM:
 				strcpy(ftypes[0].name, "*.crt");
 				strcpy(ftypes[1].name, "*.rom");
 				ftypes[0].menufunction =
 				ftypes[1].menufunction = UI_CRT_ITEM;
 				nrOfExts = 2;
 				break;
 			case UI_DRIVE_SET_DIR:
 				menu->nr_of_elements = nf;
 			default:
 				return;
 		}
 		//
 		unsigned int k = nrOfExts - 1;
 		do {
             strcpy(cfilename, ftypes[k].name);
             type = ftypes[k].menufunction;
             res = ad_find_first_file(cfilename);
             while(res) {
                 strcpy(menu->element[nf].name, ad_return_current_filename());
                 menu->element[nf].menufunction = type;
                 ++nf;
                 res = ad_find_next_file();
             }
             ad_find_file_close();
 		} while (k--);
 		//
 	}
 	menu->nr_of_elements = nf;
 }

 void UI::openD64Item(const char *name)
 {
 	machineEnable1551(false);
 	if (CTrueDrive::GetRoot()) {
 		CTrueDrive::SwapDisk(name);
 		const Uint8 *state = SDL_GetKeyboardState(NULL);
 		if (state[SDL_SCANCODE_LSHIFT] || state[SDL_SCANCODE_RSHIFT]) {
 			autostart_file(name);
 		}
 	}
 }

 bool UI::handle_menu_command( struct element_t *element)
 {
 	int menuSelection;
 	UI_MenuClass ptype = UI_MENUITEM_MENULINK;

 	// FIXME this must be nicer
 	if (!curr_menu->parent) {
 		menuSelection = element->menufunction;
 	} else {
 		ptype = curr_menu->parent->element[ curr_menu->parent->curr_sel ].menufunction;
 		menuSelection = element->menufunction;
 	}

 	switch ( menuSelection ) {

 		case UI_MENUITEM_MENULINK:
 			return false;

 		case UI_MENUITEM_CALLBACKS:
 			{	// find rvar and use callback
 				rvar_t *rv = findRVar(element->name);
 				if (rv) {
 					switch (rv->type) {
 						case RVAR_TOGGLE:
 							// if callback specified, call it otherwise toggle ourselves
 							if (rv->callback)
 								(rv->callback)(NULL);
 							else {
 								int *value = ((int*)(rv->value));
 								*value = !*value;
 							}
 							break;

 						case RVAR_HEX:
 						case RVAR_INT:
 							if (rv->callback)
 								(rv->callback)(NULL);
 							break;

 						case RVAR_STRING_FLIPLIST:
 							if (rv->callback) {
 								char text[64];
 								(rv->callback)(text);
 							}
 							break;

 						default:;
 					}
 				}
 			}
 			return false;

 		case UI_DRIVE_ITEM:
 			ad_exit_drive_selector();
 		case UI_DIR_ITEM:
 			if (ad_set_curr_dir(element->name)) {
 				ad_get_curr_dir( (char*)&(curr_menu->subtitle) );
 				if ( ptype == UI_FILE_LOAD_PRG )
 					show_file_list( &file_menu, UI_PRG_ITEM );
 				else if ( ptype == UI_TAPE_ATTACH_TAP )
 					show_file_list( &tap_list, UI_TAP_ITEM );
 				else if ( ptype == UI_DRIVE_ATTACH_IMAGE )
 					show_file_list( &d64_list, UI_D64_ITEM );
 				else if (ptype == UI_FILE_LOAD_FRE)
 					show_file_list(&fre_list, UI_FRE_ITEM);
 				else if (ptype == UI_CRT_ATTACH)
 					show_file_list(&crt_list, UI_CRT_ITEM);
 				curr_menu->curr_sel = 0;
 				curr_menu->curr_line = 0;
 				curr_menu->uppermost = 0;
 			}
 			/*if ( curr_menu->curr_sel >= file_menu.nr_of_elements )
 				curr_menu->curr_sel = file_menu.nr_of_elements - 1;*/
 			return false;

         case UI_T64_ITEM:
 		case UI_PRG_ITEM:
 			{
 				const Uint8 *state = SDL_GetKeyboardState(NULL);
 				if (state[SDL_SCANCODE_LSHIFT] || state[SDL_SCANCODE_RSHIFT]) {
 					autostart_file(element->name);
 				} else {
 				    if (menuSelection != UI_T64_ITEM)
                         PrgLoad(element->name, 0, ted8360);
                     else
                         prgLoadFromT64(element->name, 0, ted8360);
 				}
 			}
 			clear (0, 0);
             break;

 		case UI_TAP_ITEM:
 			{
 				const Uint8 *state = SDL_GetKeyboardState(NULL);
 				if (state[SDL_SCANCODE_LSHIFT] || state[SDL_SCANCODE_RSHIFT]) {
 					autostart_file(element->name);
 				} else
 					ted8360->tap->attachTape(element->name);
 			}
 			break;
 		case UI_D64_ITEM:
 			openD64Item(element->name);
 			break;
 		case UI_ZIP_ITEM:
 			start_file(element->name, true);
 			break;
 		case UI_CRT_ITEM:
 			ted8360->loadromfromfile(1, element->name, 0);
 			break;
 		case UI_FRE_ITEM:
 			SaveState::openSnapshot(element->name, false);
 			//clear(0, 0);
 			break;

 		case UI_TAPE_DETACH_TAP:
 			ted8360->tap->detachTape();
 			break;
 		case UI_TAPE_REWIND:
 			ted8360->tap->rewind();
 			break;
 		case UI_TAPE_STOP:
 			ted8360->tap->pressTapeButton(ted8360->GetClockCount(), 0);
 			break;
 		case UI_TAPE_PLAY:
 			ted8360->tap->pressTapeButton(ted8360->GetClockCount(), 1);
 			break;
 		case UI_FILE_LOAD_PRG:
 			show_file_list( &file_menu, UI_PRG_ITEM );
 			return false;
 		case UI_TAPE_ATTACH_TAP:
 			show_file_list( &tap_list, UI_TAP_ITEM );
 			return false;
 		case UI_CRT_ATTACH:
 			show_file_list(&crt_list, UI_CRT_ITEM);
 			return false;
 		case UI_CRT_DETACH:
 			ted8360->loadromfromfile(1, "", 0);
 			break;
 		case UI_FILE_LOAD_FRE:
 			show_file_list(&fre_list, UI_FRE_ITEM);
 			return false;
 		case UI_DRIVE_ATTACH_IMAGE:
 			show_file_list( &d64_list, UI_D64_ITEM );
 			//ted8360->HookTCBM(0);
 			return false;
 		case UI_DRIVE_DETACH_IMAGE:
 			if (CTrueDrive::GetRoot()) {
 				CTrueDrive *d = CTrueDrive::GetRoot();
 				d->DetachDisk();
 			}
 			machineEnable1551(true);
 			return true;
 		case UI_SNAPSHOT_LOAD:
 			show_file_list( &snapshot_menu, UI_FRE_ITEM );
 			return false;
 		case UI_EMULATOR_MONITOR:
 			monitorEnter(ted8360->cpuptr);
 			return true;
 		case UI_EMULATOR_RESUME:
 			void ();
 			return true;
 		case UI_EMULATOR_RESET:
 			machineReset(true);
 			return true;
 		case UI_EMULATOR_EXIT:
 			exit(1);
 			break;
 		default:
 			break;
 	}
 	return true;
 }

 void UI::show_title(menu_t * menu)
 {
 	const unsigned int CPR = ted8360->getCyclesPerRow() == 504 ? 580 : 456;

 	size_t titlen = strlen( menu->title ) << 3;
 	set_color( COLOR(8,7), COLOR(7,0) );
 	texttoscreen( (CPR - int(titlen))/2, 24, menu->title);

 	titlen = strlen( menu->subtitle );
 	set_color( COLOR(8,0), COLOR(1,5) );
 	int chunks = (int) titlen / (CPR / 8) + 1;
 	int startline = 40 - (chunks / 3) * 8;
 	char *subtitle = menu->subtitle;
 	do {
 		const int MAXLEN = 46;//55;
 		int chunklen = (int) (titlen > MAXLEN ? MAXLEN : titlen);
 		texttoscreen(CPR / 2 - int(chunklen) * 4, startline,
 			petstr2ascstr(subtitle), chunklen);
 		titlen -= MAXLEN;
 		subtitle += chunklen;
 		startline += 8;
 	} while (chunks--);

 	char helptxt[] = "Arrows: navigate, ENTER: select, ESC: resume";
 	texttoscreen( (CPR - int(strlen(helptxt)*8)) / 2 - 8, 312 - 32, petstr2ascstr(helptxt));
 	set_color( fgcol, bgcol );
 }

 void UI::show_menu(menu_t * menu)
 {
 	int i;
 	int shown = menu->nr_of_elements - menu->uppermost;

 	show_title(menu);
 	if (shown > 0) {
 		if (shown > MAX_LINES)
 			shown = MAX_LINES + 1;

 		for (i = 2; i < 16; i++) {
 			const char c = ' ';
 			const unsigned int offset = LISTOFFSET + 32 + i * 16;
 			bgcol = COLOR(i, 3);
 			chrtoscreen(offset, 312 - 24, c);
 			chrtoscreen(offset + 8, 312 - 24, c);
 		}

 		set_color( COLOR(0,0), COLOR(1,5) );
 		for (i = 0; i < shown; ++i) {
 			unsigned int ix = menu->uppermost + i;
 			element_t &elem = menu->element[ix];

 			if (elem.menufunction == UI_DIR_ITEM)
 				set_color( COLOR(2,1), COLOR(1,5) );
 			else
 				set_color( COLOR(0,0), COLOR(1,5) );
 			// display menu list element
 			texttoscreen(LISTOFFSET, 64+(i<<3), elem.name);

 			// if interactive menu, find out what to do
 			if (elem.menufunction == UI_MENUITEM_CALLBACKS) {
 				char valuetxt[256] = "";
 				unsigned int valuePos = LISTOFFSET + (43 << 3);
 				unsigned int valueTxtLen;

 				rvar_t *rv = findRVar(elem.name);
 				unsigned int type = (RvarTypes) elem.type;
 				switch (type) {
 					case RVAR_TOGGLE:
 						strcpy(valuetxt, *((unsigned int*)(rv->value)) ? "ON" : "OFF");
 						break;

 					case RVAR_INT:
 						sprintf(valuetxt, "%i", *((int*)(rv->value)));
 						break;

 					case RVAR_HEX:
 						sprintf(valuetxt, "$%04X", *((unsigned int*)(rv->value)));
 						break;

 					case RVAR_STRING_FLIPLIST:
 						if (rv->label)
 							sprintf(valuetxt, "%s", rv->label());
 						break;

 					default:;
 				}
 				valueTxtLen = (unsigned int) (strlen(valuetxt) << 3);
 				set_color(COLOR(2,1), COLOR(1,5));
 				texttoscreen(valuePos - valueTxtLen, 64 + (i << 3), valuetxt);
 			}
 		}
 	}
 	screen_update();
 }

 void UI::drawMenu()
 {
 	ad_get_curr_dir(tap_list.subtitle);
 	ad_get_curr_dir(file_menu.subtitle);
 	ad_get_curr_dir(d64_list.subtitle);
 	ad_get_curr_dir(fre_list.subtitle);
 	ad_get_curr_dir(crt_list.subtitle);

 	clear (1, 5);
 	show_menu( curr_menu);
 	show_sel_bar( curr_menu );
 }

 int UI::enterMenu()
 {
 	int retval;

 	drawMenu();
 	retval = wait_events();

 	clear (0, 0);
 	return retval;
 }

 void UI::menuMove(int direction)
 {
 	if ((direction == -1 && curr_menu->curr_sel > 0) ||
 		(direction == +1 && curr_menu->curr_sel < curr_menu->nr_of_elements - 1))
 	{
 		int step = 0;
 		const int limit = direction == -1 ? 0 : MAX_LINES;
 		hide_sel_bar( curr_menu);
 		// Step and skip menu separators
 		do {
 			step++;
 		} while (curr_menu->element[curr_menu->curr_sel + step * direction].menufunction
 			== UI_MENUITEM_SEPARATOR);
 		if (curr_menu->curr_line == limit) {
 			curr_menu->uppermost += direction;
 			clear (1, 5);
 			show_menu( curr_menu );
 		} else
 			curr_menu->curr_line += step * direction;
 		curr_menu->curr_sel += step * direction;
 		show_sel_bar( curr_menu);
 	}
 }

 int UI::menuEnter(bool forceAutoRun = false)
 {
 	element_t *elem;

 	if ( curr_menu->element[ curr_menu->curr_sel ].child ) {
 		elem = &(curr_menu->element[ curr_menu->curr_sel ]);
 		curr_menu = elem->child;
 	} else {
 		elem = &(curr_menu->element[ curr_menu->curr_sel ]);
 	}
 	// returns zero if we have to get back to the main loop, 1 otherwise
 	if ( handle_menu_command( elem ) ) {
 		clear (0, 0);
 		return 0;
 	} else {
 		clear (1, 5);
 		show_menu( curr_menu );
 		show_sel_bar( curr_menu);
 	}
 	return 1;
 }

 int UI::wait_events()
 {
 	SDL_Event event;

 #ifdef __EMSCRIPTEN__
 	while (SDL_PollEvent(&event)) {
 #else
 	while (SDL_WaitEvent(&event)) {
 #endif

 		switch (event.type) {

 			case SDL_WINDOWEVENT:
 				if (event.window.event == SDL_WINDOWEVENT_RESIZED
 					|| event.window.event == SDL_WINDOWEVENT_RESTORED) {
 					screen_update();
 				}
 				break;

 			case SDL_JOYAXISMOTION:
 				//printf("joy: %u, button: %u was pressed!\n", event.jaxis.which, event.jaxis.axis);
 				break;

 			case (Uint32)SDL_CONTROLLERBUTTONDOWN:
 			case SDL_JOYBUTTONDOWN:
 				//printf("joy: %u, button: %u was pressed!\n", event.jbutton.which, event.jbutton.button);
 				break;

 			case SDL_JOYBUTTONUP:
 				switch (event.jbutton.button) { // START button
 					case 10:
 						if (!menuEnter())
 							return 1;
 						break;
 					case 14:
 					case 12:
 					case 5:
 						return 0;
 					case 0:
 						menuMove(+1);
 						break;
 					case 1:
 						menuMove(-1);
 						break;
 					default:
 						//printf("joy: %u, button: %u was pressed!\n", event.jbutton.which, event.jbutton.button);
 						break;
 				}
 				break;

 	        case SDL_KEYDOWN:
 				//printf("key: %u, button was pressed!\n", event.key.keysym.scancode);
 				switch (event.key.keysym.sym) {
 					case SDLK_ESCAPE :
 					case SDLK_F8:
 					case SDLK_DELETE:
 						clear (0, 0);
 						return 1;

 					case SDLK_HOME:
 						hide_sel_bar( curr_menu);
 						clear (1, 5);
 						curr_menu->curr_sel = 0;
 						curr_menu->curr_line = 0;
 						curr_menu->uppermost = 0;
 						show_menu( curr_menu );
 						show_sel_bar( curr_menu);
 						break;
 					case SDLK_END:
 						break;
 					case SDLK_UP:
 						menuMove(-1);
 						break;
 					case SDLK_DOWN:
 						menuMove(+1);
 						break;
 					case SDLK_PAGEUP:
 						hide_sel_bar( curr_menu);
 						if (curr_menu->curr_line != 0 ) {
 							curr_menu->curr_sel = curr_menu->uppermost;
 							curr_menu->curr_line = 0;
 						} else {
 							curr_menu->curr_sel -= MAX_LINES;
 							if ( curr_menu->curr_sel < 0 )
 								curr_menu->curr_sel = 0;
 							curr_menu->uppermost = curr_menu->curr_sel;
 							clear (1, 5);
 							show_menu( curr_menu );
 						}
 						show_sel_bar( curr_menu);
 						break;
 					case SDLK_PAGEDOWN:
 						hide_sel_bar( curr_menu );
 						if (curr_menu->curr_line != MAX_LINES ) {
 							int nr_el = curr_menu->nr_of_elements - 1;
 							curr_menu->curr_sel = curr_menu->curr_line =
 								nr_el < MAX_LINES ? nr_el : MAX_LINES;
 						} else {
 							int nr_el = curr_menu->nr_of_elements - 1;
 							curr_menu->curr_sel += MAX_LINES;
 							if ( curr_menu->curr_sel > nr_el )
 								curr_menu->curr_sel = nr_el;
 							curr_menu->uppermost = curr_menu->curr_sel - MAX_LINES;
 							clear (1, 5);
 							show_menu( curr_menu );
 						}
 						show_sel_bar( curr_menu);
 						break;
 					case SDLK_LEFT:
 						if ( curr_menu->parent ) {
 							curr_menu = curr_menu->parent;
 							clear (1, 5);
 							show_menu( curr_menu );
 							show_sel_bar( curr_menu );
 						}
 						break;
 					case SDLK_RIGHT:
 					case SDLK_RETURN:
 						// return 1 if we get back to the main loop
 						if (!menuEnter())
 							return 1;
 						break;
 					default :
 						break;
 				};
 				break;
 			case SDL_QUIT:
 				//return 2;
 				exit(0);
 		}
 	}
 	return 0;
 }

 char UI::pet2asc(char c)
 {
 	if (c == '\\')
 		return char(0x4D|0x80);
 	if (c == 0x5F)
 		return char(0x6F|0x80);
 	/*if ((c >= 'A') && (c <= 'Z') || (c >= 'a') && (c <= 'z'))
 		return c ^ 0x20;*/
 	/*if ((c >= 0xc1) && (c <= 0xda))
 		return c ^ 0x80;*/

 	return c;
 }

 char *UI::petstr2ascstr(char *string)
 {
 	char *p = string;

 	while (*p) {
 		*p = pet2asc( *p );
 		p++;
 	}
 	return string;
 }

 unsigned char UI::asc2pet(char c)
 {
 	if ((c >= 'A') && (c <= 'Z'))
 		return c ;
 	if ((c >= 'a') && (c <= 'z'))
 		return c - 96;
 	if (c == '\\')
 		return 0x4D;
 	/*if ((c >= 0xc1) && (c <= 0xda))
 		return c ^ 0x80;*/
 	return c;
 }

 UI::~UI()
 {
 	delete []pixels;
 }

 void interfaceLoop(void *arg)
 {
 	UI *ui = (UI*) arg;

 	if (ui->wait_events()) {
 		setMainLoop(1);
 	}
 }
	/*
	YAPE - Yet Another Plus/4 Emulator

	The program emulates the Commodore 264 family of 8 bit microcomputers

	This program is free software, you are welcome to distribute it,
	and/or modify it under certain conditions. For more information,
	read 'Copying'.

	(c) 2000, 2001, 2005 Attila Grósz
	*/

	#include <string.h>
	#include <stdlib.h>
	#include <stdio.h>
	#include "types.h"
	#include "monitor.h"
	#include "tedmem.h"
	#include "interface.h"
	#include "archdep.h"
	#include "prg.h"
	#include "tape.h"
	#include "drive.h"
	#include "roms.h"
	#include "SaveState.h"

	#ifndef SDL_CONTROLLERBUTTONDOWN // Emscripten
	#define SDL_CONTROLLERBUTTONDOWN -1
	#endif

	extern bool autostart_file(const char *szFile, bool autostart = true);
	extern bool start_file(const char *szFile, bool autostart = true);
	extern bool openZipDisk(const char *fname, bool autostart);
	extern void machineDoSomeFrames(unsigned int frames);
	extern void machineEnable1551(bool enable);
	extern bool machineIsTrueDriveEnabled(unsigned int dn);
	extern void machineReset(bool hardreset);
	extern void setMainLoop(int looptype);

	#define COLOR(COL, SHADE) ((SHADE<<4)\|COL\|0x80)
	#define MAX_LINES 25
	#define MAX_INDEX (MAX_LINES - 1)
	#define LISTOFFSET (ted8360->getCyclesPerRow() == 456 ? 52 : 114)

	// TODO this is ugly and kludgy like hell but I don't have time for better
	static menu_t main_menu = {
	"Main menu",
	"",
	{
	{"Load PRG file...", 0, UI_FILE_LOAD_PRG },
	{"Attach disk image...", 0, UI_DRIVE_ATTACH_IMAGE },
	{"Detach disk image", 0, UI_DRIVE_DETACH_IMAGE },
	{ " ", 0, UI_MENUITEM_SEPARATOR },
	{"Emulator snapshot...", 0, UI_FILE_LOAD_FRE },
	{ " ", 0, UI_MENUITEM_SEPARATOR },
	{ "Attach rom...", 0, UI_CRT_ATTACH },
	{ "Detach rom...", 0, UI_CRT_DETACH },
	{ " ", 0, UI_MENUITEM_SEPARATOR },
	{"Tape controls...", 0, UI_MENUITEM_MENULINK },
	{" ", 0, UI_MENUITEM_SEPARATOR },
	{"Options..." , 0, UI_MENUITEM_MENULINK },
	{" ", 0, UI_MENUITEM_SEPARATOR },
	{"Enter monitor", 0, UI_EMULATOR_MONITOR },
	{"Resume emulation" , 0, UI_EMULATOR_RESUME },
	{ " ", 0, UI_MENUITEM_SEPARATOR },
	{"Reset emulator", 0, UI_EMULATOR_RESET },
	{ " ", 0, UI_MENUITEM_SEPARATOR },
	{"Quit YAPE" , 0, UI_EMULATOR_EXIT }
	},
	0,
	15,
	0,
	0,
	0
	};

	static menu_t tape_menu = {
	"Tape control menu",
	"",
	{
	{"Attach TAP image...", 0, UI_TAPE_ATTACH_TAP },
	{" ", 0, UI_MENUITEM_SEPARATOR },
	{"Create TAP image", 0, UI_TAPE_CREATE_TAP },
	{" ", 0, UI_MENUITEM_SEPARATOR },
	{"Detach TAP image", 0, UI_TAPE_DETACH_TAP },
	{" ", 0, UI_MENUITEM_SEPARATOR },
	{"Press PLAY" , 0, UI_TAPE_PLAY },
	{"Press RECORD" , 0, UI_TAPE_RECORD },
	{"Press STOP" , 0, UI_TAPE_STOP },
	{"Rewind tape" , 0, UI_TAPE_REWIND }
	},
	0,
	10,
	0,
	0,
	0
	};

	static menu_t snapshot_menu = {
	"Emulator snapshot menu",
	"",
	{
	{"Load snapshot...", 0, UI_SNAPSHOT_LOAD },
	{"Save quicksnapshot...", 0, UI_SNAPSHOT_QUICKSAVE }
	},
	0,
	2,
	0,
	0,
	0
	};

	static menu_t options_menu = {
	"Options menu",
	"",
	{
	{"Dummy", 0, UI_MENUITEM_MENULINK },
	},
	0,
	5,
	0,
	0,
	0
	};

	static menu_t file_menu;
	static menu_t tap_list;
	static menu_t d64_list;
	static menu_t fre_list;
	static menu_t crt_list;
	static unsigned int *pixels;
	extern void frameUpdate(unsigned char src, unsigned int target);

	static rvar_t findRVar(char name)
	{
	rvar_t **rv = settings;
	while (*rv) {
	rvar_t item = rv++;
	while (item && item->value) {
	if (!strcmp(name, item->menuName))
	return item;
	item++;
	}
	}
	return NULL;
	}

	UI::UI(class TED *ted) :
	display(ted->screen), charset(kernal + 0x1400), ted8360(ted)
	{
	pixels = new unsigned int[512 * 312 * 2];
	// Link menu structure
	main_menu.element[0].child = &file_menu;
	main_menu.element[1].child = &d64_list;
	main_menu.element[4].child = &fre_list;// snapshot_menu;
	main_menu.element[6].child = &crt_list;
	main_menu.element[9].child = &tape_menu;
	main_menu.element[11].child = &options_menu;
	tape_menu.element[0].child = &tap_list;

	curr_menu = &main_menu;
	strcpy(file_menu.title, "PRG file selection menu");
	strcpy(tape_menu.title, "Tape controls menu");
	strcpy(tap_list.title, "TAP image selection menu");
	strcpy(d64_list.title, "Disk image selection menu");
	strcpy(fre_list.title, "Emulator savestate selection menu");
	strcpy(crt_list.title, "Cartridge/ROM selection menu");
	file_menu.parent = curr_menu;
	options_menu.parent = curr_menu;
	tape_menu.parent = curr_menu;
	tap_list.parent = &tape_menu;
	d64_list.parent = curr_menu;
	//snapshot_menu.parent = curr_menu;
	fre_list.parent = curr_menu;
	crt_list.parent = curr_menu;

	// initialize settings menu
	unsigned int i = 0, j = 0;
	rvar_t **rv = settings;
	while (rv[i]) {
	rvar_t *item = rv[i++];
	while (item && item->value) { // FIXME
	strcpy(options_menu.element[j].name, item->menuName);
	options_menu.element[j].menufunction = UI_MENUITEM_CALLBACKS;
	options_menu.element[j].type = (UI_MenuTypes) item->type;
	item++;
	j++;
	}
	}
	options_menu.nr_of_elements = j;
	}

	void UI::screen_update()
	{
	const unsigned int cyclesPerRow = ted8360->getCyclesPerRow();
	const int offset = cyclesPerRow == 504 ? -68 : 8;

	frameUpdate(display + (cyclesPerRow - offset - 384) / 2 + 10 * cyclesPerRow, pixels);
	}

	void UI::clear(char color, char shade)
	{
	memset(display, COLOR(color, shade), 512 * SCR_VSIZE);
	screen_update();
	}

	void UI::set_color(unsigned char foreground, unsigned char background)
	{
	bgcol = background;
	fgcol = foreground;
	}

	void UI::texttoscreen(int x, int y, char *scrtxt, size_t len = 0)
	{
	int i = 0;

	if (!len) len = strlen(scrtxt);
	while (scrtxt[i] != 0 && len--) {
	chrtoscreen(x + i*8, y, asc2pet(scrtxt[i]));
	i++;
	}
	}

	void UI::chrtoscreen(int x,int y, char scrchr)
	{
	int j, k;
	unsigned char *cset;
	const unsigned int CPR = ted8360->getCyclesPerRow();

	cset = charset + (scrchr << 3);
	for (j = 0; j<8; j++)
	for (k = 0; k < 8; k++)
	display[(y + j) * CPR + x + k] = (cset[j] & (0x80 >> k)) ? fgcol : bgcol;
	}

	void UI::hide_sel_bar(menu_t *menu)
	{
	if ( menu->element[ menu->curr_sel ].menufunction == UI_DIR_ITEM)
	set_color( COLOR(2,1), COLOR(1,5) );
	else
	set_color( COLOR(0,0), COLOR(1,5) );
	texttoscreen(LISTOFFSET, 64 + (curr_menu->curr_line<<3),
	menu->element[ curr_menu->curr_sel ].name);
	screen_update();
	}

	void UI::show_sel_bar(menu_t * menu)
	{
	set_color( COLOR(0,0), COLOR(15,7) );
	texttoscreen(LISTOFFSET, 64 + (curr_menu->curr_line<<3),
	menu->element[ curr_menu->curr_sel ].name);
	screen_update();
	}

	void UI::show_settings_list(menu_t * menu, rvar_t *rvItems)
	{
	int nf = 0;
	menu->nr_of_elements = 0;
	rvar_t rvPtr = settings;

	while (rvPtr) {
	strcpy(menu->element[nf].name, rvPtr->menuName);
	menu->element[nf].child = 0;
	menu->element[nf].type = MENU_CALLBACK;
	nf++;
	rvPtr++;
	}
	menu->nr_of_elements = nf;
	}

	void UI::show_file_list(menu_t * menu, UI_MenuClass type)
	{
	int nf = 0, res;
	char cfilename[512];
	char *fileFoundName;
	UI_FileTypes ft;

	menu->nr_of_elements = 0;
	res = ad_find_first_file("*");
	fileFoundName = ad_return_current_filename();
	ft = ad_return_current_filetype();
	if (fileFoundName && !strcmp(fileFoundName, ".") )
	res = ad_find_next_file();
	if (!fileFoundName \|\| strcmp(fileFoundName, "..") /&& ft != UI_DRIVE_ITEM/) {
	strcpy( menu->element[nf++].name, "..");
	menu->element[0].menufunction = UI_DIR_ITEM;
	}
	while (res) {
	ft = ad_return_current_filetype();
	// fprintf(stderr,"Parsed: %s\n", ad_return_current_filename());
	if (ft != FT_FILE) {
	strcpy(menu->element[nf].name, ad_return_current_filename());
	menu->element[nf].menufunction = (ft == FT_DIR ? UI_DIR_ITEM : UI_DRIVE_ITEM);
	++nf;
	}
	res = ad_find_next_file();
	}
	ad_find_file_close();
	// populate file list
	if (ft != FT_VOLUME) {

	unsigned int nrOfExts = 1;
	element_t ftypes[10];

	switch ( type ) {
	case UI_T64_ITEM:
	case UI_PRG_ITEM:
	nrOfExts = 3;
	strcpy(ftypes[0].name, "*.prg");
	strcpy(ftypes[1].name, "*.P00");
	strcpy(ftypes[2].name, "*.T64");
	ftypes[0].menufunction = UI_PRG_ITEM;
	ftypes[1].menufunction = UI_PRG_ITEM;
	ftypes[2].menufunction = UI_T64_ITEM;
	break;
	case UI_TAP_ITEM:
	strcpy(ftypes[0].name, "*.tap");
	strcpy(ftypes[1].name, "*.wav");
	ftypes[0].menufunction = UI_TAP_ITEM;
	ftypes[1].menufunction = UI_TAP_ITEM;
	nrOfExts = 2;
	break;
	case UI_D64_ITEM:
	case UI_ZIP_ITEM:
	strcpy(ftypes[0].name, "*.d64");
	ftypes[0].menufunction = UI_D64_ITEM;
	strcpy(ftypes[1].name, "*.zip");
	ftypes[1].menufunction = UI_ZIP_ITEM;
	#ifdef WIN32
	nrOfExts = 2;
	#else
	nrOfExts = 3;
	strcpy(ftypes[2].name, "*.D64");
	ftypes[2].menufunction = UI_D64_ITEM;
	#endif
	break;
	case UI_FRE_ITEM:
	strcpy(ftypes[0].name, "*.yss");
	ftypes[0].menufunction = UI_FRE_ITEM;
	break;
	case UI_CRT_ITEM:
	strcpy(ftypes[0].name, "*.crt");
	strcpy(ftypes[1].name, "*.rom");
	ftypes[0].menufunction =
	ftypes[1].menufunction = UI_CRT_ITEM;
	nrOfExts = 2;
	break;
	case UI_DRIVE_SET_DIR:
	menu->nr_of_elements = nf;
	default:
	return;
	}
	//
	unsigned int k = nrOfExts - 1;
	do {
	strcpy(cfilename, ftypes[k].name);
	type = ftypes[k].menufunction;
	res = ad_find_first_file(cfilename);
	while(res) {
	strcpy(menu->element[nf].name, ad_return_current_filename());
	menu->element[nf].menufunction = type;
	++nf;
	res = ad_find_next_file();
	}
	ad_find_file_close();
	} while (k--);
	//
	}
	menu->nr_of_elements = nf;
	}

	void UI::openD64Item(const char *name)
	{
	machineEnable1551(false);
	if (CTrueDrive::GetRoot()) {
	CTrueDrive::SwapDisk(name);
	const Uint8 *state = SDL_GetKeyboardState(NULL);
	if (state[SDL_SCANCODE_LSHIFT] \|\| state[SDL_SCANCODE_RSHIFT]) {
	autostart_file(name);
	}
	}
	}

	bool UI::handle_menu_command( struct element_t *element)
	{
	int menuSelection;
	UI_MenuClass ptype = UI_MENUITEM_MENULINK;

	// FIXME this must be nicer
	if (!curr_menu->parent) {
	menuSelection = element->menufunction;
	} else {
	ptype = curr_menu->parent->element[ curr_menu->parent->curr_sel ].menufunction;
	menuSelection = element->menufunction;
	}

	switch ( menuSelection ) {

	case UI_MENUITEM_MENULINK:
	return false;

	case UI_MENUITEM_CALLBACKS:
	{ // find rvar and use callback
	rvar_t *rv = findRVar(element->name);
	if (rv) {
	switch (rv->type) {
	case RVAR_TOGGLE:
	// if callback specified, call it otherwise toggle ourselves
	if (rv->callback)
	(rv->callback)(NULL);
	else {
	int value = ((int)(rv->value));
	value = !value;
	}
	break;

	case RVAR_HEX:
	case RVAR_INT:
	if (rv->callback)
	(rv->callback)(NULL);
	break;

	case RVAR_STRING_FLIPLIST:
	if (rv->callback) {
	char text[64];
	(rv->callback)(text);
	}
	break;

	default:;
	}
	}
	}
	return false;

	case UI_DRIVE_ITEM:
	ad_exit_drive_selector();
	case UI_DIR_ITEM:
	if (ad_set_curr_dir(element->name)) {
	ad_get_curr_dir( (char*)&(curr_menu->subtitle) );
	if ( ptype == UI_FILE_LOAD_PRG )
	show_file_list( &file_menu, UI_PRG_ITEM );
	else if ( ptype == UI_TAPE_ATTACH_TAP )
	show_file_list( &tap_list, UI_TAP_ITEM );
	else if ( ptype == UI_DRIVE_ATTACH_IMAGE )
	show_file_list( &d64_list, UI_D64_ITEM );
	else if (ptype == UI_FILE_LOAD_FRE)
	show_file_list(&fre_list, UI_FRE_ITEM);
	else if (ptype == UI_CRT_ATTACH)
	show_file_list(&crt_list, UI_CRT_ITEM);
	curr_menu->curr_sel = 0;
	curr_menu->curr_line = 0;
	curr_menu->uppermost = 0;
	}
	/*if ( curr_menu->curr_sel >= file_menu.nr_of_elements )
	curr_menu->curr_sel = file_menu.nr_of_elements - 1;*/
	return false;

	case UI_T64_ITEM:
	case UI_PRG_ITEM:
	{
	const Uint8 *state = SDL_GetKeyboardState(NULL);
	if (state[SDL_SCANCODE_LSHIFT] \|\| state[SDL_SCANCODE_RSHIFT]) {
	autostart_file(element->name);
	} else {
	if (menuSelection != UI_T64_ITEM)
	PrgLoad(element->name, 0, ted8360);
	else
	prgLoadFromT64(element->name, 0, ted8360);
	}
	}
	clear (0, 0);
	break;

	case UI_TAP_ITEM:
	{
	const Uint8 *state = SDL_GetKeyboardState(NULL);
	if (state[SDL_SCANCODE_LSHIFT] \|\| state[SDL_SCANCODE_RSHIFT]) {
	autostart_file(element->name);
	} else
	ted8360->tap->attachTape(element->name);
	}
	break;
	case UI_D64_ITEM:
	openD64Item(element->name);
	break;
	case UI_ZIP_ITEM:
	start_file(element->name, true);
	break;
	case UI_CRT_ITEM:
	ted8360->loadromfromfile(1, element->name, 0);
	break;
	case UI_FRE_ITEM:
	SaveState::openSnapshot(element->name, false);
	//clear(0, 0);
	break;

	case UI_TAPE_DETACH_TAP:
	ted8360->tap->detachTape();
	break;
	case UI_TAPE_REWIND:
	ted8360->tap->rewind();
	break;
	case UI_TAPE_STOP:
	ted8360->tap->pressTapeButton(ted8360->GetClockCount(), 0);
	break;
	case UI_TAPE_PLAY:
	ted8360->tap->pressTapeButton(ted8360->GetClockCount(), 1);
	break;
	case UI_FILE_LOAD_PRG:
	show_file_list( &file_menu, UI_PRG_ITEM );
	return false;
	case UI_TAPE_ATTACH_TAP:
	show_file_list( &tap_list, UI_TAP_ITEM );
	return false;
	case UI_CRT_ATTACH:
	show_file_list(&crt_list, UI_CRT_ITEM);
	return false;
	case UI_CRT_DETACH:
	ted8360->loadromfromfile(1, "", 0);
	break;
	case UI_FILE_LOAD_FRE:
	show_file_list(&fre_list, UI_FRE_ITEM);
	return false;
	case UI_DRIVE_ATTACH_IMAGE:
	show_file_list( &d64_list, UI_D64_ITEM );
	//ted8360->HookTCBM(0);
	return false;
	case UI_DRIVE_DETACH_IMAGE:
	if (CTrueDrive::GetRoot()) {
	CTrueDrive *d = CTrueDrive::GetRoot();
	d->DetachDisk();
	}
	machineEnable1551(true);
	return true;
	case UI_SNAPSHOT_LOAD:
	show_file_list( &snapshot_menu, UI_FRE_ITEM );
	return false;
	case UI_EMULATOR_MONITOR:
	monitorEnter(ted8360->cpuptr);
	return true;
	case UI_EMULATOR_RESUME:
	void ();
	return true;
	case UI_EMULATOR_RESET:
	machineReset(true);
	return true;
	case UI_EMULATOR_EXIT:
	exit(1);
	break;
	default:
	break;
	}
	return true;
	}

	void UI::show_title(menu_t * menu)
	{
	const unsigned int CPR = ted8360->getCyclesPerRow() == 504 ? 580 : 456;

	size_t titlen = strlen( menu->title ) << 3;
	set_color( COLOR(8,7), COLOR(7,0) );
	texttoscreen( (CPR - int(titlen))/2, 24, menu->title);

	titlen = strlen( menu->subtitle );
	set_color( COLOR(8,0), COLOR(1,5) );
	int chunks = (int) titlen / (CPR / 8) + 1;
	int startline = 40 - (chunks / 3) * 8;
	char *subtitle = menu->subtitle;
	do {
	const int MAXLEN = 46;//55;
	int chunklen = (int) (titlen > MAXLEN ? MAXLEN : titlen);
	texttoscreen(CPR / 2 - int(chunklen) * 4, startline,
	petstr2ascstr(subtitle), chunklen);
	titlen -= MAXLEN;
	subtitle += chunklen;
	startline += 8;
	} while (chunks--);

	char helptxt[] = "Arrows: navigate, ENTER: select, ESC: resume";
	texttoscreen( (CPR - int(strlen(helptxt)*8)) / 2 - 8, 312 - 32, petstr2ascstr(helptxt));
	set_color( fgcol, bgcol );
	}

	void UI::show_menu(menu_t * menu)
	{
	int i;
	int shown = menu->nr_of_elements - menu->uppermost;

	show_title(menu);
	if (shown > 0) {
	if (shown > MAX_LINES)
	shown = MAX_LINES + 1;

	for (i = 2; i < 16; i++) {
	const char c = ' ';
	const unsigned int offset = LISTOFFSET + 32 + i * 16;
	bgcol = COLOR(i, 3);
	chrtoscreen(offset, 312 - 24, c);
	chrtoscreen(offset + 8, 312 - 24, c);
	}

	set_color( COLOR(0,0), COLOR(1,5) );
	for (i = 0; i < shown; ++i) {
	unsigned int ix = menu->uppermost + i;
	element_t &elem = menu->element[ix];

	if (elem.menufunction == UI_DIR_ITEM)
	set_color( COLOR(2,1), COLOR(1,5) );
	else
	set_color( COLOR(0,0), COLOR(1,5) );
	// display menu list element
	texttoscreen(LISTOFFSET, 64+(i<<3), elem.name);

	// if interactive menu, find out what to do
	if (elem.menufunction == UI_MENUITEM_CALLBACKS) {
	char valuetxt[256] = "";
	unsigned int valuePos = LISTOFFSET + (43 << 3);
	unsigned int valueTxtLen;

	rvar_t *rv = findRVar(elem.name);
	unsigned int type = (RvarTypes) elem.type;
	switch (type) {
	case RVAR_TOGGLE:
	strcpy(valuetxt, ((unsigned int)(rv->value)) ? "ON" : "OFF");
	break;

	case RVAR_INT:
	sprintf(valuetxt, "%i", ((int)(rv->value)));
	break;

	case RVAR_HEX:
	sprintf(valuetxt, "$%04X", ((unsigned int)(rv->value)));
	break;

	case RVAR_STRING_FLIPLIST:
	if (rv->label)
	sprintf(valuetxt, "%s", rv->label());
	break;

	default:;
	}
	valueTxtLen = (unsigned int) (strlen(valuetxt) << 3);
	set_color(COLOR(2,1), COLOR(1,5));
	texttoscreen(valuePos - valueTxtLen, 64 + (i << 3), valuetxt);
	}
	}
	}
	screen_update();
	}

	void UI::drawMenu()
	{
	ad_get_curr_dir(tap_list.subtitle);
	ad_get_curr_dir(file_menu.subtitle);
	ad_get_curr_dir(d64_list.subtitle);
	ad_get_curr_dir(fre_list.subtitle);
	ad_get_curr_dir(crt_list.subtitle);

	clear (1, 5);
	show_menu( curr_menu);
	show_sel_bar( curr_menu );
	}

	int UI::enterMenu()
	{
	int retval;

	drawMenu();
	retval = wait_events();

	clear (0, 0);
	return retval;
	}

	void UI::menuMove(int direction)
	{
	if ((direction == -1 && curr_menu->curr_sel > 0) \|\|
	(direction == +1 && curr_menu->curr_sel < curr_menu->nr_of_elements - 1))
	{
	int step = 0;
	const int limit = direction == -1 ? 0 : MAX_LINES;
	hide_sel_bar( curr_menu);
	// Step and skip menu separators
	do {
	step++;
	} while (curr_menu->element[curr_menu->curr_sel + step * direction].menufunction
	== UI_MENUITEM_SEPARATOR);
	if (curr_menu->curr_line == limit) {
	curr_menu->uppermost += direction;
	clear (1, 5);
	show_menu( curr_menu );
	} else
	curr_menu->curr_line += step * direction;
	curr_menu->curr_sel += step * direction;
	show_sel_bar( curr_menu);
	}
	}

	int UI::menuEnter(bool forceAutoRun = false)
	{
	element_t *elem;

	if ( curr_menu->element[ curr_menu->curr_sel ].child ) {
	elem = &(curr_menu->element[ curr_menu->curr_sel ]);
	curr_menu = elem->child;
	} else {
	elem = &(curr_menu->element[ curr_menu->curr_sel ]);
	}
	// returns zero if we have to get back to the main loop, 1 otherwise
	if ( handle_menu_command( elem ) ) {
	clear (0, 0);
	return 0;
	} else {
	clear (1, 5);
	show_menu( curr_menu );
	show_sel_bar( curr_menu);
	}
	return 1;
	}

	int UI::wait_events()
	{
	SDL_Event event;

	#ifdef __EMSCRIPTEN__
	while (SDL_PollEvent(&event)) {
	#else
	while (SDL_WaitEvent(&event)) {
	#endif

	switch (event.type) {

	case SDL_WINDOWEVENT:
	if (event.window.event == SDL_WINDOWEVENT_RESIZED
	\|\| event.window.event == SDL_WINDOWEVENT_RESTORED) {
	screen_update();
	}
	break;

	case SDL_JOYAXISMOTION:
	//printf("joy: %u, button: %u was pressed!\n", event.jaxis.which, event.jaxis.axis);
	break;

	case (Uint32)SDL_CONTROLLERBUTTONDOWN:
	case SDL_JOYBUTTONDOWN:
	//printf("joy: %u, button: %u was pressed!\n", event.jbutton.which, event.jbutton.button);
	break;

	case SDL_JOYBUTTONUP:
	switch (event.jbutton.button) { // START button
	case 10:
	if (!menuEnter())
	return 1;
	break;
	case 14:
	case 12:
	case 5:
	return 0;
	case 0:
	menuMove(+1);
	break;
	case 1:
	menuMove(-1);
	break;
	default:
	//printf("joy: %u, button: %u was pressed!\n", event.jbutton.which, event.jbutton.button);
	break;
	}
	break;

	case SDL_KEYDOWN:
	//printf("key: %u, button was pressed!\n", event.key.keysym.scancode);
	switch (event.key.keysym.sym) {
	case SDLK_ESCAPE :
	case SDLK_F8:
	case SDLK_DELETE:
	clear (0, 0);
	return 1;

	case SDLK_HOME:
	hide_sel_bar( curr_menu);
	clear (1, 5);
	curr_menu->curr_sel = 0;
	curr_menu->curr_line = 0;
	curr_menu->uppermost = 0;
	show_menu( curr_menu );
	show_sel_bar( curr_menu);
	break;
	case SDLK_END:
	break;
	case SDLK_UP:
	menuMove(-1);
	break;
	case SDLK_DOWN:
	menuMove(+1);
	break;
	case SDLK_PAGEUP:
	hide_sel_bar( curr_menu);
	if (curr_menu->curr_line != 0 ) {
	curr_menu->curr_sel = curr_menu->uppermost;
	curr_menu->curr_line = 0;
	} else {
	curr_menu->curr_sel -= MAX_LINES;
	if ( curr_menu->curr_sel < 0 )
	curr_menu->curr_sel = 0;
	curr_menu->uppermost = curr_menu->curr_sel;
	clear (1, 5);
	show_menu( curr_menu );
	}
	show_sel_bar( curr_menu);
	break;
	case SDLK_PAGEDOWN:
	hide_sel_bar( curr_menu );
	if (curr_menu->curr_line != MAX_LINES ) {
	int nr_el = curr_menu->nr_of_elements - 1;
	curr_menu->curr_sel = curr_menu->curr_line =
	nr_el < MAX_LINES ? nr_el : MAX_LINES;
	} else {
	int nr_el = curr_menu->nr_of_elements - 1;
	curr_menu->curr_sel += MAX_LINES;
	if ( curr_menu->curr_sel > nr_el )
	curr_menu->curr_sel = nr_el;
	curr_menu->uppermost = curr_menu->curr_sel - MAX_LINES;
	clear (1, 5);
	show_menu( curr_menu );
	}
	show_sel_bar( curr_menu);
	break;
	case SDLK_LEFT:
	if ( curr_menu->parent ) {
	curr_menu = curr_menu->parent;
	clear (1, 5);
	show_menu( curr_menu );
	show_sel_bar( curr_menu );
	}
	break;
	case SDLK_RIGHT:
	case SDLK_RETURN:
	// return 1 if we get back to the main loop
	if (!menuEnter())
	return 1;
	break;
	default :
	break;
	};
	break;
	case SDL_QUIT:
	//return 2;
	exit(0);
	}
	}
	return 0;
	}

	char UI::pet2asc(char c)
	{
	if (c == '\\')
	return char(0x4D\|0x80);
	if (c == 0x5F)
	return char(0x6F\|0x80);
	/*if ((c >= 'A') && (c <= 'Z') \|\| (c >= 'a') && (c <= 'z'))
	return c ^ 0x20;*/
	/*if ((c >= 0xc1) && (c <= 0xda))
	return c ^ 0x80;*/

	return c;
	}

	char UI::petstr2ascstr(char string)
	{
	char *p = string;

	while (*p) {
	p = pet2asc( p );
	p++;
	}
	return string;
	}

	unsigned char UI::asc2pet(char c)
	{
	if ((c >= 'A') && (c <= 'Z'))
	return c ;
	if ((c >= 'a') && (c <= 'z'))
	return c - 96;
	if (c == '\\')
	return 0x4D;
	/*if ((c >= 0xc1) && (c <= 0xda))
	return c ^ 0x80;*/
	return c;
	}

	UI::~UI()
	{
	delete []pixels;
	}

	void interfaceLoop(void *arg)
	{
	UI ui = (UI) arg;

	if (ui->wait_events()) {
	setMainLoop(1);
	}
	}