int main(int argc, char * argv[]) {
int ret = tb_init();
if(ret) {
fprintf(stderr, "tb_init() failed with error code %d\n", ret);
return 1;
}
draw();
// event loop
struct tb_event event;
while(tb_poll_event(&event)) {
switch(event.type) {
case TB_EVENT_KEY:
if(event.key == TB_KEY_ESC){
goto done;
}
break;
case TB_EVENT_RESIZE:
break;
}
}
done:
tb_shutdown();
return 0;
}
char Window::wait_for_input() {
// Blocks until keypress
tb_poll_event(&input);
switch (input.key) {
case TB_KEY_BACKSPACE2:
return '\b';
case TB_KEY_ENTER:
return '\n';
case TB_KEY_SPACE:
return ' ';
case TB_KEY_TAB:
return '\t';
}
char c;
tb_utf8_unicode_to_char(&c, input.ch);
return c;
}
int main(int argv, char **argc) {
int code = tb_init();
if (code < 0) {
fprintf(stderr, "termbox init failed, code: %d\n", code);
return -1;
}
tb_select_input_mode(TB_INPUT_ESC | TB_INPUT_MOUSE);
int w = tb_width();
int h = tb_height();
reallocBackBuffer(w, h);
updateAndRedrawAll(-1, -1);
for (;;) {
struct tb_event ev;
int mx = -1;
int my = -1;
int t = tb_poll_event(&ev);
if (t == -1) {
tb_shutdown();
fprintf(stderr, "termbox poll event error\n");
return -1;
}
switch (t) {
case TB_EVENT_KEY:
if (ev.key == TB_KEY_ESC) {
tb_shutdown();
return 0;
}
break;
case TB_EVENT_MOUSE:
if (ev.key == TB_KEY_MOUSE_LEFT) {
mx = ev.x;
my = ev.y;
}
break;
case TB_EVENT_RESIZE:
reallocBackBuffer(ev.w, ev.h);
break;
}
updateAndRedrawAll(mx, my);
}
}
static int lua_tb_peek_event( lua_State *L ) {
int event_type = 0;
struct luabox_State *lbstate;
struct tb_event *event_struct;
lua_pushlightuserdata( L, L );
lua_gettable( L, LUA_REGISTRYINDEX );
lbstate = lua_touserdata( L, -1 );
event_struct = &lbstate->event;
if ( lua_isnumber( L, 1 ) ) {
event_type = tb_peek_event( event_struct, (int) lua_tonumber( L, 1 ));
} else {
event_type = tb_poll_event( event_struct );
}
switch ( event_type ) {
LUABOX_CALL( TB_EVENT_KEY )
if ( event_struct->ch ) {
char buffer[8] = {0};
tb_utf8_unicode_to_char( buffer, event_struct->ch );
lua_pushstring( L, buffer );
lua_pushnumber( L, event_struct->ch );
} else {
lua_pushstring( L, "" );
lua_pushnumber( L, event_struct->key );
}
lua_pushnumber( L, event_struct->mod );
LUABOX_RETURN( TB_EVENT_KEY, 3, 0 )
LUABOX_CALL( TB_EVENT_RESIZE )
lua_pushnumber( L, event_struct->w );
lua_pushnumber( L, event_struct->h );
LUABOX_RETURN( TB_EVENT_RESIZE, 2, 0 )
LUABOX_CALL( TB_EVENT_MOUSE )
lua_pushnumber( L, event_struct->x );
lua_pushnumber( L, event_struct->y );
lua_pushnumber( L, event_struct->key );
LUABOX_RETURN( TB_EVENT_MOUSE, 3, 0 )
}
return 0;
}
CAMLprim value tbstub_poll_event() {
CAMLparam0();
CAMLlocal3(caml_e, caml_ch, caml_size);
struct tb_event e;
tb_poll_event(&e);
// type event =
// | Key of key -> block with tag 0
// | Ascii of char -> block with tag 1
// | Utf8 of int32 -> block with tag 2
// | Resize of int * int -> block with tag 3
if( e.type == TB_EVENT_KEY ) {
// Key
//
// We deviate from tb_event definition of key here.
// Some keys are really low enough to be considered ascii values.
//
// tb_poll_event reports ch as 0 whenever a 'key' is present.
if( e.ch == 0 && e.key > 0xFF ) {
caml_e = caml_alloc(1, 0);
// We use a bit of a trick here to convert e.key to
// type key =
// | F1 -> Val_int(0)
// ...
// | Arrow_right -> Val_int(21)
//
// All (non-ascii) TB_KEY_* values are defined as (0xFFFF-0)(F1)...(0xFFFF-21)(ARROW_RIGHT).
// Notice the pattern -> ^ ^
//
// By "restoring" that offset number we get the int value that we need to represent the variant.
Store_field(caml_e, 0, Val_int(0xFFFF - e.key));
}
// Ascii
//
// tb_poll_event reports key as 0 whenever a ch is present.
else if( e.ch <= 0xFF ) {
caml_e = caml_alloc(1, 1);
// Another bit of tricky code.
// At this point, we know that either e.key < 255 && e.ch = 0
// or e.key = 0 && e.ch < 255
// So we just bitwise or the two values to get our ascii value.
Store_field(caml_e, 0, Val_int(e.ch | e.key));
}
// Utf8
else {
// All else failed, so we need to represent the ch value as an int32 block,
// since OCaml has no unicode support.
caml_e = caml_alloc(1, 2);
caml_ch = caml_copy_int32(e.ch);
Store_field(caml_e, 0, caml_ch);
}
}
// Resize
else {
caml_size = caml_alloc_tuple(2);
Store_field(caml_size, 0, Val_int(e.w));
Store_field(caml_size, 1, Val_int(e.h));
caml_e = caml_alloc(1, 3);
Store_field(caml_e, 0, caml_size);
}
CAMLreturn(caml_e);
}
