Standardized demos a bit.

C/test.c

@@ -7,10 +7,16 @@ int main(void)
     if (!bt) return 1;
     int done = 0;
     int x = 0, y = 0;
-    int i = 0;
     while (!done) {
+        const char *title = "BTUI C Demo";
+        btui_set_attributes(bt, BTUI_FG_BLUE | BTUI_BOLD);
+        btui_move_cursor(bt, (bt->width - (int)strlen(title)) / 2, 0);
+        btui_printf(bt, "%s", title);
+
+        btui_set_attributes(bt, BTUI_FG_NORMAL | BTUI_FAINT);
         btui_move_cursor(bt, 0, bt->height-1);
-        btui_printf(bt, "Update %d, size = %dx%d", i++, bt->width, bt->height);
+        btui_printf(bt, "Size = %dx%d", bt->width, bt->height);
+        btui_set_attributes(bt, BTUI_NORMAL);
         btui_flush(bt);
 
         int mouse_x = -1, mouse_y = -1;
@@ -33,9 +39,9 @@ int main(void)
                 char buf[256] = {0};
                 btui_keyname(key, buf);
                 btui_move_cursor(bt, x, y);
-                //btui_set_attributes(bt, BTUI_FG_YELLOW | BTUI_BOLD);
+                btui_set_bg_hex(bt, 0xacff40);
-                btui_set_fg_hex(bt, 0xacff40);
+                btui_set_attributes(bt, BTUI_FG_BLACK);
-                btui_printf(bt, "Pressed: %s", buf);
+                btui_printf(bt, " Pressed: %s ", buf);
                 btui_set_attributes(bt, BTUI_NORMAL);
                 fflush(bt->out);
                 break;

Lua/lbtui.c

@@ -94,6 +94,49 @@ static int Lbtui_move(lua_State *L)
     return 0;
 }
 
+static int Lbtui_withfg(lua_State *L)
+{
+    btui_t **bt = (btui_t**)lua_touserdata(L, 1);
+    if (bt == NULL) luaL_error(L, "Not a BTUI object");
+    if (lua_gettop(L) < 5) luaL_error(L, "Expected r,g,b values and a function");
+    int isnum;
+    int r = lua_tointegerx(L, 2, &isnum);
+    if (!isnum) luaL_error(L, "Expected integer r value");
+    int g = lua_tointegerx(L, 3, &isnum);
+    if (!isnum) luaL_error(L, "Expected integer g value");
+    int b = lua_tointegerx(L, 4, &isnum);
+    if (!isnum) luaL_error(L, "Expected integer b value");
+    btui_set_fg_rgb(*bt, r, g, b);
+    int top = lua_gettop(L);
+    int status = lua_pcall(L, 0, LUA_MULTRET, 0);
+    btui_set_attributes(*bt, BTUI_FG_NORMAL);
+    if (status != LUA_OK)
+        lua_error(L);
+    return lua_gettop(L) - top;
+}
+
+static int Lbtui_withbg(lua_State *L)
+{
+    btui_t **bt = (btui_t**)lua_touserdata(L, 1);
+    if (bt == NULL) luaL_error(L, "Not a BTUI object");
+    if (lua_gettop(L) < 5) luaL_error(L, "Expected r,g,b values and a function");
+    int isnum;
+    int r = lua_tointegerx(L, 2, &isnum);
+    if (!isnum) luaL_error(L, "Expected integer r value");
+    int g = lua_tointegerx(L, 3, &isnum);
+    if (!isnum) luaL_error(L, "Expected integer g value");
+    int b = lua_tointegerx(L, 4, &isnum);
+    if (!isnum) luaL_error(L, "Expected integer b value");
+    btui_set_bg_rgb(*bt, r, g, b);
+    int top = lua_gettop(L);
+    int status = lua_pcall(L, 0, LUA_MULTRET, 0);
+    btui_set_attributes(*bt, BTUI_BG_NORMAL);
+    if (status != LUA_OK)
+        lua_error(L);
+    return lua_gettop(L) - top;
+}
+
+
 static int Lbtui_width(lua_State *L)
 {
     btui_t **bt = (btui_t**)lua_touserdata(L, 1);
@@ -141,6 +184,8 @@ static const luaL_Reg Rclass_metamethods[] =
     { "print",      Lbtui_print},
     { "clear",      Lbtui_clear},
     { "move",       Lbtui_move},
+    { "withfg",     Lbtui_withfg},
+    { "withbg",     Lbtui_withbg},
     { "width",      Lbtui_width},
     { "height",     Lbtui_height},
     { NULL,         NULL}

Lua/test.lua

@@ -6,8 +6,19 @@ btui(function(bt)
     while key ~= "q" and key ~= "Ctrl-c" do
         bt:clear()
         bt:move(x, y)
-        bt:print("Pressed: ", key)
+        bt:withbg(150,225,80, function()
+            bt:withfg(0,0,0, function()
+                bt:print(" Pressed: ", key, " ")
+            end)
+        end)
         if key == "e" then error("ERR MESSAGE") end
+
+        local title = "Lua BTUI Demo"
+        bt:withfg(100,200,255, function()
+            bt:move(math.floor((bt:width()-#title)/2), 0)
+            bt:print(title)
+        end)
+
         local s = ("Size: (%dx%d)"):format(bt:width(), bt:height())
         bt:move(bt:width()-#s, bt:height()-1)
         bt:print(s)

btui.h

@@ -57,7 +57,7 @@ static btui_t current_bt;
 #define T_OFF(opt) "\033[?" opt "l"
 
 static const char *TUI_ENTER = T_OFF(T_SHOW_CURSOR ";" T_WRAP)  T_ON(T_ALT_SCREEN ";" T_MOUSE_XY ";" T_MOUSE_CELL ";" T_MOUSE_SGR);
-static const char *TUI_LEAVE =  T_ON(T_SHOW_CURSOR ";" T_WRAP) T_OFF(T_ALT_SCREEN ";" T_MOUSE_XY ";" T_MOUSE_CELL ";" T_MOUSE_SGR);
+static const char *TUI_LEAVE =  T_ON(T_SHOW_CURSOR ";" T_WRAP) T_OFF(T_ALT_SCREEN ";" T_MOUSE_XY ";" T_MOUSE_CELL ";" T_MOUSE_SGR) "\033[0m";
 
 // Maximum time in milliseconds between double clicks
 #ifndef DOUBLECLICK_THRESHOLD
@@ -534,7 +534,7 @@ const unsigned long BTUI_FG_MAGENTA           = 1ul << 35;
 const unsigned long BTUI_FG_CYAN              = 1ul << 36;
 const unsigned long BTUI_FG_WHITE             = 1ul << 37;
 // 38: 256/24bit color
-const unsigned long BTUI_NO_FG                = 1ul << 39;
+const unsigned long BTUI_FG_NORMAL            = 1ul << 39;
 const unsigned long BTUI_BG_BLACK             = 1ul << 40;
 const unsigned long BTUI_BG_RED               = 1ul << 41;
 const unsigned long BTUI_BG_GREEN             = 1ul << 42;
@@ -544,7 +544,7 @@ const unsigned long BTUI_BG_MAGENTA           = 1ul << 45;
 const unsigned long BTUI_BG_CYAN              = 1ul << 46;
 const unsigned long BTUI_BG_WHITE             = 1ul << 47;
 // 48: 256/24bit color
-const unsigned long BTUI_NO_BG                = 1ul << 49;
+const unsigned long BTUI_BG_NORMAL            = 1ul << 49;
 const unsigned long BTUI_FRAMED               = 1ul << 51;
 const unsigned long BTUI_ENCIRCLED            = 1ul << 52;
 const unsigned long BTUI_OVERLINED            = 1ul << 53;