Convert the main menu screen to lua lol

lib/luavgl/simulator/widgets/extension.c

@@ -0,0 +1,69 @@
+#include <lauxlib.h>
+#include <lua.h>
+
+#include <lvgl.h>
+#include <stdlib.h>
+
+#include <luavgl.h>
+
+static int luavgl_extension_create(lua_State *L)
+{
+  return luavgl_obj_create_helper(L, lv_obj_create);
+}
+
+/* clang-format off */
+static const luavgl_value_setter_t extension_property_table[] = {
+    {"dummy", SETTER_TYPE_STACK, {.setter_stack = _lv_dummy_set}},
+};
+/* clang-format on */
+
+static int luavgl_extension_set_property_kv(lua_State *L, void *data)
+{
+  lv_obj_t *obj = data;
+  int ret = luavgl_set_property(L, obj, extension_property_table);
+
+  if (ret == 0) {
+    return 0;
+  }
+
+  /* a base obj property? */
+  ret = luavgl_obj_set_property_kv(L, obj);
+  if (ret != 0) {
+    printf("unkown property for extension.\n");
+  }
+
+  return ret;
+}
+
+static int luavgl_extension_set(lua_State *L)
+{
+  lv_obj_t *obj = luavgl_to_obj(L, 1);
+
+  if (!lua_istable(L, -1)) {
+    luaL_error(L, "expect a table on 2nd para.");
+    return 0;
+  }
+
+  luavgl_iterate(L, -1, luavgl_extension_set_property_kv, obj);
+
+  return 0;
+}
+
+static const luaL_Reg luavgl_extension_methods[] = {
+    {"set", luavgl_extension_set},
+
+    {NULL, NULL},
+};
+
+void luavgl_extension_init(lua_State *L)
+{
+  luavgl_obj_newmetatable(L, &lv_btn_class, "lv_extension",
+                        luavgl_extension_methods);
+  lua_pop(L, 1);
+
+  luaL_getmetatable(L, "widgets");
+  lua_getfield(L, -1, "__index");
+  lua_pushcfunction(L, luavgl_extension_create);
+  lua_setfield(L, -2, "Extension");
+  lua_pop(L, 2);
+}