Event callbacks
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- Subject: Event callbacks
- From: Jose Marin <jose_marin2@...>
- Date: 2009年6月25日 04:26:55 -0700 (PDT)
Hi.
What's the best approach to use callbacks in Lua?
For example, when the user clicks a mouse button, the Lua function 'mousebutton' must be called.
One simple way of doing this is (syntax checking is off) :
lua_pushstring(L, "mousebutton");
lua_rawget(L, -1); // I will check the correct value
if(lua_type(L, -1) == LUA_TFUNCTION )
{
lua_pushinteger(L, ev.x);
lua_pushinteger(L, ev.y);
lua_pushinteger(L, ev.button);
lua_call(L, 3, 0);
}
lua_pop(L, 0);
But would be nice if I stored the reference to the 'mousebutton' in C code to be called later, avoiding the 'lua_rawget' .
I have not used Lua for a while, so I don't know if there is a more efficient way of doing this.
How do you handle events in your game?
Thanks
Jose
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