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Bug: prevent from switching to initial gamestate

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This commit is contained in:
Matthias Richter 2010-08-13 15:36:12 +02:00
parent 5030f4db60
commit 6315155955
1 changed files with 3 additions and 5 deletions
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8
gamestate.lua
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@ -1,10 +1,11 @@
Gamestate = {}
local function __NULL__() end
-- default gamestate produces error on every callback
local function __ERROR__() error("Gamestate not initialized. Use Gamestate.switch()") end
Gamestate.current = {
enter = __ERROR__,
leave = __ERROR__,
leave = __NULL__,
update = __ERROR__,
draw = __ERROR__,
keyreleased = __ERROR__,
@ -12,7 +13,6 @@ Gamestate.current = {
mousereleased = __ERROR__,
}
local function __NULL__() end
function Gamestate.new()
return {
enter = __NULL__,
@ -27,9 +27,7 @@ end
function Gamestate.switch(to, ...)
if not to then return end
if Gamestate.current then
Gamestate.current:leave()
end
Gamestate.current:leave()
local pre = Gamestate.current
Gamestate.current = to
Gamestate.current:enter(pre, ...)