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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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6
gamestate.lua
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@ -1,10 +1,11 @@
Gamestate = {} Gamestate = {}
local function __NULL__() end
-- default gamestate produces error on every callback -- default gamestate produces error on every callback
local function __ERROR__() error("Gamestate not initialized. Use Gamestate.switch()") end local function __ERROR__() error("Gamestate not initialized. Use Gamestate.switch()") end
Gamestate.current = { Gamestate.current = {
enter = __ERROR__, enter = __ERROR__,
leave = __ERROR__, leave = __NULL__,
update = __ERROR__, update = __ERROR__,
draw = __ERROR__, draw = __ERROR__,
keyreleased = __ERROR__, keyreleased = __ERROR__,
@ -12,7 +13,6 @@ Gamestate.current = {
mousereleased = __ERROR__, mousereleased = __ERROR__,
} }
local function __NULL__() end
function Gamestate.new() function Gamestate.new()
return { return {
enter = __NULL__, enter = __NULL__,
@ -27,9 +27,7 @@ end
function Gamestate.switch(to, ...) function Gamestate.switch(to, ...)
if not to then return end if not to then return end
if Gamestate.current then
Gamestate.current:leave() Gamestate.current:leave()
end
local pre = Gamestate.current local pre = Gamestate.current
Gamestate.current = to Gamestate.current = to
Gamestate.current:enter(pre, ...) Gamestate.current:enter(pre, ...)