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Added State Change Callback Functions

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Each state now has an OnOpen and OnClose callback function. These are available to be set by the client but not required. If not set, they will be ignored.
This commit is contained in:
Centauri Soldier 2021-04-07 12:52:43 -07:00
parent eae3c6edbe
commit 5e86bbb0b6
1 changed files with 91 additions and 35 deletions
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62
loveframes/libraries/utils.lua
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@ -5,18 +5,74 @@
return function(loveframes)
---------- module start ----------
-- util library
--local util = {}
local statecallbacks = {};
--[[---------------------------------------------------------
- func: SetState(name)
- desc: sets the current state
--]]---------------------------------------------------------
function loveframes.SetState(name)
loveframes.state = name
loveframes.base.state = name
if (loveframes.state ~= name) then
--fire the closing function of the soon-to-be-closed state
if (type(statecallbacks[loveframes.state]) == "table" and
type(statecallbacks[loveframes.state].onclose) == "function") then
--callback must accept the name of the current state and soon-to-be-opened state as args
statecallbacks[loveframes.state].onclose(loveframes.state, name);
end
local oldstate = loveframes.state;
loveframes.state = name
loveframes.base.state = name
--fire the opening function of the newly-opened state
if (type(statecallbacks[loveframes.state]) == "table" and
type(statecallbacks[loveframes.state].onopen) == "function") then
--callback must accept the name of the current state and previous state as args
statecallbacks[loveframes.state].onopen(name, oldstate);
end
end
end
--[[---------------------------------------------------------
- func: SetStateOnOpenCallback(name, func)
- desc: sets a state's opening callback function
--]]---------------------------------------------------------
function loveframes.SetStateOnOpenCallback(name, func)
if (type(name) == "string" and name:gsub("%s", '') ~= '' and
type(func) == "function") then
if (not (statecallbacks[name])) then
statecallbacks[name] = {};
end
statecallbacks[name].onopen = func;
end
end
--[[---------------------------------------------------------
- func: SetStateOnOpenCallback(name, func)
- desc: sets a state's closing callback function
--]]---------------------------------------------------------
function loveframes.SetStateOnCloseCallback(name, func)
if (type(name) == "string" and name:gsub("%s", '') ~= '' and
type(func) == "function") then
if (not (statecallbacks[name])) then
statecallbacks[name] = {};
end
statecallbacks[name].onclose = func;
end
end