Gamgine.State.StateTree

Documentation

data StateTree a

the tree of application states and how they entered and leaved

Constructors

Branch

Fields

• state :: State a
• enterWhen :: StateTransition
• leaveWhen :: StateTransition
• adjacents :: [StateTree a]

type EnterWhen = StateTransition

at which event the next state should be entered

type LeaveWhen = StateTransition

at which event the current state should be leaved

data StateTransition

when a state should be entered or leaved

Constructors

ByKey Key InputState

ByKeyWithMod Key InputState Modifier

ByMouse MouseButton InputState

ByMouseWithMod MouseButton InputState Modifier

NoTransition

Instances

Eq StateTransition

Methods

(==) :: StateTransition -> StateTransition -> Bool

(/=) :: StateTransition -> StateTransition -> Bool

Ord StateTransition

Methods

compare :: StateTransition -> StateTransition -> Ordering

(<) :: StateTransition -> StateTransition -> Bool

(<=) :: StateTransition -> StateTransition -> Bool

(>) :: StateTransition -> StateTransition -> Bool

(>=) :: StateTransition -> StateTransition -> Bool

max :: StateTransition -> StateTransition -> StateTransition

min :: StateTransition -> StateTransition -> StateTransition

root :: State a -> [StateTree a] -> StateTree a

enterState :: MousePos -> a -> StateTree a -> Maybe (a, StateTree a)

leaveState :: a -> StateTree a -> (a, StateTree a)

handleKeyEvent :: KeyInfo -> a -> StateTree a -> (a, StateTree a)

handleMouseEvent :: MouseInfo -> a -> StateTree a -> (a, StateTree a)