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This commit is contained in:
Simon Michael 2016-06-09 09:51:15 -07:00
parent 1ed7819467
commit a6d859c273
1 changed files with 4 additions and 3 deletions
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7
hledger-ui/Hledger/UI/UITypes.hs
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@ -68,10 +68,11 @@ data AppState = AppState {
-- | hledger-ui screen types & instances.
-- Each screen type has generically named initialisation, draw, and event handling functions,
-- and zero or more uniquely named screen state fields, which hold the data for a particular
-- instance of this screen. The latter create partial functions, so take care.
-- instance of this screen. Note the latter create partial functions, which means that some invalid
-- cases need to be handled, and also that their lenses are traversals, not single-value getters.
data Screen =
AccountsScreen {
sInit :: Day -> Bool -> AppState -> AppState -- ^ function to update the screen's state
sInit :: Day -> Bool -> AppState -> AppState -- ^ function to initialise or update this screen's state
,sDraw :: AppState -> [Widget] -- ^ brick renderer for this screen
,sHandle :: AppState -> Vty.Event -> EventM (Next AppState) -- ^ brick event handler for this screen
-- state fields. These ones have lenses:
@ -124,7 +125,7 @@ data RegisterScreenItem = RegisterScreenItem {
type NumberedTransaction = (Integer, Transaction)
-- needed for lenses
-- dummy monoid instance needed for lenses for now since the List fields are not common across constructors
instance Monoid (List a)
where
mempty = list "" V.empty 1