mirror of
https://gitlab.com/sheaf/metabrush.git
synced 2024-11-23 15:34:06 +00:00
implement stroke list popover menu functionality
This commit is contained in:
sheaf
parent
27269809e7
commit
53243621b5
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@ -208,7 +208,6 @@ runApplication application = do
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openDocumentsTVar <- STM.newTVarIO testDocuments
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strokeListModelsTVar <- STM.newTVarIO Map.empty
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parStoresTVar <- STM.newTVarIO Map.empty
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listModelUpToDateTMVar <- STM.newTMVarIO ()
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mousePosTVar <- STM.newTVarIO Nothing
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mouseHoldTVar <- STM.newTVarIO Nothing
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modifiersTVar <- STM.newTVarIO Set.empty
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@ -115,6 +115,10 @@ import MetaBrush.Application.UpdateDocument
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import MetaBrush.Asset.WindowIcons
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( drawClose )
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import MetaBrush.Document.Diff
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( Diff(..)
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, HierarchyDiff(..), HistoryDiff(..), ContentDiff(..)
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, DragMoveSelect(..), SelectionMode(..)
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)
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import MetaBrush.Document.History
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( DocumentHistory(..), Do(..)
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, newHistory, back, fwd
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@ -136,7 +140,7 @@ import MetaBrush.UI.InfoBar
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import MetaBrush.UI.FileBar
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( newFileTab, removeFileTab )
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import MetaBrush.UI.StrokeTreeView
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( applyDeletionToStrokeHierarchy, applyDiffToListModel )
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( applyDeletionToStrokeHierarchy, applyDiffToListModel, updateLayerHierarchy, DoLayerChange (..), LayerChange (..) )
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import MetaBrush.UI.Viewport
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( Viewport(..) )
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import MetaBrush.Unique
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@ -690,29 +694,33 @@ instance HandleAction Delete where
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-- Delete layer --
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------------------
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data DeleteLayer = DeleteLayer !MetaBrush.Layer.Layer
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data DeleteLayer = DeleteLayer !ChildLayer
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deriving stock Show
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instance HandleAction MetaBrush.Application.Action.DeleteLayer where
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handleAction
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uiElts
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vars@( Variables { toolTVar, modeTVar } )
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_ =
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return ()
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instance HandleAction DeleteLayer where
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handleAction _ vars
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( DeleteLayer l ) =
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updateLayerHierarchy vars $
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DoLayerChange $
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DeleteItems ( NE.singleton l )
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---------------
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-- New group --
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---------------
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data GroupPosition = GroupAbove | GroupBelow | GroupContaining
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deriving stock Show
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data NewGroup = NewGroup !GroupPosition !MetaBrush.Layer.Layer
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data NewGroup = NewGroup !RelativePosition !ChildLayer
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deriving stock Show
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instance HandleAction NewGroup where
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handleAction ( UIElements { viewport = Viewport {..} } ) ( Variables { redrawStrokesTVar, showGuidesTVar } ) ( NewGroup pos lay ) = do
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return ()
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handleAction _ vars ( NewGroup pos lay ) = do
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u <- Reader.runReaderT freshUnique ( uniqueSupply vars )
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updateLayerHierarchy vars $
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DoLayerChange $
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NewItem
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{ newUnique = u
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, newIsGroup = True
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, newPosition = ( lay, pos )
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}
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-------------------
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-- Toggle guides --
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@ -15,11 +15,12 @@ import Data.Text
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import Math.Linear
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( ℝ(..), T(..) )
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import MetaBrush.Application.Context
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import MetaBrush.Layer
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( ChildLayer, RelativePosition )
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import MetaBrush.UI.Viewport
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( Ruler(..) )
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import MetaBrush.Unique
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( Unique )
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import MetaBrush.Layer (Layer)
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--------------------------------------------------------------------------------
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@ -86,11 +87,10 @@ instance HandleAction Duplicate
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data Delete = Delete
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instance HandleAction Delete
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data DeleteLayer = DeleteLayer !Layer
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data DeleteLayer = DeleteLayer !ChildLayer
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instance HandleAction DeleteLayer
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data GroupPosition = GroupAbove | GroupBelow | GroupContaining
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data NewGroup = NewGroup !GroupPosition !Layer
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data NewGroup = NewGroup !RelativePosition !ChildLayer
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instance HandleAction NewGroup
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data ToggleGuides = ToggleGuides
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@ -32,8 +32,7 @@ import Data.Hashable
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( Hashable )
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-- stm
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import qualified Control.Concurrent.STM.TVar as STM
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import qualified Control.Concurrent.STM.TMVar as STM
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import qualified Control.Concurrent.STM as STM
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-- text
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import Data.Text
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@ -111,10 +110,8 @@ data Variables
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-- This allows us to know, given a parent and a child index,
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-- how to insert/delete from the 'GTK.TreeListModel'.
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, parStoresTVar :: !( STM.TVar ( Map Unique ( Map ( Parent Unique ) GIO.ListStore ) ) )
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-- | This TMVar is used to ensure that the layer hierarchy data
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-- ^ The TMVar is used to ensure that the layer hierarchy data
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-- is kept in-sync between the application and the UI's 'GTK.TreeListModel'.
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, listModelUpToDateTMVar :: !( STM.TMVar () )
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, selectedBrushTVar :: !( STM.TVar ( Maybe SomeBrush ) )
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@ -7,6 +7,14 @@ import Control.Monad
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( void )
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import Data.Foldable
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( for_, traverse_ )
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import Data.IORef
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( IORef, newIORef, atomicModifyIORef' )
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import qualified Data.List.NonEmpty as NE
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import System.IO.Unsafe
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( unsafePerformIO )
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-- haskell-gi-base
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import qualified Data.GI.Base.Signals as GI
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-- gi-cairo-connector
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import qualified GI.Cairo.Render.Connector as Cairo
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@ -15,6 +23,9 @@ import qualified GI.Cairo.Render.Connector as Cairo
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-- gi-gio
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import qualified GI.Gio as GIO
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-- gi-gobject
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import qualified GI.GObject as GObject
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-- gi-gtk
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import qualified GI.Gtk as GTK
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@ -32,7 +43,7 @@ import Control.Monad.IO.Class
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import Data.HashMap.Strict
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( HashMap )
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import qualified Data.HashMap.Strict as HashMap
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( lookup, traverseWithKey )
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( insert, lookup, traverseWithKey, empty )
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import Data.HashSet
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( HashSet )
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import qualified Data.HashSet as HashSet
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@ -48,7 +59,7 @@ import MetaBrush.Asset.WindowIcons
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import MetaBrush.GTK.Util
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( widgetAddClass, widgetAddClasses )
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import MetaBrush.Layer
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( Layer(..) )
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( Layer(..), RelativePosition(..), WithinParent(.. ))
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--------------------------------------------------------------------------------
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-- Types for describing menu items.
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@ -93,18 +104,20 @@ menuActionNames = HashSet.fromList
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, WinAction "about"
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-- preferences
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, WinAction "prefs"
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-- stroke actions
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]
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strokeMenuActionNames :: HashSet ActionName
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strokeMenuActionNames = HashSet.fromList
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[ WinAction "deleteLayer"
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, WinAction "newGroupAbove"
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, WinAction "newGroupBelow"
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, WinAction "newGroupContaining"
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, WinAction "deleteLayer"
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]
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createMenuActions :: IO ( HashMap ActionName GIO.SimpleAction )
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createMenuActions =
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HashMap.traverseWithKey
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( \ actionName _ -> GIO.simpleActionNew ( actionSimpleName actionName ) Nothing )
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( HashSet.toMap menuActionNames )
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( HashSet.toMap menuActionNames <> HashSet.toMap strokeMenuActionNames )
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--------------------------------------------------------------------------------
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-- Menu used in MetaBrush.
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@ -171,21 +184,26 @@ helpMenuDescription =
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[ MenuItemDescription "About MetaBrush" ( Just $ WinAction "about", About ) ( Just "<Ctrl>question" )
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]
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strokeMenuDescription :: Layer -> [ MenuItem ]
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strokeMenuDescription lay =
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strokeMenuDescription :: WithinParent Layer -> [ MenuItem ]
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strokeMenuDescription item@( WithinParent _ lay ) =
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[ case lay of
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StrokeLayer {} -> MenuItemDescription "Delete stroke" ( Nothing, DeleteLayer lay) Nothing
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GroupLayer {} -> MenuItemDescription "Delete group" ( Nothing, DeleteLayer lay) Nothing
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StrokeLayer {} -> MenuItemDescription "Delete stroke" ( Just $ WinAction "deleteLayer", DeleteLayer child ) Nothing
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GroupLayer {} -> MenuItemDescription "Delete group" ( Just $ WinAction "deleteLayer", DeleteLayer child ) Nothing
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, Section ( Just "New group" ) $
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[ MenuItemDescription "...above" ( Nothing, NewGroup GroupAbove lay ) Nothing
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, MenuItemDescription "...containing" ( Nothing, NewGroup GroupContaining lay ) Nothing
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, MenuItemDescription "...below" ( Nothing, NewGroup GroupBelow lay ) Nothing
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[ MenuItemDescription "...above" ( Just $ WinAction "newGroupAbove", NewGroup Above child ) Nothing
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, MenuItemDescription "...below" ( Just $ WinAction "newGroupBelow", NewGroup Below child ) Nothing
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]
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]
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where
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child = fmap layerUnique item
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--------------------------------------------------------------------------------
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-- Creating a GTK popover menu bar from a menu description.
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{-# NOINLINE previousActions #-}
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previousActions :: IORef ( HashMap Text ( NE.NonEmpty GI.SignalHandlerId ) )
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previousActions = unsafePerformIO $ newIORef HashMap.empty
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makeMenu :: MonadIO m => UIElements -> Variables -> GIO.Menu -> [ MenuItem ] -> m ()
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makeMenu uiElts@( UIElements { application, window, menuActions } ) vars menu = traverse_ \case
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SubmenuDescription
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@ -200,7 +218,7 @@ makeMenu uiElts@( UIElements { application, window, menuActions } ) vars menu =
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, menuItemAction = ( mbActionName, actionData )
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, menuItemAccel
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} -> do
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for_ mbActionName \ actionName -> do
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for_ mbActionName $ \ actionName -> do
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let
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simpleName :: Text
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simpleName = actionSimpleName actionName
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@ -211,8 +229,17 @@ makeMenu uiElts@( UIElements { application, window, menuActions } ) vars menu =
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": missing action " <> show actionName
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)
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Just menuItemAction -> do
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_ <- GIO.onSimpleActionActivate menuItemAction
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-- Un-register any previously registered actions.
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-- (For stroke menu actions in which we create a new set of actions
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-- each time the popover menu pop ups.)
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signalId
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<- GIO.onSimpleActionActivate menuItemAction
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( \ _ -> handleAction uiElts vars actionData )
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prevActions <- liftIO $ atomicModifyIORef' previousActions $ \ oldActionsMap ->
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let old = HashMap.lookup simpleName oldActionsMap
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in ( HashMap.insert simpleName ( NE.singleton signalId ) oldActionsMap, maybe [] NE.toList old )
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for_ prevActions $ GObject.signalHandlerDisconnect menuItemAction
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GIO.actionMapRemoveAction window simpleName
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GIO.actionMapAddAction window menuItemAction
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for_ menuItemAccel \ accelText -> do
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actionDetailedName <- GIO.actionPrintDetailedName simpleName Nothing
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@ -8,11 +8,13 @@ module MetaBrush.UI.StrokeTreeView
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( newLayersListModel
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, newLayerView
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, switchStrokeView
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, updateLayerHierarchy
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, applyDeletionToStrokeHierarchy
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, applyChangeToLayerHierarchy
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, applyDiffToListModel
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, getSelectedItem
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, DragSourceData(..)
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, DoLayerChange(..), LayerChange(..)
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)
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where
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@ -20,7 +22,7 @@ module MetaBrush.UI.StrokeTreeView
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import Control.Arrow
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( second )
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import Control.Monad
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( unless, void, when )
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( unless, void )
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import Data.Foldable
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( for_ )
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import Data.List
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@ -33,7 +35,6 @@ import Data.Traversable
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import Data.Word
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( Word32 )
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import GHC.Stack
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( HasCallStack )
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-- containers
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import Data.Map.Strict
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@ -49,6 +50,9 @@ import Data.Generics.Product.Fields
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-- gi-gdk
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import qualified GI.Gdk as GDK
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-- gi-glib
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import qualified GI.GLib as GLib
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-- gi-gio
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import qualified GI.Gio as GIO
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@ -70,9 +74,7 @@ import Control.Lens
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( over )
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-- stm
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import qualified Control.Concurrent.STM.TVar as STM
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import qualified Control.Concurrent.STM.TMVar as STM
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import qualified Control.Monad.STM as STM
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import qualified Control.Concurrent.STM as STM
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-- text
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import Data.Text
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@ -96,7 +98,6 @@ import MetaBrush.Unique
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import MetaBrush.UI.Menu
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( strokeMenuDescription, makeMenu )
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--------------------------------------------------------------------------------
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-- | Custom GTK object used to hold layer data.
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@ -225,13 +226,9 @@ newLayersListModel ( Variables { .. } ) docUnique = do
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mbOldChildStore <-
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STM.atomically $ do
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parStores <- STM.readTVar parStoresTVar
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let mbOldStore =
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Map.lookup ( Parent groupUnique ) =<< Map.lookup docUnique parStores
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when ( isNothing mbOldStore ) $
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-- Take a lock to avoid creating multiple child stores
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-- for the same group.
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STM.takeTMVar listModelUpToDateTMVar
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return mbOldStore
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return $
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Map.lookup ( Parent groupUnique )
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=<< Map.lookup docUnique parStores
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newChildStore <-
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case mbOldChildStore of
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@ -258,8 +255,6 @@ newLayersListModel ( Variables { .. } ) docUnique = do
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STM.atomically $ do
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STM.modifyTVar parStoresTVar
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( Map.insertWith Map.union docUnique ( Map.singleton ( Parent groupUnique ) childStore ) )
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STM.putTMVar listModelUpToDateTMVar ()
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return childStore
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-- Pass a copy of the (reference to the) child store
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@ -469,11 +464,16 @@ newLayerView uiElts@( UIElements { window } ) vars = mdo
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-- void $ GTK.widgetGrabFocus label
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| button == 3
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-> do
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mbTreeListRow <- traverse ( GTK.unsafeCastTo GTK.TreeListRow ) =<< GTK.listItemGetItem listItem
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treeListRow <- case mbTreeListRow of
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Nothing -> error "newLayerView ListItem onSetup: no TreeListRow"
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Just r -> return r
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srcPar <- fmap snd <$> getParent treeListRow
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GTK.widgetUnparent layerPopover
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GTK.widgetSetParent layerPopover expander
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layer <- getLayerData listItem
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GIO.menuRemoveAll layerMenu
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makeMenu uiElts vars layerMenu ( strokeMenuDescription layer )
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makeMenu uiElts vars layerMenu ( strokeMenuDescription ( WithinParent srcPar layer ) )
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GTK.popoverMenuSetMenuModel layerPopover ( Just layerMenu )
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rect <- GDK.newZeroRectangle
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GDK.setRectangleX rect ( round x )
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@ -626,14 +626,16 @@ newLayerView uiElts@( UIElements { window } ) vars = mdo
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let dropTgtUniq = layerUnique dropTgt
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dstFlatIndex <- GTK.treeListRowGetPosition treeListRow
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h <- GTK.widgetGetHeight expander
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let droppedAbove = y < 0.5 * fromIntegral h
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let dropRelPos = if y < 0.5 * fromIntegral h
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then Above
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else Below
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expanded <- GTK.treeListRowGetExpanded treeListRow
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isDescendant <- isDescendantOf dragSrcUniq listItem
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let mbDropIntoGroup
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| expanded
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, not droppedAbove
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, Below <- dropRelPos
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, not isDescendant
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= Just treeListRow
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| otherwise
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@ -641,7 +643,7 @@ newLayerView uiElts@( UIElements { window } ) vars = mdo
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mbDropOutsideGroup
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| dragSrcUniq == dropTgtUniq
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, Parent par <- dstPar
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, not droppedAbove
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, Below <- dropRelPos
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= Just par
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| otherwise
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= Nothing
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@ -691,9 +693,11 @@ newLayerView uiElts@( UIElements { window } ) vars = mdo
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{ parent = fmap snd dstPar
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, item = dropTgtUniq
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}
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, moveAbove = droppedAbove
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, moveRelPos = dropRelPos
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}
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, if droppedAbove then dstFlatIndex else dstFlatIndex + 1
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, case dropRelPos of
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Above -> dstFlatIndex
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Below -> dstFlatIndex + 1
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)
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-- Compute the position that the item we are moving will have
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@ -957,7 +961,7 @@ data LayerChange
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| NewItem
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{ newUnique :: !Unique
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, newIsGroup :: !Bool
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, newSelected :: !( Maybe ChildLayer )
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, newPosition :: !( ChildLayer, RelativePosition )
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}
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| DeleteItems
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{ deleteItems :: !( NE.NonEmpty ChildLayer )
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@ -985,7 +989,7 @@ data MoveDst
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-- | Move an item above or below another item.
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| MoveAboveOrBelow
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{ moveDstItem :: !ChildLayer
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, moveAbove :: !Bool
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, moveRelPos :: !RelativePosition
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-- ^ Whether to move above or below the destination.
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}
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@ -994,15 +998,9 @@ data MoveDst
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-- | Update the layer hierarchy, keeping both the application state and
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-- the GTK ListModel in sync.
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updateLayerHierarchy :: Variables -> DoLayerChange -> IO ()
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updateLayerHierarchy
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vars@( Variables { parStoresTVar, listModelUpToDateTMVar } )
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doOrUndo = do
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updateLayerHierarchy vars@( Variables { parStoresTVar } ) doOrUndo = do
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mbDiff <- STM.atomically $ do
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-- Ensure the GTK ListModel is up to date before continuing
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-- (just a precaution).
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STM.takeTMVar listModelUpToDateTMVar
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-- TODO: need to use 'modifyingCurrentDocument' in some form,
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-- but that function doesn't permit modifying history.
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@ -1075,10 +1073,10 @@ updateLayerHierarchy
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return $ ( , ) <$> ( fst <$> mbNewHist ) <*> mbDiff
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for_ mbDiff $ \ ( docUnique, diff ) ->
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GLib.idleAdd GLib.PRIORITY_HIGH_IDLE $ do
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applyDiffToListModel parStoresTVar docUnique diff
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return False
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STM.atomically $
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STM.writeTMVar listModelUpToDateTMVar ()
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-- | Apply a change to the application layer hierarchy.
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|
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@ -1093,11 +1091,11 @@ applyChangeToLayerHierarchy change hierarchy =
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let mbDst =
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case moveDst of
|
||||
MoveAboveOrBelow
|
||||
{ moveAbove
|
||||
{ moveRelPos
|
||||
, moveDstItem = WithinParent parUniq tgtUniq
|
||||
} ->
|
||||
Just ( parUniq
|
||||
, Just ( tgtUniq , moveAbove )
|
||||
, Just ( tgtUniq , moveRelPos )
|
||||
)
|
||||
MoveToTopOfGroup
|
||||
{ dstParUnique } ->
|
||||
|
|
@ -1118,7 +1116,7 @@ applyChangeToLayerHierarchy change hierarchy =
|
|||
| otherwise
|
||||
= False
|
||||
, not expandedGroupWithChildren
|
||||
-> Just ( grandParentUnique, Just ( parentUnique, False ) )
|
||||
-> Just ( grandParentUnique, Just ( parentUnique, Below ) )
|
||||
| otherwise
|
||||
-> Nothing
|
||||
in case mbDst of
|
||||
|
|
@ -1143,14 +1141,9 @@ applyChangeToLayerHierarchy change hierarchy =
|
|||
}
|
||||
Nothing -> Nothing
|
||||
)
|
||||
NewItem { newUnique = u, newIsGroup, newSelected } ->
|
||||
let ( dstParUniq, dstChild ) = case newSelected of
|
||||
Nothing -> ( Root, Nothing )
|
||||
Just ( WithinParent { parent = par, item = dstUniq } ) ->
|
||||
-- TODO: this means we always create a new item **above** the
|
||||
-- selected item. It would make sense to customise this.
|
||||
( par, Just ( dstUniq, True ) )
|
||||
!( !hierarchy', dstChildIx ) = insertLayerIntoParent hierarchy ( dstParUniq, dstChild ) u
|
||||
NewItem { newUnique = u, newIsGroup, newPosition = ( WithinParent dstParUniq childUniq, relPos ) } ->
|
||||
let dropPos = Just ( childUniq, relPos )
|
||||
!( !hierarchy', dstChildIx ) = insertLayerIntoParent hierarchy ( dstParUniq, dropPos ) u
|
||||
!hierarchy'' =
|
||||
if newIsGroup
|
||||
then insertGroup ( Parent u ) [] hierarchy'
|
||||
|
|
@ -1228,7 +1221,8 @@ applyDeletionToStrokeHierarchy hierarchy0 = go hierarchy0
|
|||
--
|
||||
-- The change to the application 'StrokeHierarchy' is done beforehand,
|
||||
-- in 'applyChangeToLayerHierarchy'.
|
||||
applyDiffToListModel :: STM.TVar ( Map Unique ( Map ( Parent Unique ) GIO.ListStore ) )
|
||||
applyDiffToListModel :: HasCallStack
|
||||
=> STM.TVar ( Map Unique ( Map ( Parent Unique ) GIO.ListStore ) )
|
||||
-> Unique
|
||||
-> ( Do, HierarchyDiff )
|
||||
-> IO ()
|
||||
|
|
@ -1287,7 +1281,7 @@ applyDiffToListModel parStoreTVar docUnique ( doOrUndo, diff ) = do
|
|||
Just item -> do
|
||||
GIO.listStoreRemove dstStore dstIx
|
||||
GIO.listStoreInsert srcStore srcIx item
|
||||
NewLayer { newPosition = WithinParent dstPar dstIx, newUnique, newIsGroup } ->
|
||||
NewLayer { newPosition = WithinParent dstPar dstIx, newUnique, newIsGroup } -> do
|
||||
case Map.lookup dstPar parStoreFromUniq of
|
||||
Nothing ->
|
||||
putStrLn $ unlines
|
||||
|
|
@ -1372,7 +1366,7 @@ sequentialOn f ( a NE.:| as ) = go ( f a ) as
|
|||
moveLayerUpdate
|
||||
:: ( Parent Unique, Unique )
|
||||
-- ^ source
|
||||
-> ( Parent Unique, Maybe ( Unique, Bool ) )
|
||||
-> ( Parent Unique, Maybe ( Unique, RelativePosition ) )
|
||||
-- ^ destination
|
||||
--
|
||||
-- - @Nothing@: drop as first element of group
|
||||
|
|
@ -1423,7 +1417,7 @@ removeLayerFromParent hierarchy ( parent, u ) =
|
|||
--
|
||||
-- NB: does not add the layer itself.
|
||||
insertLayerIntoParent :: StrokeHierarchy
|
||||
-> ( Parent Unique, Maybe ( Unique, Bool ) )
|
||||
-> ( Parent Unique, Maybe ( Unique, RelativePosition ) )
|
||||
-- ^ destination
|
||||
--
|
||||
-- - @Nothing@: drop as first element of group
|
||||
|
|
@ -1441,12 +1435,12 @@ insertLayerIntoParent hierarchy ( newPar, mbTgtUniq ) srcUniq =
|
|||
, 0
|
||||
)
|
||||
-- Drop (before or after) given child.
|
||||
Just ( tgtUniq, dropAbove ) ->
|
||||
Just ( tgtUniq, dropRelPos ) ->
|
||||
let ( bef, aft ) = break ( == tgtUniq ) $ filter ( /= srcUniq ) newPar_oldCs
|
||||
in ( if dropAbove
|
||||
then bef ++ [ srcUniq ] ++ aft
|
||||
else bef ++ take 1 aft ++ [ srcUniq ] ++ drop 1 aft
|
||||
in ( case dropRelPos of
|
||||
Above -> bef ++ [ srcUniq ] ++ aft
|
||||
Below -> bef ++ take 1 aft ++ [ srcUniq ] ++ drop 1 aft
|
||||
, fromIntegral ( length ( takeWhile ( /= tgtUniq ) $ newPar_oldCs ) )
|
||||
+ if dropAbove then 0 else 1
|
||||
+ case dropRelPos of { Above -> 0; Below -> 1 }
|
||||
)
|
||||
in ( insertGroup newPar newPar_newCs hierarchy, newChildPos )
|
||||
|
|
|
|||
|
|
@ -1,5 +1,8 @@
|
|||
module MetaBrush.UI.StrokeTreeView where
|
||||
|
||||
-- base
|
||||
import GHC.Stack
|
||||
|
||||
-- containers
|
||||
import Data.Map.Strict
|
||||
( Map )
|
||||
|
|
@ -28,7 +31,8 @@ switchStrokeView :: GTK.ListView -> Variables -> Maybe Unique -> IO ()
|
|||
|
||||
newLayerView :: UIElements -> Variables -> IO GTK.ListView
|
||||
|
||||
applyDiffToListModel :: STM.TVar ( Map Unique ( Map ( Parent Unique ) GIO.ListStore ) )
|
||||
applyDiffToListModel :: HasCallStack
|
||||
=> STM.TVar ( Map Unique ( Map ( Parent Unique ) GIO.ListStore ) )
|
||||
-> Unique
|
||||
-> ( Do, HierarchyDiff )
|
||||
-> IO ()
|
||||
|
|
|
|||
|
|
@ -64,7 +64,7 @@ data WithinParent a =
|
|||
{ parent :: !( Parent Unique )
|
||||
, item :: !a
|
||||
}
|
||||
deriving stock ( Show, Eq, Generic )
|
||||
deriving stock ( Show, Eq, Generic, Functor )
|
||||
deriving anyclass NFData
|
||||
|
||||
-- | A child layer within a parent.
|
||||
|
|
@ -72,6 +72,12 @@ type ChildLayer = WithinParent Unique
|
|||
-- | A child layer, with its index among the list of children of its parent.
|
||||
type ChildLayerPosition = WithinParent Word32
|
||||
|
||||
-- | Where to position something relative to another layer.
|
||||
data RelativePosition
|
||||
= Above
|
||||
| Below
|
||||
deriving stock ( Eq, Ord, Show )
|
||||
|
||||
-- | Content in a hierarchical tree-like structure.
|
||||
data Hierarchy a =
|
||||
Hierarchy
|
||||
|
|
|
|||
Loading…
Reference in a new issue