mirror of
https://gitlab.com/sheaf/metabrush.git
synced 2024-11-27 09:24:08 +00:00
fixes to brush widget UI
This commit is contained in:
sheaf
parent
77a36e1f0b
commit
300fbf92c0
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@ -8,7 +8,7 @@ import Control.Monad
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import Control.Monad.ST
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( RealWorld )
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import Data.Foldable
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( for_, sequenceA_ )
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( for_ )
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import Data.Int
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( Int32 )
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import Data.List
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@ -106,6 +106,8 @@ import Math.Linear
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-- MetaBrush
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import MetaBrush.Asset.WindowIcons
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( drawClose )
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import qualified MetaBrush.Brush.Widget as Brush
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( describeWidgetAction )
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import MetaBrush.Context
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( UIElements(..), Variables(..)
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, Modifier(..), modifierKey
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@ -128,6 +130,7 @@ import MetaBrush.Document.Selection
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, UpdateInfo(..)
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, deleteSelected
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, dragUpdate, pressingControl
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, BrushWidgetActionState(..)
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, applyBrushWidgetAction
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)
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import MetaBrush.Document.Serialise
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@ -135,7 +138,7 @@ import MetaBrush.Document.Serialise
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import MetaBrush.Document.SubdivideStroke
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( subdivide )
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import MetaBrush.Document.Update
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( activeDocument, withActiveDocument
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( activeDocument
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, DocChange(..), DocumentUpdate(..), PureDocModification(..), DocModification(..)
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, modifyingCurrentDocument
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, updateUIAction, updateHistoryState
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@ -787,27 +790,26 @@ instance HandleAction MouseMove where
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mbPartialPath <- STM.readTVar partialPathTVar
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mode <- STM.readTVar modeTVar
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STM.writeTVar recomputeStrokesTVar True -- need to keep updating for mouse hover updates
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case tool of
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Pen
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| Just pp <- mbPartialPath
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, any ( \ case { Control _ -> True; _ -> False } ) modifiers
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-> do STM.writeTVar partialPathTVar ( Just $ pp { partialControlPoint = Just pos } )
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pure Don'tModifyDoc
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| BrushMode <- mode
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-- Pen tool in brush mode: modify brush parameters through brush widget.
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-> do mbHoldAction <- STM.readTVar mouseHoldTVar
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case mbHoldAction of
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Just ( BrushWidgetAction { brushWidgetAction } ) ->
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case applyBrushWidgetAction ( pressingControl modifiers ) pos ( Just brushWidgetAction) doc of
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Nothing ->
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pure Don'tModifyDoc
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Just ( widgetAction, newDocument ) -> do
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STM.writeTVar mouseHoldTVar ( Just $ BrushWidgetAction pos widgetAction )
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let changeText :: Text
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changeText = "Update brush parameters"
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pure ( UpdateDoc . UpdateDocumentTo $ HistoryChange {..} )
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_ -> pure Don'tModifyDoc
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_ -> pure Don'tModifyDoc
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if
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| Pen <- tool
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, Just pp <- mbPartialPath
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, any ( \ case { Control _ -> True; _ -> False } ) modifiers
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-> do STM.writeTVar partialPathTVar ( Just $ pp { partialControlPoint = Just pos } )
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pure Don'tModifyDoc
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-- In brush mode: modify brush parameters through brush widget.
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| BrushMode <- mode
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-> do mbHoldAction <- STM.readTVar mouseHoldTVar
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case mbHoldAction of
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Just ( BrushWidgetAction { brushWidgetAction } ) ->
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case applyBrushWidgetAction ( pressingControl modifiers ) pos ( Just brushWidgetAction ) doc of
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Nothing ->
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pure Don'tModifyDoc
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Just ( widgetAction, newDocument ) -> do
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STM.writeTVar mouseHoldTVar ( Just $ BrushWidgetAction pos widgetAction )
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pure ( UpdateDoc . UpdateDocumentTo $ TrivialChange {..} )
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_ -> pure Don'tModifyDoc
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| otherwise
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-> pure Don'tModifyDoc
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mbDoc <- fmap present <$> STM.atomically ( activeDocument vars )
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for_ mbDoc \doc ->
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updateInfoBar viewportDrawingArea infoBar vars ( Just doc )
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@ -863,38 +865,35 @@ instance HandleAction MouseClick where
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SingleClick -> do
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modifiers <- STM.readTVar modifiersTVar
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tool <- STM.readTVar toolTVar
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case tool of
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-- Selection mode mouse hold:
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--
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-- - If holding shift or alt, mouse hold initiates a rectangular selection.
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-- - If not holding shift or alt:
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-- - if mouse click selected an object, initiate a drag move,
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-- - otherwise, initiate a rectangular selection.
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Selection ->
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case selectionMode modifiers of
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-- Drag move: not holding shift or alt, click has selected something.
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New
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| PathMode <- mode
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, Just ( dragMove, newDoc ) <- dragMoveSelect pos doc
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-> do
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STM.writeTVar mouseHoldTVar ( Just $ DragMoveHold pos dragMove )
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case dragMove of
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ClickedOnSelected ->
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case mode of
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PathMode ->
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case tool of
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Selection ->
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-- Selection mode mouse hold:
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--
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-- - If holding shift or alt, mouse hold initiates a rectangular selection.
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-- - If not holding shift or alt:
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-- - if mouse click selected an object, initiate a drag move,
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-- - otherwise, initiate a rectangular selection.
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case selectionMode modifiers of
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-- Drag move: not holding shift or alt, click has selected something.
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New
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| Just ( dragMove, newDoc ) <- dragMoveSelect pos doc
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-> do
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STM.writeTVar mouseHoldTVar ( Just $ DragMoveHold pos dragMove )
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case dragMove of
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ClickedOnSelected ->
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pure Don'tModifyDoc
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ClickedOnUnselected ->
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pure ( UpdateDoc . UpdateDocumentTo . TrivialChange $ newDoc )
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ClickedOnCurve {} ->
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pure Don'tModifyDoc
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-- Rectangular selection.
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_ -> do
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STM.writeTVar mouseHoldTVar ( Just $ SelectionHold pos )
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pure Don'tModifyDoc
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ClickedOnUnselected ->
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pure ( UpdateDoc . UpdateDocumentTo . TrivialChange $ newDoc )
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ClickedOnCurve {} ->
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pure Don'tModifyDoc
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-- Rectangular selection.
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_ -> do
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STM.writeTVar mouseHoldTVar ( Just $ SelectionHold pos )
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pure Don'tModifyDoc
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Pen ->
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case mode of
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-- Pen tool in path mode: start or continue a drawing operation.
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PathMode -> do
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Pen -> do
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-- Pen tool in path mode: start or continue a drawing operation.
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mbPartialPath <- STM.readTVar partialPathTVar
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STM.writeTVar mouseHoldTVar ( Just $ DrawHold pos )
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case mbPartialPath of
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@ -922,24 +921,23 @@ instance HandleAction MouseClick where
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Just pp -> do
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STM.writeTVar partialPathTVar ( Just $ pp { firstPoint = False } )
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pure Don'tModifyDoc
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BrushMode -> do
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-- Brush mode: modify brush parameters through brush widget.
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mbAction <- STM.readTVar mouseHoldTVar
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let mbPrevWidgetAction = case mbAction of
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Just ( BrushWidgetAction { brushWidgetAction } )
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-> Just brushWidgetAction
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_ -> Nothing
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case applyBrushWidgetAction ( pressingControl modifiers ) pos mbPrevWidgetAction doc of
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Just ( actionState@( BrushWidgetActionState { brushWidgetAction = act } ), newDocument ) -> do
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STM.writeTVar mouseHoldTVar ( Just $ BrushWidgetAction pos actionState )
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let changeText :: Text
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changeText = "Update brush parameters (" <> Brush.describeWidgetAction act <> ")"
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pure ( UpdateDoc . UpdateDocumentTo $ HistoryChange {..} )
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_ ->
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pure Don'tModifyDoc
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-- Pen tool in brush mode: modify brush parameters through brush widget.
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BrushMode -> do
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mbAction <- STM.readTVar mouseHoldTVar
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let mbPrevWidgetAction = case mbAction of
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Just ( BrushWidgetAction { brushWidgetAction } )
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-> Just brushWidgetAction
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_ -> Nothing
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case applyBrushWidgetAction ( pressingControl modifiers ) pos mbPrevWidgetAction doc of
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Nothing ->
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pure Don'tModifyDoc
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Just ( widgetAction, newDocument ) -> do
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STM.writeTVar mouseHoldTVar ( Just $ BrushWidgetAction pos widgetAction )
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let changeText :: Text
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changeText = "Update brush parameters"
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pure ( UpdateDoc . UpdateDocumentTo $ HistoryChange {..} )
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MetaMode -> pure Don'tModifyDoc
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_ -> pure Don'tModifyDoc
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DoubleClick -> do
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tool <- STM.readTVar toolTVar
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@ -1178,6 +1176,20 @@ instance HandleAction MouseRelease where
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BrushMode -> do
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STM.writeTVar mouseHoldTVar Nothing
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pure Don'tModifyDoc
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{-
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mbHoldAction <- STM.readTVar mouseHoldTVar
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case mbHoldAction of
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Just ( BrushWidgetAction { brushWidgetAction } ) ->
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case applyBrushWidgetAction ( pressingControl modifiers ) pos ( Just brushWidgetAction ) doc of
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Just ( BrushWidgetActionState { brushWidgetAction = act }, newDocument ) -> do
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STM.writeTVar mouseHoldTVar Nothing
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let changeText :: Text
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changeText = "Update brush parameters (" <> Brush.describeWidgetAction act <> ")"
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pure ( UpdateDoc . UpdateDocumentTo $ HistoryChange {..} )
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_ ->
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pure Don'tModifyDoc
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_ -> pure Don'tModifyDoc
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-}
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MetaMode ->
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pure Don'tModifyDoc
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@ -15,7 +15,7 @@ module MetaBrush.Document.Selection
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-- base
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import Control.Monad
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( guard )
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( guard, unless )
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import Control.Monad.ST
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( RealWorld )
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import Data.Functor
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@ -23,7 +23,7 @@ import Data.Functor
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import Data.Functor.Identity
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( runIdentity )
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import Data.Maybe
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( catMaybes, listToMaybe )
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( catMaybes, isNothing, listToMaybe )
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import Data.Monoid
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( Sum(..) )
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import Data.Semigroup
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@ -70,7 +70,7 @@ import Control.Monad.Trans.Class
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( lift )
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import Control.Monad.Trans.Maybe
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( MaybeT(..) )
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import Control.Monad.Trans.State.Strict
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import Control.Monad.Trans.State.Strict as State
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( StateT(..), State
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, evalState, evalStateT, runState
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, get, put, modify'
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@ -845,6 +845,7 @@ data BrushWidgetActionState
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= BrushWidgetActionState
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{ brushWidgetAction :: !Brush.WidgetAction
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, brushWidgetStrokeUnique :: !Unique
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, brushWidgetCurveIndex :: !Int
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, brushWidgetPointIndex :: !Int
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, brushWidgetPointBeingMoved :: !( T ( ℝ 2 ) )
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}
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@ -860,24 +861,21 @@ instance Semigroup BrushWidgetActionState where
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applyBrushWidgetAction :: Bool -> ℝ 2 -> Maybe BrushWidgetActionState -> Document -> Maybe ( BrushWidgetActionState, Document )
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applyBrushWidgetAction pressingCtrl c mbPrevAction doc@( Document { zoomFactor } ) =
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let
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res :: Tardis ( Maybe BrushWidgetActionState ) ( Maybe BrushWidgetActionState ) Document
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res = do
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newDoc <- ( field' @"documentContent" . field' @"strokes" . traverse ) updateStrokeHierarchy doc
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Tardis.getPast >>= Tardis.sendPast
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pure newDoc
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in case runIdentity . ( `Tardis.runTardisT` ( Nothing, Nothing ) ) $ res of
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( newDoc, ( _, Just brushWidgetAction ) )
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res :: State ( Maybe BrushWidgetActionState ) Document
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res = ( field' @"documentContent" . field' @"strokes" . traverse ) updateStrokeHierarchy doc
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in case ( `runState` Nothing ) res of
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( newDoc, Just brushWidgetAction )
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-> Just ( brushWidgetAction, newDoc )
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_ -> Nothing
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where
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updateStrokeHierarchy :: StrokeHierarchy -> ( Tardis ( Maybe BrushWidgetActionState ) ( Maybe BrushWidgetActionState ) ) StrokeHierarchy
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updateStrokeHierarchy :: StrokeHierarchy -> State ( Maybe BrushWidgetActionState ) StrokeHierarchy
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updateStrokeHierarchy ( StrokeGroup { .. } ) = do
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newContents <- traverse updateStrokeHierarchy groupContents
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pure ( StrokeGroup { groupContents = newContents, .. } )
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updateStrokeHierarchy ( StrokeLeaf { strokeLeaf } ) = StrokeLeaf <$> updateStroke strokeLeaf
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updateStroke :: Stroke -> Tardis ( Maybe BrushWidgetActionState ) ( Maybe BrushWidgetActionState ) Stroke
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updateStroke :: Stroke -> State ( Maybe BrushWidgetActionState ) Stroke
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updateStroke stroke@( Stroke { strokeVisible, strokeUnique, strokeBrush, strokeSpline = ( spline0 :: StrokeSpline _clo ( Record pointFields ) ) } ) =
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case strokeBrush of
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-- Don't touch strokes without brushes.
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@ -906,12 +904,11 @@ applyBrushWidgetAction pressingCtrl c mbPrevAction doc@( Document { zoomFactor }
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-> ( Record brushFields -> pointParams -> pointParams )
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-> Unique
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-> StrokeSpline clo pointParams
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-> Tardis ( Maybe BrushWidgetActionState ) ( Maybe BrushWidgetActionState )
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( StrokeSpline clo pointParams )
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-> State ( Maybe BrushWidgetActionState ) ( StrokeSpline clo pointParams )
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updateSpline brush toBrushParams updatePointParams uniq oldSpline =
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ibitraverseSpline
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( updateSplineCurve ( splineStart oldSpline ) brush toBrushParams updatePointParams uniq )
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( updateSplinePoint brush toBrushParams updatePointParams uniq 0 )
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( updateSplinePoint brush toBrushParams updatePointParams uniq 0 0 )
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oldSpline
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updateSplineCurve
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@ -923,91 +920,106 @@ applyBrushWidgetAction pressingCtrl c mbPrevAction doc@( Document { zoomFactor }
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-> ( Record brushFields -> pointParams -> pointParams )
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-> Unique -> Int
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-> PointData pointParams -> Curve clo' ( CachedStroke RealWorld ) ( PointData pointParams )
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-> Tardis ( Maybe BrushWidgetActionState ) ( Maybe BrushWidgetActionState )
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-> State ( Maybe BrushWidgetActionState )
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( Curve clo' ( CachedStroke RealWorld ) ( PointData pointParams ) )
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updateSplineCurve _start brush toBrushParams updatePointParams uniq i _sp0 curve
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-- If we have already started a widget action, only continue an action
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-- at the point with the correct index in the stroke.
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| case mbPrevAction of { Just act -> brushWidgetPointIndex act /= i ; Nothing -> False }
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= pure curve
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| case mbPrevAction of
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Just act ->
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case ssplineType @clo' of
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SClosed -> brushWidgetCurveIndex act /= i && brushWidgetCurveIndex act /= 0
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SOpen -> brushWidgetCurveIndex act /= i
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Nothing -> False
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= case mbPrevAction of
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Just act
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| abs ( i - brushWidgetCurveIndex act ) <= 1
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-> pure $ curve { curveData = invalidateCache $ curveData curve }
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_ -> pure curve
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| otherwise
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, let i' :: Int
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j' :: Int -> Int
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( i', j' ) = case ssplineType @clo' of { SClosed -> ( 0, const 0 ) ; SOpen -> ( i, id ) }
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= case curve of
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line@( LineTo sp1 _ ) -> do
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sp1' <- traverse ( updateSplinePoint brush toBrushParams updatePointParams uniq i ) sp1
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pure ( line { curveEnd = sp1' } )
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bez2@( Bezier2To sp1 sp2 _ ) -> do
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sp1' <- updateSplinePoint brush toBrushParams updatePointParams uniq i sp1
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sp2' <- traverse ( updateSplinePoint brush toBrushParams updatePointParams uniq i ) sp2
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pure ( bez2 { controlPoint = sp1', curveEnd = sp2' } )
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bez3@( Bezier3To sp1 sp2 sp3 _ ) -> do
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sp1' <- updateSplinePoint brush toBrushParams updatePointParams uniq i sp1
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sp2' <- updateSplinePoint brush toBrushParams updatePointParams uniq i sp2
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sp3' <- traverse ( updateSplinePoint brush toBrushParams updatePointParams uniq i ) sp3
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pure ( bez3 { controlPoint1 = sp1', controlPoint2 = sp2', curveEnd = sp3' } )
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line@( LineTo sp1 dat ) -> do
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sp1' <- traverse ( updateSplinePoint brush toBrushParams updatePointParams uniq i' ( j' 1 ) ) sp1
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pure ( line { curveEnd = sp1', curveData = invalidateCache dat } )
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bez2@( Bezier2To sp1 sp2 dat ) -> do
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sp1' <- updateSplinePoint brush toBrushParams updatePointParams uniq i 1 sp1
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sp2' <- traverse ( updateSplinePoint brush toBrushParams updatePointParams uniq i ( j' 2 ) ) sp2
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pure ( bez2 { controlPoint = sp1', curveEnd = sp2', curveData = invalidateCache dat } )
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bez3@( Bezier3To sp1 sp2 sp3 dat ) -> do
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sp1' <- updateSplinePoint brush toBrushParams updatePointParams uniq i 1 sp1
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sp2' <- updateSplinePoint brush toBrushParams updatePointParams uniq i 2 sp2
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sp3' <- traverse ( updateSplinePoint brush toBrushParams updatePointParams uniq i ( j' 3 ) ) sp3
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pure ( bez3 { controlPoint1 = sp1', controlPoint2 = sp2', curveEnd = sp3', curveData = invalidateCache dat } )
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inSelectionRange :: ℝ 2 -> T ( ℝ 2 ) -> Bool
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inSelectionRange p cp =
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squaredNorm ( c --> ( cp • p ) :: T ( ℝ 2 ) ) * zoomFactor ^ ( 2 :: Int ) < 16
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lineInSelectionRange :: ℝ 2 -> Segment ( T ( ℝ 2 ) ) -> Bool
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lineInSelectionRange p seg
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= case closestPointOnSegment @( T ( ℝ 2 ) ) c ( ( \ q -> ( q • p ) ) <$> seg ) of
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( _, q ) -> squaredNorm ( c --> q :: T ( ℝ 2 ) ) * zoomFactor ^ ( 2 :: Int ) < 16
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lineInSelectionRange p seg =
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case closestPointOnSegment @( T ( ℝ 2 ) ) c ( ( \ q -> ( q • p ) ) <$> seg ) of
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( _, q ) -> squaredNorm ( c --> q :: T ( ℝ 2 ) ) * zoomFactor ^ ( 2 :: Int ) < 16
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updateSplinePoint
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:: forall pointParams brushFields
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. NamedBrush brushFields
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-> ( pointParams -> Record brushFields )
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-> ( Record brushFields -> pointParams -> pointParams )
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-> Unique -> Int
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-> Unique -> Int -> Int
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-> PointData pointParams
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-> Tardis ( Maybe BrushWidgetActionState ) ( Maybe BrushWidgetActionState )
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-> State ( Maybe BrushWidgetActionState )
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( PointData pointParams )
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updateSplinePoint brush toBrushParams updatePointParams uniq i pt = do
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mbPreviousBrushWidgetAction <- Tardis.getPast
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case mbPreviousBrushWidgetAction of
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-- Already started a brush widget update: don't do anything else.
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Just {}
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-> pure pt
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-- Otherwise, check whether we are updating the brush parameters at this stroke point.
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Nothing -> do
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let
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currentBrushParams :: Record brushFields
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currentBrushParams = toBrushParams ( brushParams pt )
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brushWidgetElts :: Brush.WidgetElements
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brushWidgetElts = Brush.widgetElements ( brushWidget brush ) currentBrushParams
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newBrushWidgetAction :: Maybe BrushWidgetActionState
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( newBrushWidgetAction, newBrushParams ) = case mbPrevAction of
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-- Continue the current brush widget action.
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Just prevAction@( BrushWidgetActionState { brushWidgetPointBeingMoved = oldPt, brushWidgetAction = act }) ->
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let newPt = pointCoords pt --> c
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newParams =
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Brush.widgetUpdate ( brushWidget brush ) act
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( oldPt, newPt )
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currentBrushParams
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in ( Just $ prevAction { brushWidgetPointBeingMoved = newPt }, newParams )
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Nothing ->
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-- See if we can start a new brush widget action.
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case listToMaybe $ filter ( inSelectionRange $ pointCoords pt ) ( Brush.widgetPoints brushWidgetElts ) of
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Just cp ->
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let newAction =
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BrushWidgetActionState
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{ brushWidgetPointBeingMoved = cp
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, brushWidgetStrokeUnique = uniq
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, brushWidgetPointIndex = i
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, brushWidgetAction = case brushWidget brush of
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Brush.SquareWidget -> Brush.ScaleAction Brush.ScaleXY
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Brush.RotatableRectangleWidget ->
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if pressingCtrl
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then Brush.RotateAction
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else Brush.ScaleAction Brush.ScaleXY
|
||||
}
|
||||
in ( Just newAction, currentBrushParams )
|
||||
Nothing -> ( Nothing, currentBrushParams )
|
||||
-- TODO: handle clicking on an edge.
|
||||
-- case listToMaybe $ filter ( lineInSelectionRange $ pointCoords pt ) ( Brush.widgetLines brushWidgetElts ) of
|
||||
-- Just ln -> error "todo"
|
||||
-- Nothing -> Nothing
|
||||
updateSplinePoint brush toBrushParams updatePointParams uniq i j pt = do
|
||||
let
|
||||
currentBrushParams :: Record brushFields
|
||||
currentBrushParams = toBrushParams ( brushParams pt )
|
||||
brushWidgetElts :: Brush.WidgetElements
|
||||
brushWidgetElts = Brush.widgetElements ( brushWidget brush ) currentBrushParams
|
||||
newBrushWidgetAction :: Maybe BrushWidgetActionState
|
||||
( newBrushWidgetAction, newBrushParams ) = case mbPrevAction of
|
||||
-- Continue the current brush widget action.
|
||||
Just prevAction@( BrushWidgetActionState
|
||||
{ brushWidgetPointBeingMoved = oldPt
|
||||
, brushWidgetPointIndex = j'
|
||||
, brushWidgetAction = act }) ->
|
||||
if j /= j'
|
||||
-- If we have already started a widget action, only continue an action
|
||||
-- at the point with the correct index in the stroke.
|
||||
then ( Just prevAction, currentBrushParams )
|
||||
else
|
||||
let newPt = pointCoords pt --> c
|
||||
newParams =
|
||||
Brush.widgetUpdate ( brushWidget brush ) act
|
||||
( oldPt, newPt )
|
||||
currentBrushParams
|
||||
in ( Just $ prevAction { brushWidgetPointBeingMoved = newPt }, newParams )
|
||||
Nothing ->
|
||||
-- See if we can start a new brush widget action.
|
||||
case listToMaybe $ filter ( inSelectionRange $ pointCoords pt ) ( Brush.widgetPoints brushWidgetElts ) of
|
||||
Just cp ->
|
||||
let newAction =
|
||||
BrushWidgetActionState
|
||||
{ brushWidgetPointBeingMoved = cp
|
||||
, brushWidgetStrokeUnique = uniq
|
||||
, brushWidgetCurveIndex = i
|
||||
, brushWidgetPointIndex = j
|
||||
, brushWidgetAction = case brushWidget brush of
|
||||
Brush.SquareWidget -> Brush.ScaleAction Brush.ScaleXY
|
||||
Brush.RotatableRectangleWidget ->
|
||||
if pressingCtrl
|
||||
then Brush.RotateAction
|
||||
else Brush.ScaleAction Brush.ScaleXY
|
||||
}
|
||||
in ( Just newAction, currentBrushParams )
|
||||
Nothing -> ( Nothing, currentBrushParams )
|
||||
-- TODO: handle clicking on an edge.
|
||||
-- case listToMaybe $ filter ( lineInSelectionRange $ pointCoords pt ) ( Brush.widgetLines brushWidgetElts ) of
|
||||
-- Just ln -> error "todo"
|
||||
-- Nothing -> Nothing
|
||||
|
||||
Tardis.sendFuture newBrushWidgetAction
|
||||
pure ( set ( field' @"brushParams" ) ( updatePointParams newBrushParams ( brushParams pt ) ) pt )
|
||||
unless ( isNothing newBrushWidgetAction ) $
|
||||
State.put newBrushWidgetAction
|
||||
pure ( set ( field' @"brushParams" ) ( updatePointParams newBrushParams ( brushParams pt ) ) pt )
|
||||
|
|
|
|||
|
|
@ -1,3 +1,5 @@
|
|||
{-# LANGUAGE OverloadedStrings #-}
|
||||
|
||||
module MetaBrush.Brush.Widget
|
||||
( Widget(..)
|
||||
, WidgetElements(..)
|
||||
|
|
@ -5,6 +7,7 @@ module MetaBrush.Brush.Widget
|
|||
, widgetUpdate
|
||||
, WhatScale(..)
|
||||
, WidgetAction(..)
|
||||
, describeWidgetAction
|
||||
)
|
||||
where
|
||||
|
||||
|
|
@ -26,6 +29,10 @@ import Math.Module
|
|||
, norm
|
||||
)
|
||||
|
||||
-- text
|
||||
import Data.Text
|
||||
( Text )
|
||||
|
||||
-- metabrushes
|
||||
import MetaBrush.Records
|
||||
( Record(..) )
|
||||
|
|
@ -94,6 +101,10 @@ data WidgetAction
|
|||
--{ windingNumber :: Int }
|
||||
deriving stock ( Eq, Ord, Show )
|
||||
|
||||
describeWidgetAction :: WidgetAction -> Text
|
||||
describeWidgetAction ( ScaleAction {} ) = "scaling"
|
||||
describeWidgetAction RotateAction = "rotation"
|
||||
|
||||
-- | Given an UI action (moving a widget control element),
|
||||
-- how should we update the brush parameters?
|
||||
widgetUpdate :: Widget flds
|
||||
|
|
@ -121,9 +132,9 @@ widgetUpdate widget mode ( oldPt, newPt ) ( MkR oldFlds ) =
|
|||
-> MkR oldFlds
|
||||
| otherwise
|
||||
->
|
||||
let θ1 = atan2 ( oldPt ^.^ newPt ) ( oldPt × newPt )
|
||||
θ' = nearestAngle θ θ1
|
||||
in MkR $ ℝ3 w h θ'
|
||||
let θ1 = atan2 ( oldPt × newPt ) ( oldPt ^.^ newPt )
|
||||
θ' = θ + nearestAngle 0 θ1
|
||||
in MkR ( ℝ3 w h θ' )
|
||||
|
||||
nearestAngle :: Double -> Double -> Double
|
||||
nearestAngle θ0 θ = θ0 + ( ( θ - θ0 + pi ) `mod'` ( 2 * pi ) - pi )
|
||||
|
|
|
|||
Loading…
Reference in a new issue