create/move/delete guides: drag from ruler area

This commit is contained in:
sheaf 2020-09-06 00:35:00 +02:00
parent 930fa0ebf9
commit 031d72a69b
24 changed files with 892 additions and 461 deletions

View file

@ -109,6 +109,7 @@ executable MetaBrush
, MetaBrush.Context
, MetaBrush.Document
, MetaBrush.Document.Draw
, MetaBrush.Document.Guide
, MetaBrush.Document.Selection
, MetaBrush.Document.Serialise
, MetaBrush.Event

View file

@ -13,6 +13,8 @@ module Main
-- base
import Control.Monad
( void )
import Data.Foldable
( for_ )
import Data.Int
( Int32 )
import System.Exit
@ -61,6 +63,8 @@ import Math.Bezier.Stroke
( StrokePoint(..) )
import Math.Vector2D
( Point2D(..) )
import MetaBrush.Action
( ActionOrigin(..) )
import MetaBrush.Asset.Brushes
( ellipse, rect )
import MetaBrush.Asset.Colours
@ -74,26 +78,28 @@ import MetaBrush.Context
, withCurrentDocument
)
import MetaBrush.Document
( Document(..), Stroke(..)
, FocusState(..)
( Document(..), emptyDocument
, Stroke(..), FocusState(..)
, PointData(..), BrushPointData(..)
)
import MetaBrush.Event
( handleEvents )
import MetaBrush.Render.Document
( renderDocument, blankRender )
( renderDocument, renderGuides, blankRender )
import MetaBrush.UI.FileBar
( FileBar(..), createFileBar )
import MetaBrush.UI.InfoBar
( InfoBar(..), createInfoBar )
( InfoBar(..), createInfoBar, updateInfoBar )
import MetaBrush.UI.Menu
( createMenuBar )
( createMenuBar
--, MenuItem(..), Menu(..), FileMenu(..), EditMenu(..), ViewMenu(..)
)
import MetaBrush.UI.Panels
( createPanelBar )
import MetaBrush.UI.ToolBar
( Tool(..), Mode(..), createToolBar )
import MetaBrush.UI.Viewport
( Viewport(..), createViewport )
( Viewport(..), Ruler(..), createViewport )
import MetaBrush.Unique
( newUniqueSupply
, Unique, unsafeUnique
@ -108,50 +114,35 @@ import qualified Paths_MetaBrush as Cabal
testDocuments :: Map Unique Document
testDocuments = uniqueMapFromList
[ Document
{ displayName = "Closed"
, mbFilePath = Nothing
, unsavedChanges = False
, viewportCenter = Point2D 50 50
, zoomFactor = 1
, documentUnique = unsafeUnique 0
, strokes = [ Stroke
{ strokeName = "Ellipse"
, strokeVisible = True
, strokeUnique = unsafeUnique 10
, strokePoints = ellipse 150 100 ( PointData Normal ( rect 30 6 $ BrushPointData Normal ) )
}
]
[ ( emptyDocument "Closed" ( unsafeUnique 0 ) )
{ strokes =
[ Stroke
{ strokeName = "Ellipse"
, strokeVisible = True
, strokeUnique = unsafeUnique 10
, strokePoints = ellipse 150 100 ( PointData Normal ( rect 30 6 $ BrushPointData Normal ) )
}
]
}
, Document
{ displayName = "Line"
, mbFilePath = Nothing
, unsavedChanges = False
, viewportCenter = Point2D 0 0
, zoomFactor = 1
, documentUnique = unsafeUnique 1
, strokes = [ Stroke
{ strokeName = "Line"
, strokeVisible = True
, strokeUnique = unsafeUnique 11
, strokePoints = linePts
}
]
, ( emptyDocument "Line" ( unsafeUnique 1 ) )
{ strokes =
[ Stroke
{ strokeName = "Line"
, strokeVisible = True
, strokeUnique = unsafeUnique 11
, strokePoints = linePts
}
]
}
, Document
{ displayName = "Short line"
, mbFilePath = Nothing
, unsavedChanges = False
, viewportCenter = Point2D 0 0
, zoomFactor = 1
, documentUnique = unsafeUnique 2
, strokes = [ Stroke
{ strokeName = "ShortLine"
, strokeVisible = True
, strokeUnique = unsafeUnique 12
, strokePoints = linePts2
}
]
, ( emptyDocument "Short line" ( unsafeUnique 2 ) )
{ strokes =
[ Stroke
{ strokeName = "ShortLine"
, strokeVisible = True
, strokeUnique = unsafeUnique 12
, strokePoints = linePts2
}
]
}
]
where
@ -194,7 +185,7 @@ main = do
-- Put all these stateful variables in a record for conciseness.
let
variables :: Variables
variables = Variables { .. }
variables = Variables {..}
---------------------------------------------------------
-- Initialise GTK
@ -292,7 +283,7 @@ main = do
---------------------------------------------------------
-- Main viewport
Viewport { viewportDrawingArea } <- createViewport viewportGrid
viewport@( Viewport { .. } ) <- createViewport viewportGrid
-----------------
-- Viewport rendering
@ -301,22 +292,47 @@ main = do
-- Get the relevant document information
viewportWidth <- GTK.widgetGetAllocatedWidth viewportDrawingArea
viewportHeight <- GTK.widgetGetAllocatedHeight viewportDrawingArea
mbRender <- STM.atomically $ withCurrentDocument variables \ doc@( Document { .. } ) -> do
mbRender <- STM.atomically $ withCurrentDocument variables \ doc@( Document {..} ) -> do
mbMousePos <- STM.readTVar mousePosTVar
mbHoldAction <- STM.readTVar mouseHoldTVar
mbPartialPath <- STM.readTVar partialPathTVar
mode <- STM.readTVar modeTVar
pure $
pure do
renderDocument
colours mode ( viewportWidth, viewportHeight )
mbMousePos mbHoldAction mbPartialPath
doc
renderGuides
colours ( viewportWidth, viewportHeight ) ViewportOrigin ( viewportWidth, viewportHeight )
mbMousePos mbHoldAction
doc
case mbRender of
Just render -> Cairo.renderWithContext render ctx
Nothing -> Cairo.renderWithContext ( blankRender colours ) ctx
pure True
for_ [ ( rulerCornerDrawingArea, RulerCorner )
, ( topRulerDrawingArea, TopRuler )
, ( leftRulerDrawingArea, LeftRuler
) ] \ ( rulerDrawingArea, ruler ) -> do
void $ GTK.onWidgetDraw rulerDrawingArea \ ctx -> do
viewportWidth <- GTK.widgetGetAllocatedWidth viewportDrawingArea
viewportHeight <- GTK.widgetGetAllocatedHeight viewportDrawingArea
width <- GTK.widgetGetAllocatedWidth rulerDrawingArea
height <- GTK.widgetGetAllocatedHeight rulerDrawingArea
mbRender <- STM.atomically $ withCurrentDocument variables \ doc@( Document {..} ) -> do
mbMousePos <- STM.readTVar mousePosTVar
mbHoldAction <- STM.readTVar mouseHoldTVar
pure do
renderGuides
colours ( viewportWidth, viewportHeight ) ( RulerOrigin ruler ) ( width, height )
mbMousePos mbHoldAction
doc
for_ mbRender \ render -> Cairo.renderWithContext render ctx
pure True
---------------------------------------------------------
-- Tool bar
@ -329,12 +345,12 @@ main = do
---------------------------------------------------------
-- File bar
fileBar@( FileBar { fileBarBox } ) <-
createFileBar
colours
variables
window titleBar title viewportDrawingArea infoBar
window titleBar title viewport infoBar
GTK.boxPackStart mainView fileBarBox False False 0
GTK.boxPackStart mainView viewportGrid True True 0
@ -342,12 +358,14 @@ main = do
let
uiElements :: UIElements
uiElements = UIElements { .. }
uiElements = UIElements {..}
------------
-- Menu bar
_ <- createMenuBar uiElements variables colours
_menu <- createMenuBar uiElements variables colours
--GTK.widgetSetSensitive ( menuItem $ close $ menuItemSubmenu $ file menu ) False
---------------------------------------------------------
-- Panels
@ -363,6 +381,7 @@ main = do
-- GTK main loop
GTK.widgetShowAll window
updateInfoBar viewportDrawingArea infoBar variables -- need to update the info bar after widgets have been realized
GTK.main
exitSuccess

View file

@ -75,6 +75,9 @@
.tabScrollbar {
background-color: rgba(48, 45, 38, 0.66);
}
.guide {
color: rgba(28, 196, 79, 0.66)
}
.magnifier {
color: rgb(236, 223, 210);
}
@ -419,3 +422,8 @@ tooltip {
font-size: 10px;
-GtkWidget-window-dragging: true;
}
.infoBarInfo {
margin-left: -4px;
padding-right: 16px;
}

View file

@ -52,12 +52,22 @@ import System.Directory
import System.FilePath
( (</>), (<.>), takeExtension )
-- generic-lens
import Data.Generics.Product.Fields
( field' )
-- gi-gdk
import qualified GI.Gdk as GDK
-- gi-gtk
import qualified GI.Gtk as GTK
-- lens
import Control.Lens
( over, set )
import Control.Lens.At
( ix, at )
-- stm
import qualified Control.Concurrent.STM as STM
( atomically )
@ -74,18 +84,20 @@ import Math.Vector2D
import MetaBrush.Context
( UIElements(..), Variables(..)
, Modifier(..), modifierKey
, HoldAction(..), PartialPath(..)
, HoldAction(..), GuideAction(..), PartialPath(..)
, currentDocument, withCurrentDocument
, PureDocModification(..), DocModification(..)
, modifyingCurrentDocument
, updateTitle
)
import MetaBrush.Document
( Document(..)
( Document(..), Guide(..)
, PointData(..), FocusState(..)
)
import MetaBrush.Document.Draw
( addToAnchor, getOrCreateDrawAnchor, anchorsAreComplementary )
import MetaBrush.Document.Guide
( selectGuide, addGuide )
import MetaBrush.Document.Selection
( SelectionMode(..), selectionMode
, selectAt, selectRectangle
@ -103,6 +115,8 @@ import {-# SOURCE #-} MetaBrush.UI.FileBar
( TabLocation(..), newFileTab, removeFileTab )
import MetaBrush.UI.ToolBar
( Tool(..) )
import MetaBrush.UI.Viewport
( Viewport(..), Ruler(..) )
import MetaBrush.Unique
( Unique )
import MetaBrush.Util
@ -138,7 +152,7 @@ data OpenFile = OpenFile TabLocation
deriving stock Show
instance HandleAction OpenFile where
handleAction uiElts@( UIElements { .. } ) vars@( Variables { .. } ) ( OpenFile tabLoc ) = do
handleAction uiElts@( UIElements {..} ) vars@( Variables {..} ) ( OpenFile tabLoc ) = do
fileChooser <-
GTK.fileChooserNativeNew ( Just "Open MetaBrush document..." ) ( Just window )
GTK.FileChooserActionOpen
@ -167,7 +181,7 @@ data OpenFolder = OpenFolder TabLocation
deriving stock Show
instance HandleAction OpenFolder where
handleAction uiElts@( UIElements { .. } ) vars@( Variables { .. } ) ( OpenFolder tabLoc ) = do
handleAction uiElts@( UIElements {..} ) vars@( Variables {..} ) ( OpenFolder tabLoc ) = do
fileChooser <-
GTK.fileChooserNativeNew ( Just "Select folder..." ) ( Just window )
GTK.FileChooserActionSelectFolder
@ -197,7 +211,7 @@ data Save = Save
deriving stock Show
instance HandleAction Save where
handleAction uiElts@( UIElements { .. } ) vars@( Variables { .. } ) _ =
handleAction uiElts@( UIElements {..} ) vars@( Variables {..} ) _ =
save uiElts vars True
save :: UIElements -> Variables -> Bool -> IO ()
@ -249,7 +263,7 @@ saveAs uiElts vars keepOpen = do
pure $ UpdateDocToAndThen Nothing ( saveDocument savePath doc' )
askForSavePath :: UIElements -> IO ( Maybe FilePath )
askForSavePath ( UIElements { .. } ) = do
askForSavePath ( UIElements {..} ) = do
fileChooser <-
GTK.fileChooserNativeNew ( Just "Save MetaBrush document..." ) ( Just window )
GTK.FileChooserActionSave
@ -287,44 +301,47 @@ pattern SaveAndClose = 2
pattern CancelClose = 3
instance HandleAction Close where
handleAction uiElts@( UIElements { .. } ) vars@( Variables { .. } ) close = do
mbDoc <- case close of
CloseActive -> STM.atomically ( currentDocument vars )
CloseThis unique -> Map.lookup unique <$> STM.readTVarIO openDocumentsTVar
case mbDoc of
Nothing -> pure () -- could show a warning message
Just ( Document { displayName, documentUnique, unsavedChanges } )
| unsavedChanges
-> do
dialog <- GTK.new GTK.MessageDialog []
GTK.setMessageDialogText dialog ( " \n\"" <> displayName <> "\" contains unsaved changes.\nClose anyway?" )
GTK.setMessageDialogMessageType dialog GTK.MessageTypeQuestion
GTK.setWindowResizable dialog False
GTK.setWindowDecorated dialog False
GTK.windowSetTransientFor dialog ( Just window )
GTK.windowSetModal dialog True
widgetAddClasses dialog [ "bg", "plain", "text", "dialog" ]
closeButton <- GTK.dialogAddButton dialog "Close" JustClose
saveButton <- GTK.dialogAddButton dialog "Save and close" SaveAndClose
cancelButton <- GTK.dialogAddButton dialog "Cancel" CancelClose
GTK.dialogSetDefaultResponse dialog 1
for_ [ closeButton, saveButton, cancelButton ] \ button -> widgetAddClass button "dialogButton"
choice <- GTK.dialogRun dialog
GTK.widgetDestroy dialog
case choice of
JustClose -> closeDocument documentUnique
SaveAndClose -> save uiElts vars False
_ -> pure ()
| otherwise
-> closeDocument documentUnique
handleAction
uiElts@( UIElements { viewport = Viewport {..}, .. } )
vars@( Variables {..} )
close = do
mbDoc <- case close of
CloseActive -> STM.atomically ( currentDocument vars )
CloseThis unique -> Map.lookup unique <$> STM.readTVarIO openDocumentsTVar
case mbDoc of
Nothing -> pure () -- could show a warning message
Just ( Document { displayName, documentUnique, unsavedChanges } )
| unsavedChanges
-> do
dialog <- GTK.new GTK.MessageDialog []
GTK.setMessageDialogText dialog ( " \n\"" <> displayName <> "\" contains unsaved changes.\nClose anyway?" )
GTK.setMessageDialogMessageType dialog GTK.MessageTypeQuestion
GTK.setWindowResizable dialog False
GTK.setWindowDecorated dialog False
GTK.windowSetTransientFor dialog ( Just window )
GTK.windowSetModal dialog True
widgetAddClasses dialog [ "bg", "plain", "text", "dialog" ]
closeButton <- GTK.dialogAddButton dialog "Close" JustClose
saveButton <- GTK.dialogAddButton dialog "Save and close" SaveAndClose
cancelButton <- GTK.dialogAddButton dialog "Cancel" CancelClose
GTK.dialogSetDefaultResponse dialog 1
for_ [ closeButton, saveButton, cancelButton ] \ button -> widgetAddClass button "dialogButton"
choice <- GTK.dialogRun dialog
GTK.widgetDestroy dialog
case choice of
JustClose -> closeDocument documentUnique
SaveAndClose -> save uiElts vars False
_ -> pure ()
| otherwise
-> closeDocument documentUnique
where
closeDocument :: Unique -> IO ()
closeDocument unique = do
removeFileTab vars unique
updateTitle window title Nothing
updateInfoBar viewportDrawingArea infoBar vars
GTK.widgetQueueDraw viewportDrawingArea
where
closeDocument :: Unique -> IO ()
closeDocument unique = do
removeFileTab vars unique
updateTitle window title Nothing
updateInfoBar viewportDrawingArea infoBar vars
GTK.widgetQueueDraw viewportDrawingArea
---------------------
-- Switch document --
@ -334,19 +351,22 @@ data SwitchTo = SwitchTo Unique
deriving stock Show
instance HandleAction SwitchTo where
handleAction ( UIElements { .. } ) vars@( Variables { .. } ) ( SwitchTo newUnique ) = do
mbNewDocAndTab <- STM.atomically do
STM.writeTVar activeDocumentTVar ( Just newUnique )
newDoc <- Map.lookup newUnique <$> STM.readTVar openDocumentsTVar
newTab <- Map.lookup newUnique <$> STM.readTVar fileBarTabsTVar
pure ( (,) <$> newDoc <*> newTab )
case mbNewDocAndTab of
Nothing -> updateTitle window title Nothing
Just ( Document { .. }, tab ) -> do
updateTitle window title ( Just ( displayName, unsavedChanges ) )
updateInfoBar viewportDrawingArea infoBar vars
GTK.widgetQueueDraw tab
GTK.widgetQueueDraw viewportDrawingArea
handleAction
( UIElements { viewport = Viewport {..}, .. } )
vars@( Variables {..} )
( SwitchTo newUnique ) = do
mbNewDocAndTab <- STM.atomically do
STM.writeTVar activeDocumentTVar ( Just newUnique )
newDoc <- Map.lookup newUnique <$> STM.readTVar openDocumentsTVar
newTab <- Map.lookup newUnique <$> STM.readTVar fileBarTabsTVar
pure ( (,) <$> newDoc <*> newTab )
case mbNewDocAndTab of
Nothing -> updateTitle window title Nothing
Just ( Document {..}, tab ) -> do
updateTitle window title ( Just ( displayName, unsavedChanges ) )
updateInfoBar viewportDrawingArea infoBar vars
GTK.widgetQueueDraw tab
GTK.widgetQueueDraw viewportDrawingArea
--------------
-- Quitting --
@ -469,8 +489,8 @@ data Confirm = Confirm
instance HandleAction Confirm where
handleAction
( UIElements { viewportDrawingArea } )
( Variables { .. } )
( UIElements { viewport = Viewport {..} } )
( Variables {..} )
_
= do
tool <- STM.readTVarIO toolTVar
@ -504,13 +524,13 @@ data MouseMove = MouseMove ( Point2D Double )
instance HandleAction MouseMove where
handleAction
( UIElements { viewportDrawingArea, infoBar } )
vars@( Variables { mousePosTVar, modifiersTVar, toolTVar, partialPathTVar } )
( UIElements { viewport = Viewport {..}, .. } )
vars@( Variables {..} )
( MouseMove ( Point2D x y ) )
= do
viewportWidth <- fromIntegral @_ @Double <$> GTK.widgetGetAllocatedWidth viewportDrawingArea
viewportHeight <- fromIntegral @_ @Double <$> GTK.widgetGetAllocatedHeight viewportDrawingArea
void . STM.atomically $ withCurrentDocument vars \ ( Document { .. } ) -> do
void . STM.atomically $ withCurrentDocument vars \ ( Document {..} ) -> do
modifiers <- STM.readTVar modifiersTVar
let
toViewport :: Point2D Double -> Point2D Double
@ -532,19 +552,26 @@ instance HandleAction MouseMove where
updateInfoBar viewportDrawingArea infoBar vars
GTK.widgetQueueDraw viewportDrawingArea
for_ [ rulerCornerDrawingArea, topRulerDrawingArea, leftRulerDrawingArea ] \ drawingArea -> do
GTK.widgetQueueDraw drawingArea
-----------------
-- Mouse click --
-----------------
data MouseClick = MouseClick Word32 ( Point2D Double )
data ActionOrigin
= ViewportOrigin
| RulerOrigin Ruler
deriving stock Show
data MouseClick = MouseClick ActionOrigin Word32 ( Point2D Double )
deriving stock Show
instance HandleAction MouseClick where
handleAction
uiElts@( UIElements { viewportDrawingArea } )
vars@( Variables { .. } )
( MouseClick button mouseClickCoords )
uiElts@( UIElements { viewport = Viewport {..} } )
vars@( Variables {..} )
( MouseClick actionOrigin button mouseClickCoords )
= case button of
-- Left mouse button.
@ -558,50 +585,66 @@ instance HandleAction MouseClick where
pos :: Point2D Double
pos = toViewport mouseClickCoords
STM.writeTVar mousePosTVar ( Just pos )
modifiers <- STM.readTVar modifiersTVar
tool <- STM.readTVar toolTVar
mode <- STM.readTVar modeTVar
case tool of
-- Selection mode mouse hold:
--
-- - If holding shift or alt, mouse hold initiates a rectangular selection.
-- - If not holding shift or alt:
-- - if mouse click selected an object, initiate a drag move,
-- - otherwise, initiate a rectangular selection.
Selection ->
case selectionMode modifiers of
-- Drag move: not holding shift or alt, click has selected something.
New
| Just newDoc <- dragMoveSelect mode pos doc
-> do
STM.writeTVar mouseHoldTVar ( Just $ DragMoveHold pos )
pure ( UpdateDocTo $ Just newDoc )
-- Rectangular selection.
_ -> do
STM.writeTVar mouseHoldTVar ( Just $ SelectionHold pos )
pure Don'tModifyDoc
case actionOrigin of
-- Pen tool: start or continue a drawing operation.
Pen -> do
mbPartialPath <- STM.readTVar partialPathTVar
STM.writeTVar mouseHoldTVar ( Just $ DrawHold pos )
case mbPartialPath of
-- No path started yet: find anchor for drawing (existing stroke endpoint, or new stroke).
Nothing -> do
( newDoc, drawAnchor, anchorPt ) <- getOrCreateDrawAnchor uniqueSupply pos doc
STM.writeTVar partialPathTVar
( Just $ PartialPath
{ partialStartPos = anchorPt
, partialControlPoint = Nothing
, partialPathAnchor = drawAnchor
, firstPoint = True
}
)
pure ( UpdateDocTo $ Just newDoc )
-- Path already started: indicate that we are continuing a path.
Just pp -> do
STM.writeTVar partialPathTVar ( Just $ pp { firstPoint = False } )
pure Don'tModifyDoc
ViewportOrigin -> do
modifiers <- STM.readTVar modifiersTVar
tool <- STM.readTVar toolTVar
mode <- STM.readTVar modeTVar
case tool of
-- Selection mode mouse hold:
--
-- - If holding shift or alt, mouse hold initiates a rectangular selection.
-- - If not holding shift or alt:
-- - if mouse click selected an object, initiate a drag move,
-- - otherwise, initiate a rectangular selection.
Selection ->
case selectionMode modifiers of
-- Drag move: not holding shift or alt, click has selected something.
New
| Just newDoc <- dragMoveSelect mode pos doc
-> do
STM.writeTVar mouseHoldTVar ( Just $ DragMoveHold pos )
pure ( UpdateDocTo $ Just newDoc )
-- Rectangular selection.
_ -> do
STM.writeTVar mouseHoldTVar ( Just $ SelectionHold pos )
pure Don'tModifyDoc
-- Pen tool: start or continue a drawing operation.
Pen -> do
mbPartialPath <- STM.readTVar partialPathTVar
STM.writeTVar mouseHoldTVar ( Just $ DrawHold pos )
case mbPartialPath of
-- No path started yet: find anchor for drawing (existing stroke endpoint, or new stroke).
Nothing -> do
( newDoc, drawAnchor, anchorPt ) <- getOrCreateDrawAnchor uniqueSupply pos doc
STM.writeTVar partialPathTVar
( Just $ PartialPath
{ partialStartPos = anchorPt
, partialControlPoint = Nothing
, partialPathAnchor = drawAnchor
, firstPoint = True
}
)
pure ( UpdateDocTo $ Just newDoc )
-- Path already started: indicate that we are continuing a path.
Just pp -> do
STM.writeTVar partialPathTVar ( Just $ pp { firstPoint = False } )
pure Don'tModifyDoc
RulerOrigin ruler -> do
let
mbGuide :: Maybe Guide
mbGuide = selectGuide pos doc
guideAction :: GuideAction
guideAction
| Just guide <- mbGuide
= MoveGuide ( guideUnique guide )
| otherwise
= CreateGuide ruler
STM.writeTVar mouseHoldTVar ( Just $ GuideAction { holdStartPos = pos, guideAction } )
pure Don'tModifyDoc
-- Right mouse button: end partial path.
3 -> do
@ -621,8 +664,8 @@ data MouseRelease = MouseRelease Word32 ( Point2D Double )
instance HandleAction MouseRelease where
handleAction
uiElts@( UIElements { viewportDrawingArea } )
vars@( Variables { .. } )
uiElts@( UIElements { viewport = Viewport {..} } )
vars@( Variables {..} )
( MouseRelease button ( Point2D x y ) )
= case button of
@ -639,101 +682,138 @@ instance HandleAction MouseRelease where
STM.writeTVar mousePosTVar ( Just pos )
modifiers <- STM.readTVar modifiersTVar
mbHoldPos <- STM.swapTVar mouseHoldTVar Nothing
tool <- STM.readTVar toolTVar
mode <- STM.readTVar modeTVar
case tool of
case mbHoldPos of
Just ( GuideAction { holdStartPos = holdStartPos@( Point2D hx hy ), guideAction } ) -> do
newDoc <- case guideAction of
CreateGuide ruler
| createGuide
-> addGuide uniqueSupply ruler pos doc
| otherwise
-> pure doc
where
createGuide :: Bool
createGuide
= x >= 0
&& y >= 0
&& x <= viewportWidth
&& y <= viewportHeight
MoveGuide guideUnique
| keepGuide
-> pure $
over
( field' @"guides" . ix guideUnique . field' @"guidePoint" )
( ( holdStartPos --> pos :: Vector2D Double ) )
doc
| otherwise
-> pure $ set ( field' @"guides" . at guideUnique ) Nothing doc
where
l, t :: Double
Point2D l t = toViewport ( Point2D 0 0 )
keepGuide :: Bool
keepGuide
= ( x >= 0 || hx < l ) -- mouse hold position (hx,hy) is in document coordinates,
&& ( y >= 0 || hy < t ) -- so we must compare it to the point (l,t) instead of (0,0)
&& x <= viewportWidth
&& y <= viewportHeight
pure ( UpdateDocTo ( Just newDoc ) )
_ -> do
Selection -> do
let
selMode :: SelectionMode
selMode = selectionMode modifiers
case mbHoldPos of
Just hold
| DragMoveHold pos0 <- hold
, pos0 /= pos
-> pure ( UpdateDocTo $ Just $ translateSelection mode ( pos0 --> pos ) doc )
| SelectionHold pos0 <- hold
, pos0 /= pos
-> pure ( UpdateDocTo $ Just $ selectRectangle mode selMode pos0 pos doc )
_ -> pure ( UpdateDocTo $ Just $ selectAt mode selMode pos doc )
tool <- STM.readTVar toolTVar
mode <- STM.readTVar modeTVar
Pen -> do
mbPartialPath <- STM.readTVar partialPathTVar
case mbPartialPath of
-- Normal pen mode mouse click should have created an anchor.
-- If no anchor exists, then just ignore the mouse release event.
Nothing -> pure Don'tModifyDoc
-- Mouse click release possibilities:
--
-- - click was on complementary draw stroke draw anchor to close the path,
-- - release at same point as click: finish current segment,
-- - release at different point as click: finish current segment, adding a control point.
Just
( PartialPath
{ partialStartPos = p1
, partialControlPoint = mbCp2
, partialPathAnchor = anchor
, firstPoint
}
) -> do
case tool of
Selection -> do
let
pathPoint :: Point2D Double
mbControlPoint :: Maybe ( Point2D Double )
partialControlPoint :: Maybe ( Point2D Double )
( pathPoint, mbControlPoint, partialControlPoint )
| Just ( DrawHold holdPos ) <- mbHoldPos
= ( holdPos, Just $ ( pos --> holdPos :: Vector2D Double ) holdPos, Just pos )
| otherwise
= ( pos, Nothing, Nothing )
( _, otherAnchor, otherAnchorPt ) <- getOrCreateDrawAnchor uniqueSupply pathPoint doc
if not firstPoint && anchorsAreComplementary anchor otherAnchor
-- Close path.
then do
STM.writeTVar partialPathTVar Nothing
let
newSegment :: Seq ( StrokePoint PointData )
newSegment
= Seq.fromList
$ catMaybes
[ Just ( PathPoint p1 ( PointData Normal Empty ) )
, do
cp <- mbCp2
guard ( cp /= p1 )
pure $ ControlPoint cp ( PointData Normal Empty )
, do
cp <- mbControlPoint
guard ( cp /= otherAnchorPt )
pure $ ControlPoint cp ( PointData Normal Empty )
, Just ( PathPoint otherAnchorPt ( PointData Normal Empty ) )
]
pure ( UpdateDocTo $ Just $ addToAnchor anchor newSegment doc )
else
if firstPoint
-- Continue current partial path.
then do
STM.writeTVar partialPathTVar ( Just $ PartialPath p1 partialControlPoint anchor False )
pure Don'tModifyDoc
-- Finish current partial path.
else do
STM.writeTVar partialPathTVar ( Just $ PartialPath pathPoint partialControlPoint anchor False )
let
newSegment :: Seq ( StrokePoint PointData )
newSegment
= Seq.fromList
$ catMaybes
[ Just ( PathPoint p1 ( PointData Normal Empty ) )
, do
cp <- mbCp2
guard ( cp /= p1 )
pure $ ControlPoint cp ( PointData Normal Empty )
, do
cp <- mbControlPoint
guard ( cp /= pathPoint )
pure $ ControlPoint cp ( PointData Normal Empty )
, Just ( PathPoint pathPoint ( PointData Normal Empty ) )
]
pure ( UpdateDocTo $ Just $ addToAnchor anchor newSegment doc )
selMode :: SelectionMode
selMode = selectionMode modifiers
case mbHoldPos of
Just hold
| DragMoveHold pos0 <- hold
, pos0 /= pos
-> pure ( UpdateDocTo $ Just $ translateSelection mode ( pos0 --> pos ) doc )
| SelectionHold pos0 <- hold
, pos0 /= pos
-> pure ( UpdateDocTo $ Just $ selectRectangle mode selMode pos0 pos doc )
_ -> pure ( UpdateDocTo $ Just $ selectAt mode selMode pos doc )
Pen -> do
mbPartialPath <- STM.readTVar partialPathTVar
case mbPartialPath of
-- Normal pen mode mouse click should have created an anchor.
-- If no anchor exists, then just ignore the mouse release event.
Nothing -> pure Don'tModifyDoc
-- Mouse click release possibilities:
--
-- - click was on complementary draw stroke draw anchor to close the path,
-- - release at same point as click: finish current segment,
-- - release at different point as click: finish current segment, adding a control point.
Just
( PartialPath
{ partialStartPos = p1
, partialControlPoint = mbCp2
, partialPathAnchor = anchor
, firstPoint
}
) -> do
let
pathPoint :: Point2D Double
mbControlPoint :: Maybe ( Point2D Double )
partialControlPoint :: Maybe ( Point2D Double )
( pathPoint, mbControlPoint, partialControlPoint )
| Just ( DrawHold holdPos ) <- mbHoldPos
= ( holdPos, Just $ ( pos --> holdPos :: Vector2D Double ) holdPos, Just pos )
| otherwise
= ( pos, Nothing, Nothing )
( _, otherAnchor, otherAnchorPt ) <- getOrCreateDrawAnchor uniqueSupply pathPoint doc
if not firstPoint && anchorsAreComplementary anchor otherAnchor
-- Close path.
then do
STM.writeTVar partialPathTVar Nothing
let
newSegment :: Seq ( StrokePoint PointData )
newSegment
= Seq.fromList
$ catMaybes
[ Just ( PathPoint p1 ( PointData Normal Empty ) )
, do
cp <- mbCp2
guard ( cp /= p1 )
pure $ ControlPoint cp ( PointData Normal Empty )
, do
cp <- mbControlPoint
guard ( cp /= otherAnchorPt )
pure $ ControlPoint cp ( PointData Normal Empty )
, Just ( PathPoint otherAnchorPt ( PointData Normal Empty ) )
]
pure ( UpdateDocTo $ Just $ addToAnchor anchor newSegment doc )
else
if firstPoint
-- Continue current partial path.
then do
STM.writeTVar partialPathTVar ( Just $ PartialPath p1 partialControlPoint anchor False )
pure Don'tModifyDoc
-- Finish current partial path.
else do
STM.writeTVar partialPathTVar ( Just $ PartialPath pathPoint partialControlPoint anchor False )
let
newSegment :: Seq ( StrokePoint PointData )
newSegment
= Seq.fromList
$ catMaybes
[ Just ( PathPoint p1 ( PointData Normal Empty ) )
, do
cp <- mbCp2
guard ( cp /= p1 )
pure $ ControlPoint cp ( PointData Normal Empty )
, do
cp <- mbControlPoint
guard ( cp /= pathPoint )
pure $ ControlPoint cp ( PointData Normal Empty )
, Just ( PathPoint pathPoint ( PointData Normal Empty ) )
]
pure ( UpdateDocTo $ Just $ addToAnchor anchor newSegment doc )
-- Other mouse buttons: ignored (for the moment at least).
_ -> pure ()
@ -746,59 +826,62 @@ data Scroll = Scroll ( Point2D Double ) ( Vector2D Double )
deriving stock Show
instance HandleAction Scroll where
handleAction uiElts@( UIElements { .. } ) vars@( Variables { .. } ) ( Scroll ( Point2D x y ) ( Vector2D dx dy ) ) = do
handleAction
uiElts@( UIElements { viewport = Viewport {..}, .. } )
vars@( Variables {..} )
( Scroll ( Point2D x y ) ( Vector2D dx dy ) ) = do
viewportWidth <- fromIntegral @_ @Double <$> GTK.widgetGetAllocatedWidth viewportDrawingArea
viewportHeight <- fromIntegral @_ @Double <$> GTK.widgetGetAllocatedHeight viewportDrawingArea
viewportWidth <- fromIntegral @_ @Double <$> GTK.widgetGetAllocatedWidth viewportDrawingArea
viewportHeight <- fromIntegral @_ @Double <$> GTK.widgetGetAllocatedHeight viewportDrawingArea
unless ( dx == 0 && dy == 0 ) do
modifyingCurrentDocument uiElts vars \ ( doc@( Document { viewportCenter = oldCenter, zoomFactor = oldZoomFactor } ) ) -> do
modifiers <- STM.readTVar modifiersTVar
let
toViewport :: Point2D Double -> Point2D Double
toViewport = toViewportCoordinates oldZoomFactor ( viewportWidth, viewportHeight ) oldCenter
-- Mouse position in the coordinate system of the document (not the drawing area GTK coordinates)
mousePos :: Point2D Double
mousePos = toViewport ( Point2D x y )
newDoc :: Document
newDoc
-- Zooming using 'Control'.
| any ( \ case { Control _ -> True; _ -> False } ) modifiers
= let
newZoomFactor :: Double
newZoomFactor
| dy > 0
= max 0.0078125 ( oldZoomFactor / sqrt 2 )
| otherwise
= min 256 ( oldZoomFactor * sqrt 2 )
newCenter :: Point2D Double
newCenter
= ( 1 - oldZoomFactor / newZoomFactor ) *^ ( oldCenter --> mousePos :: Vector2D Double )
oldCenter
in doc { zoomFactor = newZoomFactor, viewportCenter = newCenter }
-- Vertical scrolling turned into horizontal scrolling using 'Shift'.
| dx == 0 && any ( \ case { Shift _ -> True; _ -> False } ) modifiers
= let
newCenter :: Point2D Double
newCenter = ( ( 25 / oldZoomFactor ) *^ Vector2D dy 0 ) oldCenter
in doc { viewportCenter = newCenter }
-- Vertical scrolling.
| otherwise
= let
newCenter :: Point2D Double
newCenter = ( ( 25 / oldZoomFactor ) *^ Vector2D dx dy ) oldCenter
in doc { viewportCenter = newCenter }
finalZoomFactor :: Double
finalZoomFactor = zoomFactor newDoc
finalCenter :: Point2D Double
finalCenter = viewportCenter newDoc
toFinalViewport :: Point2D Double -> Point2D Double
toFinalViewport = toViewportCoordinates finalZoomFactor ( viewportWidth, viewportHeight ) finalCenter
finalMousePos :: Point2D Double
finalMousePos = toFinalViewport ( Point2D x y )
STM.writeTVar mousePosTVar ( Just finalMousePos )
pure ( UpdateDocTo $ Just newDoc )
updateInfoBar viewportDrawingArea infoBar vars
unless ( dx == 0 && dy == 0 ) do
modifyingCurrentDocument uiElts vars \ ( doc@( Document { viewportCenter = oldCenter, zoomFactor = oldZoomFactor } ) ) -> do
modifiers <- STM.readTVar modifiersTVar
let
toViewport :: Point2D Double -> Point2D Double
toViewport = toViewportCoordinates oldZoomFactor ( viewportWidth, viewportHeight ) oldCenter
-- Mouse position in the coordinate system of the document (not the drawing area GTK coordinates)
mousePos :: Point2D Double
mousePos = toViewport ( Point2D x y )
newDoc :: Document
newDoc
-- Zooming using 'Control'.
| any ( \ case { Control _ -> True; _ -> False } ) modifiers
= let
newZoomFactor :: Double
newZoomFactor
| dy > 0
= max 0.0078125 ( oldZoomFactor / sqrt 2 )
| otherwise
= min 256 ( oldZoomFactor * sqrt 2 )
newCenter :: Point2D Double
newCenter
= ( 1 - oldZoomFactor / newZoomFactor ) *^ ( oldCenter --> mousePos :: Vector2D Double )
oldCenter
in doc { zoomFactor = newZoomFactor, viewportCenter = newCenter }
-- Vertical scrolling turned into horizontal scrolling using 'Shift'.
| dx == 0 && any ( \ case { Shift _ -> True; _ -> False } ) modifiers
= let
newCenter :: Point2D Double
newCenter = ( ( 25 / oldZoomFactor ) *^ Vector2D dy 0 ) oldCenter
in doc { viewportCenter = newCenter }
-- Vertical scrolling.
| otherwise
= let
newCenter :: Point2D Double
newCenter = ( ( 25 / oldZoomFactor ) *^ Vector2D dx dy ) oldCenter
in doc { viewportCenter = newCenter }
finalZoomFactor :: Double
finalZoomFactor = zoomFactor newDoc
finalCenter :: Point2D Double
finalCenter = viewportCenter newDoc
toFinalViewport :: Point2D Double -> Point2D Double
toFinalViewport = toViewportCoordinates finalZoomFactor ( viewportWidth, viewportHeight ) finalCenter
finalMousePos :: Point2D Double
finalMousePos = toFinalViewport ( Point2D x y )
STM.writeTVar mousePosTVar ( Just finalMousePos )
pure ( UpdateDocTo $ Just newDoc )
updateInfoBar viewportDrawingArea infoBar vars
--------------------
-- Keyboard press --
@ -808,47 +891,50 @@ data KeyboardPress = KeyboardPress Word32
deriving stock Show
instance HandleAction KeyboardPress where
handleAction uiElts@( UIElements { .. } ) vars@( Variables { .. } ) ( KeyboardPress keyCode ) = do
handleAction
uiElts@( UIElements { viewport = Viewport {..}, .. } )
vars@( Variables {..} )
( KeyboardPress keyCode ) = do
modifiers <- STM.atomically do
!modifiers <- STM.readTVar modifiersTVar
for_ ( modifierKey keyCode ) \ modifier ->
( STM.writeTVar modifiersTVar ( Set.insert modifier modifiers ) )
pure modifiers
modifiers <- STM.atomically do
!modifiers <- STM.readTVar modifiersTVar
for_ ( modifierKey keyCode ) \ modifier ->
( STM.writeTVar modifiersTVar ( Set.insert modifier modifiers ) )
pure modifiers
case keyCode of
case keyCode of
GDK.KEY_Escape -> handleAction uiElts vars Quit
GDK.KEY_Escape -> handleAction uiElts vars Quit
GDK.KEY_Return -> handleAction uiElts vars Confirm
GDK.KEY_Return -> handleAction uiElts vars Confirm
ctrl
| ctrl == GDK.KEY_Control_L || ctrl == GDK.KEY_Control_R
-> do
----------------------------------------------------------
-- With the pen tool, pressing control moves
-- the partial point control point to the mouse position.
tool <- STM.readTVarIO toolTVar
mbMousePos <- STM.readTVarIO mousePosTVar
mbPartialPath <- STM.readTVarIO partialPathTVar
case tool of
Pen
| Just mp <- mbMousePos
, Just pp <- mbPartialPath
-> do
STM.atomically $ STM.writeTVar partialPathTVar ( Just $ pp { partialControlPoint = Just mp } )
GTK.widgetQueueDraw viewportDrawingArea
_ -> pure ()
ctrl
| ctrl == GDK.KEY_Control_L || ctrl == GDK.KEY_Control_R
-> do
----------------------------------------------------------
-- With the pen tool, pressing control moves
-- the partial point control point to the mouse position.
tool <- STM.readTVarIO toolTVar
mbMousePos <- STM.readTVarIO mousePosTVar
mbPartialPath <- STM.readTVarIO partialPathTVar
case tool of
Pen
| Just mp <- mbMousePos
, Just pp <- mbPartialPath
-> do
STM.atomically $ STM.writeTVar partialPathTVar ( Just $ pp { partialControlPoint = Just mp } )
GTK.widgetQueueDraw viewportDrawingArea
_ -> pure ()
-- todo: these should be handled by accelerator,
-- but those are not working currently
GDK.KEY_Delete -> handleAction uiElts vars Delete
-- todo: these should be handled by accelerator,
-- but those are not working currently
GDK.KEY_Delete -> handleAction uiElts vars Delete
GDK.KEY_s
| any ( \case { Control _ -> True; _ -> False } ) modifiers
-> handleAction uiElts vars Save
GDK.KEY_s
| any ( \case { Control _ -> True; _ -> False } ) modifiers
-> handleAction uiElts vars Save
_ -> pure ()
_ -> pure ()
----------------------
-- Keyboard release --

View file

@ -22,7 +22,7 @@ import MetaBrush.Util
-- | "Close tab" button.
drawCloseTabButton :: Colours -> Bool -> [ GTK.StateFlags ] -> Cairo.Render Bool
drawCloseTabButton ( Colours { .. } ) unsavedChanges flags = do
drawCloseTabButton ( Colours {..} ) unsavedChanges flags = do
Cairo.setLineCap Cairo.LineCapRound
Cairo.setLineJoin Cairo.LineJoinMiter

View file

@ -36,7 +36,7 @@ data ColourRecord a
, path, brush, brushStroke, brushCenter
, pointHover, pointSelected
, viewport, viewportScrollbar, tabScrollbar
, magnifier, glass
, guide, magnifier, glass
, selected, selectedOutline :: !a
}
deriving stock ( Show, Functor, Foldable, Traversable )
@ -78,6 +78,7 @@ colourNames = Colours
, viewport = ColourName "viewport" BackgroundColour [ GTK.StateFlagsNormal ]
, viewportScrollbar = ColourName "viewportScrollbar" BackgroundColour [ GTK.StateFlagsNormal ]
, tabScrollbar = ColourName "tabScrollbar" BackgroundColour [ GTK.StateFlagsNormal ]
, guide = ColourName "guide" Colour [ GTK.StateFlagsNormal ]
, magnifier = ColourName "magnifier" Colour [ GTK.StateFlagsNormal ]
, glass = ColourName "glass" Colour [ GTK.StateFlagsNormal ]
, selected = ColourName "selected" Colour [ GTK.StateFlagsNormal ]
@ -88,7 +89,7 @@ type Colours = ColourRecord GDK.RGBA
getColours :: GTK.WidgetPath -> IO Colours
getColours windowWidgetPath =
for colourNames \ ( ColourName { .. } ) -> do
for colourNames \ ( ColourName {..} ) -> do
style <- GTK.styleContextNew
GTK.styleContextSetPath style windowWidgetPath
GTK.styleContextAddClass style colourName

View file

@ -100,7 +100,7 @@ drawMeta ( Colours { splash } ) = do
-- | Path icon. Width = 40 height = 40.
drawPath :: Colours -> Cairo.Render Bool
drawPath ( Colours { .. } ) = do
drawPath ( Colours {..} ) = do
Cairo.setLineCap Cairo.LineCapRound
Cairo.setLineJoin Cairo.LineJoinMiter

View file

@ -11,7 +11,7 @@
module MetaBrush.Context
( UIElements(..), Variables(..)
, LR(..), Modifier(..), modifierKey, modifierType
, HoldAction(..), PartialPath(..)
, HoldAction(..), GuideAction(..), PartialPath(..)
, currentDocument, withCurrentDocument
, PureDocModification(..), DocModification(..)
, modifyingCurrentDocument
@ -76,6 +76,8 @@ import {-# SOURCE #-} MetaBrush.UI.InfoBar
( InfoBar, updateInfoBar )
import MetaBrush.UI.ToolBar
( Tool, Mode )
import MetaBrush.UI.Viewport
( Viewport(..), Ruler(..) )
import MetaBrush.Unique
( UniqueSupply, Unique )
import MetaBrush.Util
@ -85,13 +87,13 @@ import MetaBrush.Util
data UIElements
= UIElements
{ window :: !GTK.Window
, title :: !GTK.Label
, titleBar :: !GTK.Box
, fileBar :: !FileBar
, viewportDrawingArea :: !GTK.DrawingArea
, infoBar :: !InfoBar
, colours :: !Colours
{ window :: !GTK.Window
, title :: !GTK.Label
, titleBar :: !GTK.Box
, fileBar :: !FileBar
, viewport :: !Viewport
, infoBar :: !InfoBar
, colours :: !Colours
}
data Variables
@ -133,15 +135,25 @@ modifierType ( Control _ ) = GDK.ModifierTypeControlMask
modifierType ( Alt _ ) = GDK.ModifierTypeMod1Mask
modifierType ( Shift _ ) = GDK.ModifierTypeShiftMask
data GuideAction
= CreateGuide !Ruler
| MoveGuide !Unique
deriving stock Show
-- | Keep track of a mouse hold action:
--
-- - start a rectangular selection,
-- - move objects by dragging,
-- - drawing a control point.
-- - drawing a control point,
-- - create/modify a guide.
data HoldAction
= SelectionHold { holdStartPos :: !( Point2D Double ) }
| DragMoveHold { holdStartPos :: !( Point2D Double ) }
| DrawHold { holdStartPos :: !( Point2D Double ) }
| GuideAction { holdStartPos :: !( Point2D Double )
, guideAction :: !GuideAction
}
deriving stock Show
-- | Keep track of a path that is in the middle of being drawn.
@ -197,7 +209,7 @@ instance DocumentModification DocModification where
--
-- Does nothing if no document is currently active.
modifyingCurrentDocument :: DocumentModification modif => UIElements -> Variables -> ( Document -> STM modif ) -> IO ()
modifyingCurrentDocument ( UIElements { .. } ) vars@( Variables { .. } ) f = do
modifyingCurrentDocument ( UIElements { viewport = Viewport {..}, .. } ) vars@( Variables {..} ) f = do
mbAction <- STM.atomically . runMaybeT $ do
unique <- MaybeT ( STM.readTVar activeDocumentTVar )
oldDoc <- MaybeT ( Map.lookup unique <$> STM.readTVar openDocumentsTVar )
@ -219,6 +231,8 @@ modifyingCurrentDocument ( UIElements { .. } ) vars@( Variables { .. } ) f = do
Just ( Document { displayName, unsavedChanges } ) -> do
updateTitle window title ( Just ( displayName, unsavedChanges ) )
GTK.widgetQueueDraw viewportDrawingArea
for_ [ rulerCornerDrawingArea, topRulerDrawingArea, leftRulerDrawingArea ] \ drawingArea -> do
GTK.widgetQueueDraw drawingArea
for_ mbActiveTab GTK.widgetQueueDraw
sequenceAOf_ actionFold modif
sequenceA_ mbAction

View file

@ -9,7 +9,7 @@
module MetaBrush.Document
( AABB(..)
, Document(..), emptyDocument
, Stroke(..)
, Stroke(..), Guide(..)
, PointData(..), BrushPointData(..)
, FocusState(..)
, _selection, _brush
@ -21,6 +21,10 @@ import GHC.Generics
( Generic )
-- containers
import Data.Map.Strict
( Map )
import qualified Data.Map.Strict as Map
( empty )
import Data.Sequence
( Seq )
@ -42,7 +46,7 @@ import Data.Text
import Math.Bezier.Stroke
( StrokePoint(..) )
import Math.Vector2D
( Point2D(..) )
( Point2D(..), Vector2D(..) )
import MetaBrush.Unique
( Unique )
@ -62,6 +66,7 @@ data Document
, zoomFactor :: !Double
, documentUnique :: Unique
, strokes :: ![ Stroke ]
, guides :: !( Map Unique Guide )
}
deriving stock ( Show, Generic )
@ -74,6 +79,14 @@ data Stroke
}
deriving stock ( Show, Generic )
data Guide
= Guide
{ guidePoint :: !( Point2D Double ) -- ^ point on the guide line
, guideNormal :: !( Vector2D Double ) -- ^ /normalised/ normal vector of the guide
, guideUnique :: Unique
}
deriving stock ( Show, Generic )
data PointData
= PointData
{ pointState :: FocusState
@ -108,4 +121,5 @@ emptyDocument docName unique =
, zoomFactor = 1
, documentUnique = unique
, strokes = []
, guides = Map.empty
}

View file

@ -0,0 +1,91 @@
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE TypeApplications #-}
module MetaBrush.Document.Guide
( selectGuide, addGuide )
where
-- base
import Data.Semigroup
( Arg(..), Min(..), ArgMin )
-- acts
import Data.Act
( Torsor((-->)) )
-- containers
import Data.Map.Strict
( Map )
import qualified Data.Map.Strict as Map
( insert )
-- generic-lens
import Data.Generics.Product.Fields
( field' )
-- stm
import Control.Concurrent.STM
( STM )
-- MetaBrush
import Math.Module
( Inner((^.^)), squaredNorm )
import Math.Vector2D
( Point2D(..), Vector2D(..) )
import MetaBrush.Document
( Document(..), Guide(..)
)
import MetaBrush.UI.Viewport
( Ruler(..) )
import MetaBrush.Unique
( UniqueSupply, Unique, freshUnique )
--------------------------------------------------------------------------------
-- | Try to select a guide at the given document coordinates.
selectGuide :: Point2D Double -> Document -> Maybe Guide
selectGuide c ( Document { zoomFactor, guides } ) = \case { Min ( Arg _ g ) -> g } <$> foldMap f guides
where
f :: Guide -> Maybe ( ArgMin Double Guide )
f guide@( Guide { guidePoint = p, guideNormal = n } )
| sqDist * zoomFactor ^ ( 2 :: Int ) < 4
= Just ( Min ( Arg sqDist guide ) )
| otherwise
= Nothing
where
t :: Double
t = ( c --> p ) ^.^ n
sqDist :: Double
sqDist = t ^ ( 2 :: Int ) / squaredNorm n
-- | Add new guide after a mouse drag from a ruler area.
addGuide :: UniqueSupply -> Ruler -> Point2D Double -> Document -> STM Document
addGuide uniqueSupply ruler p = ( field' @"guides" ) insertNewGuides
where
insertNewGuides :: Map Unique Guide -> STM ( Map Unique Guide )
insertNewGuides gs = case ruler of
RulerCorner
-> do
uniq1 <- freshUnique uniqueSupply
uniq2 <- freshUnique uniqueSupply
let
guide1, guide2 :: Guide
guide1 = Guide { guidePoint = p, guideNormal = Vector2D 0 1, guideUnique = uniq1 }
guide2 = Guide { guidePoint = p, guideNormal = Vector2D 1 0, guideUnique = uniq2 }
pure ( Map.insert uniq2 guide2 . Map.insert uniq1 guide1 $ gs )
TopRuler
-> do
uniq1 <- freshUnique uniqueSupply
let
guide1 :: Guide
guide1 = Guide { guidePoint = p, guideNormal = Vector2D 0 1, guideUnique = uniq1 }
pure ( Map.insert uniq1 guide1 gs )
LeftRuler
-> do
uniq2 <- freshUnique uniqueSupply
let
guide2 :: Guide
guide2 = Guide { guidePoint = p, guideNormal = Vector2D 1 0, guideUnique = uniq2 }
pure ( Map.insert uniq2 guide2 gs )

View file

@ -1,4 +1,5 @@
{-# LANGUAGE BlockArguments #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
@ -11,6 +12,8 @@ module MetaBrush.Document.Serialise
where
-- base
import Control.Arrow
( (&&&) )
import Control.Monad
( unless )
import qualified Data.Bifunctor as Bifunctor
@ -39,6 +42,10 @@ import qualified Data.ByteString.Lazy.Builder as Lazy.ByteString.Builder
( toLazyByteString )
-- containers
import Data.Map.Strict
( Map )
import qualified Data.Map.Strict as Map
( fromList, elems )
import Data.Sequence
( Seq )
import qualified Data.Sequence as Seq
@ -52,6 +59,14 @@ import System.Directory
import System.FilePath
( takeDirectory )
-- generic-lens
import Data.Generics.Product.Typed
( HasType(typed) )
-- lens
import Control.Lens
( view )
-- scientific
import qualified Data.Scientific as Scientific
( fromFloatDigits, toRealFloat )
@ -102,16 +117,17 @@ import qualified Waargonaut.Prettier as TonyMorris
import Math.Bezier.Stroke
( StrokePoint(..) )
import Math.Vector2D
( Point2D(..) )
( Point2D(..), Vector2D(..) )
import MetaBrush.Document
( Document(..)
, Stroke(..)
, Guide(..)
, PointData(..)
, BrushPointData(..)
, FocusState(..)
)
import MetaBrush.Unique
( UniqueSupply, freshUnique )
( Unique, UniqueSupply, freshUnique )
--------------------------------------------------------------------------------
@ -176,7 +192,7 @@ decodePoint2D :: Monad m => JSON.Decoder m a -> JSON.Decoder m ( Point2D a )
decodePoint2D dec = Point2D <$> JSON.Decoder.atKey "x" dec <*> JSON.Decoder.atKey "y" dec
{-
encodeVector2D :: Applicative f => JSON.Encoder' a -> JSON.Encoder f ( Vector2D a )
encodeVector2D enc = JSON.Encoder.mapLikeObj \ ( Vector2D x y ) ->
JSON.Encoder.atKey' "x" enc x
@ -186,7 +202,7 @@ decodeVector2D :: Monad m => JSON.Decoder m a -> JSON.Decoder m ( Vector2D a )
decodeVector2D dec = Vector2D <$> JSON.Decoder.atKey "x" dec <*> JSON.Decoder.atKey "y" dec
{-
encodeMat22 :: Applicative f => JSON.Encoder' a -> JSON.Encoder f ( Mat22 a )
encodeMat22 enc = JSON.Encoder.mapLikeObj \ ( Mat22 m00 m01 m10 m11 ) ->
JSON.Encoder.atKey' "m00" enc m00
@ -282,6 +298,14 @@ decodeSequence dec = Seq.fromList <$> JSON.Decoder.list dec
encodeUniqueMap :: Applicative f => JSON.Encoder f a -> JSON.Encoder f ( Map Unique a )
encodeUniqueMap enc = contramap Map.elems ( JSON.Encoder.list enc )
decodeUniqueMap :: ( Monad m, HasType Unique a ) => JSON.Decoder m a -> JSON.Decoder m ( Map Unique a )
decodeUniqueMap dec = Map.fromList . map ( view typed &&& id ) <$> JSON.Decoder.list dec
encodePointData :: Applicative f => JSON.Encoder f PointData
encodePointData = JSON.Encoder.mapLikeObj \ ( PointData { pointState, brushShape } ) ->
JSON.Encoder.atKey' "focus" encodeFocusState pointState
@ -311,12 +335,27 @@ decodeStroke uniqueSupply = do
encodeGuide :: Applicative f => JSON.Encoder f Guide
encodeGuide = JSON.Encoder.mapLikeObj \ ( Guide { guidePoint, guideNormal } ) ->
JSON.Encoder.atKey' "point" ( encodePoint2D encodeDouble ) guidePoint
. JSON.Encoder.atKey' "normal" ( encodeVector2D encodeDouble ) guideNormal
decodeGuide :: MonadIO m => UniqueSupply -> JSON.Decoder m Guide
decodeGuide uniqueSupply = do
guidePoint <- JSON.Decoder.atKey "point" ( decodePoint2D decodeDouble )
guideNormal <- JSON.Decoder.atKey "normal" ( decodeVector2D decodeDouble )
guideUnique <- lift ( liftIO . STM.atomically $ freshUnique uniqueSupply )
pure ( Guide { guidePoint, guideNormal, guideUnique } )
encodeDocument :: Applicative f => JSON.Encoder f Document
encodeDocument = JSON.Encoder.mapLikeObj \ ( Document { displayName, viewportCenter, zoomFactor, strokes } ) ->
encodeDocument = JSON.Encoder.mapLikeObj \ ( Document { displayName, viewportCenter, zoomFactor, strokes, guides } ) ->
JSON.Encoder.atKey' "name" JSON.Encoder.text displayName
. JSON.Encoder.atKey' "center" ( encodePoint2D encodeDouble ) viewportCenter
. JSON.Encoder.atKey' "zoom" encodeDouble zoomFactor
. JSON.Encoder.atKey' "strokes" ( JSON.Encoder.list encodeStroke ) strokes
. JSON.Encoder.atKey' "strokes" ( encodeUniqueMap encodeGuide ) guides
decodeDocument :: MonadIO m => UniqueSupply -> Maybe FilePath -> JSON.Decoder m Document
decodeDocument uniqueSupply mbFilePath = do
@ -328,4 +367,5 @@ decodeDocument uniqueSupply mbFilePath = do
zoomFactor <- JSON.Decoder.atKey "zoom" decodeDouble
documentUnique <- lift ( liftIO . STM.atomically $ freshUnique uniqueSupply )
strokes <- JSON.Decoder.atKey "strokes" ( JSON.Decoder.list ( decodeStroke uniqueSupply ) )
pure ( Document { displayName, mbFilePath, unsavedChanges, viewportCenter, zoomFactor, documentUnique, strokes } )
guides <- JSON.Decoder.atKey "guides" ( decodeUniqueMap ( decodeGuide uniqueSupply ) )
pure ( Document { displayName, mbFilePath, unsavedChanges, viewportCenter, zoomFactor, documentUnique, strokes, guides } )

View file

@ -1,9 +1,15 @@
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE DerivingStrategies #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE TypeApplications #-}
module MetaBrush.Event
( handleEvents )
where
-- base
import Control.Monad
( void )
-- gi-gdk
import qualified GI.Gdk as GDK
@ -15,68 +21,96 @@ import Math.Vector2D
( Point2D(..), Vector2D(..) )
import MetaBrush.Action
( HandleAction(..)
, ActionOrigin(..)
, MouseMove(..), MouseClick(..), MouseRelease(..)
, Scroll(..), KeyboardPress(..), KeyboardRelease(..)
, quitEverything
)
import MetaBrush.Context
( UIElements(..), Variables(..) )
import MetaBrush.UI.Viewport
( Viewport(..), Ruler(..) )
--------------------------------------------------------------------------------
handleEvents :: UIElements -> Variables -> IO ()
handleEvents elts@( UIElements { window, viewportDrawingArea } ) vars = do
handleEvents elts@( UIElements { viewport = Viewport {..}, .. } ) vars = do
-- Mouse events
_ <- GTK.onWidgetMotionNotifyEvent viewportDrawingArea ( handleMotionEvent elts vars )
_ <- GTK.onWidgetScrollEvent viewportDrawingArea ( handleScrollEvent elts vars )
_ <- GTK.onWidgetButtonPressEvent viewportDrawingArea ( handleMouseButtonEvent elts vars )
_ <- GTK.onWidgetButtonReleaseEvent viewportDrawingArea ( handleMouseButtonRelease elts vars )
onWidgetMouseEvent viewportDrawingArea ViewportOrigin
onWidgetMouseEvent rulerCornerDrawingArea ( RulerOrigin RulerCorner )
onWidgetMouseEvent leftRulerDrawingArea ( RulerOrigin LeftRuler )
onWidgetMouseEvent topRulerDrawingArea ( RulerOrigin TopRuler )
-- Keyboard events
_ <- GTK.onWidgetKeyPressEvent window ( handleKeyboardPressEvent elts vars )
_ <- GTK.onWidgetKeyReleaseEvent window ( handleKeyboardReleaseEvent elts vars )
void $ GTK.onWidgetKeyPressEvent window ( handleKeyboardPressEvent elts vars )
void $ GTK.onWidgetKeyReleaseEvent window ( handleKeyboardReleaseEvent elts vars )
-- Window quit
_ <- GTK.onWidgetDestroy window ( quitEverything window )
void $ GTK.onWidgetDestroy window ( quitEverything window )
pure ()
where
onWidgetMouseEvent :: GTK.DrawingArea -> ActionOrigin -> IO ()
onWidgetMouseEvent drawingArea eventOrigin = do
void $ GTK.onWidgetMotionNotifyEvent drawingArea ( handleMotionEvent elts vars eventOrigin )
void $ GTK.onWidgetScrollEvent drawingArea ( handleScrollEvent elts vars eventOrigin )
void $ GTK.onWidgetButtonPressEvent drawingArea ( handleMouseButtonEvent elts vars eventOrigin )
void $ GTK.onWidgetButtonReleaseEvent drawingArea ( handleMouseButtonRelease elts vars eventOrigin )
--------------------------------------------------------------------------------
-- Mouse events.
handleMotionEvent :: UIElements -> Variables -> GDK.EventMotion -> IO Bool
handleMotionEvent elts vars eventMotion = do
handleMotionEvent :: UIElements -> Variables -> ActionOrigin -> GDK.EventMotion -> IO Bool
handleMotionEvent elts vars eventOrigin eventMotion = do
x <- GDK.getEventMotionX eventMotion
y <- GDK.getEventMotionY eventMotion
handleAction elts vars ( MouseMove ( Point2D x y ) )
mousePos <- adjustMousePosition ( viewport elts ) eventOrigin ( Point2D x y )
handleAction elts vars ( MouseMove mousePos )
pure True
handleScrollEvent :: UIElements -> Variables -> GDK.EventScroll -> IO Bool
handleScrollEvent elts vars scrollEvent = do
handleScrollEvent :: UIElements -> Variables -> ActionOrigin -> GDK.EventScroll -> IO Bool
handleScrollEvent elts vars eventOrigin scrollEvent = do
dx <- GDK.getEventScrollDeltaX scrollEvent
dy <- GDK.getEventScrollDeltaY scrollEvent
x <- GDK.getEventScrollX scrollEvent
y <- GDK.getEventScrollY scrollEvent
handleAction elts vars ( Scroll ( Point2D x y ) ( Vector2D dx dy ) )
mousePos <- adjustMousePosition ( viewport elts ) eventOrigin ( Point2D x y )
handleAction elts vars ( Scroll mousePos ( Vector2D dx dy ) )
pure False
handleMouseButtonEvent :: UIElements -> Variables -> GDK.EventButton -> IO Bool
handleMouseButtonEvent elts vars mouseClickEvent = do
handleMouseButtonEvent :: UIElements -> Variables -> ActionOrigin -> GDK.EventButton -> IO Bool
handleMouseButtonEvent elts vars eventOrigin mouseClickEvent = do
button <- GDK.getEventButtonButton mouseClickEvent
x <- GDK.getEventButtonX mouseClickEvent
y <- GDK.getEventButtonY mouseClickEvent
handleAction elts vars ( MouseClick button ( Point2D x y ) )
mousePos <- adjustMousePosition ( viewport elts ) eventOrigin ( Point2D x y )
handleAction elts vars ( MouseClick eventOrigin button mousePos )
pure False
handleMouseButtonRelease :: UIElements -> Variables -> GDK.EventButton -> IO Bool
handleMouseButtonRelease elts vars mouseReleaseEvent = do
handleMouseButtonRelease :: UIElements -> Variables -> ActionOrigin -> GDK.EventButton -> IO Bool
handleMouseButtonRelease elts vars eventOrigin mouseReleaseEvent = do
button <- GDK.getEventButtonButton mouseReleaseEvent
x <- GDK.getEventButtonX mouseReleaseEvent
y <- GDK.getEventButtonY mouseReleaseEvent
handleAction elts vars ( MouseRelease button ( Point2D x y ) )
mousePos <- adjustMousePosition ( viewport elts ) eventOrigin ( Point2D x y )
handleAction elts vars ( MouseRelease button mousePos )
pure False
adjustMousePosition :: Viewport -> ActionOrigin -> Point2D Double -> IO ( Point2D Double )
adjustMousePosition _ ViewportOrigin pt = pure pt
adjustMousePosition ( Viewport { .. } ) ( RulerOrigin ruler ) ( Point2D x y ) =
case ruler of
RulerCorner -> do
dx <- fromIntegral @_ @Double <$> GTK.widgetGetAllocatedWidth rulerCornerDrawingArea
dy <- fromIntegral @_ @Double <$> GTK.widgetGetAllocatedHeight rulerCornerDrawingArea
pure ( Point2D ( x - dx ) ( y - dy ) )
LeftRuler -> do
dx <- fromIntegral @_ @Double <$> GTK.widgetGetAllocatedWidth leftRulerDrawingArea
pure ( Point2D ( x - dx ) y )
TopRuler -> do
dy <- fromIntegral @_ @Double <$> GTK.widgetGetAllocatedHeight topRulerDrawingArea
pure ( Point2D x ( y - dy ) )
--------------------------------------------------------------------------------
-- Keyboard events.

View file

@ -1,4 +1,5 @@
{-# LANGUAGE BlockArguments #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveTraversable #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DerivingVia #-}
@ -8,16 +9,17 @@
{-# LANGUAGE NegativeLiterals #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeApplications #-}
module MetaBrush.Render.Document
( renderDocument, blankRender )
( renderDocument, renderGuides, blankRender )
where
-- base
import Control.Monad
( guard, when, unless )
import Data.Foldable
( for_, sequenceA_ )
( for_, sequenceA_, toList )
import Data.Functor.Compose
( Compose(..) )
import Data.Int
@ -36,6 +38,8 @@ import Data.Act
)
-- containers
import qualified Data.Map as Map
( adjust )
import Data.Sequence
( Seq(..) )
import qualified Data.Sequence as Seq
@ -46,6 +50,8 @@ import Generic.Data
( Generically1(..) )
-- generic-lens
import Data.Generics.Product.Fields
( field' )
import Data.Generics.Product.Typed
( HasType )
@ -54,7 +60,7 @@ import qualified GI.Cairo.Render as Cairo
-- lens
import Control.Lens
( view )
( view, over )
-- MetaBrush
import qualified Math.Bezier.Cubic as Cubic
@ -65,13 +71,15 @@ import Math.Bezier.Stroke
( StrokePoint(..), stroke )
import Math.Vector2D
( Point2D(..), Vector2D(..) )
import MetaBrush.Action
( ActionOrigin(..) )
import MetaBrush.Asset.Colours
( Colours, ColourRecord(..) )
import MetaBrush.Context
( HoldAction(..), PartialPath(..) )
( HoldAction(..), GuideAction(..), PartialPath(..) )
import MetaBrush.Document
( Document(..)
, Stroke(..), FocusState(..)
, Stroke(..), Guide(..), FocusState(..)
, PointData(..), BrushPointData(..)
, _selection
)
@ -79,6 +87,8 @@ import MetaBrush.Document.Selection
( translateSelection )
import MetaBrush.UI.ToolBar
( Mode(..) )
import MetaBrush.UI.Viewport
( Ruler(..) )
import MetaBrush.Util
( withRGBA )
@ -105,7 +115,7 @@ toAll action = Compose ( pure action )
--------------------------------------------------------------------------------
blankRender :: Colours -> Cairo.Render ()
blankRender ( Colours { .. } ) = pure ()
blankRender ( Colours {..} ) = pure ()
renderDocument
:: Colours -> Mode -> ( Int32, Int32 )
@ -176,6 +186,73 @@ renderDocument
pure ()
renderGuides
:: Colours -> ( Int32, Int32 ) -> ActionOrigin -> ( Int32, Int32 )
-> Maybe ( Point2D Double ) -> Maybe HoldAction
-> Document
-> Cairo.Render ()
renderGuides
cols ( viewportWidth, viewportHeight ) actionOrigin ( width, height )
mbMousePos mbHoldEvent
( Document { viewportCenter = Point2D cx cy, zoomFactor, guides } ) = do
let
modifiedGuides :: [ Guide ]
modifiedGuides
| Just ( GuideAction { holdStartPos = mousePos0, guideAction = act } ) <- mbHoldEvent
, Just mousePos <- mbMousePos
= case act of
MoveGuide guideUnique
->
let
translate :: Point2D Double -> Point2D Double
translate = ( ( mousePos0 --> mousePos :: Vector2D Double ) )
in toList ( Map.adjust ( over ( field' @"guidePoint" ) translate ) guideUnique guides )
CreateGuide ruler
-> let
addNewGuides :: [ Guide ] -> [ Guide ]
addNewGuides gs = case ruler of
RulerCorner
-> Guide { guidePoint = mousePos, guideNormal = Vector2D 0 1, guideUnique = undefined }
: Guide { guidePoint = mousePos, guideNormal = Vector2D 1 0, guideUnique = undefined }
: gs
LeftRuler
-> Guide { guidePoint = mousePos, guideNormal = Vector2D 1 0, guideUnique = undefined }
: gs
TopRuler
-> Guide { guidePoint = mousePos, guideNormal = Vector2D 0 1, guideUnique = undefined }
: gs
in addNewGuides ( toList guides )
| otherwise
= toList guides
Cairo.save
Cairo.translate ( 0.5 * fromIntegral viewportWidth ) ( 0.5 * fromIntegral viewportHeight )
additionalAdjustment
Cairo.scale zoomFactor zoomFactor
Cairo.translate ( -cx ) ( -cy )
for_ modifiedGuides ( renderGuide cols zoomFactor )
Cairo.restore
pure ()
where
dx, dy :: Double
dx = fromIntegral width
dy = fromIntegral height
additionalAdjustment :: Cairo.Render ()
additionalAdjustment = case actionOrigin of
ViewportOrigin -> pure ()
RulerOrigin ruler -> case ruler of
RulerCorner -> do
Cairo.translate dx dy
LeftRuler -> do
Cairo.translate dx 0
TopRuler -> do
Cairo.translate 0 dy
renderStroke :: Colours -> Mode -> Double -> Stroke -> Compose Renders Cairo.Render ()
renderStroke cols@( Colours { brush } ) mode zoom ( Stroke { strokePoints = pts, strokeVisible } )
| strokeVisible
@ -276,8 +353,24 @@ renderBrushShape cols zoom pt =
*> Compose blank { renderPPts = drawCross cols zoom }
*> toAll Cairo.restore
renderGuide :: Colours -> Double -> Guide -> Cairo.Render ()
renderGuide ( Colours {..} ) zoom ( Guide { guidePoint = Point2D x y , guideNormal = Vector2D nx ny } ) = do
Cairo.save
Cairo.translate x y
Cairo.scale ( 1 / zoom ) ( 1 / zoom )
Cairo.setLineWidth 2.0
withRGBA guide Cairo.setSourceRGBA
Cairo.moveTo ( 1e5 * ny ) ( -1e5 * nx )
Cairo.lineTo ( -1e5 * ny ) ( 1e5 * nx )
Cairo.stroke
Cairo.restore
drawPoint :: HasType FocusState d => Colours -> Double -> StrokePoint d -> Cairo.Render ()
drawPoint ( Colours { .. } ) zoom pt@( PathPoint { coords = Point2D x y } )
drawPoint ( Colours {..} ) zoom pt@( PathPoint { coords = Point2D x y } )
= do
let
hsqrt3 :: Double
@ -311,7 +404,7 @@ drawPoint ( Colours { .. } ) zoom pt@( PathPoint { coords = Point2D x y } )
Cairo.restore
drawPoint ( Colours { .. } ) zoom pt@( ControlPoint { coords = Point2D x y } )
drawPoint ( Colours {..} ) zoom pt@( ControlPoint { coords = Point2D x y } )
= do
let
selectionState :: FocusState
@ -450,7 +543,7 @@ drawStroke ( Colours { brushStroke } ) strokeData = do
go' p0 ps = error $ "drawStroke: unrecognised stroke type\n" <> show ( p0 :<| ps )
drawSelectionRectangle :: Colours -> Double -> Point2D Double -> Point2D Double -> Cairo.Render ()
drawSelectionRectangle ( Colours { .. } ) zoom ( Point2D x0 y0 ) ( Point2D x1 y1 ) = do
drawSelectionRectangle ( Colours {..} ) zoom ( Point2D x0 y0 ) ( Point2D x1 y1 ) = do
Cairo.save
@ -470,7 +563,7 @@ drawSelectionRectangle ( Colours { .. } ) zoom ( Point2D x0 y0 ) ( Point2D x1 y1
Cairo.restore
drawCross :: Colours -> Double -> Cairo.Render ()
drawCross ( Colours { .. } ) zoom = do
drawCross ( Colours {..} ) zoom = do
Cairo.save
Cairo.setLineWidth 1.5

View file

@ -29,7 +29,7 @@ import qualified Math.Bezier.Quadratic as Quadratic
import Math.Bezier.Stroke
( StrokePoint(..) )
import Math.Module
( (*^), squaredNorm, closestPointToLine )
( (*^), squaredNorm, closestPointToSegment )
import Math.Vector2D
( Point2D(..), Vector2D(..) )
import MetaBrush.Document
@ -55,19 +55,19 @@ closestPoint c ( Stroke { strokePoints = pt0 :<| pts, strokeVisible = True } ) =
-- Line.
go ( PathPoint { coords = p0 } )
( sp1@( PathPoint { coords = p1 } ) :<| ps )
= res ( closestPointToLine @( Vector2D Double ) c p0 p1 )
= res ( closestPointToSegment @( Vector2D Double ) c p0 p1 )
<> go sp1 ps
-- Quadratic Bézier curve.
go ( PathPoint { coords = p0 } )
( ControlPoint { coords = p1 } :<| sp2@( PathPoint { coords = p2 } ) :<| ps )
= fmap ( fmap ( Just . snd ) )
( Quadratic.closestPoint @( Vector2D Double ) ( Quadratic.Bezier { .. } ) c )
( Quadratic.closestPoint @( Vector2D Double ) ( Quadratic.Bezier {..} ) c )
<> go sp2 ps
-- Cubic Bézier curve.
go ( PathPoint { coords = p0 } )
( PathPoint { coords = p1 } :<| PathPoint { coords = p2 } :<| sp3@( PathPoint { coords = p3 } ) :<| ps )
= fmap ( fmap ( Just . snd ) )
( Cubic.closestPoint @( Vector2D Double ) ( Cubic.Bezier { .. } ) c )
( Cubic.closestPoint @( Vector2D Double ) ( Cubic.Bezier {..} ) c )
<> go sp3 ps
go p0 ps = error $ "closestPoint: unrecognised stroke type\n" <> show ( p0 :<| ps )
closestPoint _ _ = Min $ Arg ( 1 / 0 ) Nothing

View file

@ -49,7 +49,9 @@ import MetaBrush.Context
import MetaBrush.Document
( Document(..), emptyDocument )
import {-# SOURCE #-} MetaBrush.UI.InfoBar
( InfoBar )
( InfoBar, updateInfoBar )
import MetaBrush.UI.Viewport
( Viewport(..) )
import MetaBrush.Unique
( Unique, freshUnique, uniqueText )
import MetaBrush.Util
@ -78,8 +80,8 @@ newFileTab
-> TabLocation
-> IO ()
newFileTab
uiElts@( UIElements { fileBar = FileBar {..}, .. } )
vars@( Variables { .. } )
uiElts@( UIElements { fileBar = FileBar {..}, viewport = Viewport {..}, .. } )
vars@( Variables {..} )
mbDoc
newTabLoc
= do
@ -157,6 +159,7 @@ newFileTab
STM.writeTVar activeDocumentTVar ( Just newUnique )
GTK.widgetQueueDraw viewportDrawingArea
updateInfoBar viewportDrawingArea infoBar vars
void $ GTK.onButtonClicked pgButton do
isActive <- GTK.toggleButtonGetActive pgButton
@ -181,12 +184,12 @@ newFileTab
-- Updates the active document when buttons are clicked.
createFileBar
:: Colours -> Variables
-> GTK.Window -> GTK.Box -> GTK.Label -> GTK.DrawingArea -> InfoBar
-> GTK.Window -> GTK.Box -> GTK.Label -> Viewport -> InfoBar
-> IO FileBar
createFileBar
colours
vars@( Variables { openDocumentsTVar } )
window titleBar title viewportDrawingArea infoBar
window titleBar title viewport infoBar
= do
-- Create file bar: box containing scrollable tabs, and a "+" button after it.
@ -212,9 +215,9 @@ createFileBar
let
fileBar :: FileBar
fileBar = FileBar { .. }
fileBar = FileBar {..}
uiElements :: UIElements
uiElements = UIElements { .. }
uiElements = UIElements {..}
documents <- STM.readTVarIO openDocumentsTVar
for_ documents \ doc ->
@ -233,7 +236,7 @@ createFileBar
-- | Close a document: remove the corresponding file tab from the file bar.
removeFileTab :: Variables -> Unique -> IO ()
removeFileTab ( Variables { .. } ) docUnique = do
removeFileTab ( Variables {..} ) docUnique = do
cleanupAction <- STM.atomically do
-- Remove the tab.

View file

@ -17,6 +17,8 @@ import MetaBrush.Document
( Document )
import {-# SOURCE #-} MetaBrush.UI.InfoBar
( InfoBar )
import MetaBrush.UI.Viewport
( Viewport )
import MetaBrush.Unique
( Unique )
@ -37,7 +39,7 @@ instance Show TabLocation
createFileBar
:: Colours -> Variables
-> GTK.Window -> GTK.Box -> GTK.Label -> GTK.DrawingArea -> InfoBar
-> GTK.Window -> GTK.Box -> GTK.Label -> Viewport -> InfoBar
-> IO FileBar
newFileTab

View file

@ -96,7 +96,7 @@ createInfoBar colours = do
-- Magnifier
magnifierArea <- GTK.drawingAreaNew
zoomText <- GTK.labelNew ( Just " 100.00%" )
zoomText <- GTK.labelNew ( Just na )
GTK.boxPackStart zoomBox magnifierArea True True 0
GTK.boxPackStart zoomBox zoomText True True 0
@ -111,7 +111,7 @@ createInfoBar colours = do
-- Cursor position
cursorPosArea <- GTK.drawingAreaNew
cursorPosText <- GTK.labelNew ( Just "x: 0.00\ny: 0.00" )
cursorPosText <- GTK.labelNew ( Just $ "x: " <> na <> "\ny: " <> na )
GTK.boxPackStart cursorPosBox cursorPosArea False False 0
GTK.boxPackStart cursorPosBox cursorPosText False False 0
@ -126,7 +126,7 @@ createInfoBar colours = do
-- Top left position
topLeftPosArea <- GTK.drawingAreaNew
topLeftPosText <- GTK.labelNew ( Just "x: 0.00\ny: 0.00" )
topLeftPosText <- GTK.labelNew ( Just $ "x: " <> na <> "\ny: " <> na )
GTK.boxPackStart topLeftPosBox topLeftPosArea False False 0
GTK.boxPackStart topLeftPosBox topLeftPosText False False 0
@ -139,7 +139,7 @@ createInfoBar colours = do
-- Bottom right position
botRightPosArea <- GTK.drawingAreaNew
botRightPosText <- GTK.labelNew ( Just "x: 0.000\ny: 0.00" )
botRightPosText <- GTK.labelNew ( Just $ "x: " <> na <> "\ny: " <> na )
GTK.boxPackStart botRightPosBox botRightPosArea False False 0
GTK.boxPackStart botRightPosBox botRightPosText False False 0
@ -159,17 +159,14 @@ createInfoBar colours = do
for_ [ zoomText, cursorPosText, topLeftPosText, botRightPosText ] \ info -> do
widgetAddClass info "infoBarInfo"
pure ( InfoBar { .. } )
pure ( InfoBar {..} )
updateInfoBar :: GTK.DrawingArea -> InfoBar -> Variables -> IO ()
updateInfoBar viewportDrawingArea ( InfoBar { .. } ) vars@( Variables { mousePosTVar } )
updateInfoBar viewportDrawingArea ( InfoBar {..} ) vars@( Variables { mousePosTVar } )
= do
viewportWidth <- fromIntegral @_ @Double <$> GTK.widgetGetAllocatedWidth viewportDrawingArea
viewportHeight <- fromIntegral @_ @Double <$> GTK.widgetGetAllocatedHeight viewportDrawingArea
mbDoc <- STM.atomically $ currentDocument vars
let
na :: IsString a => a
na = " n/a"
case mbDoc of
Nothing -> do
GTK.labelSetText zoomText $ na
@ -182,7 +179,7 @@ updateInfoBar viewportDrawingArea ( InfoBar { .. } ) vars@( Variables { mousePos
toViewport = toViewportCoordinates zoomFactor ( viewportWidth, viewportHeight ) viewportCenter
Point2D l t = toViewport ( Point2D 0 0 )
Point2D r b = toViewport ( Point2D viewportWidth viewportHeight )
mbMousePos <- fmap toViewport <$> STM.readTVarIO mousePosTVar
mbMousePos <- STM.readTVarIO mousePosTVar
GTK.labelSetText zoomText $ Text.pack ( fixed 5 2 ( 100 * zoomFactor ) <> "%" )
case mbMousePos of
Just ( Point2D mx my ) ->
@ -201,3 +198,6 @@ fixed digitsBefore digitsAfter x = case second tail . break ( == '.' ) $ showFFl
r = length bs
in
replicate ( digitsBefore - l ) ' ' <> as <> "." <> bs <> replicate ( digitsAfter - r ) '0'
na :: IsString a => a
na = " n/a"

View file

@ -233,7 +233,7 @@ newMenuItem
-> GTK.AccelGroup
-> MenuItem action submenu Description
-> m GTK.MenuItem
newMenuItem uiElts vars accelGroup ( MenuItemDescription { .. } ) = do
newMenuItem uiElts vars accelGroup ( MenuItemDescription {..} ) = do
menuItem <- GTK.menuItemNewWithLabel menuItemLabel
for_ menuItemAccel \ ( key, modifiers ) -> do
GTK.widgetAddAccelerator menuItem "activate" accelGroup key ( map modifierType modifiers ) [ GTK.AccelFlagsVisible ]
@ -279,7 +279,7 @@ instance ( HandleAction action, HasConstraints CreateMenuItem ( submenu Descript
, menuItemSubmenu = submenuItems
}
instance CreateMenuItem ( Separator Description ) ( Separator Object ) where
createMenuItem _ _ _ attachToParent ( SeparatorDescription { .. } ) = do
createMenuItem _ _ _ attachToParent ( SeparatorDescription {..} ) = do
separator <- GTK.separatorMenuItemNew
unless ( null separatorClasses ) do
widgetAddClasses separator separatorClasses

View file

@ -140,4 +140,4 @@ createToolBar toolTVar modeTVar colours drawingArea toolBar = do
$ Cairo.renderWithContext
( drawMeta colours )
pure ( ToolBar { .. } )
pure ( ToolBar {..} )

View file

@ -1,11 +1,19 @@
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE BlockArguments #-}
{-# LANGUAGE DerivingStrategies #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE TypeApplications #-}
module MetaBrush.UI.Viewport
( Viewport(..), createViewport )
( Viewport(..), createViewport
, Ruler(..)
)
where
-- base
import Data.Foldable
( for_ )
-- gi-gdk
import qualified GI.Gdk as GDK
@ -20,7 +28,11 @@ import MetaBrush.Util
data Viewport
= Viewport
{ viewportDrawingArea :: !GTK.DrawingArea
{ viewportDrawingArea
, rulerCornerDrawingArea
, leftRulerDrawingArea
, topRulerDrawingArea
:: !GTK.DrawingArea
}
createViewport :: GTK.Grid -> IO Viewport
@ -61,14 +73,14 @@ createViewport viewportGrid = do
GTK.revealerSetTransitionType rvLeftRuler GTK.RevealerTransitionTypeSlideLeft
GTK.revealerSetTransitionType rvTopRuler GTK.RevealerTransitionTypeSlideUp
rulerCornerArea <- GTK.drawingAreaNew
GTK.boxPackStart rulerCorner rulerCornerArea True True 0
rulerCornerDrawingArea <- GTK.drawingAreaNew
GTK.boxPackStart rulerCorner rulerCornerDrawingArea True True 0
leftRulerArea <- GTK.drawingAreaNew
GTK.boxPackStart leftRuler leftRulerArea True True 0
leftRulerDrawingArea <- GTK.drawingAreaNew
GTK.boxPackStart leftRuler leftRulerDrawingArea True True 0
topRulerArea <- GTK.drawingAreaNew
GTK.boxPackStart topRuler topRulerArea True True 0
topRulerDrawingArea <- GTK.drawingAreaNew
GTK.boxPackStart topRuler topRulerDrawingArea True True 0
GTK.widgetSetHexpand rulerCorner False
GTK.widgetSetVexpand rulerCorner False
@ -81,12 +93,15 @@ createViewport viewportGrid = do
viewportDrawingArea <- GTK.drawingAreaNew
GTK.setContainerChild viewportOverlay viewportDrawingArea
GTK.widgetAddEvents viewportDrawingArea
[ GDK.EventMaskPointerMotionMask
, GDK.EventMaskButtonPressMask, GDK.EventMaskButtonReleaseMask
, GDK.EventMaskScrollMask, GDK.EventMaskSmoothScrollMask
]
for_ [ rulerCornerDrawingArea, leftRulerDrawingArea, topRulerDrawingArea, viewportDrawingArea ] \ drawingArea -> do
GTK.widgetAddEvents drawingArea
[ GDK.EventMaskPointerMotionMask
, GDK.EventMaskButtonPressMask, GDK.EventMaskButtonReleaseMask
, GDK.EventMaskScrollMask, GDK.EventMaskSmoothScrollMask
]
{-
-----------------
-- Viewport scrolling
@ -105,4 +120,14 @@ createViewport viewportGrid = do
widgetAddClass viewportHScrollbar "viewportScrollbar"
widgetAddClass viewportVScrollbar "viewportScrollbar"
pure ( Viewport { .. } )
-}
pure ( Viewport {..} )
--------------------------------------------------------------------------------
data Ruler
= RulerCorner
| LeftRuler
| TopRuler
deriving stock Show

View file

@ -77,7 +77,7 @@ deriving via Ap Bezier p
-- | Cubic Bézier curve.
bezier :: forall v r p. ( Torsor v p, Module r v ) => Bezier p -> r -> p
bezier ( Bezier { .. } ) t =
bezier ( Bezier {..} ) t =
lerp @v t
( Quadratic.bezier @v ( Quadratic.Bezier p0 p1 p2 ) t )
( Quadratic.bezier @v ( Quadratic.Bezier p1 p2 p3 ) t )
@ -85,7 +85,7 @@ bezier ( Bezier { .. } ) t =
-- | Derivative of cubic Bézier curve.
bezier' :: forall v r p. ( Torsor v p, Module r v ) => Bezier p -> r -> v
bezier' ( Bezier { .. } ) t
bezier' ( Bezier {..} ) t
= ( 3 *^ )
$ lerp @v t
( lerp @v t ( p0 --> p1 ) ( p1 --> p2 ) )
@ -93,7 +93,7 @@ bezier' ( Bezier { .. } ) t
-- | Subdivide a cubic Bézier curve into two parts.
subdivide :: forall v r p. ( Torsor v p, Module r v ) => Bezier p -> r -> ( Bezier p, Bezier p )
subdivide ( Bezier { .. } ) t = ( Bezier p0 q1 q2 pt, Bezier pt r1 r2 p3 )
subdivide ( Bezier {..} ) t = ( Bezier p0 q1 q2 pt, Bezier pt r1 r2 p3 )
where
pt, s, q1, q2, r1, r2 :: p
q1 = lerp @v t p0 p1
@ -105,7 +105,7 @@ subdivide ( Bezier { .. } ) t = ( Bezier p0 q1 q2 pt, Bezier pt r1 r2 p3 )
-- | Polynomial coefficients of the derivative of the distance to a cubic Bézier curve.
ddist :: forall v r p. ( Torsor v p, Inner r v, RealFloat r ) => Bezier p -> p -> [ r ]
ddist ( Bezier { .. } ) c = [ a0, a1, a2, a3, a4, a5 ]
ddist ( Bezier {..} ) c = [ a0, a1, a2, a3, a4, a5 ]
where
v, v', v'', v''' :: v
v = c --> p0
@ -123,7 +123,7 @@ ddist ( Bezier { .. } ) c = [ a0, a1, a2, a3, a4, a5 ]
-- | Finds the closest point to a given point on a cubic Bézier curve.
closestPoint :: forall v r p. ( Torsor v p, Inner r v, RealFloat r ) => Bezier p -> p -> ArgMin r ( r, p )
closestPoint pts@( Bezier { .. } ) c = pickClosest ( 0 :| 1 : roots ) -- todo: also include the self-intersection point if one exists
closestPoint pts@( Bezier {..} ) c = pickClosest ( 0 :| 1 : roots ) -- todo: also include the self-intersection point if one exists
where
roots :: [ r ]
roots = filter ( \ r -> r > 0 && r < 1 ) ( realRoots $ ddist @v pts c )

View file

@ -75,15 +75,15 @@ deriving via Ap Bezier p
-- | Quadratic Bézier curve.
bezier :: forall v r p. ( Torsor v p, Module r v ) => Bezier p -> r -> p
bezier ( Bezier { .. } ) t = lerp @v t ( lerp @v t p0 p1 ) ( lerp @v t p1 p2 )
bezier ( Bezier {..} ) t = lerp @v t ( lerp @v t p0 p1 ) ( lerp @v t p1 p2 )
-- | Derivative of quadratic Bézier curve.
bezier' :: forall v r p. ( Torsor v p, Module r v ) => Bezier p -> r -> v
bezier' ( Bezier { .. } ) t = 2 *^ lerp @v t ( p0 --> p1 ) ( p1 --> p2 )
bezier' ( Bezier {..} ) t = 2 *^ lerp @v t ( p0 --> p1 ) ( p1 --> p2 )
-- | Subdivide a quadratic Bézier curve into two parts.
subdivide :: forall v r p. ( Torsor v p, Module r v ) => Bezier p -> r -> ( Bezier p, Bezier p )
subdivide ( Bezier { .. } ) t = ( Bezier p0 q1 pt, Bezier pt r1 p2 )
subdivide ( Bezier {..} ) t = ( Bezier p0 q1 pt, Bezier pt r1 p2 )
where
pt, q1, r1 :: p
q1 = lerp @v t p0 p1
@ -92,7 +92,7 @@ subdivide ( Bezier { .. } ) t = ( Bezier p0 q1 pt, Bezier pt r1 p2 )
-- | Polynomial coefficients of the derivative of the distance to a quadratic Bézier curve.
ddist :: forall v r p. ( Torsor v p, Inner r v, RealFloat r ) => Bezier p -> p -> [ r ]
ddist ( Bezier { .. } ) c = [ a0, a1, a2, a3 ]
ddist ( Bezier {..} ) c = [ a0, a1, a2, a3 ]
where
v, v', v'' :: v
v = c --> p0
@ -107,7 +107,7 @@ ddist ( Bezier { .. } ) c = [ a0, a1, a2, a3 ]
-- | Finds the closest point to a given point on a quadratic Bézier curve.
closestPoint :: forall v r p. ( Torsor v p, Inner r v, RealFloat r ) => Bezier p -> p -> ArgMin r ( r, p )
closestPoint pts@( Bezier { .. } ) c = pickClosest ( 0 :| 1 : roots )
closestPoint pts@( Bezier {..} ) c = pickClosest ( 0 :| 1 : roots )
where
roots :: [ r ]
roots = filter ( \ r -> r > 0 && r < 1 ) ( realRoots $ ddist @v pts c )

View file

@ -227,7 +227,7 @@ stroke allPts@( spt0 :<| spt1 :<| spts )
tgt2 :: Vector2D Double
tgt2 = p1 --> p2
bez :: Quadratic.Bezier ( Point2D Double )
bez = Quadratic.Bezier { .. }
bez = Quadratic.Bezier {..}
brush :: Double -> Seq ( StrokePoint () )
brush t = quadraticBezierBrush t
( Quadratic.Bezier ( brushShape @x sp0 ) ( brushShape @x sp1 ) ( brushShape @x sp2 ) )
@ -261,7 +261,7 @@ stroke allPts@( spt0 :<| spt1 :<| spts )
tgt3 :: Vector2D Double
tgt3 = p2 --> p3
bez :: Cubic.Bezier ( Point2D Double )
bez = Cubic.Bezier { .. }
bez = Cubic.Bezier {..}
brush :: Double -> Seq ( StrokePoint () )
brush t = cubicBezierBrush t
( Cubic.Bezier ( brushShape @x sp0 ) ( brushShape @x sp1 ) ( brushShape @x sp2 ) ( brushShape @x sp3 ) )
@ -313,11 +313,11 @@ quadraticBezierBrush t ( Quadratic.Bezier p0s p1s p2s ) = Seq.zipWith3 f p0s p1s
f ( PathPoint { coords = p0 } )
( PathPoint { coords = p1 } )
( PathPoint { coords = p2 } )
= PP $ Quadratic.bezier @( Vector2D Double ) ( Quadratic.Bezier { .. } ) t
= PP $ Quadratic.bezier @( Vector2D Double ) ( Quadratic.Bezier {..} ) t
f ( ControlPoint { coords = p0 } )
( ControlPoint { coords = p1 } )
( ControlPoint { coords = p2 } )
= CP $ Quadratic.bezier @( Vector2D Double ) ( Quadratic.Bezier { .. } ) t
= CP $ Quadratic.bezier @( Vector2D Double ) ( Quadratic.Bezier {..} ) t
f p1 p2 p3 = error $ "stroke: incompatible brushes " <> show [ p1, p2, p3 ]
cubicBezierBrush :: forall d. Show d => Double -> Cubic.Bezier ( Seq ( StrokePoint d ) ) -> Seq ( StrokePoint () )
@ -328,12 +328,12 @@ cubicBezierBrush t ( Cubic.Bezier p0s p1s p2s p3s ) = Seq.zipWith4 f p0s p1s p2s
( PathPoint { coords = p1 } )
( PathPoint { coords = p2 } )
( PathPoint { coords = p3 } )
= PP $ Cubic.bezier @( Vector2D Double ) ( Cubic.Bezier { .. } ) t
= PP $ Cubic.bezier @( Vector2D Double ) ( Cubic.Bezier {..} ) t
f ( ControlPoint { coords = p0 } )
( ControlPoint { coords = p1 } )
( ControlPoint { coords = p2 } )
( ControlPoint { coords = p3 } )
= CP $ Cubic.bezier @( Vector2D Double ) ( Cubic.Bezier { .. } ) t
= CP $ Cubic.bezier @( Vector2D Double ) ( Cubic.Bezier {..} ) t
f p1 p2 p3 p4 = error $ "stroke: incompatible brushes " <> show [ p1, p2, p3, p4 ]
fitCurve
@ -407,7 +407,7 @@ splitFirstPiece t ( sp0 :<| sp1 :<| sp2 :<| _ )
, let
q1, p, r1 :: Point2D Double
( Quadratic.Bezier _ q1 p, Quadratic.Bezier _ r1 _ )
= Quadratic.subdivide @( Vector2D Double ) ( Quadratic.Bezier { .. } ) t
= Quadratic.subdivide @( Vector2D Double ) ( Quadratic.Bezier {..} ) t
= ( PP p0 :<| CP q1 :<| PP p :<| Empty
, PP p :<| CP r1 :<| PP p2 :<| Empty
)
@ -420,7 +420,7 @@ splitFirstPiece t ( sp0 :<| sp1 :<| sp2 :<| sp3 :<| _ )
, let
q1, q2, p, r1, r2 :: Point2D Double
( Cubic.Bezier _ q1 q2 p, Cubic.Bezier _ r1 r2 _ )
= Cubic.subdivide @( Vector2D Double ) ( Cubic.Bezier { .. } ) t
= Cubic.subdivide @( Vector2D Double ) ( Cubic.Bezier {..} ) t
= ( PP p0 :<| CP q1 :<| CP q2 :<| PP p :<| Empty
, PP p :<| CP r1 :<| CP r2 :<| PP p3 :<| Empty
)
@ -463,7 +463,7 @@ withTangent tgt ( spt0 :<| spt1 :<| spts ) =
tgt1 :: Vector2D Double
tgt1 = p1 --> p2
in case between tgt tgt0 tgt1 of
Just t -> Offset i ( Just t ) ( MkVector2D $ Quadratic.bezier @( Vector2D Double ) ( Quadratic.Bezier { .. } ) t )
Just t -> Offset i ( Just t ) ( MkVector2D $ Quadratic.bezier @( Vector2D Double ) ( Quadratic.Bezier {..} ) t )
Nothing -> continue ( i + 2 ) tgt1 sp2 ps
-- Cubic Bézier curve.
go i tgt0
@ -475,7 +475,7 @@ withTangent tgt ( spt0 :<| spt1 :<| spts ) =
tgt1 = p1 --> p2
tgt2 = p2 --> p3
bez :: Cubic.Bezier ( Point2D Double )
bez = Cubic.Bezier { .. }
bez = Cubic.Bezier {..}
c01, c12, c23 :: Double
c01 = tgt `cross` tgt0
c12 = tgt `cross` tgt1

View file

@ -10,7 +10,7 @@ module Math.Module
( Module(..), lerp
, Inner(..)
, squaredNorm, quadrance, distance
, proj, projC, closestPointToLine
, proj, projC, closestPointToSegment
)
where
@ -79,11 +79,11 @@ proj x y = projC x y *^ y
projC :: forall m r. ( Inner r m, Fractional r ) => m -> m -> r
projC x y = x ^.^ y / squaredNorm y
closestPointToLine
closestPointToSegment
:: forall v r p
. ( Inner r v, Torsor v p, Fractional r, Ord r )
=> p -> p -> p -> p
closestPointToLine c p0 p1
closestPointToSegment c p0 p1
| t <= 0
= p0
| t >= 1