Hylograph.Brush.FFI

attachBrush_ :: Element -> BrushExtent -> (Nullable BrushSelection2D -> Effect Unit) -> (Nullable BrushSelection2D -> Effect Unit) -> (Nullable BrushSelection2D -> Effect Unit) -> Effect BrushHandle

Attach a 2D brush to an element

Parameters:

• element: DOM element (typically a <g>) to attach brush to
• extent: Brushable area bounds
• onStart: Handler called when brush gesture starts (receives selection or null)
• onBrush: Handler called during brush gesture (receives selection or null)
• onEnd: Handler called when brush gesture ends (receives selection or null)

Returns a BrushHandle for programmatic control.

attachBrushX_ :: Element -> BrushExtent -> (Nullable BrushSelectionX -> Effect Unit) -> (Nullable BrushSelectionX -> Effect Unit) -> (Nullable BrushSelectionX -> Effect Unit) -> Effect BrushHandle

Attach a 1D horizontal brush (brushX)

attachBrushY_ :: Element -> BrushExtent -> (Nullable BrushSelectionY -> Effect Unit) -> (Nullable BrushSelectionY -> Effect Unit) -> (Nullable BrushSelectionY -> Effect Unit) -> Effect BrushHandle

Attach a 1D vertical brush (brushY)

clearBrush_ :: BrushHandle -> Effect Unit

Clear the brush selection

moveBrush_ :: forall selection. BrushHandle -> Nullable selection -> Effect Unit

Move the brush selection programmatically Pass null to clear

getBrushSelection_ :: forall selection. BrushHandle -> Effect (Nullable selection)

Get current brush selection

data BrushHandle

Opaque handle for controlling a brush programmatically

type BrushExtent = { x0 :: Number, x1 :: Number, y0 :: Number, y1 :: Number }

Extent for brush (defines the brushable area)

type BrushSelection2D = { x0 :: Number, x1 :: Number, y0 :: Number, y1 :: Number }

2D brush selection (for brush())

type BrushSelectionX = { x0 :: Number, x1 :: Number }

1D horizontal brush selection (for brushX())

type BrushSelectionY = { y0 :: Number, y1 :: Number }

1D vertical brush selection (for brushY())