Module services 

Selection, undo history, snapping, handles and draw ordering for drawings.

DrawingManager coordinates these operations for a chart. Use the individual services when implementing your own drawing interaction or renderer.

Structs

DrawingInteraction

Self-contained interaction handler for chart drawings.

HandleConfig

Configuration for selection handle appearance and hit testing.

HandleService

Stateless service for selection handle operations on drawings.

HistoryService

History service for undo/redo operations

SelectionService

Selection service for managing drawing selection state

SnapOptions

Options for snap behavior

SnapService

Snap service for applying snap behavior to points

SnapTargets

Snap targets - prices and times to snap to

ZOrderService

Service for managing drawing z-order (render layering)

Functions

point_to_line_distance

Calculates the perpendicular distance from point to the closest point on the line segment [line_start, line_end].