Class WheelHandler

Mouse wheel/scroll event handler module. Handles wheel events for zooming and panning.

Index

Constructors

Properties

Methods

handle hook unhook

Constructors

constructor

new WheelHandler(ctx: EventContext): WheelHandler
Parameters
- ctx: EventContext
Returns WheelHandler

Properties

hooked

hooked: boolean = false

Flag indicating if scroll listeners are attached.

Methods

handle

handle(e: Event | WheelEvent, force?: boolean, offX?: number): void
Handles mouse wheel events for zooming.
Parameters
- e: Event | WheelEvent
  The WheelEvent.
- force: boolean = false
  Force handling even if conditions normally prevent it.
- offX: number = 0
  Optional X offset for zoom focus.
Returns void

hook

hook(): void
Hooks mouse wheel/scroll event listeners.

Returns void

unhook

unhook(): void
Unhooks mouse wheel/scroll event listeners.

Returns void