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@ue-too/board / DummyCanvas

Class: DummyCanvas ​

Defined in: packages/board/src/input-interpretation/input-state-machine/kmt-input-context.ts:98

No-op implementation of Canvas interface for web worker relay contexts.

Remarks ​

This class is used when an input state machine is configured to relay events to a web worker rather than perform actual canvas operations. The state machine requires a Canvas in its context, but in the relay scenario, no actual canvas operations are needed - events are simply forwarded to the worker thread.

All properties return default/empty values and all methods are no-ops.

See ​

DummyKmtInputContext

Implements ​

Constructors ​

Constructor ​

new DummyCanvas(): DummyCanvas

Returns ​

DummyCanvas

Properties ​

detached ​

detached: boolean = false

Defined in: packages/board/src/input-interpretation/input-state-machine/kmt-input-context.ts:108

Whether the canvas is currently detached from the DOM

Implementation of ​

Canvas.detached

dimensions ​

dimensions: object

Defined in: packages/board/src/input-interpretation/input-state-machine/kmt-input-context.ts:103

Combined dimensions and position information

height ​

height: number

position ​

position: Point

width ​

width: number

Implementation of ​

Canvas.dimensions

height ​

height: number = 0

Defined in: packages/board/src/input-interpretation/input-state-machine/kmt-input-context.ts:100

The canvas height in CSS pixels

Implementation of ​

Canvas.height

position ​

position: Point

Defined in: packages/board/src/input-interpretation/input-state-machine/kmt-input-context.ts:101

The top-left position of the canvas in window coordinates

Implementation of ​

Canvas.position

setCursor() ​

setCursor: (style) => void = NO_OP

Defined in: packages/board/src/input-interpretation/input-state-machine/kmt-input-context.ts:102

Sets the CSS cursor style for visual feedback

Parameters ​

style ​

CursorStyle

Returns ​

void

Implementation of ​

Canvas.setCursor

tearDown() ​

tearDown: () => void = NO_OP

Defined in: packages/board/src/input-interpretation/input-state-machine/kmt-input-context.ts:109

Cleanup method to dispose of resources and event listeners

Returns ​

void

Implementation of ​

Canvas.tearDown

width ​

width: number = 0

Defined in: packages/board/src/input-interpretation/input-state-machine/kmt-input-context.ts:99

The canvas width in CSS pixels

Implementation of ​

Canvas.width