Class: MapSharedCachedCanvasSubLayer<P>

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:209

A sublayer of MapSharedCachedCanvasLayer.

Extends

• DisplayComponent<P>

Type Parameters

Type Parameter
P extends MapSharedCachedCanvasSubLayerProps<any>

Constructors

Constructor

new MapSharedCachedCanvasSubLayer<P>(props): MapSharedCachedCanvasSubLayer<P>

Defined in: src/sdk/components/FSComponent.ts:73

Creates an instance of a DisplayComponent.

Parameters

Parameter	Type	Description
props	P	The propertis of the component.

Returns

MapSharedCachedCanvasSubLayer<P>

Inherited from

DisplayComponent.constructor

Properties

context?

optional context: [] = undefined

Defined in: src/sdk/components/FSComponent.ts:64

The context on this component, if any.

Inherited from

DisplayComponent.context

---

contextType?

readonly optional contextType: readonly [] = undefined

Defined in: src/sdk/components/FSComponent.ts:67

The type of context for this component, if any.

Inherited from

DisplayComponent.contextType

---

props

props: P & ComponentProps

Defined in: src/sdk/components/FSComponent.ts:61

The properties of the component.

Inherited from

DisplayComponent.props

Accessors

buffer

Get Signature

get protected buffer(): MapSharedCachedCanvasInstance

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:248

This sublayer's shared offscreen buffer canvas instance.

Throws

Error if the buffer does not exist.

Returns

MapSharedCachedCanvasInstance

---

display

Get Signature

get protected display(): MapSharedCachedCanvasInstance

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:235

This sublayer's shared displayed canvas instance.

Throws

Error if this sublayer is not attached.

Returns

MapSharedCachedCanvasInstance

---

projection

Get Signature

get protected projection(): MapProjection

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:222

This sublayer's map projection.

Throws

Error if this sublayer is not attached.

Returns

MapProjection

Methods

attach()

attach(projection, display, buffer): void

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:286

Attaches this sublayer to a parent layer.

Parameters

Parameter	Type	Description
projection	MapProjection	The map projection used by this sublayer.
display	MapSharedCachedCanvasInstance	The displayed canvas instance shared by this sublayer.
buffer	undefined | MapSharedCachedCanvasInstance	The offscreen buffer canvas instance shared by this sublayer, or undefined if there is no buffer.

Returns

void

---

destroy()

destroy(): void

Defined in: src/sdk/components/FSComponent.ts:98

Destroys this component.

Returns

void

Inherited from

DisplayComponent.destroy

---

getContext()

protected getContext(context): never

Defined in: src/sdk/components/FSComponent.ts:106

Gets a context data subscription from the context collection.

Parameters

Parameter	Type	Description
context	never	The context to get the subscription for.

Returns

never

The requested context.

Throws

An error if no data for the specified context type could be found.

Inherited from

DisplayComponent.getContext

---

isAttached()

protected isAttached(): boolean

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:268

Checks whether this sublayer is attached to a parent layer.

Returns

boolean

Whether this sublayer is attached to a parent layer.

---

isVisible()

protected isVisible(): boolean

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:276

Checks whether this sublayer is visible.

Returns

boolean

Whether this sublayer is visible.

---

onAfterRender()

onAfterRender(node): void

Defined in: src/sdk/components/FSComponent.ts:87

A callback that is called after the component is rendered.

Parameters

Parameter	Type	Description
node	VNode	The component's VNode.

Returns

void

Inherited from

DisplayComponent.onAfterRender

---

onAttached()

onAttached(): void

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:325

This method is called when this sublayer is attached to its parent layer.

Returns

void

---

onBeforeRender()

onBeforeRender(): void

Defined in: src/sdk/components/FSComponent.ts:80

A callback that is called before the component is rendered.

Returns

void

Inherited from

DisplayComponent.onBeforeRender

---

onMapProjectionChanged()

onMapProjectionChanged(projection, changeFlags): void

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:349

This method is called when this sublayer's map projection changes.

Parameters

Parameter	Type	Description
projection	MapProjection	This sublayer's map projection.
changeFlags	number	The types of changes made to the projection.

Returns

void

---

onSleep()

onSleep(): void

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:339

This method is called when this sublayer's parent layer is put to sleep.

Returns

void

---

onUpdated()

onUpdated(time, elapsed): void

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:385

This method is called once every update cycle after this sublayer's shared canvas instance has had a chance to be invalidated.

Parameters

Parameter	Type	Description
time	number	The current time as a Javascript timestamp.
elapsed	number	The elapsed time, in milliseconds, since the last update.

Returns

void

---

onVisibilityChanged()

protected onVisibilityChanged(isVisible): void

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:318

This method is called when this layer's visibility changes.

Parameters

Parameter	Type	Description
isVisible	boolean	Whether the layer is now visible.

Returns

void

---

onWake()

onWake(): void

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:332

This method is called when this sublayer's parent layer is awakened.

Returns

void

---

render()

render(): null | VNode

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:390

Renders the component.

Returns

null | VNode

A JSX element to be rendered.

Overrides

DisplayComponent.render

---

setVisible()

setVisible(val): void

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:302

Sets this sublayer's visibility.

Parameters

Parameter	Type	Description
val	boolean	Whether this sublayer should be visible.

Returns

void

---

shouldInvalidateBuffer()

shouldInvalidateBuffer(time, elapsed): boolean

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:374

This method is called at the beginning of every update cycle to check whether this sublayer's shared offscreen buffer canvas instance should be invalidated. If the canvas is already invalidated, then this method will not be called.

Parameters

Parameter	Type	Description
time	number	The current time as a Javascript timestamp.
elapsed	number	The elapsed time, in milliseconds, since the last update.

Returns

boolean

Whether this sublayer's shared offscreen buffer canvas instance should be invalidated.

---

shouldInvalidateDisplay()

shouldInvalidateDisplay(time, elapsed): boolean

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:361

This method is called at the beginning of every update cycle to check whether this sublayer's shared displayed canvas instance should be invalidated. If the canvas is already invalidated, then this method will not be called.

Parameters

Parameter	Type	Description
time	number	The current time as a Javascript timestamp.
elapsed	number	The elapsed time, in milliseconds, since the last update.

Returns

boolean

Whether this sublayer's shared displayed canvas instance should be invalidated.

---

tryGetBuffer()

protected tryGetBuffer(): undefined | MapSharedCachedCanvasInstance

Defined in: src/sdk/components/map/layers/MapSharedCachedCanvasLayer.tsx:260

Attempts to get this sublayer's shared offscreen buffer canvas instance.

Returns

undefined | MapSharedCachedCanvasInstance

This sublayer's shared offscreen buffer canvas instance, or undefined if the buffer does not exist.