# Class: BasicPlatform

# Hierarchy

# Constructors

# constructor

new BasicPlatform()

# Inherited from

BasePlatform.constructor

# Methods

# acquireContext

acquireContext(canvas, options?): CanvasRenderingContext2D

Called at chart construction time, returns a context2d instance implementing the [W3C Canvas 2D Context API standard]https://www.w3.org/TR/2dcontext/ (opens new window).

# Parameters

Name Type Description
canvas HTMLCanvasElement The canvas from which to acquire context (platform specific)
options? CanvasRenderingContext2DSettings The chart options

# Returns

CanvasRenderingContext2D

# Inherited from

BasePlatform.acquireContext

# Defined in

types/index.d.ts:2147


# addEventListener

addEventListener(chart, type, listener): void

Registers the specified listener on the given chart.

# Parameters

Name Type Description
chart Chart<keyof ChartTypeRegistry, (number | [number, number] | Point | BubbleDataPoint)[], unknown> Chart from which to listen for event
type string The (ChartEvent) type to listen for
listener (e: ChartEvent) => void Receives a notification (an object that implements the ChartEvent interface) when an event of the specified type occurs.

# Returns

void

# Inherited from

BasePlatform.addEventListener

# Defined in

types/index.d.ts:2165


# getDevicePixelRatio

getDevicePixelRatio(): number

# Returns

number

the current devicePixelRatio of the device this platform is connected to.

# Inherited from

BasePlatform.getDevicePixelRatio

# Defined in

types/index.d.ts:2176


# getMaximumSize

getMaximumSize(canvas, width?, height?, aspectRatio?): Object

# Parameters

Name Type Description
canvas HTMLCanvasElement The canvas for which to calculate the maximum size
width? number Parent element's content width
height? number Parent element's content height
aspectRatio? number The aspect ratio to maintain

# Returns

Object

the maximum size available.

Name Type
height number
width number

# Inherited from

BasePlatform.getMaximumSize

# Defined in

types/index.d.ts:2184


# isAttached

isAttached(canvas): boolean

# Parameters

Name Type
canvas HTMLCanvasElement

# Returns

boolean

true if the canvas is attached to the platform, false if not.

# Inherited from

BasePlatform.isAttached

# Defined in

types/index.d.ts:2189


# releaseContext

releaseContext(context): boolean

Called at chart destruction time, releases any resources associated to the context previously returned by the acquireContext() method.

# Parameters

Name Type Description
context CanvasRenderingContext2D The context2d instance

# Returns

boolean

true if the method succeeded, else false

# Inherited from

BasePlatform.releaseContext

# Defined in

types/index.d.ts:2157


# removeEventListener

removeEventListener(chart, type, listener): void

Removes the specified listener previously registered with addEventListener.

# Parameters

Name Type Description
chart Chart<keyof ChartTypeRegistry, (number | [number, number] | Point | BubbleDataPoint)[], unknown> Chart from which to remove the listener
type string The (ChartEvent) type to remove
listener (e: ChartEvent) => void The listener function to remove from the event target.

# Returns

void

# Inherited from

BasePlatform.removeEventListener

# Defined in

types/index.d.ts:2172


# updateConfig

updateConfig(config): void

Updates config with platform specific requirements

# Parameters

Name Type
config ChartConfiguration<keyof ChartTypeRegistry, (number | [number, number] | Point | BubbleDataPoint)[], unknown> | ChartConfigurationCustomTypesPerDataset<keyof ChartTypeRegistry, (number | [number, number] | Point | BubbleDataPoint)[], unknown>

# Returns

void

# Inherited from

BasePlatform.updateConfig

# Defined in

types/index.d.ts:2194