# Class: BasePlatform
# Hierarchy
BasePlatform
# Constructors
# constructor
• new BasePlatform()
# 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
# Defined in
types/index.d.ts:2157 (opens new window)
# 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
# Defined in
types/index.d.ts:2175 (opens new window)
# getDevicePixelRatio
▸ getDevicePixelRatio(): number
# Returns
number
the current devicePixelRatio of the device this platform is connected to.
# Defined in
types/index.d.ts:2186 (opens new window)
# 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 |
# Defined in
types/index.d.ts:2194 (opens new window)
# isAttached
▸ isAttached(canvas): boolean
# Parameters
| Name | Type |
|---|---|
canvas | HTMLCanvasElement |
# Returns
boolean
true if the canvas is attached to the platform, false if not.
# Defined in
types/index.d.ts:2199 (opens new window)
# 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
# Defined in
types/index.d.ts:2167 (opens new window)
# 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
# Defined in
types/index.d.ts:2182 (opens new window)
# 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