newRadarWidget

newRadarWidget is a constructor function for creating the Radar widget.

Widget Constructor

Call newRadarWidget to create a widget instance inside a browser DOM element.

import { newRadarWidget } from '@dxfeed-widgets/radar'

const domNode = document.getElementById('widget-container')
const dataProviders = {
    ipfPath: '/your-path/ipf',
    ipfAuthHeader: 'your-header',
    scannerPath: '/api/scanner',
    scannerAuthHeader: 'your-header',
    schedulePath: '/api/schedule'
}
const widget = newRadarWidget({
  element: domNode,
  providers: dataProviders,
})

Signature

newRadarWidget(props: WidgetConstructorProps): WidgetAPI

Returns

An WidgetAPI object.

WidgetConstructorProps

Name	Type	Description
element	HTMLElement	A DOM element where the widget should be attached.
providers	Providers	An object with configuration for data providers. Refer to the Data Providers section for details
config optional	Config	Initial configuration of the widget
state optional	State	Initial state of the widget
theme optional	ThemeName | Theme	Initial theme of the widget. Refer to the Styling section for details

Widget API

getConfig

Gets the current widget config.

Signature

getConfig(): Config

Returns

Config

---

setConfig

Sets widget config.

Signature

setConfig(config: Config): void

Parameters

Name	Type	Description
config	Config	Configuration object. Omitted or undefined properties will be set to default

---

getState

Gets the current widget state.

Signature

getState(): State

Returns

State

---

updateState

Updates widget state.

Signature

updateState(state: Partial<State>): void

Parameters

Name	Type	Description
state	Partial<State>	State object. Merges with the previous state object.

---

addStateListener

Sets up a function that will be called whenever the state or specified field is changed.

Signature

addStateListener(stateChangeCallback: (state: State) => void): void
addStateListener(field: keyof State, fieldChangeCallback: (field: State[keyof State]) => void): void

Parameters

Name	Type	Description
stateChangeCallback	(state: State) => void	Function that will be called whenever the state is changed.

Or

Name	Type	Description
field	keyof State	The state field to listen for.
fieldChangeCallback	(value: State[keyof State]) => void	Function that will be called whenever the specified field is changed.

---

removeStateListener

Removes an state listener previously registered with addStateListener

Signature

removeStateListener(stateChangeCallback: (state: State) => void): void
removeStateListener(field: keyof State, fieldChangeCallback: (field: State[keyof State]) => void): void

Parameters

Name	Type	Description
stateChangeCallback	(state: State) => void	Listener that will be removed.

Or

Name	Type	Description
field	keyof State	The state field for which to remove a listener.
fieldChangeCallback	(value: State[keyof State]) => void	Listener that will be removed.

---

getData

Gets the current widget data.

Signature

getData(): Data

Returns

Data

---

addDataListener

Sets up a function that will be called whenever the data or specified field is changed.

Signature

addDataListener(dataChangeCallback: (data: Data) => void): void
addDataListener(field: keyof Data, fieldChangeCallback: (field: Data[keyof Data]) => void): void

Parameters

Name	Type	Description
dataChangeCallback	(data: Data) => void	Function that will be called whenever the data is changed.

Or

Name	Type	Description
field	keyof Data	The data field to listen for.
fieldChangeCallback	(value: Data[keyof Data]) => void	Function that will be called whenever the specified field is changed.

---

removeDataListener

Removes an data listener previously registered with addDataListener

Signature

removeDataListener(dataChangeCallback: (data: Data) => void): void
removeDataListener(field: keyof Data, fieldChangeCallback: (field: Data[keyof Data]) => void): void

Parameters

Name	Type	Description
dataChangeCallback	(data: Data) => void	Listener that will be removed.

Or

Name	Type	Description
field	keyof Data	The data field for which to remove a listener.
fieldChangeCallback	(value: Data[keyof Data]) => void	Listener that will be removed.

---

setSlot

Inserts custom markup into widget UI. Refer to the Extend widget UI section for details.

Signature

setSlot(slot: Slot, element: HTMLElement): void

Parameters

Name	Type	Description
slot	Slot	The place where a provided element is inserted.
element	HTMLElement	An element that is inserted.

---

setTheme

Sets widget theme.

Signature

setTheme(theme: Theme | ThemeName): void

---

unmount

Destroys the widget.

Signature

unmount(): void

Data Providers

The Data Providers object supplies an information about the endpoints required by the widget, such as the path to the endpoint and the authorization key.

interface RadarWidgetDataProviders {
  ipfPath: string
  ipfAuthHeader: string
  scannerPath: string
  scannerAuthHeader: string
  schedulePath: string
}

Properties

Name	Type	Description
ipfPath	string	A string containing the path to the endpoint.
ipfAuthHeader	string	A string containing the authentication header for the endpoint.
scannerPath	string	A string containing the path to the endpoint.
scannerAuthHeader	string	A string containing the authentication header for the endpoint.
schedulePath	string	A string containing the path to the endpoint.

Configuration

Configuration is an object that defines the basic behavior of a widget and allows enabling or disabling widget features that cannot be configured within the widget's user interface.

Type

interface RadarWidgetConfig {
  columnSelectMenuEnabled?: boolean,
  resizable?: boolean,
  reorderable?: boolean,
  dataExportEnabled?: boolean,
  radarMenuEnabled?: boolean,
  refreshButtonEnabled?: boolean,
  candlePeriodSelectorViewMode?: ToolbarSelectorViewMode,
  delayNotificationEnabled?: boolean,
  symbolScheduleStatusEnabled?: boolean,
  locale?: LocaleSettings,
}

Properties

Name	Type	Default	Description
columnSelectMenuEnabled Optional	boolean	true	A flag that controls the column select menu feature visibility.
resizable Optional	boolean	true	A flag that controls the column resizable feature.
reorderable Optional	boolean	true	A flag that controls the column reorder feature.
dataExportEnabled Optional	boolean	true	A flag that controls a visibility of an export button.
radarMenuEnabled Optional	boolean	true	A flag that controls the radar menu button visibility in the toolbar.
refreshButtonEnabled Optional	boolean	true	A flag that controls the refresh button visibility in the toolbar.
candlePeriodSelectorViewMode Optional	ToolbarSelectorViewMode	'available'	view mode of the order select in the toolbar.
delayNotificationEnabled Optional	boolean	false	A flag that controls a visibility of an data delay notification.
symbolScheduleStatusEnabled Optional	boolean	false	A flag that controls a visibility of symbol schedule status in symbol column in table
locale Optional	LocaleSettings	{ language: 'en', dateLocale: 'en-GB' }	An object that defines the language and regional settings of the widget.

State

State is an object that represents the state of the widget.

Type

interface RadarWidgetState {
  columns: string[],
  columnSizes: Record<string, number>,
  filters: RadarFilters,
  sort: RadarSort,
  candlePeriod: CandlePeriod,
  selectedSymbol?: string,
}

Properties

Name	Type	Default	Description
columns	string[]	[ symbol, symbolDescription, marketCap, lastPrice, changePercent, change, volume, priceEarningsRatio, morningstarSectorCode ]	A list of column identifiers that are added to the table. The columns are displayed in the order specified by the array.
columnSizes	Record<string, number>	{}	An object that specifies column sizes where key is a column identificator and value is a column width in pixels. If the object does not contain a column width, then default width is used.
filters	RadarFilters	{}	An object that defines enabled filters and their parameters.
sort	RadarSort	{ columnId: 'marketCap', direction: 'desc' }	An object that defines table sort.
candlePeriod	CandlePeriod	'1d'	A string value defining candle period used in some columns.
selectedSymbol Optional	string	undefined	A string containing the symbol selected in the table.

Data

Data is an object that represents the readonly data of the widget.

Type

interface RadarWidgetData {
  symbols: string[],
}

Properties

Name	Type	Default	Description
symbols	string[]	[]	Instruments

Type Reference

Slot

Type

'header'

---

RadarSort

An object that defines table sort.

Type

{
  columnId: string,
  direction: SortDirection,
}

---

RadarFilters

Type

Record<string, RadarFilter>

---

RadarFilter

Type

NumericFilter | ListFilter

---

CandlePeriod

Type

'1m' | '2m ' | '3m ' | '4m' | '5m' | '10m' | '15m' | '30m' | '1h' | '2h ' | '4h ' | '1d' | '1w' | '1mo' | '1y'

---

ToolbarSelectorViewMode

Type

'available' | 'hidden'

---

SortDirection

Direction of the sort.

Type

'asc' | 'desc'

---

NumericFilter

Type

{
  type: 'numeric',
  value: NumericFilterData,
}

---

ListFilter

Type

{
  type: 'list',
  value: NonEmptyArray<string>,
}

---

NumericFilterData

Type

{
  value: NumericFilterStrictRange,
  predefinedKey?: string,
}

---

NumericFilterStrictRange

Type

{
    from: number,
    to: number,
} | {
    from: number,
} | {
    to: number,
}

---

NonEmptyArray

Type

[T, ...T[]]

---

LocaleSettings

An object that defines the language and regional settings of the widget.

Type

{
  language: Language,
  dateLocale: string,
}

---

Language

Type

'en' | 'de' | 'ar'