SelectionController

---

The Selection controller allows you to listen for changes to the selection on the map.

Extended by

• FeltController

Methods

getSelection()

getSelection(): Promise<EntityNode[]>

Gets the current selection as a list of entity identifiers.

Returns

Promise<EntityNode[]>

Example

const selection = await felt.getSelection();

---

selectFeature()

selectFeature(params: FeatureSelection): Promise<void>

Selects a feature on a layer. This will show the feature's popup, modal or sidebar (if configured) and highlight the feature.

Parameters

Parameter	Type
params	FeatureSelection

Returns

Promise<void>

Example

felt.selectFeature({
  id: 123,
  layerId: "my-layer",
  showPopup: true,
  fitViewport: { maxZoom: 15 },
});

---

clearSelection()

clearSelection(params?: { features: boolean; elements: boolean; }): Promise<void>

Clears the current selection. This clears the selection of

Parameters

Parameter	Type	Description
params?	{ features: boolean; elements: boolean; }	The parameters to clear the selection. If this is not provided, both features and elements will be cleared.
params.features?	boolean	Whether to clear the features from the selection.
params.elements?	boolean	Whether to clear the elements from the selection.

Returns

Promise<void>

Example

// Removes all features and elements from the selection
felt.clearSelection();

// Removes only features from the selection
felt.clearSelection({ features: true });

// Removes only elements from the selection
felt.clearSelection({ elements: true });

Default

{ features: true, elements: true }

Events

onSelectionChange()

onSelectionChange(params: { handler: (change: { selection: EntityNode[]; }) => void; }): VoidFunction

Adds a listener for when the selection changes.

Parameters

Parameter	Type
params	{ handler: (change: { selection: EntityNode[]; }) => void; }
params.handler	(change: { selection: EntityNode[]; }) => void

Returns

VoidFunction

A function to unsubscribe from the listener

Example

const unsubscribe = felt.onSelectionChange({
  handler: ({selection}) => console.log(selection),
});

// later on...
unsubscribe();