TextMarker

TextMarker is the abstract base class for point markers with text, inheriting from Marker. It describes a marker that contains both a text content and a background box; TextBox and Label both inherit from it. It is an abstract class that is not meant to be instantiated directly, but it manages text via getContent/setContent and splits it into a text symbol and a box symbol.

import { TextBox } from "maptalks";
// Abstract base class, normally use its subclasses TextBox / Label
const textbox = new TextBox("This is a textbox", [0, 0], 200, 90);

Constructor

new TextMarker(coordinates, options)

Parameters:

• coordinates — The geographic coordinates of the marker ([x, y] or a Coordinate).
• options — Construct options, inherited from Marker.
• Note: TextMarker is an abstract class; its constructor is intended for subclasses only.

options

TextMarker has no options of its own; configuration is inherited from Marker (e.g. symbol, draggable, zIndex, properties).

Methods

• getContent(): string — Gets the text content of the label.
• setContent(content): this — Sets a new text content and fires the contentchange event.
• toJSON() — Serializes to a JSON object, removing the default symbol field from the base class.
• setSymbol(symbol): this — Sets the symbol, splitting properties beginning with text* into the text symbol and the rest into the box symbol.

Static Methods

TextMarker has no static methods of its own.

Events

• contentchange — Fired when the text content changes; the event object carries old and new fields.