Types and interfaces
Types of interfaces used in the constructors, options and functions of the Marker Layout library.
MarkerAnchor
The possible anchor points values:
"center" |
"top" |
"bottom" |
"left" |
"right"
AbstractMarker
The type AbstractMarker is a simple data structure that hold information about a marker (position, size) and the list of vector features
it is supposed to contain.
| id | Unique ID of a marker, most likely the ID of a geojson feature (from a vector tile) |
|---|---|
| position | Position in screen space of the top-left corner [x, y] |
| size | Size in screen space [width, height] |
featuresMapGeoJSONFeature |
The feature represented by the marker |
| internalElementSize | Size of each internal elements (useful for when a marker contain multiple vector features) |
MarkerMap
The type MarkerMap is simply a
JS Map of
AbstractMarker. The key of this map (number) is a hash
specific to one of multiple vector features contained by a marker.
If you want to add an extra caching logic, you may want to track this ID,
otherwise it’s only used internally and is of little interest at application level.
MarkerStatus
An object of type MarkerStatus is a simple data structure that contains
the status of the marker compared to the previous status.
| new | The markers that were added since the last update() |
|---|---|
| updated | The markers that were already present in the last update but had their position changed |
| removed | The markers that are no longer present since the last update |
