A MapLibre layer of any type.

<HoloMap.Layer
  id="parcels-fill"
  type="fill"
  source="parcels"
  paint={%{fill_color: "#3b82f6", fill_opacity: 0.4}}
/>

Prefer the type-specific components: HoloMap.Layer.Fill, HoloMap.Layer.Line, HoloMap.Layer.Circle, HoloMap.Layer.Symbol, HoloMap.Layer.Raster, HoloMap.Layer.Heatmap, HoloMap.Layer.Hillshade, HoloMap.Layer.FillExtrusion. They document the paint properties that apply to them and reject a mismatched type at compile time. Reach for this one when the type is computed at runtime.

Props

Ordering

Layers stack in the order MapLibre received them, which is the order the components appear in the template. before_id overrides that when a layer has to sit beneath one it is not written next to, such as a highlight layer under a label layer that belongs to the base style, for example.

Events

on_click, on_dbl_click, on_context_menu, on_mouse_enter, on_mouse_leave, on_mouse_move, on_mouse_down, on_mouse_up, on_touch_start, on_touch_end.

Handlers receive layer, lng_lat, point and features, which holds the features under the pointer, each with id, source, source_layer, properties and geometry:

def action(:parcel_clicked, params, component) do
  case params.features do
    [%{properties: %{parcel_id: id}} | _rest] -> put_state(component, :selected, id)
    [] -> component
  end
end