Add method to update deckgl layers

docs/examples/deckgl_layer/app_update_layer.py

@@ -0,0 +1,77 @@
+# Shiny Express App
+
+import json
+
+from maplibre import Map, MapContext, MapOptions, render_maplibregl
+from maplibre.basemaps import Carto
+from maplibre.ui import use_deckgl
+from shiny import reactive
+from shiny.express import input, render, ui
+
+m = Map(
+    MapOptions(
+        style=Carto.POSITRON,
+        center=(-122.4, 37.74),
+        zoom=12,
+        hash=True,
+        pitch=40,
+    )
+)
+
+layer_id = "GridLayer"
+
+CELL_SIZES = [100, 200, 300]
+DEFAULT_CELL_SIZE = CELL_SIZES[1]
+
+
+def deck_grid_layer(cell_size: int = DEFAULT_CELL_SIZE):
+    return {
+        "@@type": layer_id,
+        "id": "GridLayer",
+        "data": "https://raw.githubusercontent.com/visgl/deck.gl-data/master/website/sf-bike-parking.json",
+        "extruded": True,
+        "getPosition": "@@=COORDINATES",
+        "getColorWeight": "@@=SPACES",
+        "getElevationWeight": "@@=SPACES",
+        "elevationScale": 4,
+        "cellSize": cell_size,
+        "pickable": True,
+    }
+
+
+m.add_deck_layers([deck_grid_layer()], tooltip_template="Number of points: {{ count }}")
+
+# Shiny Express
+use_deckgl()
+
+ui.input_select(
+    "cell_size", "Cell size", choices=CELL_SIZES, selected=DEFAULT_CELL_SIZE
+)
+ui.input_action_button("update_layer", "Update layer")
+
+
+@render_maplibregl
+def render_map():
+    return m
+
+
+@render.code
+def picking_object():
+    obj = input.render_map_layer_GridLayer()
+    print(obj)
+    # return json.dumps(obj, indent=2) if obj else "Pick a feature!"
+    # return f"{obj['count']}" if obj else "Pick a feature!"
+    return json.dumps(obj["points"], indent=2) if obj else "Pick a feature!"
+
+
+@reactive.Effect
+@reactive.event(input.update_layer)
+async def update_layer():
+    print(input.update_layer())
+    async with MapContext("render_map") as m:
+        m.set_deck_layers([deck_grid_layer(input.cell_size())])
+
+
+if __name__ == "__main__":
+    with open("docs/examples/deckgl_layer/app.html", "w") as f:
+        f.write(m.to_html())

maplibre/map.py

@@ -277,4 +277,8 @@ def to_html(self, title: str = "My Awesome Map", **kwargs) -> str:
     def add_deck_layers(
         self, layers: list[dict], tooltip_template: str | dict = None
     ) -> None:
+        """Add Deck.GL layers to the layer stack"""
         self.add_call("addDeckOverlay", layers, tooltip_template)
+
+    def set_deck_layers(self, layers: list[dict]):
+        self.add_call("setDeckLayers", layers)