Allow list as style parameter

Author: Stefan Kuethe

docs/showcase/style-expressions.md

@@ -1,3 +1,34 @@
 # Style expressions
 
 <iframe src="https://marimo.app/l/5a5k2w?embed=true" width="100%" height=700 frameBorder="0"></iframe>
+
+```python
+advanced_style = [
+    {
+        "filter": [">", ["get", "pop_max"], 10000000],
+        "style": {
+            "text-value": [
+                "concat",
+                ["get", "adm1name"],
+                ", ",
+                ["get", "adm0name"],
+            ],
+            "text-font": "16px sans-serif",
+            "text-fill-color": "white",
+            "text-stroke-color": "gray",
+            "text-stroke-width": 2,
+        },
+    },
+    {
+        "else": True,
+        "filter": [">", ["get", "pop_max"], 5000000],
+        "style": {
+            "text-value": ["get", "nameascii"],
+            "text-font": "12px sans-serif",
+            "text-fill-color": "white",
+            "text-stroke-color": "gray",
+            "text-stroke-width": 2,
+        },
+    },
+]
+```

examples/standalone/style_expressions.py

@@ -0,0 +1,64 @@
+import openlayers as ol
+
+polygons = ol.VectorLayer(
+    background="#1a2b39",
+    source=ol.VectorSource(
+        url="https://d2ad6b4ur7yvpq.cloudfront.net/naturalearth-3.3.0/ne_110m_land.geojson"
+    ),
+    style=ol.FlatStyle(
+        fill_color="darkgrey",
+    ),
+)
+
+points = ol.VectorLayer(
+    source=ol.VectorSource(
+        url="https://d2ad6b4ur7yvpq.cloudfront.net/naturalearth-3.3.0/ne_50m_populated_places_simple.geojson"
+    ),
+    style=ol.FlatStyle(
+        circle_radius=["get", "scalerank"],
+        circle_fill_color="gray",
+        circle_stroke_color="white",
+    ),
+)
+
+# ---
+advanced_style = [
+    {
+        "filter": [">", ["get", "pop_max"], 10000000],
+        "style": {
+            "text-value": [
+                "concat",
+                ["get", "adm1name"],
+                ", ",
+                ["get", "adm0name"],
+            ],
+            "text-font": "16px sans-serif",
+            "text-fill-color": "white",
+            "text-stroke-color": "gray",
+            "text-stroke-width": 2,
+        },
+    },
+    {
+        "else": True,
+        "filter": [">", ["get", "pop_max"], 5000000],
+        "style": {
+            "text-value": ["get", "nameascii"],
+            "text-font": "12px sans-serif",
+            "text-fill-color": "white",
+            "text-stroke-color": "gray",
+            "text-stroke-width": 2,
+        },
+    },
+]
+# ---
+
+text = ol.VectorLayer(
+    declutter = False,
+    source=ol.VectorSource(
+        url="https://d2ad6b4ur7yvpq.cloudfront.net/naturalearth-3.3.0/ne_50m_populated_places_simple.geojson"
+    ),
+    style=advanced_style
+)
+
+m = ol.Map(layers=[polygons, points, text])
+m.save()

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "openlayers"
-version = "0.1.1"
+version = "0.1.2-rc.1"
 description = "Python Bindings for OpenLayersJS"
 readme = "README.md"
 authors = [{ name = "Stefan Kuethe", email = "[email protected]" }]

src/openlayers/models/layers.py

@@ -34,7 +34,7 @@ class TileLayer(Layer): ...
 
 
 class VectorTileLayer(Layer):
-    style: dict | FlatStyle | None = default_style()
+    style: dict | FlatStyle | list | None = default_style()
 
     @field_validator("style")
     def validate_style(cls, v):