Merge pull request #572 from m1ga/centerPoly

feat(android): polygon bounds

android/manifest

@@ -2,7 +2,7 @@
 # this is your module manifest and used by Titanium
 # during compilation, packaging, distribution, etc.
 #
-version: 5.5.3
+version: 5.6.0
 apiversion: 4
 architectures: arm64-v8a armeabi-v7a x86 x86_64
 description: External version of Map module using native Google Maps library

android/src/ti/map/PolygonProxy.java

@@ -9,6 +9,7 @@
 import android.app.Activity;
 import android.os.Message;
 import com.google.android.gms.maps.model.LatLng;
+import com.google.android.gms.maps.model.LatLngBounds;
 import com.google.android.gms.maps.model.Polygon;
 import com.google.android.gms.maps.model.PolygonOptions;
 import com.google.maps.android.PolyUtil;
@@ -304,6 +305,27 @@ else if (name.equals(TiC.PROPERTY_TOUCH_ENABLED)) {
 		}
 	}
 
+	@Kroll.getProperty
+	public HashMap getBounds()
+	{
+		if (polygon == null) {
+			return null;
+		}
+		final LatLngBounds.Builder centerBuilder = LatLngBounds.builder();
+		List<LatLng> points = polygon.getPoints();
+		for (LatLng point : points) {
+			centerBuilder.include(point);
+		}
+
+		LatLngBounds llb = centerBuilder.build();
+		HashMap hm = new HashMap();
+		hm.put(TiC.PROPERTY_LONGITUDE, llb.getCenter().longitude);
+		hm.put(TiC.PROPERTY_LATITUDE, llb.getCenter().latitude);
+		hm.put(TiC.PROPERTY_LATITUDE_DELTA, Math.abs(llb.northeast.latitude - llb.southwest.latitude));
+		hm.put(TiC.PROPERTY_LONGITUDE_DELTA, Math.abs(llb.northeast.longitude - llb.southwest.longitude));
+		return hm;
+	}
+
 	public String getApiName()
 	{
 		return "Ti.Map.Polygon";

apidoc/Polygon.yml

@@ -57,3 +57,9 @@ properties:
     availability: creation
     type: Number
     platforms: [android]
+
+  - name: bounds
+    summary: Returns the bounding box of the polygon. Useful to center the region.
+    type: MapRegionTypev2
+    platforms: [android]
+    since: "12.3.0"