Update README.md

README.md

@@ -3,22 +3,46 @@ generic  map layers for leaflet 0.7 and 1.0-rc, moving from original GIST here h
 
 L.CanvasLayer API:
 
-##API:
+##API
 
 |methods       | description            | 
 | ------------- |:-------------| 
 |needRedraw   | will schedule next frame call for drawLayer|
+|delegate(object)   | optionaly set receiver of the events if not 'inheriting' from L.CanvasLayer |
 
 
 events          | description            | 
 | ------------- |:-------------| 
 |onLayerDidMount   | after layer is attached/added to the map|
 |onLayerWillUnmount   | before  layer is removed from the map|
 |onDrawLayer(info)       | when layer is drawn , info contains view parameters like bounds, size, canvas etc.
-note :  events will be called only if presented on the 'subclass'
+note :  events will be called only if presented on the 'subclass' or if delegate(receiver) is set
 
-##  example 
+##  Examples 
+### Basic usage
+```javascript
+        L.canvasLayer()
+            .delegate(this) // -- if we do not inherit from L.CanvasLayer  we can setup a delegate to receive events from L.CanvasLayer
+            .addTo(leafletMap);
+
+        function onDrawLayer(info) {
+            var ctx = info.canvas.getContext('2d');
+            ctx.clearRect(0, 0, info.canvas.width, info.canvas.height);
+            ctx.fillStyle = "rgba(255,116,0, 0.2)";
+            for (var i = 0; i < data.length; i++) {
+                var d = data[i];
+                if (info.bounds.contains([d[0], d[1]])) {
+                    dot = info.layer._map.latLngToContainerPoint([d[0], d[1]]);
+                    ctx.beginPath();
+                    ctx.arc(dot.x, dot.y, 3, 0, Math.PI * 2);
+                    ctx.fill();
+                    ctx.closePath();
+                }
+            }
+        };
+```
 
+### Custom layer
 ```javascript
 
           myCustomCanvasDraw= function(){
@@ -44,7 +68,8 @@ note :  events will be called only if presented on the 'subclass'
           myLayer.addTo(leafletMap);
  ```   
 
+
 Other useful full view  Leaflet Canvas sources here:
 - [leaflet.heat](https://github.com/Leaflet/Leaflet.heat)
 - [Full Canvas] (https://github.com/cyrilcherian/Leaflet-Fullcanvas)
-- [CartoDb Leaflet.Canvas] (https://github.com/CartoDB/Leaflet.CanvasLayer)
+