postDraw sample

www/main.html

@@ -154,6 +154,8 @@
                 
                 graph.smooth = true; // Can change on fly
 
+                graph.postDraw = postDraw;
+
                 let amount = Math.random() * graph.getLength() * 1.4;
                 for (let v = 0; v < amount; v++) {
                     graph.add( Math.random() * 100 );
@@ -178,6 +180,15 @@
                 }
             }
 
+            function postDraw(graph) {
+                graph.ctx.beginPath();
+                
+                graph.ctx.moveTo(0, 100);
+                graph.ctx.lineTo(10000, 100);
+
+                graph.ctx.stroke();
+            }
+
             function callbackData(data) {
                 console.log(data);
             }