✨ Add centerGraph option

src/cola.js

@@ -464,7 +464,14 @@ ColaLayout.prototype.run = function(){
   adaptor
     .avoidOverlaps( options.avoidOverlap )
     .handleDisconnected( options.handleDisconnected )
-    .start( options.unconstrIter, options.userConstIter, options.allConstIter)
+    .start(
+      options.unconstrIter,
+      options.userConstIter,
+      options.allConstIter,
+      undefined, // gridSnapIterations = 0
+      undefined, // keepRunning = true
+      options.centerGraph
+    )
   ;
 
   if( !options.infinite ){

src/defaults.js

@@ -22,6 +22,8 @@ let defaults = {
   flow: undefined, // use DAG/tree flow layout if specified, e.g. { axis: 'y', minSeparation: 30 }
   alignment: undefined, // relative alignment constraints on nodes, e.g. function( node ){ return { x: 0, y: 1 } }
   gapInequalities: undefined, // list of inequality constraints for the gap between the nodes, e.g. [{"axis":"y", "left":node1, "right":node2, "gap":25}]
+  centerGraph: true, // adjusts the node positions initially to center the graph (pass false if you want to start the layout from the current position)
+
 
   // different methods of specifying edge length
   // each can be a constant numerical value or a function like `function( edge ){ return 2; }`