--- a/client/js/renderer/viewrepr.js	Thu Jun 25 18:09:49 2015 +0200
+++ b/client/js/renderer/viewrepr.js	Tue Aug 04 18:02:54 2015 +0200
@@ -97,6 +97,7 @@
         addHiddenNode: function(_model){
             this.hideNode(_model);
             this.hiddenNodes.push(_model.id);
+            this.updateUrl();
         },
         hideNode: function(_model){
             if (typeof this.renderer.getRepresentationByModel(_model) !== 'undefined'){
@@ -132,6 +133,7 @@
                     this.offset = _offset;
                 }
                 this.renderer.redraw();
+                this.updateUrl();
             }
         },
         zoomOut: function() {
@@ -183,9 +185,25 @@
         },
         paperShift: function(_delta) {
             this.offset = this.offset.add(_delta);
-            this.renderer.offset = this.renderer.offset.add(_delta);
             this.renderer.redraw();
         },
+        updateUrl: function(){
+            if(this.options.update_url){
+                var result = {};
+                var parameters = Backbone.history.getFragment().split('?');
+                if (parameters.length > 1){
+                    parameters[1].split("&").forEach(function(part) {
+                        var item = part.split("=");
+                        result[item[0]] = decodeURIComponent(item[1]);
+                    });
+                } 
+                result.view = Math.round(this.offset.x*1000)/1000 + ',' + Math.round(this.offset.y*1000)/1000 + ',' + Math.round(this.scale*1000)/1000;
+//                if (this.hiddenNodes.length > 0){
+//                    result.hiddenNodes = this.hiddenNodes.join();
+//                }
+                this.renkan.router.navigate("?" + decodeURIComponent($.param(result)), {trigger: false, replace: false});
+            }
+        },
     }).value();
 
     return ViewRepr;