diff -r fe71fdbc6663 -r dd526b1b283a client/js/renderer/viewrepr.js
--- a/client/js/renderer/viewrepr.js	Thu Jun 18 17:18:15 2015 +0200
+++ b/client/js/renderer/viewrepr.js	Wed Jun 24 17:15:22 2015 +0200
@@ -15,18 +15,38 @@
             this.$ = $(".Rk-Render");
             this.type = "View";
             this.hiddenNodes = [];
+            this.scale = 1;
+            this.initialScale = 1;
+            this.offset = paper.view.center;
             
-//            this.$.find(".Rk-ZoomSetSaved").click( function() {
-//                var view = _this.renkan.project.get("views").last();
-//                if(view){
-//                    //_this.setScale(view.get("zoom_level"), new paper.Point(view.get("offset")));
-                _this.showNodes(false);
-                if (this.options.hide_nodes){
-                    this.hiddenNodes = (this.model.get("hidden_nodes") || []).concat();
-                    this.hideNodes();                    
+            var bindClick = function(selector, fname) {
+                _this.$.find(selector).click(function(evt) {
+                    _this[fname](evt);
+                    return false;
+                });
+            };
+            
+            bindClick(".Rk-ZoomOut", "zoomOut");
+            bindClick(".Rk-ZoomIn", "zoomIn");
+            bindClick(".Rk-ZoomFit", "autoScale");
+            
+            this.$.find(".Rk-ZoomSave").click( function() {
+                var offset = {};
+                offset.x = _this.offset.x;
+                offset.y = _this.offset.y;
+                _this.model.set( { zoom_level:_this.scale, offset:offset, hidden_nodes: _this.hiddenNodes.concat() } );
+            });
+            
+            this.$.find(".Rk-ZoomSetSaved").click( function() {
+                if(_this.model){
+                    _this.setScale(_this.model.get("zoom_level"), new paper.Point(_this.model.get("offset")));
+                    _this.showNodes(false);
+                    if (_this.options.hide_nodes){
+                        _this.hiddenNodes = (_this.model.get("hidden_nodes") || []).concat();
+                        _this.hideNodes();
+                    }
                 }
-//                }
-//            });
+            });
             
             this.$.find(".Rk-ShowHiddenNodes").mouseenter( function() {
                 _this.showNodes(true);
@@ -43,6 +63,7 @@
             }
         },
         redraw: function(options) {
+            //console.log("redraw view repr");
         },
         addHiddenNode: function(_model){
             this.hideNode(_model);
@@ -75,6 +96,69 @@
             }
             paper.view.draw();
         },
+        setScale: function(_newScale, _offset) {
+            if ((_newScale/this.initialScale) > Utils._MIN_SCALE && (_newScale/this.initialScale) < Utils._MAX_SCALE) {
+                this.scale = _newScale;
+                this.renderer.scale = _newScale;
+                if (_offset) {
+                    this.offset = _offset;
+                    this.renderer.offset = _offset;
+                }
+                this.renderer.redraw();
+            }
+        },
+        zoomOut: function() {
+            var _newScale = this.scale * Math.SQRT1_2,
+            _offset = new paper.Point([
+                                       this.renderer.canvas_$.width(),
+                                       this.renderer.canvas_$.height()
+                                       ]).multiply( 0.5 * ( 1 - Math.SQRT1_2 ) ).add(this.offset.multiply( Math.SQRT1_2 ));
+            this.setScale( _newScale, _offset );
+        },
+        zoomIn: function() {
+            var _newScale = this.scale * Math.SQRT2,
+            _offset = new paper.Point([
+                                       this.renderer.canvas_$.width(),
+                                       this.renderer.canvas_$.height()
+                                       ]).multiply( 0.5 * ( 1 - Math.SQRT2 ) ).add(this.offset.multiply( Math.SQRT2 ));
+            this.setScale( _newScale, _offset );
+        },
+        resizeZoom: function(_scaleWidth, _scaleHeight, _ratio) {
+            var _newScale = this.scale * _ratio,
+                _offset = new paper.Point([
+                                       (this.offset.x * _scaleWidth),
+                                       (this.offset.y * _scaleHeight)
+                                       ]);
+            this.setScale( _newScale, _offset );
+        },
+        autoScale: function(force_view) {
+            var nodes = this.renkan.project.get("nodes");
+            if (nodes.length > 1) {
+                var _xx = nodes.map(function(_node) { return _node.get("position").x; }),
+                _yy = nodes.map(function(_node) { return _node.get("position").y; }),
+                _minx = Math.min.apply(Math, _xx),
+                _miny = Math.min.apply(Math, _yy),
+                _maxx = Math.max.apply(Math, _xx),
+                _maxy = Math.max.apply(Math, _yy);
+                var _scale = Math.min( (paper.view.size.width - 2 * this.renkan.options.autoscale_padding) / (_maxx - _minx), (paper.view.size.height - 2 * this.renkan.options.autoscale_padding) / (_maxy - _miny));
+                this.initialScale = _scale;
+                // Override calculated scale if asked
+                if((typeof force_view !== "undefined") && parseFloat(force_view.zoom_level)>0 && parseFloat(force_view.offset.x)>0 && parseFloat(force_view.offset.y)>0){
+                    this.setScale(parseFloat(force_view.zoom_level), new paper.Point(parseFloat(force_view.offset.x), parseFloat(force_view.offset.y)));
+                }
+                else{
+                    this.setScale(_scale, paper.view.center.subtract(new paper.Point([(_maxx + _minx) / 2, (_maxy + _miny) / 2]).multiply(_scale)));
+                }
+            }
+            if (nodes.length === 1) {
+                this.setScale(1, paper.view.center.subtract(new paper.Point([nodes.at(0).get("position").x, nodes.at(0).get("position").y])));
+            }
+        },
+        paperShift: function(_delta) {
+            this.offset = this.offset.add(_delta);
+            this.renderer.offset = this.renderer.offset.add(_delta);
+            this.renderer.redraw();
+        },
     }).value();
 
     return ViewRepr;