diff --git a/Gruntfile.js b/Gruntfile.js
index c0ff8f15..41130226 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -86,7 +86,7 @@
       connect: {
         server: {
           options: {
-            port: 3000,
+            port: 3030,
             hostname: '*', // Allow connection from mobile
             livereload: true
           }
diff --git a/package.json b/package.json
index 70d70b54..d273c258 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@carecloud/the-graph",
-  "version": "0.12.0",
+  "version": "0.12.1",
   "description": "flow-based programming graph editing",
   "author": "Forrest Oliphant, the Grid",
   "license": "MIT",
@@ -16,6 +16,7 @@
     "font-awesome": "^4.6.3",
     "hammerjs": "^2.0.8",
     "klayjs-noflo": "^0.3.1",
+    "phantomjs": "^2.1.7",
     "tv4": "^1.3.0",
     "yargs": "^10.0.3"
   },
diff --git a/the-graph/mixins.js b/the-graph/mixins.js
index 1d3ca5f4..961671f1 100644
--- a/the-graph/mixins.js
+++ b/the-graph/mixins.js
@@ -1,4 +1,5 @@
 var ReactDOM = require('react-dom');
+var getEventPosition = require('./the-graph-library').getEventPosition;
 // React mixins
 
 // Show fake tooltip
@@ -7,11 +8,13 @@ var Tooltip = {
   showTooltip: function (event) {
     if ( !this.shouldShowTooltip() ) { return; }
 
+    // Get mouse position
+    var position = getEventPosition(event);
     var tooltipEvent = new CustomEvent('the-graph-tooltip', { 
       detail: {
         tooltip: this.props.label,
-        x: event.clientX,
-        y: event.clientY
+        x: position.x,
+        y: position.y
       }, 
       bubbles: true
     });
diff --git a/the-graph/render.js b/the-graph/render.js
index 4deb9f34..294eacdb 100644
--- a/the-graph/render.js
+++ b/the-graph/render.js
@@ -189,7 +189,6 @@ function renderGraph(graph, options) {
         graph: graph,
         library: options.library,
     };
-    //console.log('render', props);
 
     var wrapper = document.createElement('div');
     wrapper.className = options.theme;
diff --git a/the-graph/the-graph-app.js b/the-graph/the-graph-app.js
index efd44093..982f8325 100644
--- a/the-graph/the-graph-app.js
+++ b/the-graph/the-graph-app.js
@@ -204,9 +204,12 @@ module.exports.register = function (context) {
       }
 
       // Safari is wheelDeltaY
+      var position = TheGraph.library.getEventPosition(event);
+
       this.zoomFactor += event.deltaY ? event.deltaY : 0-event.wheelDeltaY;
-      this.zoomX = event.clientX;
-      this.zoomY = event.clientY;
+      this.zoomX = position.x;
+      this.zoomY = position.y;
+
       requestAnimationFrame(this.scheduleWheelZoom);
     },
     scheduleWheelZoom: function () {
@@ -496,19 +499,19 @@ module.exports.register = function (context) {
       if (event.preventTap) { event.preventTap(); }
 
       // Get mouse position
-      var x = event.x || event.clientX || 0;
-      var y = event.y || event.clientY || 0;
+      var position = TheGraph.library.getEventPosition(event);
+
       if (event.touches && event.touches.length) {
-        x = event.touches[0].clientX;
-        y = event.touches[0].clientY;
+        position.x = event.touches[0].clientX;
+        position.y = event.touches[0].clientY;
       }
 
       // App.showContext
       this.showContext({
         element: this,
         type: "main",
-        x: x,
-        y: y,
+        x: position.x,
+        y: position.y,
         graph: this.props.graph,
         itemKey: 'graph',
         item: this.props.graph
diff --git a/the-graph/the-graph-edge.js b/the-graph/the-graph-edge.js
index 9d658061..41f783e5 100644
--- a/the-graph/the-graph-edge.js
+++ b/the-graph/the-graph-edge.js
@@ -114,19 +114,20 @@ module.exports.register = function (context) {
       if (event.gesture) {
         event = event.gesture.srcEvent; // unpack hammer.js gesture event 
       }
-      var x = event.x || event.clientX || 0;
-      var y = event.y || event.clientY || 0;
+
+      var position = TheGraph.library.getEventPosition(event);
+
       if (event.touches && event.touches.length) {
-        x = event.touches[0].clientX;
-        y = event.touches[0].clientY;
+        position.x = event.touches[0].clientX;
+        position.y = event.touches[0].clientY;
       }
 
       // App.showContext
       this.props.showContext({
         element: this,
         type: (this.props.export ? (this.props.isIn ? "graphInport" : "graphOutport") : "edge"),
-        x: x,
-        y: y,
+        x: position.x,
+        y: position.y,
         graph: this.props.graph,
         itemKey: (this.props.export ? this.props.exportKey : null),
         item: (this.props.export ? this.props.export : this.props.edge)
diff --git a/the-graph/the-graph-graph.js b/the-graph/the-graph-graph.js
index 803b63b8..19e3d0a4 100644
--- a/the-graph/the-graph-graph.js
+++ b/the-graph/the-graph-graph.js
@@ -205,19 +205,18 @@ module.exports.register = function (context) {
         event = event.gesture.srcEvent; // unpack hammer.js gesture event 
       }
 
-      var x = event.x || event.clientX || 0;
-      var y = event.y || event.clientY || 0;
+      var position = TheGraph.library.getEventPosition(event);
+
       if (event.touches && event.touches.length) {
-        x = event.touches[0].clientX;
-        y = event.touches[0].clientY;
+        position.x = event.touches[0].clientX;
+        position.y = event.touches[0].clientY;
       }
 
-      x -= this.props.app.state.offsetX || 0;
-      y -= this.props.app.state.offsetY || 0;
+      // The scale is used here to adapt the edgePreview position if a scale change occurs (wheel scroll)
       var scale = this.props.app.state.scale;
       this.setState({
-        edgePreviewX: (x - this.props.app.state.x) / scale,
-        edgePreviewY: (y - this.props.app.state.y) / scale
+        edgePreviewX: (position.x - this.props.app.state.x) / scale,
+        edgePreviewY: (position.y - this.props.app.state.y) / scale
       });
       this.markDirty();
     },
diff --git a/the-graph/the-graph-group.js b/the-graph/the-graph-group.js
index 9abb151d..684dbf0d 100644
--- a/the-graph/the-graph-group.js
+++ b/the-graph/the-graph-group.js
@@ -66,19 +66,20 @@ module.exports.register = function (context) {
       if (event.gesture) {
         event = event.gesture.srcEvent; // unpack hammer.js gesture event 
       }
-      var x = event.x || event.clientX || 0;
-      var y = event.y || event.clientY || 0;
+
+      var position = TheGraph.library.getEventPosition(event);
+
       if (event.touches && event.touches.length) {
-        x = event.touches[0].clientX;
-        y = event.touches[0].clientY;
+        position.x = event.touches[0].clientX;
+        position.y = event.touches[0].clientY;
       }
 
       // App.showContext
       this.props.showContext({
         element: this,
         type: (this.props.isSelectionGroup ? "selection" : "group"),
-        x: x,
-        y: y,
+        x: position.x,
+        y: position.y,
         graph: this.props.graph,
         itemKey: this.props.label,
         item: this.props.item
diff --git a/the-graph/the-graph-library.js b/the-graph/the-graph-library.js
index 4a0d98ff..03ee95cb 100644
--- a/the-graph/the-graph-library.js
+++ b/the-graph/the-graph-library.js
@@ -151,8 +151,54 @@ function libraryFromGraph(fbpGraph) {
     return library;
 }
 
+/**
+ * Returns offsets for mouse position.
+ *
+ * This function need to calculate correct offset in case the-graph
+ * used as positioned in not (0, 0) coordinates.
+ *
+ * @param initialElement - event target.
+ * @param upperElement - upper the-graph element (see usages for example).
+ * @returns {{top: number, left: number}}
+ */
+function getOffsetUpToElement(initialElement, upperElement) {
+  var offset = {top: 0, left: 0};
+  var offsetParent = initialElement;
+
+  while (offsetParent != null && offsetParent != upperElement) {
+    offset.left += offsetParent.offsetLeft || 0;
+    offset.top  += offsetParent.offsetTop || 0;
+    offsetParent = offsetParent.parentElement;
+  }
+
+  return offset;
+}
+
+
+/**
+ * Returns the position {y: Y, x: X} where the provided event was triggered.
+ *
+ * @param event - event triggered from the UI.
+ * @returns {{y: number, x: number}}
+ */
+function getEventPosition(event) {
+  var offset = getOffsetUpToElement(event.currentTarget, event.target);
+
+  // The offset should be applied only to clientX/Y if layerX/Y don't exist.
+  // TODO: Check if there is another way of doing this without using layerX/Y.
+  // The use of clientX/Y works in most cases except when there is margin/padding in parent elements
+  // That affects the value of `offset`.
+  return {
+    y: event.layerY || (event.clientY - offset.top) || 0,
+    x: event.layerX || (event.clientX - offset.left) || 0
+  };
+}
+
+
 module.exports = {
   mergeComponentDefinition: mergeComponentDefinition,
   componentsFromGraph: componentsFromGraph,
   libraryFromGraph: libraryFromGraph,
+  getOffsetUpToElement: getOffsetUpToElement,
+  getEventPosition: getEventPosition,
 };
diff --git a/the-graph/the-graph-node.js b/the-graph/the-graph-node.js
index 680cad78..6fd2539d 100644
--- a/the-graph/the-graph-node.js
+++ b/the-graph/the-graph-node.js
@@ -232,19 +232,20 @@ module.exports.register = function (context) {
       if (event.gesture) {
         event = event.gesture.srcEvent; // unpack hammer.js gesture event 
       }
-      var x = event.x || event.clientX || 0;
-      var y = event.y || event.clientY || 0;
+
+      var position = TheGraph.library.getEventPosition(event);
+
       if (event.touches && event.touches.length) {
-        x = event.touches[0].clientX;
-        y = event.touches[0].clientY;
+        position.x = event.touches[0].clientX;
+        position.y = event.touches[0].clientY;
       }
 
       // App.showContext
       this.props.showContext({
         element: this,
         type: (this.props.export ? (this.props.isIn ? "graphInport" : "graphOutport") : "node"),
-        x: x,
-        y: y,
+        x: position.x,
+        y: position.y,
         graph: this.props.graph,
         itemKey: (this.props.export ? this.props.exportKey : this.props.nodeID),
         item: (this.props.export ? this.props.export : this.props.node)
diff --git a/the-graph/the-graph-port.js b/the-graph/the-graph-port.js
index b9072833..4dc69d81 100644
--- a/the-graph/the-graph-port.js
+++ b/the-graph/the-graph-port.js
@@ -91,19 +91,20 @@ module.exports.register = function (context) {
       if (event.gesture) {
         event = event.gesture.srcEvent; // unpack hammer.js gesture event 
       }
-      var x = event.x || event.clientX || 0;
-      var y = event.y || event.clientY || 0;
+
+      var position = TheGraph.library.getEventPosition(event);
+
       if (event.touches && event.touches.length) {
-        x = event.touches[0].clientX;
-        y = event.touches[0].clientY;
+        position.x = event.touches[0].clientX;
+        position.y = event.touches[0].clientY;
       }
 
       // App.showContext
       this.props.showContext({
         element: this,
         type: (this.props.isIn ? "nodeInport" : "nodeOutport"),
-        x: x,
-        y: y,
+        x: position.x,
+        y: position.y,
         graph: this.props.graph,
         itemKey: this.props.label,
         item: this.props.port