Several issues fixed.

mindplot/src/main/javascript/BoardEntry.js

@@ -42,7 +42,7 @@ mindplot.BoardEntry = new Class({
     },
 
     setUpperLimit : function(value) {
-        $assert(value, "upper limit can not be null");
+        $assert(!isNaN(value), "upper limit can not be null");
         $assert(!isNaN(value), "illegal value");
         this._upperLimit = value;
     },
@@ -56,7 +56,7 @@ mindplot.BoardEntry = new Class({
     },
 
     setLowerLimit : function(value) {
-        $assert(value, "upper limit can not be null");
+        $assert(!isNaN(value), "upper limit can not be null");
         $assert(!isNaN(value), "illegal value");
         this._lowerLimit = value;
     },

mindplot/src/main/javascript/ConnectionLine.js

@@ -27,10 +27,10 @@ mindplot.ConnectionLine = new Class({
 
         var strokeColor = mindplot.ConnectionLine.getStrokeColor();
         var line;
+        var ctrlPoints = this._getCtrlPoints(sourceNode, targetNode);
         if (targetNode.getType() == mindplot.model.INodeModel.CENTRAL_TOPIC_TYPE) {
             line = this._createLine(lineType, mindplot.ConnectionLine.CURVED);
             if (line.getType() == "CurvedLine") {
-                var ctrlPoints = this._getCtrlPoints(sourceNode, targetNode);
                 line.setSrcControlPoint(ctrlPoints[0]);
                 line.setDestControlPoint(ctrlPoints[1]);
             }
@@ -38,11 +38,9 @@ mindplot.ConnectionLine = new Class({
         } else {
             line = this._createLine(lineType, mindplot.ConnectionLine.SIMPLE_CURVED);
             if (line.getType() == "CurvedLine") {
-                var ctrlPoints = this._getCtrlPoints(sourceNode, targetNode);
                 line.setSrcControlPoint(ctrlPoints[0]);
                 line.setDestControlPoint(ctrlPoints[1]);
             }
-            //        line = new web2d.PolyLine();
             line.setStroke(1, 'solid', strokeColor);
         }
 

mindplot/src/main/javascript/Designer.js

@@ -333,8 +333,10 @@ mindplot.Designer = new Class({
             $assert(targetTopic, "targetTopic can not be null");
 
             // Create a new topic model ...
+            // @Todo: Model should not be modified from here ...
             var mindmap = this.getMindmap();
             var model = mindmap.createRelationship(sourceTopic.getModel().getId(), targetTopic.getModel().getId());
+
             this._actionDispatcher.connectByRelation(model);
         },
 

mindplot/src/main/javascript/Topic.js

@@ -319,6 +319,8 @@ mindplot.Topic = new Class({
 
     addIcon : function(iconType) {
         var iconGroup = this.getOrBuildIconGroup();
+        this.closeEditors();
+
         var model = this.getModel();
 
         // Update model ...