/**
 * Project   : AMDA-NG
 * Name      : PlotTree.js
 * @class   amdaPlotComp.PlotTree
 * @extends Ext.tree.Panel
 * @brief   Tree to define all elements of a plot
 * @author  Benjamin Renard
 * @version $Id: PlotTree.js benjamin $
 */

Ext.define('amdaPlotComp.PlotTree', {
	extend: 'Ext.tree.Panel',
	
	requires: [
	           'amdaPlotObj.PlotTreeNode'
	],
	

	//Link to the combo box to define the use of the simplified view
	simplifiedViewCombo : null,
	
	//Link to the combo to attach the tab to the multi plot mode

	//Link to the Plot Element Panel
    plotElementPanel: null,

    
    //Link to the Plot Tab Content Panel
    plotTabContent : null,

	
	//Tab object

    tabObject: null,
	
	//Panels list node
	panelsNode: null,

	
	constructor: function(config) {
		this.init(config);	    
		this.callParent(arguments);
	},
	

	refresh: function() {
		this.getView().refresh();
	},
	

	buildTree: function(tabObject) {

		if (this.store.getRootNode().hasChildNodes())
			this.store.getRootNode().removeAll();
		
		this.tabObject = tabObject;

		this.simplifiedViewCombo.setValue(this.tabObject.get('tree-simplified-view'));
		this.linkToMultiPlotCombo.setValue(this.tabObject.get('multi-plot-linked'));
		
		if (!this.tabObject.get('tree-simplified-view'))

		{
			//Page Node
			var pageNode = this.store.getRootNode().appendChild(new amdaPlotObj.PlotPageTreeNode({object : tabObject}));

			//Layout node

			pageNode.appendChild(new amdaPlotObj.PlotLayoutTreeNode({object : tabObject}));

			//Panels node

			this.panelsNode = pageNode.appendChild(new amdaPlotObj.PlotPanelsTreeNode({object : tabObject}));

		}
		else
			this.panelsNode = this.store.getRootNode();
		
		this.buildPanelsNode();
	},
	

	buildPanelsNode: function(paramNodeToSelect) {

		if (this.panelsNode.hasChildNodes())
			this.panelsNode.removeAll();

		
		var me = this;

		this.tabObject.updatePanelIndex();

		this.tabObject.panels().each(function (panelObject) {

			me.addPanelNode(panelObject, paramNodeToSelect);

		});
	},
	

	buildPanelAxesNode: function(panelObject) {
		var axesNode = null;
		
		this.panelsNode.eachChild(function (panelNode) {
			//Retrieve corresponding panel node
			if (panelNode.object == panelObject)
			{
				//Retrieve axes node
				axesNode = panelNode.findChild('type', 'axes');
				if (!axesNode)
					//create axes node

					axesNode = panelNode.appendChild(new amdaPlotObj.PlotAxesTreeNode({object : panelObject}));

				return;
			}
		});

		if (axesNode == null)
			return;
		
		//Remove old axis nodes
		axesNode.removeAll();
		
		//Add axis nodes
		panelObject.axes().each(function (axisObject) {
			switch (axisObject.get('axis-type'))
			{
			case 'time' :
				axesNode.appendChild(new amdaPlotObj.PlotTimeAxisTreeNode({object : axisObject}));
				break;
			case 'epoch' :
				axesNode.appendChild(new amdaPlotObj.PlotEpochAxisTreeNode({object : axisObject}));
				break;
			case 'x' :
				axesNode.appendChild(new amdaPlotObj.PlotXAxisTreeNode({object : axisObject}));
				break;
			case 'y-left' :
				axesNode.appendChild(new amdaPlotObj.PlotYLeftAxisTreeNode({object : axisObject}));
				break;
			case 'y-right' :
				axesNode.appendChild(new amdaPlotObj.PlotYRightAxisTreeNode({object : axisObject}));
				break;
			case 'color' :
				axesNode.appendChild(new amdaPlotObj.PlotColorAxisTreeNode({object : axisObject}));
				break;
			}
		});
		this.getView().refresh();

	},
	

	buildPanelParamsNode: function(panelObject, selectedParamId) {
		selectedParamId = (typeof selectedParamId !== 'undefined') ? selectedParamId : '';
		

		var paramsNode = null;
		
		var me = this;
		this.panelsNode.eachChild(function (panelNode) {
			//Retrieve corresponding panel node
			if (panelNode.object == panelObject)
			{

				if (!me.tabObject.get('tree-simplified-view'))

				{
					//Retrieve params node
					paramsNode = panelNode.findChild('type', 'params');
					if (!paramsNode)
						//create axes node
						paramsNode = panelNode.appendChild(new amdaPlotObj.PlotParamsTreeNode({object : panelObject}));
				}
				else
					paramsNode = panelNode;
				return;
			}
		});
		
		if (paramsNode == null)
			return;
		
		//Remove old param nodes
		paramsNode.removeAll();
		
		//Add param nodes

		var selectedParamNode = null;

		panelObject.params().each(function (paramObject) {

			var paramNode = paramsNode.appendChild(new amdaPlotObj.PlotParamTreeNode({object : paramObject}));
			if (paramObject.get('id') == selectedParamId)
				selectedParamNode = paramNode;

		});
		this.getView().refresh();

		
		if (selectedParamNode)
			this.getSelectionModel().select(selectedParamNode);

	},
	

	buildPanelAdditionalObjectsNode: function(panelObject, selectedObject) {
		selectedObject = (typeof selectedObject !== 'undefined') ? selectedObject : null;

		var objectsNode = null;
		
		var me = this;
		this.panelsNode.eachChild(function (panelNode) {
			//Retrieve corresponding panel node
			if (panelNode.object == panelObject)
			{
				//Retrieve additional objects node
				objectsNode = panelNode.findChild('type', 'objects');
				if (!objectsNode)
				{
					//create additional objects node
					objectsNode = panelNode.appendChild(new amdaPlotObj.PlotAdditionalObjectsTreeNode({object : panelObject}));

				}
				return;
			}
		});
		
		if (objectsNode == null)
			return;
		

		//Remove old objects nodes
		objectsNode.removeAll();
		
		//create legends node

		this.buildPanelLegendsNode(panelObject, objectsNode, selectedObject);

		
		//create drawing objects node

		this.buildDrawingObjectsNode(panelObject, objectsNode, selectedObject);

		
		//create fills node
		this.buildFillsNode(panelObject, objectsNode, selectedObject);

	},
	

	buildPanelLegendsNode: function(panelObject, objectsNode, selectedObject) {

		var legendsNode = objectsNode.appendChild(new amdaPlotObj.PlotLegendsTreeNode({object : panelObject}));
		
		legendsNode.appendChild(new amdaPlotObj.PlotSeriesLegendTreeNode({object : panelObject}));
		

		var textLegendsNode = legendsNode.appendChild(new amdaPlotObj.PlotTextLegendsTreeNode({object : panelObject}));
		
		var selectedTextLegendNode = null;
		panelObject.textLegends().each(function (legendObject) {
			var textLegendNode = textLegendsNode.appendChild(new amdaPlotObj.PlotTextLegendTreeNode({object : legendObject}));

			if (legendObject == selectedObject)

				selectedTextLegendNode = textLegendNode;
		});
		
		this.getView().refresh();
		if (selectedTextLegendNode)
			this.getSelectionModel().select(selectedTextLegendNode);

	},
	

	buildDrawingObjectsNode: function(panelObject, objectsNode, selectedObject) {

		var drawingObjectsNode = objectsNode.appendChild(new amdaPlotObj.PlotDrawingObjectsTreeNode({object : panelObject}));
		

		//Constants

		var selectedConstantNode = null;
		panelObject.constants().each(function (constantObject) {
			var constantNode = drawingObjectsNode.appendChild(new amdaPlotObj.PlotConstantTreeNode({object : constantObject}));

			if (constantObject == selectedObject)

				selectedConstantNode = constantNode;
		});
		

		//Texts
		var selectedTextNode = null;
		panelObject.textObjs().each(function (textObject) {
			var textNode = drawingObjectsNode.appendChild(new amdaPlotObj.PlotTextTreeNode({object : textObject}));

			if (textObject == selectedObject)

				selectedTextNode = textNode;
		});
		

		//Curves
		var selectedCurveNode = null;
		panelObject.curves().each(function (curveObject) {
			var curveNode = drawingObjectsNode.appendChild(new amdaPlotObj.PlotCurveTreeNode({object : curveObject}));

			if (curveObject == selectedObject)

				selectedCurveNode = curveNode;
		});
		
		

		//Refresh & selection

		this.getView().refresh();
		if (selectedConstantNode)
			this.getSelectionModel().select(selectedConstantNode);

		
		if (selectedTextNode)
			this.getSelectionModel().select(selectedTextNode);

		
		if (selectedCurveNode)
			this.getSelectionModel().select(selectedCurveNode);

	},
	

	buildFillsNode: function(panelObject, objectsNode, selectedObject) {
		var fillsNode = objectsNode.appendChild(new amdaPlotObj.PlotFillsTreeNode({object : panelObject}));
		
		var selectedFillNode = null;
		panelObject.fills().each(function (fillObject) {
			var fillNode = fillsNode.appendChild(new amdaPlotObj.PlotFillTreeNode({object : fillObject}));
			if (fillObject == selectedObject)
				selectedFillNode = fillNode;
		});
		
		this.getView().refresh();
		if (selectedFillNode)
			this.getSelectionModel().select(selectedFillNode);
	},
	

	addPanelNode: function(panelObject, paramNodeToSelect) {

		var panelNode = this.panelsNode.appendChild(new amdaPlotObj.PlotPanelTreeNode({object : panelObject}));

		if (!this.tabObject.get('tree-simplified-view'))

		{

			//Axes node
			this.buildPanelAxesNode(panelObject);

			//Additional objects
			this.buildPanelAdditionalObjectsNode(panelObject);
		}

		//Params node

		this.buildPanelParamsNode(panelObject, paramNodeToSelect);

		return panelNode;
	},
	
	movePanel : function(record,targetNode,position)
	{
		var fromIndex = targetNode.parentNode.indexOf(record);
		var toIndex   = targetNode.parentNode.indexOf(targetNode);
		
		var fromRecord = this.tabObject.panels().getAt(fromIndex);
		if (!fromRecord)
			return false;
		
		switch (position)
		{
			case 'before' :
				this.tabObject.panels().data.removeAt(fromIndex);
				var insertIndex = (fromIndex > toIndex) ? toIndex : toIndex - 1;
				this.tabObject.panels().data.insert(insertIndex, fromRecord);
				this.buildPanelsNode();
				this.getSelectionModel().select(this.panelsNode.getChildAt(insertIndex));
				return true;
			case 'after' :
				this.tabObject.panels().data.removeAt(fromIndex);
				var insertIndex = (fromIndex > toIndex) ? toIndex + 1 : toIndex;
				this.tabObject.panels().data.insert(insertIndex, fromRecord);
				this.buildPanelsNode();
				this.getSelectionModel().select(this.panelsNode.getChildAt(insertIndex));
				return true;
				break;
			default :
				return false;
		}
		
		return true;
	},
	

	moveParam : function(record,targetNode,position)
	{

		if ((record.$className != 'amdaPlotObj.PlotParamTreeNode') || (targetNode == null))

			return false;
		
		var fromIndex = record.parentNode.indexOf(record);
		var toIndex   = targetNode.parentNode.indexOf(targetNode);
		
		var fromPanelObject = null;
 		if (!this.tabObject.get('tree-simplified-view'))
		{
			fromPanelObject = record.parentNode.parentNode.object;
		}
		else
			fromPanelObject = record.parentNode.object;
 		if (fromPanelObject == null)
 			return false;
 		
 		switch (targetNode.$className)
 		{
 		case 'amdaPlotObj.PlotPanelTreeNode' :
 		case 'amdaPlotObj.PlotParamsTreeNode' :
 			var toPanelObject = targetNode.object;
 			if (toPanelObject.get('panel-plot-type') != fromPanelObject.get('panel-plot-type'))
 				return false;
 			if (toPanelObject == fromPanelObject)
 			{
 				//Move param on the same panel
 				fromPanelObject.params().data.removeAt(fromIndex);
				toPanelObject.params().data.add(record.object);
				this.buildPanelParamsNode(toPanelObject, record.object.get('id'));
 			}
 			else
 			{
 				//Move param on another panel
 				var clonedObject = record.object.copy();
 	 			fromPanelObject.params().remove(record.object);
 	 			toPanelObject.set('last-param-id', toPanelObject.get('last-param-id')+1);
 	 			clonedObject.set('id', toPanelObject.get('last-param-id'));
 	 			toPanelObject.params().add(clonedObject);
 	 			this.buildPanelParamsNode(fromPanelObject);
 	 			this.buildPanelParamsNode(toPanelObject, clonedObject.get('id'));
 			}
 			return true;
 		case 'amdaPlotObj.PlotParamTreeNode' :
 			var toPanelObject = null;
 			if (!this.tabObject.get('tree-simplified-view'))
			{
 				toPanelObject = targetNode.parentNode.parentNode.object;
			}
			else
				toPanelObject = targetNode.parentNode.object;
 			targetNode.object;
 			if (toPanelObject.get('panel-plot-type') != fromPanelObject.get('panel-plot-type'))
 				return false;
 			
 			if (toPanelObject == fromPanelObject)
 			{
 				//Move param on the same panel
 				var insertIndex = -1;
 	 			switch (position)
 	 			{
 	 			case 'before' :
 	 				insertIndex = (fromIndex > toIndex) ? toIndex : toIndex - 1;
 	 				break;
 	 			case 'after' :
 	 			default :
 	 				insertIndex = (fromIndex > toIndex) ? toIndex + 1 : toIndex;
 	 				break;
 	 			}
 	 			fromPanelObject.params().data.removeAt(fromIndex);
				toPanelObject.params().data.insert(insertIndex, record.object);
				this.buildPanelParamsNode(toPanelObject, record.object.get('id'));
 			}
 			else
 			{
 				//move param on another panel
 				var insertIndex = -1;
 	 			switch (position)
 	 			{
 	 			case 'before' :
 	 				insertIndex = (toIndex == 0) ? 0: toIndex - 1;
 	 				break;
 	 			case 'after' :
 	 			default :
 	 				insertIndex = toIndex + 1;
 	 				break;
 	 			}
 	 			var clonedObject = record.object.copy();
 	 			fromPanelObject.params().remove(record.object);
 	 			toPanelObject.set('last-param-id', toPanelObject.get('last-param-id')+1);
 	 			clonedObject.set('id', toPanelObject.get('last-param-id'));
 	 			toPanelObject.params().insert(insertIndex, clonedObject);
 	 			this.buildPanelParamsNode(fromPanelObject);
 	 			this.buildPanelParamsNode(toPanelObject, clonedObject.get('id'));
 			}
 			return true;
 		}
 		return false;

	},
	

	onNodeSelect: function(tree, record, index, eOpts) {
		if (index == -1)
			return;

		if (this.plotElementPanel != null)

			this.plotElementPanel.setElement(record.type, record.object, this);

	},
	

	onNodeDeselect: function(tree, record, index, eOpts) {
		if (this.plotElementPanel != null)
			this.plotElementPanel.resetElement();
	},
	

	onCellClick: function(tree, td, cellIndex, record, tr, rowIndex, e, eOpts) {
		if ((cellIndex === 1) && record.get('removable'))
		{

			this.getSelectionModel().deselectAll();

			switch (record.get('type'))
			{
			case 'panel' :
				if (this.tabObject.removePanelById(record.object.get('id')))
					this.buildPanelsNode();
				break;
			case 'param' :
				var panelObject = null;

				if (!this.tabObject.get('tree-simplified-view'))

					panelObject = record.parentNode.parentNode.object;
				else
					panelObject = record.parentNode.object;
				//removeParamById
				if (panelObject.removeParamById(record.object.get('id')))
					this.buildPanelsNode();
				break;

			case 'text-legend' :
				var panelObject = null;

				if (!this.tabObject.get('tree-simplified-view'))

					panelObject = record.parentNode.parentNode.object;
				else
					panelObject = record.parentNode.object;
				if (panelObject.removeTextLegendById(record.object.get('id')))
					this.buildPanelAdditionalObjectsNode(panelObject);
				break;

			case 'constant' :
				var panelObject = null;

				if (!this.tabObject.get('tree-simplified-view'))

					panelObject = record.parentNode.parentNode.object;
				else
					panelObject = record.parentNode.object;
				if (panelObject.removeConstantById(record.object.get('id')))
					this.buildPanelAdditionalObjectsNode(panelObject);
				break;
			case 'text-obj' :
				var panelObject = null;

				if (!this.tabObject.get('tree-simplified-view'))

					panelObject = record.parentNode.parentNode.object;
				else
					panelObject = record.parentNode.object;
				if (panelObject.removeTextObjectById(record.object.get('id')))
					this.buildPanelAdditionalObjectsNode(panelObject);
				break;
			case 'curve' :
				var panelObject = null;

				if (!this.tabObject.get('tree-simplified-view'))

					panelObject = record.parentNode.parentNode.object;
				else
					panelObject = record.parentNode.object;
				if (panelObject.removeCurveById(record.object.get('id')))
					this.buildPanelAdditionalObjectsNode(panelObject);
				break;
			case 'fill' :
				var panelObject = null;

				if (!this.tabObject.get('tree-simplified-view'))

					panelObject = record.parentNode.parentNode.object;
				else
					panelObject = record.parentNode.object;
				if (panelObject.removeFillById(record.object.get('id')))
					this.buildPanelAdditionalObjectsNode(panelObject);
				break;
 			}

		}
	},
	

	onNodeCollapse: function(node) {
		node.setNodeState(0);
	},
	
	onNodeExpand: function(node) {
		node.setNodeState(1);
	},
	

	getSelectedNode: function() {
		var selection = this.getSelectionModel().getSelection();
		if ((selection == null) || (selection.length == 0))
			return null;
		return selection[0];
	},
	

	getSelectedPanelObject: function() {

		var selectedNode = this.getSelectedNode();
		if (selectedNode == null)

			return null;

		var crtNode = selectedNode;
		do {
			if (crtNode.get('type') == 'panel')

				return crtNode.object;

			crtNode = crtNode.parentNode;
		} while(crtNode != null);

		return null;
	},
	
	getSelectedPlotType: function() {
		var crtPanelObject = this.getSelectedPanelObject();
		if (crtPanelObject == null)
			return 'none';
		
		return crtPanelObject.get('panel-plot-type');

	},
	
	isValidToDrop : function(record,targetNode,position)
	{
		switch (record.$className)
        {
        	case 'amdaModel.LocalParamNode'   :
    	 	case 'amdaModel.RemoteParamNode'  :
    	 	case 'amdaModel.RemoteSimuParamNode'  :    
    	 		return record.get('isParameter') && ! record.get('disable');
    	 	case 'amdaModel.AliasNode'        :
    	 	case 'amdaModel.DerivedParamNode' :
    	 	case 'amdaModel.MyDataParamNode'  :
    	 		return record.isLeaf(); 
    	 	case 'amdaPlotObj.PlotParamTreeNode' :

    	 		var fromPanelObject = null;
    	 		if (!this.tabObject.get('tree-simplified-view'))
				{
					fromPanelObject = record.parentNode.parentNode.object;
				}
				else
					fromPanelObject = record.parentNode.object;

    	 		if ((fromPanelObject == null) || (targetNode == null))

    	 			return false;
    	 		
    	 		var toPanelObject = null;
    	 		switch (targetNode.$className)
    	 		{
    	 		case 'amdaPlotObj.PlotPanelTreeNode' :
    	 		case 'amdaPlotObj.PlotParamsTreeNode' :
    	 			toPanelObject = targetNode.object;
    	 			break;
    	 		case 'amdaPlotObj.PlotParamTreeNode' :
    	 			if (!this.tabObject.get('tree-simplified-view'))
    				{
    	 				toPanelObject = targetNode.parentNode.parentNode.object;
    				}
    				else
    					toPanelObject = targetNode.parentNode.object;
    	 			break;
    	 		}
    	 		if (toPanelObject == null)
    	 			return false;
    	 		return (fromPanelObject.get('panel-plot-type') == toPanelObject.get('panel-plot-type'));

    	 	case 'amdaPlotObj.PlotPanelTreeNode' :	
    	 		switch (position)
    	 		{
    	 			case 'append' :
    	 				return false;
    	 			case 'before' :
    	 				return (targetNode.$className == 'amdaPlotObj.PlotPanelTreeNode');
    	 			case 'after'  :
    	 				return ((targetNode.$className == 'amdaPlotObj.PlotPanelTreeNode') && targetNode.isLast());
    	 		}
        }
		return false;
	},
	

	dropParamToCreate : function(targetNode, position, paramId, paramComponents, isVector, plotOnly)

	{
		var panelObject = null;
		if (targetNode == null)
		{
			//create new panel
			panelObject = this.tabObject.createNewPanel();

		}
		else
		{
			switch (targetNode.$className)
	        {
			case 'amdaPlotObj.PlotParamsTreeNode' :
			case 'amdaPlotObj.PlotPanelTreeNode' :
			case 'amdaPlotObj.PlotAxesTreeNode' :
				panelObject = targetNode.object;
				break;
			case 'amdaPlotObj.PlotTimeAxisTreeNode' :
			case 'amdaPlotObj.PlotEpochAxisTreeNode' :
			case 'amdaPlotObj.PlotXAxisTreeNode' :
			case 'amdaPlotObj.PlotYLeftAxisTreeNode' :
			case 'amdaPlotObj.PlotYRightAxisTreeNode' :
			case 'amdaPlotObj.PlotColorAxisTreeNode' :
			case 'amdaPlotObj.PlotParamTreeNode' :
				panelObject = targetNode.parentNode.object;
				break;
			default:
				//create new panel
				panelObject = this.tabObject.createNewPanel();

	        }
		}

		//Create param object

		var me = this;

		panelObject.createNewParam(paramId, paramComponents, isVector, plotOnly, function (newParamObject) {

			//Rebuild params node

			me.buildPanelsNode(newParamObject.getId());
			//BRE newParamObject

		});

	},
	
	dropRecord : function(record,targetNode,position)
    {
    	var selModel = this.getSelectionModel();
		
    	//select the target node if defined
    	if (targetNode)
    		selModel.select(targetNode);
    	else
    		selModel.deselectAll();
    	
    	switch (record.$className)
    	{
    	 	case 'amdaModel.LocalParamNode'   :	  
    	 	case 'amdaModel.RemoteParamNode'  :
    	 	case 'amdaModel.RemoteSimuParamNode'  :    
    	 		if (!record.get('isParameter') || record.get('disable'))
    	 			return false;
                        

    	 		if (record.get('alias') != "" )
                	this.dropParamToCreate(targetNode, position, "#"+record.get('alias'));
                else {

						var isVector = record.get('iconCls') == 'icon-vector';

                	var component_info = record.get('component_info');
                	var param_id = record.get('id');

						var plot_only = record.get('notyet');

                	var components = null;
                	if (component_info && component_info.parentId) {
                		//It's a component
                		param_id = component_info.parentId;
                		components = [];
                		if (component_info.index1)
                			components['index1'] = component_info.index1;
                		if (component_info.index2)
                			components['index2'] = component_info.index2;
                	}

                	this.dropParamToCreate(targetNode, position, param_id, components, isVector, plot_only);

                }

                return true;
    	 	case 'amdaModel.AliasNode'        :
    	 		if (!record.isLeaf())
    	 			return false;
    	 		this.dropParamToCreate(targetNode, position, "#"+record.get('text'));
    	 		return true;
    	 	case 'amdaModel.DerivedParamNode' :
    	 		if (!record.isLeaf())
				    return false;
    	 		this.dropParamToCreate(targetNode, position, "ws_"+record.get('text'));
			    return true;
			case 'amdaModel.MyDataParamNode' :
				if (!record.isLeaf())
				    return false;
				this.dropParamToCreate(targetNode, position, "wsd_"+record.get('text'));
			    return true;
		 	case 'amdaPlotObj.PlotParamTreeNode' :
			    return this.moveParam(record,targetNode,position);
		 	case 'amdaPlotObj.PlotPanelTreeNode' :
		 		return this.movePanel(record,targetNode,position);
		    default :
			    return false;
    	}
    	return false;
	},
	
	getDragAndDropPluginConfig : function() {
		var me = this;
		
		return {
			ptype:'treeviewdragdrop',
			ddGroup:'explorerTree',
            enableDrag:true,
            enableDrop:true,
            appendOnly : false,
            allowContainerDrops : true,
            containerScroll : true,
            isValidDropPoint : function (node, position, dragZone, e, data) 
            {       
            	if (!node || !data.item) {
            		return false;
            	}           	    
                
                var view = this.view,
                targetNode = view.getRecord(node),
                draggedRecords = data.records,
                dataLength = draggedRecords.length,
                ln = draggedRecords.length,
                i, record;        		
                // No drop position, or dragged records: invalid drop point
                if (!(targetNode && position && dataLength)) {
                    return false;
                }
                             
                // If the targetNode is within the folder we are dragging
                for (i = 0; i < ln; i++) {
                    record = draggedRecords[i];
                    if (record.isNode && record.contains(targetNode)) {
                        return false;
                    }
                }
                
                // Respect the allowDrop field on Tree nodes
                if (position === 'append' && targetNode.get('allowDrop') === false) {
                    return false;
                }
                
                // If the target record is in the dragged dataset, then invalid drop
                if (Ext.Array.contains(draggedRecords, targetNode)) {
                     return false;
                }
                         
                if (dataLength > 1)
                	return false;
                var draggedRecord = draggedRecords[0];
                
                return me.isValidToDrop(draggedRecord,targetNode,position);
            },
            onPlotContainerDrop : function(dd, e, data){
            	if (data.records.length != 1)
            		return false;
            	return me.dropRecord(data.records[0],null,null);
            },
            onPlotNodeDrop : function(n, dd, e, data){
            	if (data.records.length != 1)
            		return false;
            	return me.dropRecord(data.records[0],this.view.getRecord(n),this.getPosition(e,n));
            }, 
            onPlotContainerOver : function(dd, e, data) {
            	if (data.records.length != 1)
            		return false;
            	var draggedRecord = data.records[0];
                return me.isValidToDrop(draggedRecord,null,'append') ? this.dropAllowed : this.dropNotAllowed;
            },
            onViewRender : function(view) {
				var me = this;

      			if (me.enableDrag) {
          			me.dragZone = Ext.create('Ext.tree.ViewDragZone', {
              			view: view,
              			ddGroup: me.dragGroup || me.ddGroup,
              			dragText: me.dragText,
              			repairHighlightColor: me.nodeHighlightColor,
              			repairHighlight: me.nodeHighlightOnRepair
          			});
      			}

      			if (me.enableDrop) {
          			me.dropZone = Ext.create('Ext.tree.ViewDropZone', {
              			view: view,
              			ddGroup: me.dropGroup || me.ddGroup,
              			allowContainerDrops: me.allowContainerDrops,
              			appendOnly: me.appendOnly,
              			allowParentInserts: me.allowParentInserts,
              			expandDelay: me.expandDelay,
              			dropHighlightColor: me.nodeHighlightColor,
              			dropHighlight: me.nodeHighlightOnDrop,
              			isValidDropPoint : me.isValidDropPoint,
              			onContainerDrop : me.onPlotContainerDrop,
              			onNodeDrop      : me.onPlotNodeDrop,
              			onContainerOver : me.onPlotContainerOver
          			});
      			}
			}
        }
	},
	

	updateLinkedToMultiPlotMode : function() {
		this.plotTabContent.updateLinkedToMultiPlotMode(this.tabObject.get('multi-plot-linked'));
	},
	

	init : function(config) {
		var me = this;
		
		this.plotElementPanel = config.plotElementPanel;
		
		var store = Ext.create('Ext.data.TreeStore', {
			root: {
				expanded: true
		    }
		});
		
		this.plotElementPanel = config.plotElementPanel;
		

		this.simplifiedViewCombo = Ext.create('Ext.form.field.Checkbox', {
			xtype: 'checkbox',
			boxLabel: 'Simplified View',
			listeners: {
				change: function(combo, newValue, oldValue, eOpts) {
					if (this.tabObject)
			        	this.tabObject.set('tree-simplified-view', newValue);
					if (newValue != oldValue)
						this.buildTree(this.tabObject);
				},
			    scope: this
			}
		});
		
		this.linkToMultiPlotCombo = Ext.create('Ext.form.field.Checkbox', {
			xtype: 'checkbox',
			boxLabel: 'Link to MultiPlot',
			listeners: {
				change: function(combo, newValue, oldValue, eOpts) {
					if (this.tabObject)
					{
			        	this.tabObject.set('multi-plot-linked', newValue);
			        	this.updateLinkedToMultiPlotMode();
					}
				},
			    scope: this
			}
		});
		

		var myConf = {
				store: store,
				rootVisible: false,

				hideHeaders: true,
				viewConfig:{

	                plugins: this.getDragAndDropPluginConfig(),
	                preserveScrollOnRefresh: true

	            },

				listeners: {
			        select: me.onNodeSelect,

			        deselect: me.onNodeDeselect,

			        cellclick: me.onCellClick,

			        itemcollapse: me.onNodeCollapse,
			        itemexpand: me.onNodeExpand,

			        scope: me

			    },
			    columns: [
			              {
			            	  xtype: 'treecolumn',
			                  text: 'Plot Element',
			                  flex: 1,
			                  dataIndex: 'text',
			                  renderer: function (val, meta, rec) {
			                	  var fullVal = val;
			                	  if (rec.getAdditionalText)
			                	    fullVal += rec.getAdditionalText();
			                	  return fullVal;
			                  }

			              },
			              {
			            	  menuDisabled: true, 
			            	  align: 'center',
			            	  width: 24, 
			            	  renderer: function(v,m,record){
			            		  if (record.get('removable'))
			            			  return'<div class="icon-small-remover" style="width: 16px; height: 16px; vertical-align: middle;"></div>';
			            		  else
			            			  return '';
			            	  }

			              }
			    ],
			    tbar: [
			           {
			        	   xtype: 'button',
			        	   text: 'Add panel',

			        	   iconCls: 'icon-add',

			        	   handler: function() {

			        		   var newPabelNode = this.addPanelNode(this.tabObject.createNewPanel());
			        		   this.getSelectionModel().select(newPabelNode);

			        	   },
			        	   scope: this

			           },
			           '->',

			           this.linkToMultiPlotCombo,
			           ' ',
			           this.simplifiedViewCombo

			    ]

		};
		
		Ext.apply (this , Ext.apply (arguments, myConf));
	}
});