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+ <pre class="prettyprint lang-js"><span id='Ext-tree-ViewDropZone'>/**
+</span> * @class Ext.tree.ViewDropZone
+ * @extends Ext.view.DropZone
+ * @private
+ */
+Ext.define('Ext.tree.ViewDropZone', {
+ extend: 'Ext.view.DropZone',
+
+<span id='Ext-tree-ViewDropZone-cfg-allowParentInsert'> /**
+</span> * @cfg {Boolean} allowParentInsert
+ * Allow inserting a dragged node between an expanded parent node and its first child that will become a
+ * sibling of the parent when dropped (defaults to false)
+ */
+ allowParentInserts: false,
+
+<span id='Ext-tree-ViewDropZone-cfg-allowContainerDrop'> /**
+</span> * @cfg {String} allowContainerDrop
+ * True if drops on the tree container (outside of a specific tree node) are allowed (defaults to false)
+ */
+ allowContainerDrops: false,
+
+<span id='Ext-tree-ViewDropZone-cfg-appendOnly'> /**
+</span> * @cfg {String} appendOnly
+ * True if the tree should only allow append drops (use for trees which are sorted, defaults to false)
+ */
+ appendOnly: false,
+
+<span id='Ext-tree-ViewDropZone-cfg-expandDelay'> /**
+</span> * @cfg {String} expandDelay
+ * The delay in milliseconds to wait before expanding a target tree node while dragging a droppable node
+ * over the target (defaults to 500)
+ */
+ expandDelay : 500,
+
+ indicatorCls: 'x-tree-ddindicator',
+
+ // private
+ expandNode : function(node) {
+ var view = this.view;
+ if (!node.isLeaf() && !node.isExpanded()) {
+ view.expand(node);
+ this.expandProcId = false;
+ }
+ },
+
+ // private
+ queueExpand : function(node) {
+ this.expandProcId = Ext.Function.defer(this.expandNode, this.expandDelay, this, [node]);
+ },
+
+ // private
+ cancelExpand : function() {
+ if (this.expandProcId) {
+ clearTimeout(this.expandProcId);
+ this.expandProcId = false;
+ }
+ },
+
+ getPosition: function(e, node) {
+ var view = this.view,
+ record = view.getRecord(node),
+ y = e.getPageY(),
+ noAppend = record.isLeaf(),
+ noBelow = false,
+ region = Ext.fly(node).getRegion(),
+ fragment;
+
+ // If we are dragging on top of the root node of the tree, we always want to append.
+ if (record.isRoot()) {
+ return 'append';
+ }
+
+ // Return 'append' if the node we are dragging on top of is not a leaf else return false.
+ if (this.appendOnly) {
+ return noAppend ? false : 'append';
+ }
+
+ if (!this.allowParentInsert) {
+ noBelow = record.hasChildNodes() && record.isExpanded();
+ }
+
+ fragment = (region.bottom - region.top) / (noAppend ? 2 : 3);
+ if (y >= region.top && y < (region.top + fragment)) {
+ return 'before';
+ }
+ else if (!noBelow && (noAppend || (y >= (region.bottom - fragment) && y <= region.bottom))) {
+ return 'after';
+ }
+ else {
+ return 'append';
+ }
+ },
+
+ 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;
+ }
+ else if (position != 'append' && targetNode.parentNode.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;
+ }
+
+ // @TODO: fire some event to notify that there is a valid drop possible for the node you're dragging
+ // Yes: this.fireViewEvent(blah....) fires an event through the owning View.
+ return true;
+ },
+
+ onNodeOver : function(node, dragZone, e, data) {
+ var position = this.getPosition(e, node),
+ returnCls = this.dropNotAllowed,
+ view = this.view,
+ targetNode = view.getRecord(node),
+ indicator = this.getIndicator(),
+ indicatorX = 0,
+ indicatorY = 0;
+
+ // auto node expand check
+ this.cancelExpand();
+ if (position == 'append' && !this.expandProcId && !Ext.Array.contains(data.records, targetNode) && !targetNode.isLeaf() && !targetNode.isExpanded()) {
+ this.queueExpand(targetNode);
+ }
+
+ if (this.isValidDropPoint(node, position, dragZone, e, data)) {
+ this.valid = true;
+ this.currentPosition = position;
+ this.overRecord = targetNode;
+
+ indicator.setWidth(Ext.fly(node).getWidth());
+ indicatorY = Ext.fly(node).getY() - Ext.fly(view.el).getY() - 1;
+
+ if (position == 'before') {
+ returnCls = targetNode.isFirst() ? Ext.baseCSSPrefix + 'tree-drop-ok-above' : Ext.baseCSSPrefix + 'tree-drop-ok-between';
+ indicator.showAt(0, indicatorY);
+ indicator.toFront();
+ }
+ else if (position == 'after') {
+ returnCls = targetNode.isLast() ? Ext.baseCSSPrefix + 'tree-drop-ok-below' : Ext.baseCSSPrefix + 'tree-drop-ok-between';
+ indicatorY += Ext.fly(node).getHeight();
+ indicator.showAt(0, indicatorY);
+ indicator.toFront();
+ }
+ else {
+ returnCls = Ext.baseCSSPrefix + 'tree-drop-ok-append';
+ // @TODO: set a class on the parent folder node to be able to style it
+ indicator.hide();
+ }
+ }
+ else {
+ this.valid = false;
+ }
+
+ this.currentCls = returnCls;
+ return returnCls;
+ },
+
+ onContainerOver : function(dd, e, data) {
+ return e.getTarget('.' + this.indicatorCls) ? this.currentCls : this.dropNotAllowed;
+ },
+
+ notifyOut: function() {
+ this.callParent(arguments);
+ this.cancelExpand();
+ },
+
+ handleNodeDrop : function(data, targetNode, position) {
+ var me = this,
+ view = me.view,
+ parentNode = targetNode.parentNode,
+ store = view.getStore(),
+ recordDomNodes = [],
+ records, i, len,
+ insertionMethod, argList,
+ needTargetExpand,
+ transferData,
+ processDrop;
+
+ // If the copy flag is set, create a copy of the Models with the same IDs
+ if (data.copy) {
+ records = data.records;
+ data.records = [];
+ for (i = 0, len = records.length; i < len; i++) {
+ data.records.push(Ext.apply({}, records[i].data));
+ }
+ }
+
+ // Cancel any pending expand operation
+ me.cancelExpand();
+
+ // Grab a reference to the correct node insertion method.
+ // Create an arg list array intended for the apply method of the
+ // chosen node insertion method.
+ // Ensure the target object for the method is referenced by 'targetNode'
+ if (position == 'before') {
+ insertionMethod = parentNode.insertBefore;
+ argList = [null, targetNode];
+ targetNode = parentNode;
+ }
+ else if (position == 'after') {
+ if (targetNode.nextSibling) {
+ insertionMethod = parentNode.insertBefore;
+ argList = [null, targetNode.nextSibling];
+ }
+ else {
+ insertionMethod = parentNode.appendChild;
+ argList = [null];
+ }
+ targetNode = parentNode;
+ }
+ else {
+ if (!targetNode.isExpanded()) {
+ needTargetExpand = true;
+ }
+ insertionMethod = targetNode.appendChild;
+ argList = [null];
+ }
+
+ // A function to transfer the data into the destination tree
+ transferData = function() {
+ var node;
+ for (i = 0, len = data.records.length; i < len; i++) {
+ argList[0] = data.records[i];
+ node = insertionMethod.apply(targetNode, argList);
+
+ if (Ext.enableFx && me.dropHighlight) {
+ recordDomNodes.push(view.getNode(node));
+ }
+ }
+
+ // Kick off highlights after everything's been inserted, so they are
+ // more in sync without insertion/render overhead.
+ if (Ext.enableFx && me.dropHighlight) {
+ //FIXME: the check for n.firstChild is not a great solution here. Ideally the line should simply read
+ //Ext.fly(n.firstChild) but this yields errors in IE6 and 7. See ticket EXTJSIV-1705 for more details
+ Ext.Array.forEach(recordDomNodes, function(n) {
+ Ext.fly(n.firstChild ? n.firstChild : n).highlight(me.dropHighlightColor);
+ });
+ }
+ };
+
+ // If dropping right on an unexpanded node, transfer the data after it is expanded.
+ if (needTargetExpand) {
+ targetNode.expand(false, transferData);
+ }
+ // Otherwise, call the data transfer function immediately
+ else {
+ transferData();
+ }
+ }
+});</pre>
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