gistfile1.txt

appendChild : function(node, suppressEvents, commit) {
                    var me = this,
                        i, ln,
                        index,
                        oldParent,
                        previousSibling,
                        childInfo = {
                            isLast: true,
                            parentId: me.getId(),
                            depth: (me.data.depth||0) + 1
                        };

                    // if passed an array do them one by one
                    if (Ext.isArray(node)) {
                        // suspend auto syncing while we append all the nodes
                        me.callStore('suspendAutoSync');
                        for (i = 0, ln = node.length - 1; i < ln; i++) {
                            me.appendChild(node[i], suppressEvents, commit);
                        }
                        // resume auto syncing before we append the last node
                        me.callStore('resumeAutoSync');
                        me.appendChild(node[ln], suppressEvents, commit);
                    } else {
                        // Make sure it is a record
                        node = me.createNode(node);

                        if (suppressEvents !== true && me.fireEventArgs("beforeappend", [me, node]) === false) {
                            return false;
                        }

                        index = me.childNodes.length;
                        oldParent = node.parentNode;

                        // it's a move, make sure we move it cleanly
                        if (oldParent) {
                            if (suppressEvents !== true && node.fireEventArgs("beforemove", [node, oldParent, me, index]) === false) {
                                return false;
                            }
                            oldParent.removeChild(node, false, false, true);
                        }

                        // Coalesce all layouts caused by node append
                        Ext.suspendLayouts();

                        index = me.childNodes.length;
                        if (index === 0) {
                            me.setFirstChild(node);
                        }

                        me.childNodes[index] = node;
                        node.parentNode = me;
                        node.nextSibling = null;

                        me.setLastChild(node);

                        previousSibling = me.childNodes[index - 1];
                        if (previousSibling) {
                            node.previousSibling = previousSibling;
                            previousSibling.nextSibling = node;
                            previousSibling.updateInfo(commit, {
                                isLast: false
                            });
                            previousSibling.triggerUIUpdate();
                        } else {
                            node.previousSibling = null;
                        }

                        // Update the new child's info passing in info we already know
                        childInfo.isFirst = index === 0;
                        childInfo.index = index;
                        node.updateInfo(commit, childInfo);

                        // As soon as we append a child to this node, we are loaded
                        if (!me.isLoaded()) {
                            me.set('loaded', true);
                        } else if (me.childNodes.length === 1) {
                            me.triggerUIUpdate();
                        }

                        // Ensure connectors are correct by updating the UI on all intervening nodes (descendants) between last sibling and new node.
                        if (index && me.childNodes[index - 1].isExpanded()) {
                            me.childNodes[index - 1].cascadeBy(me.triggerUIUpdate);
                        }

                        if(!node.isLeaf() && node.phantom) {
                            node.set('loaded', true);
                        }

                        // Flush layouts caused by updating of the UI
                        Ext.resumeLayouts(true);

                        if (suppressEvents !== true) {
                            me.fireEventArgs("append", [me, node, index]);

                            if (oldParent) {
                                node.fireEventArgs("move", [node, oldParent, me, index]);
                            }
                        }

                        return node;
                    }
                },