The setDynamicLoad method tells the tree that we want to know when the user clicks on one of its nodes to expand it, and it tells the tree what function to call ( makeMoreNodes , which we'll be writing shortly) when those clicks happen:

4 Responses to YUI TreeView with Ruby on Rails. Sachin says: 4 Jun 2008 at 05:07. – var root = page_tree.getRoot();. –. How can you pass javascript variable to a ruby function?? As I am getting a nil at the function side.. Wyatt says: 6 Jun 2008 at 13:03. @Sachin. In < % generate_page_nodes(@root) %>, @root is the root node of your acts_as_tree model. Joe says: 30 Apr 2009 at 15:08. I'm getting problems running that generate_page_nodes method in the javascript block

The problem is that clicking on the plus sign fires the expand event, and I also need it to make the Ajax call. By definition the clickEvent will also expand the node, which will trigger the expand event subscription

TreeView("myTree"); // Recurse over the tree data to build nodes. // Expand the second level of files & folders, but keep the rest hidden. function buildNodes(parentNode, treeData, parentPath, expanded) { for (var i=0; i<treeData.length

tree.subscribe('expand', function() { return false; }); //Render :) tree.render(); //Loop through all the nodes and add an onClick event for (var i in tree._nodes) { YAHOO.util.Event.addListener(YAHOO.util.Dom.getFirstChild(YAHOO.util

This will get me the JSON for this part of the tree which will magically be inserted under the node I expanded. In actuality, it will replace the current children I have from my JSON (the fieldid row above). Pretty cool. ... We have chosen not to use Dojo for some new projects because of the sordid history of the tree widget (and used YUI's instead, which is great). This is a widget that many modern systems require, and it should really be given more attention

Hello all, when I expand the last node of my tree (SonyDADC) I can't collapse it, or expand the first node (Cardemotion). Here is my tree: http://www.stream.cd/extjtest/ This is my two-trees.js /* ... licensing@extjs.com * * http://extjs. com/license */ var TreeTest = function(){ // shorthand var Tree = Ext.tree; Tree.init = function() { // yui-ext tree var tree = new Tree.TreePanel({ el:'tree', animate:true, autoScroll:true, rootVisible:false, loader: new Tree

new Tree.TreeSorter(tree2, {folderSort:true}); // add the root node var root2 = new Tree.AsyncTreeNode({ text: 'Restore Files', draggable:false, id:'yui' }); tree2.setRootNode(root2); tree2.render('tree2'); root2.expand(false

The second problem is that when you click a tree node, yui automatically tries to load in it's children, which is not needed since we know it is a leaf node. To fix this problem you simply need to override the expand method with an

Specifically, the client wanted to be able to expand folders and click on links to documents in an interface similar to windows explorer (The filesystem browser they were familiar with). ... One of the things that made YUI's tree widget a good fit, is that you can set a dynamic load property. This means when a user expands a node, the browser will make an ajax call to fetch the children and render the child nodes appropriately, which would will reduce the initial page

Currently the form for adding a post to a book hierarchy becomes unworkable for sites with lots of book nodes (e.g. drupal.org). We need something more innovative than a simple dropdown for this new release. But what? ... Something like the Yui tree sorting would be ideal, but would involve making the YUI JavaScript library compatible with Drupal (I think the Ext.js jQuery extension does this) and forcing users to download a separate copy of it to drop in their

draggable:false, // disable root node dragging id:'companies' }); tree.setRootNode(root); // render the tree tree.render(); root.expand(false, /*no anim*/ false); //------------------------------------------------------------- // YUI

The first is a small extension to YUI DataTable for opening/closing nodes in the tree. (This is done by augmenting DataTable in order to allow it to work transparently with existing extensions to DataTable, most notably ScrollingDataTable. ..... The one remaining thing I'm having trouble with is that now the toggle to expand a top level node only works when the table is in the original sort order. Example: http://web.me.com/jeremiah.atwood/sort_example/sort_example.html

之前简单介绍过TreeView的使用，现在来仔细分析一下YUI TreeView的结构，Tree相关的类如下： 我们分成3部分看，第一部分是前面几个以Node结尾的类，这些类代表是树上的节点，其中最顶层的是Node，这个类是其他几种Node的父类。Node中有节点所具有的所有 ... Node中有节点所具有的所有属性和方法，比如children，parent，depth，expand()，collapse()等等。 第二部分是TreeView这个类，这个类就像是一棵树的骨架，他有根有树干有树枝，可以把上面介绍的Node节点挂在Treeview上，Treeview会统一管理记录这些节点。

I was trying to build a tree structure similar to the Role Hierarchy Display wherein we can expand/collapse each node. Is this feasbile with YUI tree control on a VF page?? Thanks,. Cool_D. Report Inappropriate Content

The XUL tree widget, jsTree with jQuery, YUI, Dojo, some code editors… None of them were exactly what I wanted so there was going to be a bunch of work to shoe-horn them in. Also, they carried around a lot of cross-platform baggage I wasn't ... When you say it “slowed down the page rendering by a factor of [x]“, did you mean the content page or the tree representation? I know it's heavy. It does a lot of seemingly extraneous tree walking to expand and collapse nodes

tree.setNodesProperty('propagateHighlightUp',true); me.parent.expand(); }. But I get an error when attempting to call the function. Error: setNodesProperty is not a function. Any help would be greatly appreciated :?: . ... First of all, using onXxxx event attributes is never a good idea, that is why you have events like clickEvent that already resolve the tree node for you. Also, this saves you from being forced to put an anchor element in the node, it will fire no matter

If you want to display a branch at a time as they get expanded, using the dynamic load example is a good basis. However, if what you want is to read the data and display it all at once, then it is not, a better example of the alternatives you ... var leafNode = node; while (!leafNode.isRoot()) { path = leafNode.label + "/" + path; leafNode = leafNode.parent; } //var nodelabel = encodeURI(path); var sUrl = "http://localhost/yui/examples/tree/payment.php"; var callback = {

接着上一次的介绍，这次主要说一下如何扩展YUI的tree。使用YUI的Tree需要引入两个文件，一个是treeview.css，一个是treeview.js，从这个文件结构上来看不发现，如果需要扩展一棵树，无非就是从显示(css)和控制(Js)上来实现。首先分析一下css文件在Js是如何被 引用的。 ... getToggleLink()这个方法，这个方法的实现在Node.js里面，查看源码，可以发现，他最后是调用了节点的expand()和collapse()方法。也就是点击它，要么是把节点展开，要么是把节点合拢。 sb[sb.length] = ' onclick="return ' + getNode + '

Dynamic loading is a mechanism whereby the children of a node are only loaded when the user expands that node. This allows you, for example, to use YUI's Connection Manager to make XHR calls as TreeView nodes are expanded,

You will notice that when you set isLeaf to true, there will be no toggle sign drawn, already signaling the visitor that the node cannot be further expanded. The other possible way would be to leave the [+] toggle sign and only after it