Default presentation for the TreeView Control.
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* Douglas Crockford's JSON parsing and stringifying methods: In the JSON Utility, Douglas Crockford's JSON parsing and stringifying methods are adapted from work published at JSON.org. The adapted work is in the public domain.
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>Default TreeView</title>
<style type="text/css">
/*margin and padding on body element
can introduce errors in determining
element position and are not recommended;
we turn them off as a foundation for YUI
CSS treatments. */
body {
margin:0;
padding:0;
}
</style>
<link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/fonts/fonts-min.css" />
<link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/treeview/assets/skins/sam/treeview.css" />
<script type="text/javascript" src="yui_2.7.0b-lib/yahoo-dom-event/yahoo-dom-event.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/treeview/treeview-min.js"></script>
<!--begin custom header content for this example-->
<style>
#treeDiv1 {background: #fff; padding:1em;}
</style>
<!--end custom header content for this example-->
</head>
<body class=" yui-skin-sam">
<h1>Default TreeView</h1>
<div class="exampleIntro">
<p>In this simple example you see the default presentation for the <a href="http://developer.yahoo.com/yui/treeview/">TreeView Control</a>. Click on labels or on the expand/collapse icons for each node to interact with the TreeView Control.</p>
</div>
<!--BEGIN SOURCE CODE FOR EXAMPLE -->
<div id="treeDiv1"></div>
<script type="text/javascript">
//global variable to allow console inspection of tree:
var tree;
//anonymous function wraps the remainder of the logic:
(function() {
//function to initialize the tree:
function treeInit() {
buildRandomTextNodeTree();
}
//Function creates the tree and
//builds between 3 and 7 children of the root node:
function buildRandomTextNodeTree() {
//instantiate the tree:
tree = new YAHOO.widget.TreeView("treeDiv1");
for (var i = 0; i < Math.floor((Math.random()*4) + 3); i++) {
var tmpNode = new YAHOO.widget.TextNode("label-" + i, tree.getRoot(), false);
// tmpNode.collapse();
// tmpNode.expand();
// buildRandomTextBranch(tmpNode);
buildLargeBranch(tmpNode);
}
// Expand and collapse happen prior to the actual expand/collapse,
// and can be used to cancel the operation
tree.subscribe("expand", function(node) {
YAHOO.log(node.index + " was expanded", "info", "example");
// return false; // return false to cancel the expand
});
tree.subscribe("collapse", function(node) {
YAHOO.log(node.index + " was collapsed", "info", "example");
});
// Trees with TextNodes will fire an event for when the label is clicked:
tree.subscribe("labelClick", function(node) {
YAHOO.log(node.index + " label was clicked", "info", "example");
});
//The tree is not created in the DOM until this method is called:
tree.draw();
}
//function builds 10 children for the node you pass in:
function buildLargeBranch(node) {
if (node.depth < 10) {
YAHOO.log("buildRandomTextBranch: " + node.index, "info", "example");
for ( var i = 0; i < 10; i++ ) {
new YAHOO.widget.TextNode(node.label + "-" + i, node, false);
}
}
}
//Add an onDOMReady handler to build the tree when the document is ready
YAHOO.util.Event.onDOMReady(treeInit);
})();
</script>
<!--END SOURCE CODE FOR EXAMPLE -->
</body>
</html>
<!-- presentbright.corp.yahoo.com uncompressed/chunked Thu Feb 19 10:53:19 PST 2009 -->
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