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Alchemy
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
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"http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=utf-8">
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<title>Example: Adding A Context Menu To A TreeView (YUI Library)</title>
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<!-- Standard reset and fonts -->
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<link rel="stylesheet" type="text/css" href="../../build/reset/reset.css">
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<link rel="stylesheet" type="text/css" href="../../build/fonts/fonts.css">
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<!-- CSS for TreeView -->
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<link rel="stylesheet" type="text/css" href="../../build/treeview/assets/skins/sam/treeview.css">
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<!-- CSS for Menu -->
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<link rel="stylesheet" type="text/css" href="../../build/menu/assets/skins/sam/menu.css">
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<!-- Page-specific styles -->
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<style type="text/css">
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h1 {
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font-weight: bold;
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margin: 0 0 1em 0;
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}
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body {
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padding: 1em;
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}
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p, ul {
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margin: 1em 0;
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}
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p em,
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#operainstructions li em {
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font-weight: bold;
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}
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#operainstructions {
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list-style-type: square;
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margin-left: 2em;
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}
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</style>
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<!-- Dependency source files -->
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<script type="text/javascript" src="../../build/yahoo-dom-event/yahoo-dom-event.js"></script>
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<script type="text/javascript" src="../../build/container/container_core.js"></script>
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<script type="text/javascript" src="../../build/treeview/treeview.js"></script>
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<!-- Menu source file -->
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<script type="text/javascript" src="../../build/menu/menu.js"></script>
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<!-- Page-specific script -->
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<script type="text/javascript">
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/*
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Initialize the TreeView instance when the "mytreeview" <div>
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is ready to be scripted.
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*/
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YAHOO.util.Event.onAvailable("mytreeview", function () {
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// Creates a TextNode instance and appends it to the TreeView
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function buildRandomTextBranch(p_oNode) {
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var oTextNode,
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i;
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if (p_oNode.depth < 6) {
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for (i = 0; i < Math.floor(Math.random() * 4); i++) {
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oTextNode = new YAHOO.widget.TextNode(p_oNode.label + "-" + i, p_oNode, false);
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buildRandomTextBranch(oTextNode);
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}
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}
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}
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// Create a TreeView instance
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var oTreeView = new YAHOO.widget.TreeView("mytreeview");
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var n, oTextNode;
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for (n = 0; n < Math.floor((Math.random()*4) + 3); n++) {
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oTextNode = new YAHOO.widget.TextNode("label-" + n, oTreeView.getRoot(), false);
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/*
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Add the TextNode instance to the map, using its
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HTML id as the key.
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*/
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buildRandomTextBranch(oTextNode);
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}
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oTreeView.draw();
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/*
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The YAHOO.widget.TextNode instance whose "contextmenu"
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DOM event triggered the display of the
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ContextMenu instance.
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*/
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var oCurrentTextNode = null;
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/*
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Adds a new TextNode as a child of the TextNode instance
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that was the target of the "contextmenu" event that
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triggered the display of the ContextMenu instance.
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*/
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function addNode() {
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var sLabel = window.prompt("Enter a label for the new node: ", ""),
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oChildNode;
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if (sLabel && sLabel.length > 0) {
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oChildNode = new YAHOO.widget.TextNode(sLabel, oCurrentTextNode, false);
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oCurrentTextNode.refresh();
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oCurrentTextNode.expand();
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}
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}
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/*
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Edits the label of the TextNode that was the target of the
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"contextmenu" event that triggered the display of the
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ContextMenu instance.
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*/
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function editNodeLabel() {
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var sLabel = window.prompt("Enter a new label for this node: ", oCurrentTextNode.getLabelEl().innerHTML);
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if (sLabel && sLabel.length > 0) {
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oCurrentTextNode.getLabelEl().innerHTML = sLabel;
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}
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}
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/*
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Deletes the TextNode that was the target of the "contextmenu"
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event that triggered the display of the ContextMenu instance.
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*/
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function deleteNode() {
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oTreeView.removeNode(oCurrentTextNode);
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oTreeView.draw();
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}
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/*
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"contextmenu" event handler for the element(s) that
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triggered the display of the ContextMenu instance - used
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to set a reference to the TextNode instance that triggered
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the display of the ContextMenu instance.
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*/
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function onTriggerContextMenu(p_oEvent) {
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var oTarget = this.contextEventTarget;
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/*
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Get the TextNode instance that that triggered the
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display of the ContextMenu instance.
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*/
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oCurrentTextNode = oTreeView.getNodeByElement(oTarget);
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if (!oCurrentTextNode) {
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// Cancel the display of the ContextMenu instance.
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this.cancel();
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}
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}
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/*
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Instantiate a ContextMenu: The first argument passed to the constructor
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is the id for the Menu element to be created, the second is an
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object literal of configuration properties.
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*/
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var oContextMenu = new YAHOO.widget.ContextMenu(
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"mytreecontextmenu",
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{
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trigger: "mytreeview",
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lazyload: true,
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itemdata: [
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{ text: "Add Child Node", onclick: { fn: addNode } },
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{ text: "Edit Node Label", onclick: { fn: editNodeLabel } },
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{ text: "Delete Node", onclick: { fn: deleteNode } }
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]
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}
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);
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/*
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Subscribe to the "contextmenu" event for the element(s)
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specified as the "trigger" for the ContextMenu instance.
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*/
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oContextMenu.subscribe("triggerContextMenu", onTriggerContextMenu);
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});
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</script>
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</head>
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<body class="yui-skin-sam">
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<div id="mytreeview"></div>
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</body>
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</html>
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