 JavaScript Page 2 - Using Unique and Toggle in a TreeView jQuery Hierarchical Navigation System |
| JavaScript Page 2 - Using Unique and Toggle in a TreeView jQuery Hierarchical Navigation System |
A quick review of the animate argument - JavaScriptThe TreeView jQuery plug-in is a small yet powerful JavaScript application that allows you to build hierarchical navigation systems whose branches can be collapsed and expanded using different animation effects. So if you’re planning to develop a web site that includes a navigation mechanism like this, start reading this series of articles. In it you’ll find a concise guide that will show you how to master the plug-in’s main features, by means of copious hands-on examples. This article is the fourth of six parts.
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Prior to explaining how to use the "unique" and "toggle" options provided by the "TreeView" plug-in, I'm going to quickly review the examples developed in the preceding part of the series. They demonstrated how to work with the "animate" argument in its "fast" and "slow" flavors to apply a scrolling effect to branches of a simple hierarchical tree. That being said, here's how the examples looked originally: (example on using the 'animate: "fast"' option)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>Example on jQuery TreeView (using animated: fast option)</title> <link rel="stylesheet" href="jquery.treeview.css" type="text/css" /> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="jquery.treeview.js"></script> <script> // build treeview after web page has been loaded $(document).ready(function(){ $("#menu").treeview({ animated: "fast" }); }); </script> </head> <body> <ul id="menu"> <li class="closed">Link 1 <ul> <li>Sub link 1</li> <li>Sub link 2</li> <li>Sub link 3</li> <li>Sub link 4</li> <li>Sub link 5</li> </ul> </li> <li>Link 2 <ul> <li>Sub link 1</li> <li>Sub link 2</li> <li>Sub link 3</li> <li>Sub link 4</li> <li>Sub link 5</li> </ul> </li> <li class="closed">Link 3 <ul> <li>Sub link 1</li> <li>Sub link 2</li> <li>Sub link 3</li> <li>Sub link 4</li> <li>Sub link 5</li> </ul> </li> <li>Link 4 <ul> <li>Sub link 1</li> <li>Sub link 2</li> <li>Sub link 3</li> <li>Sub link 4</li> <li>Sub link 5</li> </ul> </li> <li class="closed">Link 5 <ul> <li>Sub link 1</li> <li>Sub link 2</li> <li>Sub link 3</li> <li>Sub link 4</li> <li>Sub link 5</li> </ul> </li> </ul> </body> </html>
(example on using the 'animate: "slow"' option)
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>Example on jQuery TreeView (using slow animated option)</title> <link rel="stylesheet" href="jquery.treeview.css" type="text/css" /> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="jquery.treeview.js"></script> <script> // build treeview after web page has been loaded $(document).ready(function(){ $("#menu").treeview({ animated: "slow" }); }); </script> </head> <body> <ul id="menu"> <li class="closed">Link 1 <ul> <li>Sub link 1</li> <li>Sub link 2</li> <li>Sub link 3</li> <li>Sub link 4</li> <li>Sub link 5</li> </ul> </li> <li>Link 2 <ul> <li>Sub link 1</li> <li>Sub link 2</li> <li>Sub link 3</li> <li>Sub link 4</li> <li>Sub link 5</li> </ul> </li> <li class="closed">Link 3 <ul> <li>Sub link 1</li> <li>Sub link 2</li> <li>Sub link 3</li> <li>Sub link 4</li> <li>Sub link 5</li> </ul> </li> <li>Link 4 <ul> <li>Sub link 1</li> <li>Sub link 2</li> <li>Sub link 3</li> <li>Sub link 4</li> <li>Sub link 5</li> </ul> </li> <li class="closed">Link 5 <ul> <li>Sub link 1</li> <li>Sub link 2</li> <li>Sub link 3</li> <li>Sub link 4</li> <li>Sub link 5</li> </ul> </li> </ul> </body> </html>
Unquestionably, understanding how the "animate" option does its thing is a very straightforward process. When specified with a value of "fast" or "slow," it will make the branches of the targeted tree scroll quickly or smoothly, while being expanded and collapsed. It's that simple, actually. So far, so good. Now that you have hopefully recalled how to work with the "animate" argument given by the "TreeView" plug-in, it's time to explore a few additional features that come bundled with it. In the section to come I'm going to discuss the usage of the "unique" parameter. It can be used for restricting the behavior of a targeted tree, since it'll permit only one branch to be expanded at a time. This can be very useful; if you wish to learn how to work with it, you'll have to click on the link that appears below and read the following section.
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