+++ /dev/null
-<!--
- This file is a simple loader for the Lazy Load demo of a Datastore. In this
- Example, a simple extension of ItemFileReadStore that can do rudimentary lazy-loading
- of items into the store is used to showcase how Datastores can hide how data
- is loaded from the widget. As long as the widget implements to the Dojo.data API
- spec, then it should be able to use most datastores as input sources for its
- values.
--->
-<html>
-<head>
- <title>Demo of Lazy Loading Datastore</title>
- <style type="text/css">
-
- @import "../../../dijit/themes/tundra/tundra.css";
- @import "../../../dojo/resources/dojo.css";
- @import "../../../dijit/tests/css/dijitTests.css";
- </style>
-
- <script type="text/javascript" src="../../../dojo/dojo.js" djConfig="isDebug: true, parseOnLoad: true, usePlainJson: true"></script>
- <script type="text/javascript">
- dojo.require("dojo.parser");
- dojo.require("dojox.data.demos.stores.LazyLoadJSIStore");
- dojo.require("dijit.Tree");
- </script>
-</head>
-
-<body class="tundra">
- <h1>
- DEMO: Lazy Loading Datastore used by dijit.Tree
- </h1>
- <hr>
- <h3>
- Description:
- </h3>
- <p>
- This simple demo shows how the dijit.Tree widget can work with a Datastore that does lazy-loading of values into the tree.
- In this demo, the Datastore is an extension of ItemFileReadStore that overrides the <i>isItemLoaded()</i> and <i>loadItem()</i> functions of
- with ones that can detect 'stub' items and use the data in the stub item to load the real data for that item when it
- is required. In this demo, the real data is required when one of the tree nodes is expanded.
- </p>
- <p>
- The key thing to note is that all the lazy-loading logic (how to locate the data from the backend and so forth) is encapsulated
- into the store functions. The dijit.Tree widget only knows about and uses the dojo.data.Read API interfaces to call to the store to
- get items, test if child items are fully loaded or not, and to invoke the <i>loadItem()</i> function on items that are not yet fully
- loaded but have been requested to be expanded into view. It has no knowledge of how the store actually goes and gets the data.
- </p>
-
- <blockquote>
-
- <!--
- The store instance used by this demo.
- -->
- <div dojoType="dojox.data.demos.stores.LazyLoadJSIStore" jsId="continentStore"
- url="geography/root.json"></div>
-
- <!--
- Display the toplevel tree with items that have an attribute of 'type',
- with value of 'contintent'
- -->
- <b>Continents</b>
- <div dojoType="dijit.Tree" id=tree label="Continents" store="continentStore" query="{type:'continent'}"
- labelAttr="name" typeAttr="type"></div>
- </blockquote>
-
-</body>
-</html>
projects / eow / blobdiff