327 lines
10 KiB
HTML
327 lines
10 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "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>Advanced Storage Example</title>
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<style type="text/css">
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/*margin and padding on body element
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can introduce errors in determining
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element position and are not recommended;
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we turn them off as a foundation for YUI
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CSS treatments. */
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body {
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margin:0;
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padding:0;
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}
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</style>
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<link rel="stylesheet" type="text/css" href="../../build/fonts/fonts-min.css" />
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<link rel="stylesheet" type="text/css" href="../../build/button/assets/skins/sam/button.css" />
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<link rel="stylesheet" type="text/css" href="../../build/datatable/assets/skins/sam/datatable.css" />
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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/element/element-min.js"></script>
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<script type="text/javascript" src="../../build/cookie/cookie-min.js"></script>
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<script type="text/javascript" src="../../build/swf/swf-min.js"></script>
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<script type="text/javascript" src="../../build/swfstore/swfstore-min.js"></script>
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<script type="text/javascript" src="../../build/button/button-min.js"></script>
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<script type="text/javascript" src="../../build/datasource/datasource-min.js"></script>
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<script type="text/javascript" src="../../build/datatable/datatable-min.js"></script>
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<script type="text/javascript" src="../../build/storage/storage-min.js"></script>
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<!--begin custom header content for this example-->
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<style type="text/css">
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#controls label
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{
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clear: left;
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float: left;
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width: 7em;
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}
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</style>
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<!--end custom header content for this example-->
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</head>
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<body class="yui-skin-sam">
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<h1>Advanced Storage Example</h1>
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<div class="exampleIntro">
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<p>This example shows how to get, set, and remove items from storage using the <a href="http://developer.yahoo.com/yui/storage/">YUI Storage Utility</a> and how to display the current storage contents in a <a href="http://developer.yahoo.com/yui/datatable/">DataTable</a>.</p>
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</div>
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<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
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<!--Input Controls-->
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<div id="controls">
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<label for="nameField">Storage name:</label>
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<input id="nameField" type="text" value=""/>
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<input id="save-button" name="save-button" type="Button" value="Save" /> <input id="remove-button" name="remove-button" type="Button" value="Remove" />
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<br/>
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<label for="valueField">Text to store:</label>
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<textarea cols="30" id="valueField" rows="5"></textarea>
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<br/> <br/>
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<fieldset id="checkboxOptions">
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<legend>Additional Options:</legend>
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<div id="engineGroup" class="inline">
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<input id="html5-button" name="html5-button" type="radio" value="Use HTML5" checked="checked" />
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<input id="gears-button" name="gears-button" type="radio" value="Use Gears"/>
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<input id="swf-button" name="swf-button" type="radio" value="Use SWF"/>
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<input id="session-button" name="session-button" type="Button" value="Use Session"/>
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<input id="purge-button" name="purge-button" type="Button" value="Purge All Local Data" />
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</div>
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</fieldset>
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<br/><br/>
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<div id="datatableContainer"></div>
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</div>
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<!--Always include gears_init.js when you want to support Google Gears: -->
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<script type="text/javascript" src="../storage/assets/gears_init.js"></script>
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<!--Local Scripts-->
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<script type="text/javascript" >
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/**
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* Pointer to the Storage instance
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*/
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var storage;
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YAHOO.util.StorageEngineSWF.SWFURL = 'swfstore.swf';
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/**
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* Pointer to the DataTable instance
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*/
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var datatable;
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var saveButton;
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var purgeButton;
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var removeButton;
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var gearsCheckbox, engineRadio;
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/**
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* Initialization scripts
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*/
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function initialize() {
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// evaluate and create the Storage instance
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var engineBtn = engineRadio.get("checkedButton");
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var engineType = engineBtn.get("value");
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var useSession = sessionCheckbox.get("checked");
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var location;
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location = YAHOO.util.StorageManager[useSession ? 'LOCATION_SESSION' : 'LOCATION_LOCAL'];
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storage = YAHOO.util.StorageManager.get(engineType, location, {force: false});
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//storage.unsubscribe(storage.CE_CHANGE, onChange);
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storage.subscribe(storage.CE_CHANGE, onChange);
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if (storage.isReady || (storage._swf && YAHOO.util.StorageManager.LOCATION_SESSION === location)) {
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load();
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} else {
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saveButton.set("disabled", true);
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purgeButton.set("disabled", true);
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removeButton.set("disabled", true);
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engineRadio.set("disabled", true);
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storage.subscribe(storage.CE_READY, onContentReady);
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}
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}
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/**
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* This gets called once Storage is initialized and ready to be used.
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* We disabled the buttons previously, so once they're usable we'll enable them here.
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*/
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function onContentReady(event) {
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saveButton.set("disabled", false);
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purgeButton.set("disabled", false);
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removeButton.set("disabled", false);
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engineRadio.set('disabled', false);
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engineRadio._buttons[0].set("disabled", ! YAHOO.util.StorageEngineHTML5.isAvailable());
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engineRadio._buttons[1].set("disabled", ! YAHOO.util.StorageEngineGears.isAvailable());
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engineRadio._buttons[2].set("disabled", ! YAHOO.util.StorageEngineSWF.isAvailable());
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sessionCheckbox.set("disabled", false);
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storage.unsubscribe(storage.CE_READY, onContentReady);
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load();
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}
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/**
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* Clear out all data
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*/
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function purge() {
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storage.clear();
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datatable.deleteRows(0, datatable.getRecordSet().getLength());
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}
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/**
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* Called when a save is successful
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*/
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function onChange(event) {
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if (event.type === YAHOO.util.StorageEvent.TYPE_ADD_ITEM || event.type === YAHOO.util.StorageEvent.TYPE_UPDATE_ITEM)
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{
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var newobj = {name: event.key, value: event.newValue};
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var len = datatable.getRecordSet().getLength();
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//loop through current records and see if this has been added before
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for (var i = 0; i < len; i++ )
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{
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var rec = datatable.getRecord(i);
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var data = rec.getData();
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//if it's been added already, update it
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if (data.name == event.key)
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{
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datatable.updateRow(i, newobj);
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return;
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}
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}
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//if it's not been added, add it
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datatable.addRow(newobj);
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}
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//removed
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else if (event.type === YAHOO.util.StorageEvent.TYPE_REMOVE_ITEM)
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{
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var len = datatable.getRecordSet().getLength();
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//loop through current records and see if this has been added before
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for (var i = 0; i < len; i++ )
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{
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var rec = datatable.getRecord(i);
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var data = rec.getData();
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//if it's been added already, update it
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if (data.name == event.key)
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{
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datatable.deleteRow(i);
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return;
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}
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}
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}
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}
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/**
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* Called when something bad happens
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*/
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function onError(event) {
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alert("Event " + event.message);
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}
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/**
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* Gets the data from Storage when the page loads
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*/
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function load() {
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var len = storage.length;
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var arr = [];
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// clear the existing datatable
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if (datatable)
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{
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datatable.deleteRows(0, datatable.getRecordSet().getLength());
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}
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for (var i = 0, key, newobj; i < len; i++)
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{
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key = storage.key(i);
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newobj = { name:key, value: storage.getItem(key) };
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arr.push(newobj);
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if (datatable) {datatable.addRow(newobj);}
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}
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// only initialize the datatable once
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if (! datatable)
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{
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var datasource = new YAHOO.util.LocalDataSource(arr);
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datasource.responseSchema = {fields : ["name", "value"]};
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var configs =
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{
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scrollable: true
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}
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var columns =
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[
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{key:"name", label:"Storage Name (Key)"},
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{key:"value", label:"Text Stored"}
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];
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datatable = new YAHOO.widget.DataTable("datatableContainer", columns, datasource, configs);
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}
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}
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/**
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* Save the data locally
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*/
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function save() {
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storage.setItem(YAHOO.util.Dom.get('nameField').value, YAHOO.util.Dom.get('valueField').value);
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}
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/**
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* Remove an item from storage
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*/
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function remove() {
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var key = YAHOO.util.Dom.get('nameField').value;
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storage.removeItem(key);
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}
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/**
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* Called when the buttons are ready to be initialized
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*/
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function onButtonsReady() {
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saveButton = new YAHOO.widget.Button("save-button");
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purgeButton = new YAHOO.widget.Button("purge-button");
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removeButton = new YAHOO.widget.Button("remove-button");
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engineRadio = new YAHOO.widget.ButtonGroup("engineGroup");
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sessionCheckbox = new YAHOO.widget.Button("session-button", {type:"checkbox",value:"0",checked:false});
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engineRadio._buttons[0].set("value", YAHOO.util.StorageEngineHTML5.ENGINE_NAME);
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engineRadio._buttons[1].set("value", YAHOO.util.StorageEngineGears.ENGINE_NAME);
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engineRadio._buttons[2].set("value", YAHOO.util.StorageEngineSWF.ENGINE_NAME);
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saveButton.on("click", save);
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purgeButton.on("click", purge);
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removeButton.on("click", remove);
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sessionCheckbox.on("checkedChange", initialize);
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engineRadio.on("checkedButtonChange", initialize);
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//initialize
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initialize();
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YAHOO.util.Dom.get('nameField').focus()
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}
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YAHOO.util.Event.onContentReady("controls", onButtonsReady);
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</script>
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<!--END SOURCE CODE FOR EXAMPLE =============================== -->
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</body>
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</html>
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