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