Yahoo Mobile Widgets

Mobile Widgets Jose Palazon Mobile Engineer

Where do I start I want to develop a mobile app. Where do I start? Problems Screen resolution and sizes OS and SDKs M emory

What is blueprint? T h e name of the platform The name of the language You write your apps once in blueprint The platform will make them work in as much devices as possible. Widgets and snippets.

Blueprint guidelines Takes care of UI and interaction You can concentrate on features Create complex elements easily (maps, pagination, …) Choose the best possible experience for each handset No extra effort on your side

Maximum Fidelity Run everywhere we can..

Snippets Live in the mobile home page Have 2 views: normal Extended [opt]

Widgets Have their own set of pages Accessed from carousel

Blueprint sample  <page> <content> <section> <module> <trigger> <label>Click Me!</label> <load-page event="activate“ page="greet.xml" /> </trigger> </module> </section> </content> </page>  <page id="greet"> <content> <section> <module> <header layout="simple"> <layout-items> <block class="title">Greeting</block> </layout-items> </header> <block>Hello World!</block> </module> </section> </content> </page>

Rich set of controls available Navigation bar Image list tables Maps & directions location

Display controls Blocks, placards, image lists, data input (simple, multiline, passwd)… Complex elements: maps, driving directions, pagination … Complete spec document in SDK

A more complex example: location-based mashup

Detail view of event + map linking to map widget

HTML version: detail view of photo + map

Parts of a widgets Part 1: resides on Y! Servers: C onfig.xml G allery.xml R esources/images Part 2: resides on public Server: Server side code generates your BP

How it works? (HTML) HTML renderer Widget engine Your server html BP

What’s in the SDK Templates for creating your apps. Code samples A php helper class XML Schemas for validation The blueprint specification guide Readme and release notes

A note on Images Automatic handling of different sizes Naming convention makes it work <name>_<width>x<height>.<extension> Just reference by identifier <image reference="icon" size="small"/> Fill-styles only work on uploaded images Check the manual for screen/size optimal sizes.

Server code Use your preferred technology. Just output bluepirnt. Content type application/x-ywidget+xml application/x-ysnippet+xml Cache-control : no-cache

C onfig.xml <?xml version="1.0" encoding="UTF-8"?> <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://mobile.yahoo.com/widgets/schema/1.0/config/"> <title>YDN Widget</title> <version>1.0</version> <identifier>ydn-widget-1</identifier> <description>YDN Widget</description> <icon>ybang</icon> <author organization="Yahoo!" href="http://developer.yahoo.com" email= [email_address] >Jose Palazon</author>  <widget base="http://www.noletia.com/ydn"> <preview> <icon>ybang</icon> <label>YDN Widget</label> </preview> <shortcuts> <item default="true"> <label>YDN Widget</label> <href>index.php</href> </item> </shortcuts> </widget> </config>

Server side code <?php header( "Content-Type: application/x-ywidget+xml" ); header( "Cache-Control: no-cache" ); $xsl = "ydn.xsl"; $xml = "http://developer.yahoo.com/blog/index.xml"; $xslt = new XSLTProcessor(); $xslt->importStyleSheet(DOMDocument::load($xsl)); echo ($xslt->transformToXML(DOMDocument::load($xml))); ?>

Server side code <?xml version="1.0" encoding="ISO-8859-1"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="xml" encoding="utf-8" doctype-public="-//W3C//DTD XHTML 1.0 Transitional//EN" doctype-system= http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd indent="yes"/> <xsl:template match='//channel'> <page> <content> <section> <header layout="simple"> <layout-items> <block class="title">YDN Widget</block> </layout-items> </header> </section> <xsl:apply-templates select="item" /> </content> </page> </xsl:template> <xsl:template match="item"> <placard layout="card" class="link"> <layout-items> <image resource="ybang"/> <block class="title"><xsl:value-of select="title"/></block> <block class="description"><xsl:value-of select="pubDate"/></block> <block class="subtext"><xsl:value-of select="category"/></block> </layout-items> <load resource="{link}" event="activate"/> </placard> </xsl:template> </xsl:stylesheet>

Step 4: test your server code Go to your server url in the browser Force content-type firefox extension F rom: application/x-ywidget+xml to: application/xhtml+xml

Submit your widget to Yahoo! Zip xml files and resources Use a browser to go to: http://mobile.yahoo.com/developers/test/upload Go to beta.m.yahoo.com Test!

Note: Work in progress! For more help: Dev Guide Developers Group http://tech.groups.yahoo.com/group/yhoomobiledevelopers

Questions? Jose Palazon [email_address]

Yahoo Mobile Widgets

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