WML (Wireless Markup Language) - A Comprehensive Review, Slides of Fundamentals of E-Commerce

Download WML (Wireless Markup Language) - A Comprehensive Review and more Slides Fundamentals of E-Commerce in PDF only on Docsity!

WML II
WML
WMLScript

WML - A Quick Review
^ Document structure^ ^ , ...
^ Text and image controls^ ^

..., ,

...,
^ Navigation controls^ ^ , , ,
^ Events^ ^ onenterforward, onenterback, ontimer^ ^ ^ ^ ..., ...
^ Variables^ ^ , $(foo)

WML - Examples
^ Loading an image--

Hello world!

^ ^

WML - Examples
^ Using a softkey-- ^ ^

Hello world!

^

Hello world!

WML - Examples
^ Using a timer--

Hello world!

Hello world!

WML - Examples
^ Table layout--

^ Hello^ world!

^

WML - Input Revisited
^ The tag:^ ^ Use to record variable user input^ ^ name="

variable " :^ required  Can specify formatex: “NNNNN” maps to exactly five digits. “NNaaaa” maps totwo digits followed by four letters. The phone won’taccept anything else.  Can specify type=“password” for secure (ie hidden) entry  Can specify maxlength=“...” for the max number of charactersof data the user can enter  How the phone chooses to render the input box is up to thephone. Don’t depend on there being, say, a little black box.

WML - Input Revisited
^ The tag:^ ^ Use to limit user entry between several possible options^ ^ Can be used for links, as well^ ^ name="

variable ” is optional; can just use

onpick^ (below).

^ multiple=“true” or “false” : allow multiple selections.^ In the case of multiple selections, the values are stored as a semicolon-delimited list. ^ value=“...” : sets the default value of the tag’s variable
The ^ value=“...” determines the value that this option sets for thevariable named by the enclosing tag ^ onpick=“url” : when the user selects this option, links directlyto another card or page. ^ You can also catch “onpick” events from the tag.

WMLScript
^ WMLScript is similiar to JavaScript in function; itallows a more powerful and controllable degreeof scripting control than offered by simple WML.
^ WMLScript offers a decent range of string-manipulating and mathematical functions.
^ Each WMLScript file is full of

functions

. Each

function is either

local --used only within the file--

or^ external

--accessible from other WMLS and

WML files.^ ^ To declare a function

extern , put the word extern before its

declaration.