ZK Developer's Guide/Fundamental ZK/ZK User Interface Markup Language

This documentation is for an older version of ZK. For the latest one, please click here.

Overview

• Overview

XML

• Elements Must Be Well-formed
• Special Character Must Be Replaced
• Attribute Values Must Be Specified and Quoted
• Comment by <-- -->
• Character Encoding

zscript

• Write Java code in ZUML
• Hints to read zscript
• Distinguish zscript from EL
• Java Interpreter (BeanShell)
• zscript other than Java

Implicit Objects

• Overview
• List of Implicit Objects
• Information about Request and Execution
• Lifecycle of page, execution, desktop, session, application
• About xxxScope

Expression Language (EL)

• Overview
• Access Java Bean
• Access ZUML Component
• Access Implicit Object
• More EL Examples
• Import Java Method's

ZK Processing Instructions

Directives to control whole page behavior

Processing Instruction Name	Description
page	Describes attributes of a page
component	Defines a new component for a particular page

ZK Attributes

Act on component, such like conditional evaluation, iteration, load on demand.

Attribute Name	Description
if	Conditional evaluation of an component
forEach, each	Iterative evaluate component against a collection
use, apply	Write event handling code in pure java file. apply support MVC pattern better.
forward	Let centralized controller handle events.

ZK Elements

Helper component that's not UI. It helps to save variable, write java code in ZUML, and others.

Element Name	Description
zk	Aggregate other components
zscript	Write java code in ZUML
attribute	Make the page more readable
variables	Store variable in namespace scope
custom-attributes	Store variables in different scopes

Component Sets and XML Namespaces

• Overview
• Standard Namespaces
• Mix With Another Markup Language