Send and Post Events from an Event Listener................................................................... 48
Post Events............................................................................................................. 48
Send Events............................................................................................................ 49
Thread Model.............................................................................................................. 49
Suspend and Resume............................................................................................... 49
Long Operations...................................................................................................... 50
Example: A Working Thread Generates Labels Asynchronously................................... 51
Alternative 1: Timer (No Suspend/Resume)............................................................. 52
Alternative 2: Piggyback (No Suspend/Resume, No Timer)......................................... 53
Initialization and Cleanup of Event Processing Thread....................................................... 54
Initialization Before Processing Each Event.................................................................. 54
Cleanup After Processed Each Event........................................................................... 55
6. The ZK User Interface Markup Language....................................................................56
XML........................................................................................................................... 56
Elements Must Be Well-formed.................................................................................. 56
Special Character Must Be Replaced........................................................................... 57
Attribute Values Must Be Specified and Quoted............................................................ 57
Comments.............................................................................................................. 57
Character Encoding.................................................................................................. 57
Namespace............................................................................................................. 58
Auto-completion with Schema................................................................................ 59
Conditional Evaluation.................................................................................................. 59
Iterative Evaluation...................................................................................................... 59
The each Variable.................................................................................................... 60
The forEachStatus Variable........................................................................................ 60
How to Use each and forEachStatus Variables in Event Listeners..................................... 61
A Solution: custom-attributes................................................................................ 61
Load on Demand......................................................................................................... 62
Load-on-Demand with the fulfill Attribute.................................................................... 62
Load-on-Demand with an Event Listener..................................................................... 63
Implicit Objects........................................................................................................... 63
List of Implicit Objects.............................................................................................. 63
Information about Request and Execution.................................................................... 65
Processing Instructions................................................................................................. 65
The page Directive................................................................................................... 65
The component Directive........................................................................................... 67
The by-macro Format........................................................................................... 67
ZK: Developer's Guide Page 5 of 231 Potix Corporation
