ZK 2.4.2

Released on December 19, 2007.

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Getting Simpler and Richer

Feature Updates

• 77 XUL and 83 HTML off-the-shelf components.
  • Tabbox, grid, listbox, tree, menu, combobox, bandbox, datebox, chart, hbox, vbox, window, slider, paging, audio, image, timer, include, iframe...
  • Drag-and-drop supported by all components, such that users can drag components and drop them to any other or particular set of components.
  • Context menus and customizable tooltips supported by all components, such that a menu or any popup appears when user click, right-click or move the mouse over a component.
  • Customizable sorting of listbox, grid and children of any component with 100% Java codes (java.lang.Comparator).
  • Auto-completion for combobox.
  • Load on demand with writing Java codes.
  • Live data for listbox.
  • Grids, listboxes and trees with sizable columns.
  • All components are cloneable and serializable.
  • Validation and formatting for any input components, such as regular expression and $#,##0.
  • 100% Java API of Google Maps, FCKeditor, DOJO, and Timeline components.
• Event-driven, server-centric model
  • More than 20 events are supported: onChange, onChanging, onScroll, onSelect, onShow, onZIndex...
  • All events are processed at the server. No hurdle to communicate between clients and servers.
  • All events are synchronized. No racing condition to worry about.
• ZK User-interface Markup Language (ZUML).
  • Rich user interface could be designed in ZUML as simple as authoring HTML pages.
  • Powerful yet intuitive control flow by the if, unless and forEach attribute.
  • Scripting in EL expressions and your favorite scripting languages, include but not limited to Java, JavaScript, Ruby and Groovy.
  • Hot changes and updates without restarting your Web applications.
  • Annotations that allow a page to acess database with zero Java codes.
• Browser history management.
  • Add states to browser's back button history. Then, users can bookmark and use the back and forward button to navigate different states of the same ZK desktop.
• Simple yet boundless component model.
  • Macro components. Developing a full-feature new component by using another ZUML pages.
  • Inheritable customization. Developing a new component by extending existent components.
  • Seamlessly and easily to encapsulate pure-client components as ZK components with 100% Java API.
  • Customizing components with pre-compiled Java classes, or by scripting in your favorite scripting languages, include but not limited to Java, JavaScript, Ruby and Groovy. The choice is yours.
• Simple yet flexible threading model.
  • Thread-safe component handling.
  • True server-side Modal dialog.
  • Suspend and resume event listeners freely.
• 100% Customizable User-Interface factory.
  • Loading ZUML pages not only from Web contents but also any repository such as database.
  • Customizing the features of sessions, desktops and pages.

What's New

• New Features:
  • 1820771: Make ZK independent of JSP
  • 1852144: A way to delay eval of a property value to rendering phase
• Bug fixes:
  • 1839246: More reliable handling of Ajax requests
  • 1830311: Cannot display Japanese messages
  • 1835878: select / colapse of a Treeitem scrolls tree to right.
  • 1814298: Memory Leak in EventThread
  • 1818500: IE Cache Problem.
  • 1840101: Exception when sendRediect from a modal dialog
  • 1845026: adding draggable to tree breaks event processing order
  • 1847708: OnBookmarkChanged doesn't send
  • 1849076: NoSuchElementException in UiVisualizer
  • 1850895: encodeURL causes IllegalStateException with Websphere 5.1.1

Upgrade Notes

• The pageContext variable in EL expressions becomes an instance of org.zkoss.web.servlet.xel.PageContext.
• The implementation of the expression evaluator must implement org.zkoss.xel.ExpressionEvaluator, rather than javax.servlet.jsp.el.ExpressionEvaluator.