OpenLazlo 4.0

OpenLaszlo is the leading open source platform for the development and delivery of rich Internet applications on the World Wide Web
OpenLaszlo is a tool written in XML and JavaScript and transparently compiled to Flash and, with OpenLaszlo 4, DHTML. The OpenLaszlo APIs provide animation, layout, data binding, server communication, and declarative UI. An OpenLaszlo application can be as short as a single source file, or factored into multiple files that define reusable classes and libraries.
Main features:
- SOLO deployment option: OpenLaszlo 3.0 introduces two ways to deploy your application: SOLO or with the OpenLaszlo Server. Applications that provide data integration via XML over HTTP may be deployed SOLO (Standalone OpenLaszlo Output) from any HTTP Web server. This capability dramatically simplifies deployment and reduces serving costs. Applications that require data integration via SOAP, XML-RPC or Java-RPC, or that require persistent connection capabilities or run-time media transcoding are deployed with the OpenLaszlo Server within J2EE or Java Servlet Container environments.
- Unicode Support: OpenLaszlo 3.0 introduces support for unicode, enabling OpenLaszlo applications to be localized to most international language character sets. Unicode is supported in both LZX source code and in XML data.
- Drawing API: The new OpenLaszlo Drawing API implements a subset of the whatwg.org drawing API standard. This API enables the creation of circles, ovals, fills and lines and provides the foundation for charting and graphing components.
- Dynamic Libraries: A dynamic library is a portion of a program that can be loaded after the main application execution file has loaded. The goal for dynamic libraries is to reduce the initial download size of a Laszlo application. This is important because initial download size (including all requests that precede initial user interaction) is used to evaluate web applications. Reducing the initial download size has the additional benefits of reducing the time to first interaction (although there are other ways of doing this), and of reducing bandwidth costs in the case where an optional feature of the application is not used.
- Performance Optimizations: Additional optimizations take advantage of the unique capabilities of the Flash 6 and Flash 7 players to minimize application size and increase execution speed.
- Platform name change: The platform name has changed from Laszlo Presentation Server to OpenLaszlo to reflect the new SOLO deployment capability, and to underscore the open source license covering the OpenLaszlo project.
Enhancements:
- SOLO deployment
- Smaller file sizes (using internal gzip compression)
- Dynamic libraries
- Unicode support
- Optimized for Flash Player versions 6 and 7
- Settable timeouts
- Drawing API
- Client fonts
- Resizeable canvas
- Integration with browser JavaScript
- Support for browser back button
- Support for ("right click") context menu
- Support for mouse wheel
- Text maxlength and restriction
- Debugging improvements
- Performance enhancements
- Separate Designer and Deployer guides
- The name of the product is now "OpenLaszlo".