OpenLaszlo 4.3 is Released
We are pleased to announce that OpenLaszlo 4.3 is available now. You can
download it from the OpenLaszlo Download page
(http://www.openlaszlo.org/download). It is the recommended platform for
all application development for the SWF8, SWF9, and DHTML runtimes.
OpenLaszlo 4.3 is a major release, with almost 300 bugs fixed since
OpenLaszlo 4.2 introduced the SWF9 runtime.
For those of you who have already upgraded your applications to
OpenLaszlo 4.2.X, no further work is needed. You should just start using
To migrate your 4.0.X or 4.1.1 applications, we strongly suggest that
you refer to this wiki page: Runtime_Differences. This page discusses
the changes required by SWF9 and also provides a methodology for
upgrading your application. It is very important that you run the
automated conversion scripts in the recommended order, should you choose
to take advantage of them.
This release also has a number of improvements, and significant advances
in these areas:
* Audio/Video APIs are working well in this release. Videoplayer
and videoview now show the first frame of the video by default when they
appear, if a URL has been set. (You can control this behavior with new
starttime API.) Live broadcast and recording APIs are working in both
swf8 and swf9. We have also added a new Audio & Video Programming forum
* Incubator components have been updated to work with the 4.3 code
* A new documentation comments feature has been added, so that you
can add an example or comment that expands upon the existing
documentation or shows a non-obvious usage of a feature (or work-around
for a bug that you have already filed) in OpenLaszlo. Documentation bugs
or feature requests should be filed in our JIRA bug tracking system as
in previous releases.
* An improved debugger to deal with deep and circular objects when
printing. The 4.3 release adds two new properties of Debug:
printDepth:Number, default 8, limits how deep the debug printer will go
into an object when printing it; inspectPrintDepth:Number, default 1,
limits how deep the debug printer will go into an object that is a
property of an object when inspecting. The debug printer will also
detect circular objects (rather than causing a stack overflow), at small
cost in overhead. When an object refers to itself (however indirectly),
it will be printed just as its type and ID.
There is also an important change to the "this" behavior. In 4.2 and
later, only declared attributes, i.e.: <attribute name="myattr" … /> can
be referenced lexically (without saying "this".). The swf9 runtime will
generate an error at compile time if you make a lexical reference to an
undeclared attribute. For the swf8 and DHTML runtimes, the old behavior
is supported but deprecated and may cause a compiler warning or error in
We would like to thank the entire OpenLaszlo community for submitting
bug fixes and participating in discussions to help make OpenLaszlo a
better platform. We'd also like to thank the incredible engineering team
at G.ho.st, who have worked with us as a sponsor to bring SWF9 and many
other improvements to the community. Special thanks to André Bargull and
Raju Bitter for their continued and amazing support of the project.
Special recognition goes to community contributors: Sebastian Wagner,
Justin Clift, Ryan Maslar, Sarah Allen, and Wolfgang Stöcher. And
heartfelt thanks to Phil Romanik, Don Anderson, Josh Crowley, and Lou
Iorio for their tireless efforts and significant contributions.