Availability of lib-gwt-file 0.2

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Lukas Laag

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Sep 24, 2011, 3:50:38 PM9/24/11
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lib-gwt-file 0.2 is now available
(http://www.vectomatic.org/lib-gwt-file). It does not provide new
functionality with regards to the previous release,but is a migration to
GWT 2.4.0.

Changes in this release
-----------------------

As GWT 2.4.0 now provides native support for HTML 5
drag-and-drop,lib-gwt-file 0.2 uses these native event classes instead
of its own,wherever possible. lib-gwt-file�s own drag-and-drop event
classes are deprecated and will be removed in the next release of the
library. Please see the release notes for the list of classes being
deprecated.

Migration guide
---------------

To migrate to lib-gwt-file 0.2,replace the imports to all lib-gwt-file
event classes related to drag-and-drop and replace them with GWT 2.4.0
equivent classes. This is fairly easy as all classes have the same name
(you only need to change the package). There is one exception to this
rule. GWT 2.4.0 DataTransfer class does not expose any file-related
APIs,as GWT 2.4.0 does not yet support the W3C file API. I have thus
provided an extended overlay class wrapper,DataTransferExt,which adds
the missing functionality. Thus,to use it,replace code like this:
FileList files = event.getDataTransfer().getFiles();

with:
FileList files =
event.getDataTransfer().<DataTransferExt>cast().getFiles());

lib-gwt-file-test sample
------------------------

The lib-gwt-file-test
(http://www.vectomatic.org/gwt/lib-gwt-file-test/lib-gwt-file-test.html)
has been migrated to the new API. Support has been added for PNG
files,in order to demonstrate the readAsBinaryString method. However
users should be aware that further changes in this area are very
likely,as September 2011 W3C draft proposes new changes to the
specification.

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