EuroBridge Widget Set (Version 2.1)
-----------------------------------
Major changes from previous version (2.0): This is quick bug fix
release for TextEd widget. It now has improved expose strategy which
gives less flicker. Widgets have now exposeCallback resource and they
can be used as drawing areas. For more details look into CHANGELOG
(and BUGS).

The documentation file Xew-2.1.ps.gz has been printed out with size
8.5" x 11". Only minor changes compared to 2.0 version.

EuroBridge Widget Set is planned to contain a set of data presentation
widgets. Each widget is a container for an information which can be
imported into the widget in one of the specified interchange formats
(ISO 2022/ANSI/ISO 8859-1 Text, JPEG/JIF, TIFF, G.711, H.261, MPEG,
ODA/ODIF, etc). The work on this set is being done for the needs of
the RACE project R2008 (EuroBridge), but as it relies heavily on the
freely available existing software from the net, it has been decided
that this widget set will also be freely usable.

   Currently Text, Raster, Video and Audio (Sun specific!) have
   an implementation.

Xew has been compiled on following configurations:
--------------------------------------------------
SunIPX		SunOS 4.1.3	X11R5	Gnu C 2.2.2 (ANSI C)
SunIPX		SunOS 4.1.3	openwin	cc
Sun (SPARC)	Solaris 2.3	openwin	Gnu C
HP 9000/750	HPUX 8.07	X11R5	HP CC (K&R C)
HP 9000/750	HPUX 9.x	X11R5	HP CC (also with ANSI C)
Apollo DN3500	SR10.2		X11R4	Apollo C 6.6 (almost ANSI C)
IBM RS6000	3.2?		?	?
DEC Alpha	DEC/OSF1 v1.2	X11R5	DEC C for OSF/1 AXP (ANSI C)

It should compile in other environments, but Imakefiles may require
more or less tuning.

Required packages:
------------------
Xew-2.1.tar.gz		Xew source code (including simple test progs)

Optional addons:
----------------
Xew-2.1.ps.gz		The Widget documentation
tiff.v3.2.tar.Z		Sam Leffler's TIFF library (tifflib-3.2beta?)
jpegsrc.v4.tar.Z	Independent JPEG group JPEG library

The widget library contains five basic widgets: Text, TextEd, Raster,
Audio and Video. Audio and Video still have a very limited
implementation. There is also a stub for Geometric widget, which
currently does not do anything (see the Xew-2.0.ps documentation for
the details).

The package includes simple sample programs which demonstrate the
basics of the widgets.  The program 'viewer' activates a Xew widget(s)
into Athena Porthole widget and controls it with Athena Panner widget
(X11R5 required, uses Viewport for X11R4).  'simple' activates the
widget(s) into separate shells and doesn't have any controls.  'texted'
is a raw low level interface to the XeTextEd widget and can be used to
test the features. 'tagged' shows one way of using the TextEd in tagged
mode (a skeleton implementation of MIME text/enriched editor is used as
an example). The program 'audio' demonstrates use of Audio widget (Audio
widget has driver only for Sun SPARC /dev/audio). 'video' is similar to
'audio', but plays MPEG stream.

Final comments
--------------
There is room for many optimizations. The Video widget is currently just
a "proof of concept", that it can be done. It is slower than the original
Berkeley mpeg_play (for fastest responce you have to disable dithering and
select colorMode=gray). [Warning: Video does not support TrueColor or
DirectColor visuals.] TextEd widget is not intended for large text contents,
the response time in editing is directly proportional to the length of the
content.

If you retrieve this software and have any difficulties in getting it
to work, don't hesitate to mail me, even if you solved the problem.  I
am more than eager to fix all bugs that are found, if I only can. All
portability issues are of interest also. If you have any wishes about
new features and support, give me a hint and I may implement it.

------------------------------------
Mail comments to 'savela@tel.vtt.fi' (or Markku.Savela@vtt.fi)