File: CHANGES-0.6

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October 23rd 1998  ivtools-0.6.12

Drawing Editor Changes

	* ivtools drawtool can now automatically open or import (over the
 	net) a wider variety of graphical file formats, using external
 	filters that convert to idraw PostScript or a pbmplus image
 	format:

	    arbitrary PostScript  	--> 	pstoedit
	    GIF				-->	giftopnm
	    TIFF			-->	tiftopnm
	    JPEG			-->	djpeg

	drawtool can also launch on idraw PostScript and pbmplus image
 	formats (PBM/PGM/PPM in raw and ASCII), a new feature.  Before
 	these could only be imported.

	The import dialog box still behaves the same as before.  It can
 	import drawtool or idraw documents, PBM/PGM/PPM image formats,
 	anything that can be converted with a Unix command line to those
 	formats if the "pipe-from-filter" button is checked, and anything
 	that can be handled by the anytopnm script if the "auto-convert"
 	button is checked.

	* ivtools flipbook inherits the same new support for an extended
 	set of graphic file formats imported over the net.  However it
 	still only launches on (opens) flipbook format files.

Script Changes

	* add a new bash script, cntsrclines, to count the lines of source
 	in a source tree, using comterp to sum it up.

	* add a new bash script, tiftopnm, which wraps the pbmplus filter
	tifftopnm, which can't handle stdin directly itself.

	* add support for dithering of JPEG's to the standard colormap to
 	anytopnm.

	* add support for using a newly created temporary file name in the
 	ivgetjpg script, which downloads a JPEG URL using w3c and exports
 	it over the net to an ivtools drawing editor using comterp in
 	telcat mode.
	
Utility Changes

	* add a new src/utils directory, and populate it with two small
 	programs:
  	
	         tmpnam       --   write newly generated temporary file
	                           name to stdout.  
	
                 stdcmapppm   --   write 216 pixel PPM image with one entry
		                   for each color in the standard X11
	                           colormap (6R*6G*6B == 216).

	Both are used in the tiftopnm and anytopnm scripts described
 	above.

	* change "comterp telcat" to read/write with a 1K buffer instead
 	of a character at a time.

Library Changes 

        -- ComTerp --
	
	* fix bugs in ComTerp where the nargs associated with a
 	KeywordType ComValue were being taken from ::nargs instead of
 	::keynarg_val.

	* fix bug in ComTerpServ where a new _pbuf was getting allocated
 	of size _pfnum instead of _pfsiz.

	* fix bug in saving ComTerp state in ComTerpServ(const char*
 	expression...)  Similar problems still exist in ComTerp::runfile
 	and ComTerpServ::runfile, I'm sure.

	* zero out all the unique member variables of ComValue (the ones
 	that AttributeValue does not have).

	-- OverlayUnidraw --

	* fix bug in OverlayCatalog where member variable _ed needed to be
 	initialized to nil before it was set.  Similar bug in
 	OverlayEditor for _viewer member variable.

	* change OverlayCatalog::Retrieve to use an OvImportCmd to
 	construct whatever it needs.  In this way the open (via dialog box
 	or command line) and import over the net can handle the same set
 	of file formats. The import via dialog box hasn't been modified
 	yet to make use of this mechanism, so the set of formats it
 	supports with or without the auto-convert button is different.

	* add support to OvImportCmd::Import(istream&) for new file
 	formats using external filters that convert to idraw or pbmplus
 	formats as described above.

	* fix over-the-net import for PGM and PPM ASCII formats

	* add support for reading ASCII PBM images.

	-- FrameUnidraw --

	* add support for importing drawtool documents via dialog box into
 	the flipbook editor.

	-- ComUnidraw -- 

	* add an update func to ComUnidraw, to do an immediate mode update
 	of the Unidraw environment.  This allows for watching the progress
 	of a for-loop in comdraw that is drawing graphics.

Config/Build Changes

	* make use of the --prefix=DIR argument of the ./configure script,
 	to set the prefix used when InstallRelative is false.

	* change all the Imakefile's to not use -xc or -xc++ argument for
 	gcc/g++ (because various egcs distributions no longer support
 	this).

	* add rules to config/rules.def to support explicit C (instead of
 	C++) compilation.  Tie this to the configure script's CC variable.

	* change the default CCDriver for Linux to g++, and create a
 	default CDriver, gcc.

	* move build of GraphUnidraw and graphdraw after FrameUnidraw and
 	flipbook.



October 6th 1998  ivtools-0.6.11

Config and Miscellaneous Changes

	* utilize the configure script to determine the C++ compiler

	* make use of the configure script the default for all supported
 	OS'es (i.e. linux, solaris, sunos4, hpux, irix5, and alpha).

	* add --enable-install-relative[=ARG] and --enable-use-rpath[=ARG]
 	to the configure script.

	* make use of the PWD environment variable to define the base of
 	the ivtools source tree, which is in turn used to fix this value
 	for the ivmkmf script.  Now the ivmkmf script can be slackly used
 	from within something like the original 3.1 source tree to build
 	stand-alone example programs (i.e. doc or logo) on top of ivtools.

	* add shell script wrappers that preset the PATH and
 	LD_LIBRARY_PATH environment variables for each of the following
 	executables:

		ivct --> comterp
		ivdt --> drawtool
		ivcd --> comdraw
		ivfb --> flipbook
		ivgd --> graphdraw
		ivds --> drawserv

	* make most of the changes suggested by Bruno Delfosse after
 	compiling with insure++ 4.1 on an Alpha.  This tool discovered
 	places where no value was returned, places where the number and
 	type of arguments to a printf call did not match the format
 	string, and a few places where significance was lost when
 	converting a pointer to an int on a 64 bit architecture.  It also
 	reported on places where a local (auto) variable reference was
 	returned, and called it an error.  However, since the reference
 	was to a non-local variable (an object in the middle of a member
 	array of objects) these were ignored. A patch was added to the web
 	pages that can be used to reproduce his build environment:

	        http://www.vectaport.com/ivtools/insure.ALPHA.patch

Drawing Editor Changes

	* change the orientation of the Text manipulator when the
 	orientation of the viewer has changed.  Debian bug request by Mark
 	Eichin <eichin@arepa.com>, #26165.

Interpreter Changes

	* finalize implementation of while and for commands.  Here are two
 	sets of test commands that now work as expected:

	for(i=0 i<10 i++ :body if(i/2*2==i 
	    :then print("even\n") :else print("odd\n")))

	i=10;while(i :body i--;print("%d\n" i))

	* add sum, mean, var, stddev, and sqrt commands to comterp
	
	* make the interpreters brought up under the Editors menu (in
 	comdraw, flipbook, and graphdraw) be an instance of the default
 	interpreter for that application.  In this way the interactive
 	interpreter dialog box can be used to control the application.
  	However it still needs some thought and work, because by default
 	it is set up to act on only the current selection list, computing
 	attributes for each selected object.
	
Library Changes 

	-- ComTerp --

	* fix bug in ComTerp::eof(), where an empty unitialized token
 	buffer would cause a segfault.

	-- Unidraw --

	* upgrade Unidraw to work on 64 bit architectures, by changing the
 	places where an int was being used to store a void*.  This
 	affected the Unidraw API in two places: ObjectMap::GetId and
 	UHashTable::Hash, which now return an unsigned long instead of an
 	int.

	-- ComUnidraw --

	* add all the default commands to the interpreter initialized by
 	ComEditor::AddCommands(ComTerp*)

	-- FrameUnidraw --

	* actually check the value of FrameEditor::_autonewframe before
 	executing the body of FrameEditor::DoAutoNewFrame().


September 24th 1998  ivtools-0.6.10

Config and Miscellaneous Changes

	* introduce a configure script that has been setup and tested
	on Linux only.  See Appendix A in the INSTALL file for more
	details.

	* add a MANIFEST.perceps file to list the files processed by
	PERCEPS (http://friga.mer.utexas.edu/mark/perl/perceps/).
	Resulting web pages posted at:

	http://www.vectaport.com/ivtools/classes/

Drawing Editor Changes

	* fix recently introduced bug in "New View" command.  Now it is
	back to its old self.

Interpreter Changes

	* fix evaluation of nested post-evaluation (control) commands with
 	keyword arguments.  So now something like the following works:

if(a :then if(b :then if(c :then "abc" :else "ab!c") :else if(c :then "a!bc" :else "a!b!c")) :else if(b :then if(c :then "!abc" :else "!ab!c") :else if(c :then "!a!bc" :else "!a!b!c")))

	By default this will print "!a!b!c".  Set values of a, b, and c 
	(i.e. "a=1") to see the other possibilities.

Library Changes 

	-- OverlayUnidraw --

	* fix ArrowMultiLinePS::Definition to better support ivmaps
	export of map line features in idraw postscript format.


September 14th 1998  ivtools-0.6.9

Drawing Editor Changes

	* add support for ASCII PGM and PPM image files to the import
 	service of all the drawing editors (previously it was supported
 	only via the import dialog box).

	* add "Auto New Frame" mode (under the Frame menu) to flipbook
 	editor, so that each imported object can automatically be placed
 	in a newly created frame.  This feature is enabled by default for
 	the import service but not the import dialog box.

	* limit screen repair on the flipbook editor to only the times
 	when something actually changed within the viewer.  This speeds
 	the processing of repeated Ctrl-f's that run off the end of the
 	frames.

Interpreter Changes

	* fix display of parser/scanner error strings.  Now something like
	"3 + + 4" or an unterminated character string (no double-quote
	or back-slash before a new-line) are handled correctly and
	reported on correctly.  This has always been a capability of
	the underlying compiler components written in C (fashioned
	after the Fischer-LeBlanc textbook), but a bug existed in the
	interface to the C++ objects.

Library Changes 

	-- ComUtil --

	* convert to all new-style function arguments to facilitate
 	compilation with CC (type declararions included with argument
 	names).

	* add an underbar to the front of ComUtil files parser.c,
 	scanner.c, and lexscan.c, to keep gdb from confusing them with
 	ComTerp/parser.c, ComTerp/scanner.c, and Attribute/lexscan.c.

        -- ComTerp --

	* add a "boolean once=false" argument to ComTerp::run, so that it
 	can be used by ComTerp/comhandler.c

	* use the body of ComTerp::run from ComTerpServ::run, instead of
 	its own copy of the run-eval loop.

	* add Parser::Parser(istream&), so a parser can be started up on
 	an existing istream.  Also add static methods
 	Parser::istream_fgets, ::istream_feof, and ::istream_ferror, so
 	the scanner, parser, or interpreter can be run on an istream as
 	well a FILE* and via sockets.

	-- OverlayUnidraw --

	* add support for ASCII PGM and PPM to OvImportCmd::Import(istream&)

	* add OverlayScript::skip_comp(istream&) to skip unrecognized
 	components being read in by an istream constructor (of something
 	derived from OverlayComp).

	* fix defaulting of _grayflag in OverlayRaster to false.

        -- FrameUnidraw --

	* add auto-new-frame mode to FrameEditor, which causes OvImportCmd
 	to create a new frame for each import.  New methods on
 	FrameEditor:

	virtual void ToggleAutoNewFrame();
	virtual boolean AutoNewFrame();
	virtual void DoAutoNewFrame();  // used by import command

	with a DoAutoNewFrame required on OverlayEditor, so OvImportCmd
 	can use it.

	* add AutoNewFrameCmd to call FrameEditor::ToggleAutoNewFrame

	
Script Changes

	* add ivgetjpg.bash script to download JPEG file using w3c, dither
 	its colormap and convert it to ppm using djpeg, and export to
 	import service on a drawing editor using comterp.

	* remove fgrab10.bash and cntsrcheng.bash scripts, because of
 	their lack of general applicability.

	* fix to ivmkmf script when -a not supplied as argument.

Config and Miscellaneous Changes

	* incorporate some of the diffs from patch for Debian package
 	ivtools-0.6.7-1

	* switch the LdPath rule (from config/rules.def) to use IVTOOLSSRC
 	instead of LIBSRC.  Since the LdPath rule is used only to find the
 	original iv-3.1 libraries, this works in more situations,
 	including in a directory set up with ivmkmf.

August 14th 1998  ivtools-0.6.8

Interpreter Changes	

	* add a print func to comterp -- print(fmtstr val) 

	* disable continuation prompting (">") when running comterp from a
 	pipe or socket.

	* add a postfix func to comterp, to display the result of the
 	scanner/parser for debug purposes.  Tokens are printed in postfix
 	order, with each command or symbol followed by a pair of bracketed
 	numbers that indicate the number of arguments and keywords
 	associated with the token, and each keyword is followed by a 1 or
 	0 to indicate if it has an associated argument or not.  For example:
	
	   postfix(func1(a*b :key1 c :key2))                                        
	prints this:
	
           a b mpy[2|0] c :key1(1) :key2(0) func1{2|2} 

	* add a posteval func to comterp, to test out a new mechanism for
 	post-evaluation of a func's arguments, a pre-requisite for
 	implementing conditional control operators.

	* reimplement the cond operator to use post evaluation.

	* experimentally add if, for, and while control funcs to comterp:
	   if(booltest :then thenexpr :else elseexpr)
	   for(initexpr whileexpr [nextexpr] :body bodyexpr)
	   while(untilexpr :body bodyexpr)

Library Changes 

	-- ComTerp --

	* add a new iofunc.c module for the print func.

	* add a new postfunc.c module for the post-evaluations funcs
 	described above.

	* add new methods to ComFunc to support post (or lazy) evaluation,
 	a first step in implementing conditional run-time control
 	operators: stack_arg_post_eval, stack_key_post_eval,
 	skip_arg_on_stack, and skip_key_on_stack.

	-- InterViews --

	* redeclare an ApplicationWindow(Glyph*) constructor to go along
 	with the ApplicationWindow(Glyph*, const char* display)
 	constructor introduced in the last release.  The "display"
 	argument had been defaulted to nil, which made for backward
 	compatibility, but it turns out Target Jr had a copy of the
 	IV-X11/xwindow.c in it source tree, so xcv, the main Target Jr
 	app, wouldn't link without the original ApplicationWindow
 	constructor as well.  This represents a somewhat rare duplication
 	or interface modification of original InterViews sources in either
 	distribution (Target Jr or ivtools) and kind of ironic that we
 	bumped heads over it.  But the workaround was simple.

	* fix segfault in the use of idraw's FileChooser dialog box (for
 	Open and Import).  It was caused by a pointer to a deleted
 	transient window that is saved by the string editor, and when the
 	dialog box is redrawn because of a change in caption, this pointer
 	is used to unmap the window, which fails.  The fix was to create a
 	bodyclear() method on FileChooser and MonoGlyph, so that the
 	internals of the FileChooser could be cleared before the caption
 	is changed which triggers a complete rebuild of the glyph tree.
  	The end result is still as inefficient as it ever was (requiring
 	the complete rebuild of the dialog box for every action), but it
 	works.  And a more efficient implementation can be found in the
 	IVGlyph library's OpenFileChooser class which is used by the rest
 	of ivtools drawing editors.
	
Script Changes

	* add a "make Makefile" to the execution of ivmkmf when -a is not
 	specified.  This snaps the new Makefile to the current directory,
 	which is needed even if "make Makefiles" and "make depend" are
 	not.

Config Changes

	* more configuration changes for Alpha from Bruno Delfosse at
	Thomson-CSF.  Now it has been verified to work.

	* introduction of an experimental configure script and
 	configure.in autoconf file borrowed from Target Jr 3.1 and
 	modified.  Configure options of interest so far that would be
 	specific to ivtools:

	  --with-ace=<path>    Path to ACE
	  --with-ace-libs=<path>    Path to ACE libraries
          --with-clippoly=<path>    Path to clippoly
          --with-clippoly-libs=<path>    Path to clippoly libraries
          --with-fresco=<path>    path to Fresco
          --with-fresco-libs=<path> path to compiled Fresco libs
          --with-x                use the X Window System

	The fresco options would do nothing until some use of Fresco
 	glyphs is made underneath Unidraw or 3.1 glyphs.  The with-x
 	option (should it be without-x?) could be used to build a comterp
 	only version of ivtools.

	The next step is to hook up the two mechanisms of configure and
 	imake.  Right now when you run configure from the top-level
 	directory it executes until it can't find
 	config/"host"-"compiler".mk (i.e. config/linux-gcc.mk).  This
 	seems where the connection between the config/site.def.$CPU files
 	and the config/*.mk files could be made in some fashion.  This
 	represents an opportunity for any party who always wanted
 	InterViews to be auto-configured.

	One thing to note: there needs to be a mapping between the
 	upper-case $CPU convention of InterViews and the lower case
 	os-arch-compiler (or whatever it is) of GNU.  This is an issue
 	when building Target Jr on top of ivtools as well, one that can be
 	worked around by simply using the upper case convention.  But
 	maybe someone else has an idea of a better way to proceed.

July 9th 1998  ivtools-0.6.7

Drawing Editor Changes

	* in drawtool add a "Graylevel Processing" sub-menu to the Edit
 	menu, with a Scale, LogScale, and PseudoColor options.

	* group similar items on the View menu into a submenu for each:
	    - graphic hide/show
	    - viewer chain/unchain
	    - graphic fix/unfix size

	* add an "Enable Looping" and "Disable Looping" to the flipbook
 	Frame menu.  Only works in the forward direction at present.
	
Interpreter Changes	

	* add a 'run' argument to comterp, to run a file of commands and
 	exit.

	* add a createframe(:after) func to flipbook.

Library Changes 

	-- InterViews --

	* add a nil-defaulted argument to the ApplicationWindow
 	constructor, a new X11 display name, i.e. "localhost:0.0".  Tested
 	with a "New Display" command on the View menu of drawtool that is
 	#if 0'd for now.

	-- Attribute --

	* add more type checking methods (both static and otherwise) to
 	AttributeValue (more generic is_integer and is_floatingpoint
 	methods)

	-- Unidraw -- 

	* increment the idraw format version number to 11 to accomodate
 	changes to work better with plotutil.  The only thing changed so
 	far is the addition of closepath's to the postscript output for a
 	circle or ellipse graphic.  Future plans are for adding capstyle,
 	joinstyle, and floating point line widths to the brush
 	description.

	-- UniIdraw -- 

	* fix bug in printing out idraw format version numbers when
 	reading in newer or older versions.

	-- OverlayUnidraw --

	* make the top-level GrayRaster::pseudocolor method calls
 	the lower level GrayRaster::pseudocolor method (instead of the
 	OverlayRaster one).

	* change the low-level GrayRaster::pseudocolor method to do
 	something more reasonable for a floating point image.

	* set up the use of a string-editor dialog box to enter the min
 	and max values for linear and log scaling of grayrasters, and
 	conversion of them to color rasters with a pseudocoloring
 	operation.

	* add blue to the pseudocoloring, going from red to green to blue.

	* create a do-nothing virtual void OverlayEditor::ResetStateVars
 	method that can be filled in by derived OverlayEditor's.

	-- FrameUnidraw --

	* change to support using with frames disabled, for programs
 	derived from FrameUnidraw that don't always need the mechanism.

	-- IVGlyph --

	* evolve the construction of GFieldEditor to be embedded into
 	Page's and boxes equally well.

	* create a StrEditDialog for bringing up a single string editor
	and having the result returned to the application.

	-- OverlayUnidraw -- 
	
	* add a GraphicLoc tool to drawtool.  Displays the position of a
 	pointer click in the local coordinate system of the graphic.
  	Gives the offset in pixels when clicked on a raster.

Script Changes

	* fix pnmtopgm shell script to avoid infinite loop on an empty
	file.

	* add example bash script, fgrab10, that grabs 10 jpeg files from
 	a series of 10 URL's using w3c, converts and dithers them with
 	djpeg, then transfers them to a newly created frame in a
 	separately running flipbook.

	* add example bash script, cntsrcheng, that counts the number of
 	various search engine URL's found in a file of referring URL's,
 	and plots them as a bar plot in comdraw using plotmtv.

Config Changes

	* change the default on InstallRelative in site.def.$CPU to be
	NO.

	* add configuration changes for Alpha from Bruno Delfosse at
	Thomson-CSF.

	* move certain definitions from local.def to site.def.$CPU, so
	that they can be customized in site.def.ALPHA:
	HasDynamicSharedLibraries, SharedCCFlags, SharedCCLdFlags,
	BuildRPCClasses
	
	* generalize ivxt Imakefile to use $CPU

	* temporarily disable the default build and install of ivxt, the
 	example program that shows how to wrap Xt and Motif objects around
 	an InterViews application.  You can bring it back by changing a
 	#if 0 in src/Imakefile to #if 1 and remaking the Makefiles (make
 	Makefiles).

June 5th 1998  ivtools-0.6.6

Overall Changes

	* test and fix rebuild with ACE-4.5 using egcs
	
Interpreter Changes	

	* add a "shell" command to comterp, for executing arbitary Unix
 	commands via system(3).

Library Changes 

	-- TopoFace --

	* add a TopoEdgeList::get_edge method that combines the ::elem and
 	::edge methods into one call.

	* migrate const's from certain method return values in this
 	library to the method itself, which was probably the original
 	intent.

	-- Unidraw --

	* add two inline methods to Graphic, ::ToggleHide
 	::ToggleDesensitize, for programmer convenience.

	-- IVGlyph --

	* add blinkability to NameView text labels.

	-- OverlayUnidraw -- 
	
	* add a public OverlayEditor::IsClean method, to work around the
 	protected Unidraw::IsClean(Editor*) method.

	* fix bug in OvImportCmd::TIFF_Raster.  It was using the wrong
 	variable to construct the resultant OverlayRaster.

	-- GraphUnidraw --
	
	* add the propogation of graphic state to EdgeView::Update, which
 	will include the hide/desensitize mask.


May 19th 1998  ivtools-0.6.5

Documentation	

	* man pages generated from README's for drawtool, flipbook, and
 	graphdraw from Guenter Geiger, (came with the Debian
 	ivtools-0.6.2-4 diffs).

	* set up src/man/man1 directory with dclock.1, iclass.1, idraw.1,
 	and ivmkf.1 copied directly from the corresponding original iv-3.1
 	file (iv/src/man/commands/*.n)

Overall Changes
	
	* fixes required to build on redhat-5.0, glibc, egcs-1.0.2

	* minor diffs gleaned from Debian ivtools-0.6.2-4

Drawing Editor Changes 
	
	* makes -color6 the default for drawtool.

	* change "pipe to command" in export dialog box to read "pipe to
 	filter" 

	* add support for ASCII PGM and PPM files.

Interpreter Changes	

	* fix up the comterp client mode to interpret and
 	handle continuation prompts "> "

	* fix up the comterp telcat mode to simply cat the file without
	expectation of any response.

Library Changes 

	-- Attribute --

	* add BooleanType to output of AttributeValue

	* fix a warning in compiling a program that uses
 	ParamList::add_param_first

	-- ComTerp --

	* have ComTerp::read_expr return false when the parser or scanner
 	had a problem, to partially fix the output of parser/scanner error
 	messages.

	* disable the restoration of _bufptr in a ComTerpServ::run call,
 	because any existing _buffer would be already fully converted to
 	postfix tokens before such a run call was made.

	* fix up the ComterpHandler::handle_input to handle empty lines of
 	input by echoing a \n

	-- OverlayUnidraw -- 
	
	* adds void GrayRaster::graypoke(unsigned long x, unsigned long y,
 	AttributeValue val)

	* adds OverlayRaster* GrayRaster::pseudocolor( ColorIntensity
 	mingray, ColorIntensity maxgray )

	* fixes reading of inlined gray floating point rasters, getting
 	the top2bottom flag right.

	* fix bug in output of readonly components.

	* fix raster import on Solaris

	* changes the boolean function used to detect if a breakout of the
 	Session::read event loop is needed from one that checks only the
 	unidraw update flag, to one that checks both that flag and whether
 	there is anything appended to OverlayUnidraw::_cmdq, a MacroCmd.

	* add a generic GetFrame method at the OverlayEditor level and
 	change EdgeView::InterpretManipulator to use it.

	* make sure an OverlayViewer::Update doesn't get done before an
 	OverlayViewer::Resize

	-- FrameUnidraw -- 

	* take out what seems an unnecesary call to FrameEditor::SetFrame
 	in FrameViewer::Update, because the same thing is done in the
 	proceeding call to FrameEditor::InitFrame.

	-- GraphUnidraw --

	* notify nodes with outgoing edges during edge update

	* fix EdgeUpdateCmd for subclasses of NodeComp.

	-- ComUnidraw --

	* add a BarPlotFunc using plotmtv and a patched pstoedit-2.60 
    	(see http://www.vectaport.com/ivtools/comdraw.html for details).

April 15th 1998  ivtools-0.6.4

	* adds a pnmtopgm.sh script, to convert from pbm (binary) or ppm
 	(color) to pgm (gray-level) image formats.

	* changes from streambuf.h to iostream.h in ComTerp/comterpserv.c
	to fix-up a Debian ivtools work-around.

	* remove bug in initialization of attribute expression dialog box.

	* fix #define's in src/include/std/math.h to use __svr4__ instead
 	of solaris.

	* define a Version 11 idraw PostScript format for the use of the
 	GNU Plotting Utilities (plotutils-2.0).  When finalized it would
 	add support for cap-styles, join-styles, and floating point line
 	widths, to the graphics library underlying idraw and drawtool.

	* adds a GrayRaster::set_minmax method used to set the minimum and
 	maximum numeric value used when mapping onto the minimum (0) and
 	maximum (255) gray-level values.

	* adds a static ParamList* RasterOvComp::get_param_list() to 
	return the list of parameter parsing structures, and a
	ParamList::add_param_first() method useful for overriding a
	default parameter.
 
April 8th 1998  ivtools-0.6.3

New Programs

	* adds an ivxt example program, which demonstrates the
	newly developed embedabbility of an ivtools drawing editor in
	a Motif or Xt applications that uses the Motif or Xt event loop.

Drawing Editor Changes

	* adds "X" as the keyboard shortcut for "Copy Forward" in
 	flipbook, and "Y" for "Copy Backward" (under the Frame menu).

	* adds two bash scripts for generating GIF89A animations from the
 	Print dialog box on flipbook, mkgif89a and mkgif89ac.  See the
 	scripts in ivtools-0.6/src/scripts for more details, or look at
 	http://www.vectaport.com/ivtools/flipbook.html for instructions on
 	how to use them.

	* adds an updated anytopnm sh script to ivtools, which gets
 	installed along with the rest of the binaries, which gets used by
 	the import dialog box when the new "auto convert" button is
 	selected.  Originally from Jef Poskanzer and pbmplus, it tries to
 	figure out what kind of image file has been selected, and convert
 	it to either pbm, pgm, or ppm format.  Doesn't work (yet) for
 	converting ASCII versions of the pbmplus formats to the necessary
 	binary ones.

	* expanded usage documentation for drawtool, flipbook, and comdraw:

	* added -panner_off, -zoomer_off, -slider_off arguments to all three.

	* added -panner_align tl|tc|tr|cl|c|cr|cl|bl|br|l|r|t|b|hc|vc to all three
	* added -toolbarloc l|r to drawtool and flipbook

	* added -help to all three
	
Interpreter Changes

	* adds sorting for the output of the help command in any comterp.

	* add a remote command to comterp, which can be tested by running
 	"comterp remote".  The documentation for this command is:
	
	remote(hoststr portnum cmdstr) -- remotely evaluate command string
 	then locally evaluate result string

	This can be used to run an arbitrary (new-line terminated) command
 	on a remote server (it doesn't have to be a comterp), and read
 	back a (new-line terminated) result that is then evaluted within
 	the local interpreter and the result pushed on the stack.

	* adds a continuation prompt to comterp "> ", for when expressions
 	are detected as incomplete by the parser.  Disabled when running
 	commands from a file.

Glyph Example Changes

	* reinstates the string chooser in the glyphterp example program
 	that lists all predefined commands in the associated interpreter,
 	including all the operators (i.e. "++") which are converted to
 	commands by the underlying scanner/parser (i.e. "incr_before" or
 	"incr_after").

Library Changes

	-- InterViews -- 

	* extends the InterViews Session class to allow for something else
 	(like Motif) to create the Display object, by adding a
 	nil-defaulted Display* argument to Session::init.

	-- Unidraw -- 
	
	* adds a reverse flag to Unidraw's DirtyCmd, to allow it to be
 	used as "CleanUpCmd", i.e. to clear the modified flag in a drawing
 	editor, which in turn causes the Save dialog box not to appear
 	when an editor is quit.

	* moves the PageGraphic class definition from Unidraw/upage.c to
 	Unidraw/upage.h, so that other applications can get at the page
 	size after the page graphic is created.
	
	-- Attribute -- 

	* adds dump method to AttributeList (Attribute/attrlist.h) for
 	debug purposes.  There is also a typedef class AttributeValue _AV;
 	in Attribute/attrvalue.h, to aid in casting in debugger to avoid
 	seeing static class members on ComTerp/comvalue.h when debugging
	the use of ComValue's.

	-- ComTerp -- 

	* adds method to ComTerp to return a sorted list of commands
	added to it.
	
	* makes ComTerpServ's run methods re-entrant by saving then
 	restoring more of the interpreter state,, so that a derived
 	ComFunc can call comterp()->run(...) in its execute() method.

	*add more type test methods to AttributeValue:is_unknown()
	(whether the type is UnknownType), is_known(), and an is_string()
 	which is true for string and symbol.

	* adds a fourth boolean argument to ComFunc::stack_key to always
 	return the third argument as the default, not just as a default
 	for when the keyword is supplied without argument.  In this case a
 	value of true is returned whenever the keyword is supplied without
 	argument.  

	-- OverlayUnidraw --

	* adds these methods to OverlayComp, and the symid version to
 	OverlaysComp:

	virtual AttributeValue* FindValue
        (const char* name, boolean last = false, boolean breadth = false, 
         boolean down = true, boolean up = false);
	
        virtual AttributeValue* FindValue
        (int symid, boolean last = false, boolean breadth = false, 
        boolean down = true, boolean up = false);

	at present only depth-first downward search returning the first
 	value found (prefix) is fleshed out.

	* sets up mixin classes for indexing gs's, point lists, and
 	pictures (compound graphics)

	* uses those classes in OverlayIdrawComp to mix in the indices
 	formerly internal to the class.  

	* creates an alternate to OverlayComp::GetAttributeList,
 	::attrlist(), which returns nil if it doesn't exist, as opposed to
 	creating one. Therefore attribute checking code can be written
 	that never creates an attribute list if one doesn't exist.

	* used OverlayComp::attrlist to add a readonly attribute to a
 	comp.  
	
	* changed all the composite comp ::Definition methods to check for
 	the readonly attribute on their children, and suppress output if true.

	-- FrameUnidraw --

	* allows for the reading in of arbitrary graphics in
 	FramesScript::ReadChildren

Configuration Changes

	* adds an ProjectDir definition to config/site.def.$CPU and a
 	PROJECTDIR make variable to config/params.def.  Now the base
 	directory for all the source packages relied on for the build of
 	ivtools can be set in a single place.  The default is /proj

	* configuration fixes for Solaris 2.6 compilation -- see
 	http://www.vectaport.com/vectaport/solaris-2.6-build.txt for more
 	details.

Bug Fixes

	* fixes bug in OverlayUnidraw (drawtool), whereby duplicated
 	groups (OverlaysComp's with Picture graphics) shared a Transformer
 	between the subject and the view, which effectively disabled the
 	damage repair mechanism whenever the only change to the group
 	graphic was described by a change to the Transformer (i.e. a
 	rotate, scale, move, or stretch).

	* fixes a bug in the export of rasters by pathname in drawtool
 	documents
	

February 26th 1998  ivtools-0.6.2

Drawing Editor Changes

	* conditionally adds a ConvexHull tool to drawtool if qhull from
 	the University of Minnesota Geometry Center can be found via your
 	PATH environment variable.  To acquire and build this separate
 	executable see
 	http://www.geom.umn.edu/software/download/qhull.html

	* adds a "Compute Attributes" item to the Edit menu
 	(SetAttrByExprCmd).  This brings up a dialog box on the current
 	selection, and allows the user to enter an arbitrary attribute
 	value expression and evaluate it.  For example, if a component had
 	an attribute of "likelihood", a new attribute called
 	"likelihoodsquared" could be set with an expression of
 	"likelihoodsquared=likelihood*likelihood".  Keyboard shortcut in
 	drawtool is "#"
	
Interpreter Changes

	* adds these mathematical functions:
	acos, asin, atan, atan2, cos, sin, tan, pow, exp, log, log10

	* adds a min and max function that promotes operands as needed,
 	similar to the other arithmetic operators.

	* adds a cond operator that returns one of two values based on a
 	boolean test.  Pre-evaluates all parameters (like every other
 	current command except help).  In the future there can be "if",
 	"for", and "while" commands that use a lazy, post-evaluation
 	technique.

	* adds a paste command to comdraw, for use in any derived
 	application that builds up a component that needs pasting in the
 	viewer.

Library Changes

	* TopoFace -- adds methods to construct and return a floating
 	point geomobj that reuses the points without duplicating them:

	    FPointObj* TopoNode::point_obj();
	    FMultiLineObj* TopoEdge::multiline();
	    FFillPolygonObj* TopoFace::polygon()

	* OverlayUnidraw --

	- fixes linear scaling and logarithmic scaling of GrayRaster's

	- fixes mechanism for embedding of a graylevel test strip in
 	GrayRaster's

	- adds an edlauncher() mechanism to OverlayEditor to allow for the
 	inclusion of arbitrary editors into the main.c of one specific
 	editor. 

	- adds a comterplist() mechanism to OverlayEditor to manage a
 	global list of registered interpreters.  Allows for one editor to
 	execute expressions on another editor's associated interpreter.

	- adds more mouse documentation lines to OverlayKit

	- adds OverlayViewer ::ScreenToGraphic and ::GraphicToScreen
 	methods, for converting between the x,y of mouse clicks and the
 	coordinate system of a graphic.  Useful for addressing individual
 	pixels of a raster.

	- adds a boolean OverlayKit::bincheck to test for the presence of
 	an executable before relying on it.  Uses OverlayKit::bintest
 	under the hood.

	- mixes in Observer and Observable as multiply inherited base
 	classes of OverlayComp.  Now other update/notify systems can be
 	constructed around and within the subject/view hierarchy of a
 	Unidraw editor.

	* ComTerp -- 

	- clones the above into a ComFunc::bincheck and ComFunc::bintest,
 	for use of generic ComFunc programmers

	- add a new parameter to ComFunc::argcnts, nargskey (defaulted to
 	zero), which is used by ComTerp to inform the func of how many
 	arguments are associated with keywords.

	- add a ComTerp::stack_height() method to tell the current size of
 	the stack.

Configuration Changes

	* sets up drawserv to link in FrameUnidraw as well as
 	GraphUnidraw, and then tests this with a new Editors menu that
 	allows for the launching of other GraphEditor's or FrameEditor's

	* sets up drawserv to be installed with "make install"

	* sets up comterp to use the original Iterator and UList objects
 	from Unidraw, instead of the ALIterator and AList in the Attribute
 	library.  But then, so raw comterp programs won't have to link in
 	all of Unidraw and InterViews, new libraries called
 	Unidraw-command and IV-common were set up to build with only
 	symbolic links to the necessary files:

	IV-common:  listimpl.c, memory.c, regexp.c, resource.c, textbuffer.c

	Unidraw-common:  iterator.c, ulist.c

	* removes the RCS tags from the TIFF source

Bug Fixes

	* fixes a segfault when attempting to import an empty file

	* fixes bug in the mechanism for managing absolute and relative
 	pathnames for drawtool and related documents.

January 23rd 1998  ivtools-0.6.1

Drawing Editor Changes
	
        * clear any error message on the import, export, open, and save-as
 	dialog boxes from previous attempts upon starting a new attempt.

Interpreter Changes

	* add help command that lists available commands by default, or
 	specific information about each command supplied as an argument.  

	* to support the help command the interpreter was evolved to
 	support a lazy-eval command, one that gets invoked before its
 	arguments get computed.  The next release of ivtools should make
 	use of this with conditional and looping commands, the traditional
 	control constructs of procedural programming.
	
Library Changes

	* TopoFace -- add separate methods to attach start and end nodes to
	  an edge: 
	
	      TopoEdge::attach_start_node(TopoNode*);
 	      TopoEdge::attach_end_node(TopoNode*);

	-- and methods to test if a edge starts or ends at this node:

	      TopoEdge::starts_at(TopoNode*);
	      TopoEdge::ends_at(TopoNode*);

	* OS -- add a method to test the table iterator's current entry.
  	helps avoid a nil pointer reference in case of an empty table:

	      TableEntry(Table)* cur_entry();

	* OverlayUnidraw -- fix bugs caught by ElectricFence, including
 	one to the gs-based selection highlighting mechanism of
 	OverlayUnidraw.  Also fix problem with flushing of
 	deferred-loading rasters and save/restore of arbitrary
	numeric gray-level rasters (GrayRaster)

	* ComTerp -- fix bugs caught by ElectricFence, like referencing
 	off the ComTerp stack.  Increase default buffer size on
 	ComTerpServ to 1k.  Change the ";" operator (SeqFunc) to return
 	the second argument on the ComTerp stack.  Add a
 	ComValue::unkval() to return a static ComValue of UnknownType.

	* Attribute -- disable Attribute's call to symbol_del which
 	sometimes inadvertently removes a symbol from the symbol table
 	when an Attribute is destructed.  This needs to be evolved so that
 	either the symbols are never removed after being created, or there
 	is an accurate ref counting done when using ComUtil's symbol_add
 	and symbol_del.  This release also improves the overall memory
 	mgmt of Attribute's, AttributeList's, and AttributeValueList's.
  	Finally, this release adds support for reading in comma-separated
 	list of AttributeValue's (into an AttributeValueList).

Configuration Changes

	* incorporate patches to iv-3.2a published by Randall C. O'Reilly
 	and others of the CMU Psychology Dept., part of the pdp++_1.2
 	distribution.  One thing this does is prefix all the globals in
 	InterViews/coord.h with "iv" (i.e. inch is ivinch, cm is ivcm) if
 	PDP_PLUS_PLUS is defined.  If PDP_PLUS_PLUS isn't defined (the
 	default), these global variables stay the same, but #define's are
 	included which prefix "iv".

	* also incorporate Alpha and Stratus entries for config/arch.def
 	from the pdp++ distribution.  Still probably need the associate
 	iv-*.cf files.

	* change the build order so that ComUnidraw (and comdraw) get
 	built before GraphUnidraw and FrameUnidraw, and then inherit
 	GraphEditor and FrameEditor from ComEditor.

	* incorporate Doug Scott's iv-3.1 event handling patch that
 	enables use of the shift key.

	* remove all explicit e-mail addresses from ivtools for spam
 	protection
	

December 23rd 1997  ivtools-0.6

	* version change

	* renamed Topology library to TopoFace to avoid conflict
	with IUE and Target Jr class libraries of the same name.