$Id: VERSIONS,v 1.74 1998/10/25 23:40:28 cthulhu Exp $

VERSION 0.9.13

Fixed bug when importing text files.
Cut option in standard toolbar should now work.
Added Cut to edit menu.
Sorting no longer deletes selection.
Autosum doesn't allow summing of whole columns and rows - an error is now 
	displayed.
Moved auxiliary functions from tcl_interf.cc to interf_aux.cc.

VERSION 0.9.12

Fixed bugs in scan.l that caused the abacus not to compile on some machines -
	thanks to Adam Richter for the patch.
Makefiles now use a single options file that all others import so users can
	change build variables easily. Plus (another) makefile cleanup was
	done.
Fixed bugs in scan.y that made bison scream.
Fixed bug dealing with references bigger than 256 rows.

VERSION 0.9.11

Fixed bug when deleting cols or rows bigger than max_col or max_row.
Fixed bug with graphs not handling row/col deletion properly.
Graph loading is now done through a list rather than a glob of /graphs dir.
Fixed div by zero error when drawing graphs with total data values adding upto
	zero.
The Abacus is now oficially GPLv2.

VERSION 0.9.10

Fixed row deletion bug.
Updated webpages for new pre-alpha release.
Created INSTALL file.

VERSION 0.9.9

Another ScrollFraction checkarg.cc error fixed...
Paste should now work - PasteSpecial removed and merged with old Paste.
Weblink on help menu points to Berkeley instead of INESC.

VERSION 0.9.8

Fixed ColWidth and ScrollFraction checkarg.cc error.
Fixed Undo / Redo bug dealing with wrong cell reference manipulation.
Copy and Paste now work more nicely with helpmessages, and the globalstates
	copyConfirm and moveConfirm are now treated like normal state - i.e.
	the user can edit normally while confirming moves/pastes.
Fixed Graph undo - once again checkarg.cc errors...

VERSION 0.9.7

Added directories to display/io.tcl so user can browse through dirs instead
	of just current dir.
Graph creation optimized for col and row selection to speed up drawing.
Helpmessage for graph edition and deletion so it should be more intuitive.
Optimized Copy and Paste for col and row selection.
Fixed move - now works with col and row selection, plus added help message.

VERSION 0.9.6

Fixed Makefiles.
Code cleanup.

VERSION 0.9.5

Open Save Dialog Boxes allow directories browse.
Some user Interface minor changes were added.

VERSION 0.9.4

Added autosave.
It is now possible to run macros in a sheet, even thought recording is not yet
	available.
Help system - on-line docs, man page and tooltips plus nicer message display
	area.
Find and Replace.
Lots of user interface changes, mostly details scattered everywhere.
Update to version 8.0.3 - people with 8.0.0 can still use old canvas code.

VERSION 0.9.3

Fixed evaluation bug.

VERSION 0.9.2

Minor details.

VERSION 0.9.1

Released alpha version of Abacus.

VERSION 0.9.0

Switched maintainer from aml to ajr and vma
Ported to tcl/tk 8.0
First attempt at graphics
Name switch to Abacus
Cell sorting now works
Toolbar fully functional (Autosum and Function menu)
Import/Export CSV
Undo/Redo
Column/Row selection

VERSION 0.8.24

Fixed bug in row height setting.
Fixed bug in composite character insertion.
Inserted check in exp and power functions.

VERSION 0.8.23

Started implementing graphs.
Fixed bug in tkCanvasPs.c
Created bindings for composite characters in Portuguese.

VERSION 0.8.22

Print settings now are saved to file.
Fixed buggy error message when loading sheets.

VERSION 0.8.21

BAD_REF error in place.
Unary minus done.


VERSION 0.8.20

Error propagation for formulas fixed.
Edit operations in place.

VERSION 0.8.19

Fixed unsufficient range of colunm width.
First cut of vlookup and hlookup functions.
Fixed bug in display routines.

VERSION 0.8.18

On-demand calculation improved. Loops are detected.
Automatic recalculation can now be disabled.
Printing was improved.

VERSION 0.8.17

Sumif implemented. 
Diverse time functions implemented.
Fixed needtoscroll2 to avoid out of control scroll.

VERSION 0.8.16

First cut at transforming canvas into a true cell widget.
Text, lines and rectangles are now relative to row and colunm numbers.
It still has a bug with wrong estimation of column widths.

VERSION 0.8.15

We can now save visibility status of cell borders.

VERSION 0.8.14

Print preview. Improvements on print command.

VERSION 0.8.13

First cut of full print.

VERSION 0.8.12

First cut at error handling. 
Date formats are in.
Fixed problem with blank cell drawing.

VERSION 0.8.11

Created row and column insert.
Fixed small problem with display of vergrown cells.

VERSION 0.8.10

Fixed problems with copying of cells with non-default formats.
Created printing formats, alignment formats.
Format toolbar now reflects format of active cell.

VERSION 0.8.9

Some performance problems addressed by reducing tag use.
Several performance problems remain when heavy use is made
of borders and shading in large spreadsheets. 

VERSION 0.8.8

Rulling and shading.
Optionally hide cell borders.
Works well, but is very slow for large spreadsheets.

VERSION 0.8.7

Created cell shading.

VERSION 0.8.6

Fixed double redrawing of sheets that was taking place.
Fixed a item reference problem when the sheet is redrawn.
Fixed misplacement of row labels.
Created first version of format toolbar.

VERSION 0.8.5

Cell fonts created, loaded and saved.
Row height created.

VERSION 0.8.4

Fixed problem with initialization of formulas.
Insertion in entry is now done properly.
Focus is slightly better handled.
Fixed serious problem when canvas changes name and old 
references exist. Also removed double call to redraw that
was slowing things a lot.

VERSION 0.8.3

Load and save now accept string_value for formula cells.
This fixes previous thought problem of formula values not
being stored.
Functions upper,lower and proper created.
Function if can now return labels.
Fixed problem with function count.
Reasonably stable version, very used to manipulate notas.wk1.


VERSION 0.8.2

First version of regressive tests created.
Changes were made to allow for string functions.
String function upper created. Raises the problem 
that formulas do NOT have a space for string values,
and therefore have to be evaluated upon loading.

VERSION 0.8.1

Function round fixed.
Many other functions added, from power to mod.

VERSION 0.8.0

Fixed problem with several sheets. Each canvas now has its own 
canvas info.
Fixed scroll up and down. Implemented max_row and max_col.
Fairly stable version.

VERSION 0.7.9

Scroll almost fixed. We are missing scroll steps.
Several sheets work again, but need to be fixed right.

VERSION 0.7.8

Top window resizing now works well.
Range selection now uses a filled rectangle with overall good results.
Intermediate version, does not work well.

VERSION 0.7.7

Fixed a few small problems with variable sized columns caused by 
messing around with the canvas widget.

VERSION 0.7.6

Changed canvas widget to handle special items like cell borders.
Seems to work well. Spreadsheet size is no more limited now.

VERSION 0.7.5

Changed a few things in the definitions of formulas in gram.y.
Need to change something in function @count.

VERSION 0.7.4

Created formats for cells.
Load cell now makes copy of old file.

VERSION 0.7.3

Inserted check and delete button.
Font selection widget created.
Fixed bug canvas_information destructor.

VERSION 0.7.2

Data structures for ordered scans of rows and columns are in place.
Cell overlap is working.
Forward cell dependences inserted. Automatic recalculation created.
Uniformizaed label entry procedure.

VERSION 0.7.1

Sped up scroll functions, caching keys presses.
First cut at handling overflowing cells.
Overflow into ajoining filled cells not solved.

VERSION 0.7.0

First cut at speeding up canvas critical functions.
CanvasWidgetCommand is now called directly from draw_sheet.
Fixed bug in reading values from datafiles. Also works 
for Suns now.
Created canvas directory, replacing builtin command canvas.

VERSION 0.6.9

Changed key based scrolls to be synchronous. Work fine, but are somewhat slow.
Fixed abnormaly in state machine after range defition causing canvas scroll.
Solid, working version.

VERSION 0.6.8

Made redraw more efficient by removing at once all cells before redrawing.
Fixed problem with unsufficient definition of logical expressions.
Added >=, <=, <>, @and and @or functions.

VERSION 0.6.7

Improved print controls.

VERSION 0.6.6

Fixed problem in string_single_arg macro
Created if function, boolean evaluations and so on.

VERSION 0.6.5

Created print range ability.
Set in gray non-working menus.
Created RangeKill command.
Created round function and macros for single argument functions.

VERSION 0.6.4

Improved user waiting times during redraw and loads by calling update.

VERSION 0.6.3

Stack references are now pushed instead of double value.
Fixed problem with integers too large on formulas.
Scroll with cursors now works better.

VERSION 0.6.2

Fixed abnormality with mouse click.
Variable width columns implemented, but not yet saved.
Labels are now a lex element, fixing some aberrant behavior that existed.

VERSION 0.6.1

Improved user interf state machine.
Centralized range definitions.
Range defined outiside current view work properly.

VERSION 0.6.0

Fixed a memory bug in formula copy with purify.
Fixed a few minor bugs. Functional, stable version.

VERSION 0.5.10

Fixed problems with change to elf.
RangeCopy created. Works !
Pressed mouse leaving canvas will cause scroll. Works, but needs to 
keep moving.

VERSION 0.5.9

Fixed bug with range definition via mouse.
Fixed bug in range iterators.

VERSION 0.5.8

Went trough purification. Cell and formula allocation now work.
Load still doesn't go through on Suns.

VERSION 0.5.7

User interface for cell and range copy created.
Improved user interface state machine when entering and viewing cells.
Fixed unaligned accesses during formula parsing and io operations.

VERSION 0.5.6

CellCopy created.
CellGet fixed.
Tcl range operators created.
User interface improved. Cell references and ranges 
can now be defined with the mouse.

VERSION 0.5.5

Range iterators created.
Functions sum, max and min now work properly.
Negative numbers now allowed by flex (oops :-)

VERSION 0.5.4

Fixed limited integer range of cells.
Fixed incorrect code in spreadsheet type.
Users interface improved. Cursors and mouse clicks
now work in the most basic modes.

VERSION 0.5.3

Load, save, open, close and exit now work properly (hopefuly).
Sheet utility functions also work : SheetExists, SheetEmpty, SheetModified

VERSION 0.5.2

Sheet::save and Sheet::load created.
Program can now write and read wk1 files.
Slight changes made to relative references. Bit 14 is now always 0.

VERSION 0.5.1

Cell references evaluated.
Spreadsheet is recalculated at every change, by an arbitrary order.
Reformulated program structure. Evaluation and reverse parsing
are member functions of Sheet.

VERSION 0.5.0

Range references parsed and reverse parsed.

VERSION 0.4.9

Absolute and relative references to cells introduced.
They are parsed and reverse parsed, not yet evaluated.

VERSION 0.4.8

Formula compilation, evaluation and decompilation now work.
Cells can be of type label, numerical formula or numbers.

VERSION 0.4.7

Fixed make dep at top level Makefile
First cut of formula compilation.
Integers and floating point numbers now working.
Created files rpn.cc, rpn.hh and wk1.hh in the calc directory.

VERSION 0.4.6

Created skeleton to merge calculation engine

VERSION 0.4.5

Fixed toplevel Makefile to include RCS control at top level


VERSION 0.4.4

First draft of Sheet::display 

VERSION 0.4.3

Changes to Makefile

VERSION 0.4.2

Created user interface state machine.

VERSION 0.4.1

Created main program xxl
Moved things around a bit

VERSION 0.4

Messed around with Makefiles at the top level

VERSION 0.3

Created hierarchical Makefiles
Created Sheet and Cell classes