What is new in Tablelist 3.0?
-----------------------------

The main new feature provided by this release is the support for
interactive cell editing (thanks to Juri Shimon, Dr. Johannes-Heinrich
Vogeler, and Jeff Godfrey for their proposal).  The first three items
below are related to this subject:

1. New configuration options "-editstartcommand" and "-editendcommand".

2. New column and cell configuration option "-editable".

3. New subcommands "editcell", "entrypath", "cancelediting", and
   "rejectinput".

Further changes:

4. New subcommands "seecolumn" and "seecell".

5. Tabulator and newline characters are now retained in the internal
   list, displayed as "\t" and "\n", and supported by interactive cell
   editing (thanks to Jacek Jenrysik for his query concerning multi-
   line items).

6. The redisplay and sorting of tablelist items have become
   dramatically faster (thanks to Matt Becker for his input that
   determined me to optimize these operations, and also for his
   testing).

7. Further performance improvements (thanks to Patrick Fradin for his
   valuable contribution).

8. The option values displayed by the demo script "config.tcl" can now
   be edited interactively.

9. Minor improvements in the code and documentation.

What was new in Tablelist 2.8?
------------------------------

1. The trailing or leading ellipsis ("...") used when displaying the
   elements that don't fit into their cells can now be replaced with an
   arbitrary string specified with the aid of the new "-snipstring"
   configuration option (thanks to Tore Morkemo for his proposal).

2. New value "none" for the "-activestyle" configuration option.

3. When exporting the selection, the elements of the hidden columns are
   now skipped and the contents of the visible cells are transformed
   according to the value of the "-formatcommand" option for the
   corresponding columns.

4. Improved and simplified the focus control (thanks to Juri Shimon and
   Gopal Reddy for their bug reports).

5. Further minor code improvements.

What was new in Tablelist 2.7?
------------------------------

1. Increased the speed of the "insert" and "insertlist" subcommands as
   well as that of item insertions with the aid of the "-listvariable"
   option by a factor of about 1.3.  The "insert" subcommand is now
   about 2.3 times faster than in version 2.4.  Compared to version
   2.4, item insertion with the aid of the "-listvariable" option has
   become more than 10 times faster.

2. The number of pixels by which a column is stretched is now
   proportional to its width in pixels.  Based on this change,
   significantly improved the stretching behavior after an interactive
   column resize operation (thanks to Mats Bengtsson for his valuable
   suggestions).

3. Fixed a bug in the "-(label)font" and "-labelborderwidth"
   configuration options, introduced in version 2.5 (thanks to Bastien
   Chevreux for his bug report).

4. Fixed a bug in the "columncget", "rowcget", and "cellcget"
   subcommands, introduced in version 2.3 (again, thanks to Bastien
   Chevreux for reporting this bug).

5. Fixed a bug in the binding scripts for the binding tag
   "TablelistBody" (thanks to Miguel Bañón for his bug report).

6. Applied a patch proposed by Jeff Adamczak that works around a bug in
   the "lsort" command, present in Tcl versions 8.0 - 8.3.2.

7. Applied a patch proposed (in a slightly different form) by Mats
   Bengtsson that works around a bug in the "info script" command on
   the Macintosh.

8. Further minor code improvements.

What was new in Tablelist 2.6?
------------------------------

The only change in this version is a bug-fix eliminating a rather nasty
bug in the "insert" and "insertlist" subcommands, introduced in the
previous release.  Thanks to Mats Bengtsson for his bug report and to
Jeffrey Hobbs for suggesting me to bump the version number to 2.6.

What was new in Tablelist 2.5?
------------------------------

1. Increased the speed of the "insert" subcommand by a factor of about
   1.8 and that of item insertions with the aid of the "-listvariable"
   option by a factor of about 8.  (These figures are based on speed
   measurements made with two tablelist widgets: one having 1000 rows
   and 10 columns and another one with 5000 rows and 20 columns.)

2. The "delete", "sort", and "sortbycolumn" subcommands, as well as row
   and cell updates with the aid of the "rowconfigure" and
   "cellconfigure" operations have also become significantly faster.

3. New "insertlist" subcommand.

4. New "-stripeheight" configuration option (thanks to Gregory Samoluk
   for his proposal).

5. If no columns are to be stretched then the blank space following the
   header labels is now filled with a dummy, insensitive label having
   the same background, borderwidth, and relief as the "normal" header
   labels.

6. Fixed a bug concerning the placement of the arrow indicating the
   sorting order (thanks to Robert Minichino for his bug report).

7. Improved the handling of header labels with embedded images, to
   eliminate some peculiarities experienced on Windows.

8. Several further improvements and minor bug fixes.

What was new in Tablelist 2.4?
------------------------------

1. New column configuration option "-formatcommand" (thanks to Jeff
   Godfrey for his proposal).  This option is now used in the demo
   script "browse.tcl".

2. New row configuration option "-selectable" (thanks to Tore Morkemo
   for this proposal).

3. Significantly improved the performance of the row and cell updates,
   as well as of the "delete" subcommand (thanks to Emanuele Lupi for
   her input that determined me to optimize these operations).

4. The widget implementation is now fully compatible with the recent
   changes made in Tk 8.4a4 (thanks to Patrick Fradin for his input).

5. Pop-up menus as children of a tablelist widget cause no problem any
   longer (thanks to Andres Garcia and Bastien Chevreux for reporting
   this bug, introduced in the previous release).

6. Fixed a bug caused by the delayed redisplay after changing the
   number of columns (thanks to Tore Morkemo for his bug report).

7. Minor improvements in the code and documentation.

What was new in Tablelist 2.3?
------------------------------

1. New configuration option "-activestyle", enabling to surround the
   active item with a frame instead of underlining it.

2. The columns can now be separated with borders, by making use of the
   new configuration option "-showseparators".

3. A nice distinguishing effect for the rows can now be obtained with
   the aid of the new configuration options "-stripebackground" and
   "-stripeforeground".

4. New tablelist widget subcommands "separatorpath" and "separators".

5. Fixed a bug related to the column index if the header labels are
   hidden (thanks to Emanuele Lupi for her bug report).

6. New demo script "styles.tcl", showing several ways to improve the
   appearance of a tablelist widget.

7. The demo scripts "config.tcl" and "browse.tcl" now make use of the
   new "-stripebackground" option.

8. Numerous further improvements and minor bug fixes (thanks to Patrick
   Fradin for his valuable input).

What was new in Tablelist 2.2?
------------------------------

1. The "-font" configuration option can now be specified at column,
   row, and cell level, too (this was proposed and partly implemented
   by Patrick Fradin).  The data will be aligned properly, no matter if
   the fonts are of different sizes.

2. Significantly improved the performance of the Tcl command associated
   with a tablelist widget, especially that of the "delete", "sort",
   and "sortbycolumn" subcommands for a large number (i.e., several
   thousands) of items.

3. Corrected the creation of the arrow indicating the sorting order, to
   make sure that it works under all supported Tcl/Tk versions (thanks
   to Juri Shimon and Andres Garcia for their bug reports).

4. Several improvements in the demo scripts "config.tcl" and
   "browse.tcl".  Among others, the GUIs generated by these scripts now
   have a better platform-specific look & feel (many thanks to Mats
   Bengtsson for his valuable suggestions concerning the Macintosh
   platform).

5. Further minor improvements in the code.

What was new in Tablelist 2.1?
------------------------------

1. The up- or down-arrow indicating the sorting order now has a 3-D
   border, giving the arrow a sunken relief.

2. Due to the new 3-D look of the arrow, the default values of the
   "-arrowcolor" and "-arrowdisabledcolor" configuration options have
   been changed to an empty string, indicating that the arrow will
   inherit the background color of the label in which it is placed.

3. Several improvements in the demo script "browse.tcl".

4. Minor improvements in the code and documentation.

5. The distribution file "tablelist2_1.zip" for Windows now includes
   the "tablelist2.1" directory, hence it is no longer necessary to
   create this folder before unpacking the distribution file (thanks to
   Kevin Partin for this suggestion).

What was new in Tablelist 2.0?
------------------------------

1.  New cell configuration option "-image", used to set and retrieve
    the image to be displayed (by itself or together with a text) in a
    cell of a tablelist widget.

2.  New column configuration option "-labelimage" specifying the image
    to be displayed (by itself or combined with a text) in a column
    label.

3.  The alignment of a header label can now be defined to be different
    from that of the elements contained in its column, by using the new
    column configuration option "-labelalign".

4.  Renamed the column configuration option "-justify" to "-align",
    because (at least in the case of the header labels) this actually
    specifies not only the justification, but also the anchor point.
    Hopefully, this POTENTIAL INCOMPATIBILITY will not break too many
    existing applications, because the column alignments are usually
    specified within the "-columns" global option.

5.  Fixed a bug that raised an error when some configuration options
    were specified at widget creation time before the "-columns" option
    (thanks to Bastien Chevreux for his bug report).

6.  Reverted the implementation of the focus control to that contained
    in the pre-1.6 Tablelist releases, because its simplified version
    from the last release failed to work as expected if a tablelist was
    the only widget taking the focus during keyboard traversal (thanks
    to Juri Shimon for his bug report).

7.  Fixed a bug that caused an erronous return value of the "labels"
    subcommand if the arrow indicating the sorting order was displayed.

8.  Several performance improvements, kindly contributed by Patrick
    Fradin.

9.  To improve the performance even further, the invocations of "info
    exists" for array elements are no longer replaced with a call to a
    helper procedure (introduced in Tablelist 1.2), because the Tcl bug
    that made this necessary for Tcl versions 8.2, 8.3.0 - 8.3.2, and
    8.4a1 was fixed in Tcl 8.3.3 and 8.4a2.  If for some reason you
    cannot upgrade your Tcl/Tk version, then you should patch the file
    "tablelistWidget.tcl" with the aid of the script "repair.tcl", as
    described in the files "README.txt" and "tablelist.html".

10. The demo script "browse.tcl" now inserts an image into the first
    cell of each row of the tablelist widget.

11. Numerous further improvements and minor bug fixes.

What was new in Tablelist 1.6?
------------------------------

1. The value of the "-stretch" configuration option is now ignored if
   the width of the tablelist widget was specified as zero or less.
   This change was necessary in order to improve the behavior of
   dynamic-width tablelist widgets with the "-setgrid" option set to
   true.

2. By pressing mouse button 1 over a header label, the label's relief
   is now only changed to "sunken" if the value of the global or
   column-specific "-labelcommand" option is nonempty.

3. Several improvements concerning hidden columns (thanks to Juri
   Shimon for his bug report).

4. Made the focus control more straight-forward.

5. Extended the "How to use it?" section of the tutorial
   "tablelist.html".

What was new in Tablelist 1.5?
------------------------------

This version contains mainly bug fixes and small improvements.  Many
thanks to Andres Garcia, Bastien Chevreux, and Patrick Fradin for their
valuable contributions.

1. Fixed a bug concerning the "-label*" configuration options.

2. Fixed the erronous invocation of "getSubCmd" in the selection
   handler "fetchSelection" (this bug was introduced in version 1.1).

3. Elements that don't fit into their cells are now displayed with a
   trailing or leading ellipsis ("..."), depending on the column
   alignment.

4. Several further improvements and minor bug fixes.

What was new in Tablelist 1.4?
------------------------------

1. New "-stretch" configuration option specifying the columns that are
   to be stretched in order to eliminate the blank space that might
   appear at the right of the table.

2. Improved the error handling in the "attrib", "configure",
   "columnconfigure", "rowconfigure", and "cellconfigure" subcommands.

3. Improved the demo scripts "browse.tcl" and "config.tcl".

What was new in Tablelist 1.3?
------------------------------

1. The "sortbycolumn" subcommand now per default places an up- or
   down-arrow indicating the sorting order into the respective column's
   label.  This can be enabled or disabled with the new "-showarrow"
   configuration option, at both widget and column level.

2. New configuration options "-arrowcolor", "-arrowdisabledcolor", and
   "-incrarrowtype" to control the appearance of the arrow mentioned
   above.

3. New "resetsortinfo" subcommand, used to reset the information about
   the sorting of the items.

4. Improved the demo script "browse.tcl".

5. Further improvements in the code and documentation.

What was new in Tablelist 1.2?
------------------------------

1. Whereever possible, eliminated the invocations of "info exists" for
   array elements.  This works around a severe bug in Tcl versions 8.2
   and 8.3 (fixed in 8.4a2), which causes excessive memory use when
   calling "info exists" on a non-existent array element.  Some serious
   memory leaks in earlier Tablelist versions when run under Tcl/Tk 8.2
   or 8.3 (reported by Henning Hanusa and Christian Burrini) could be
   tracked down to this very annoying Tcl bug (which I was not aware of
   until recently).

2. The help variables used in the initialization of the "tablelist"
   namespace are now declared with the "variable" keyword, in order to
   avoid any conflicts with global variables.

3. Improved the parsing of configuration and command options.

What was new in Tablelist 1.1?
------------------------------

This version contains mainly bug fixes and small improvements.  Many
thanks to Patrick Fradin, Bastien Chevreux, and Mats Bengtsson for
their valuable contributions.

1. Fixed some bugs in the implementation of the "-listvariable" option.
   Also, the value of this option can now be an array element, not only
   a scalar variable.

2. Fixed a bug in the implementation of the "get" subcommand.

3. New "sortcolumn" and "sortorder" subcommands to query the arguments
   of the last sorting.

4. Improved the look & feel of tablelist widgets on the Macintosh.

5. Worked around a bug in Tk 8.3.0 (fixed in 8.3.1) concerning listbox
   widgets with configured "-cursor" option.

6. Several further improvements and minor bug fixes.

What was new in Tablelist 1.0?
------------------------------

1.  New "-resizable" option for the "columnconfigure" subcommand.

2.  New "labels" subcommand. returning the list of the header labels.

3.  The "-disabledforeground" and "-state" configuration options no
    longer require Tk version 8.3 or higher.

4.  All "-label*" column configuration options can now have an empty
    string as value, meaning that the corresponding global option will
    be used instead of the column-specific one.

5.  Improved the output of the "columnconfigure" subcommand.

6.  The help variables used in the coordinate transformations within
    the scripts defined for the "TablelistBody" binding tag have been
    moved into the "tablelist" namespace, in order to avoid any
    conflicts with global variables.

7.  Improved cross-platform support with the aid of the new <<Button3>>
    virtual event.

8.  Fixed a bug in the "compareAsSet" procedure of the demo script
    "config.tcl".

9.  New demo script "browse.tcl", containing a simple widget browser
    based on a tablelist.

10. Both demo scripts now use a namespace for their procedures, to
    avoid any conflicts when evaluating them with the "source" command.

11. The tutorial "tablelist.html" is now completed and includes a
    detailed discussion of both demo scripts mentioned above.

12. Numerous further improvements in the code and documentation.

What was new in Tablelist 0.9?
------------------------------

1. The documentation now includes the tutorial "tablelist.html" (part
   of which is still work in progress), as well as reference pages for
   the two exported commands "tablelist::tablelist" and
   "tablelist::sortByColumn".

2. The "-listvariable" configuration option is now fully implemented.

3. A column of a tablelist widget can now be made invisible by using
   the new "-hide" option of the "columnconfigure" subcommand.

4. The contents of a row can now be updated with the new "-text" option
   of the "rowconfigure" subcommand.

5. For Tk versions 8.3 or higher the "tablelist::tablelist" command now
   supports the "-disabledforeground", "-labeldisabledforeground", and
   "-state" configuration options.

6. Replaced "[focus]" with "[focus -displayof $win]", so that the code
   will work properly in applications using multiple displays.
   Similarly, the "font measure" command is now invoked with the
   "-displayof $win" option.  This also works around a peculiarity of
   the "font measure" command.

7. Renamed "tablelistBindingTag" to "Tablelist".

8. Fixed a bug in the private procedure "colIndex", for arguments of
   the form "@x,y".  This procedure is invoked (directly or indirectly)
   in the implementation of all commands that take a column or cell
   index or an x coordinate as argument.

9. Numerous further improvements and minor bug fixes.
