Ok, fixed the problems with the bounds in the ItemCursor,
but i still cant get events after I do a gnome_canvas_grab
for the case of the dragging selection.

Work on the clipboard

Ok, finally got recalculation working as it is supposed to work.

This piece of code is so clean that it was actually a clean fix :-)

Autocalc works (but I managed to break the recursive detection
stuff, will fix that tomorrow).

Quick-computations on the selected area (like Excel) works with
different user-selectable functions.

Fixed the horrible crash due to not removing my strings from the
hash table ;-)

Miguel

It autocalcs!

My technique is incredibly cool!  The engine should support
most excel features for recursive computations (we just need
the dialog boxes now).

It still has a wierdo crash from a mismatched string ref/unref
but that is going to be trivial to fix.

Next step:  Functions in Perl.

Today it probably does not compile, but I have to leave now.

This is basically the framework for getting computations working.

My current approach is to register areas of interest for a cell.
This is not perfect, but good enough:

	The idea is to walk the expression tree and look for
	cell references (cell references or ranges) and register
	those areas of "interest" for a cell.

	When a new text is entered into a cell, the "regions" of
	interest list is checked and if a match is found, then
	the cells on that region of interest are queued for
	recomputation.

Of course, I do not know yet how to handle the recursive references.

One option is to keep a counter (that starts at zero) during
recomputation, ie something like:

eval_cell (Cell *cell)
{
	cell->use_count++;
	if (cell->use_count > threshold)
		return "Cycle too depth";
	...
	on value lookup:
		eval_cell (cell);
	...
	cell->use_count--;
}

More GNOME vaporware code.

I am actually commiting empty files, just to increase our line
count.

Miguel.

Lots of work as usual :-)

Cell lookup is still broken.
More functions!  COUNT, AVERAGE, AND, OR.

Changed the function framework: it is now easier to write
functions that take multiple arguments.

Added some documentation on writing functions.

Miguel.

Lots of things today:

- New functions implemented:
	SELECTION(),  SUM(),  IF()

- Autocompute of an expression that applies to the selection.

- Added comparission to the expression grammar.

- Added array values.

Bug fixes as usual and lots other thingies I forget.

Miguel

More changes GUI changes

We got functions today.

Miguel.

1998-07-30  Federico Mena Quintero  <federico@nuclecu.unam.mx>

	* src/sheet.c (canvas_bar_realized):
	* src/gnumeric-sheet.c (gnumeric_sheet_realize): Neat X hack:  set
	the window backing pixmap to NULL, so that the window does not get
	cleared when it receives an exposure event.  It will just leave
	whatever bits were on the window when the expose happened.  This
	allows us to avoid flicker.  *** MIGUEL, LOOK AT THIS ***

	* src/gnumeric-sheet.c (gnumeric_sheet_make_cell_visible): Fixed
	width/height confusion (cut&paste bug).

	* src/sheet.c (new_canvas_bar): Set outrageously big scrolling
	limits.  This has to be fixed to use the real sheet's dimensions.
	(sheet_new): Use correct table expansion parameters.

1998-07-30  Federico Mena Quintero  <federico@nuclecu.unam.mx>

	* src/sheet.c (sheet_set_zoom_factor): Use gnome_canvas_scroll_to().

	* src/gnumeric-sheet.c (gnumeric_sheet_set_top_row): Scroll using
	gnome_canvas_scroll_to().
	(gnumeric_sheet_set_top_col): Likewise.
	(gnumeric_sheet_make_cell_visible): Get the offsets using
	gnome_canvas_get_scroll_offsets().
	(gnumeric_sheet_make_cell_visible): Use gnome_canvas_scroll_to().

1998-07-30  Federico Mena Quintero  <federico@nuclecu.unam.mx>

	* src/gnumeric-sheet.c (gnumeric_sheet_color_alloc): Query the
	colormap with gtkdget_get_colormap(), because the canvas structure
	no longer has a colormap field in it.
	(gnumeric_sheet_set_top_row): Use the canvas layout adjustment to
	scroll.
	(gnumeric_sheet_set_top_col): Use the canvas layout adjustment to
	scroll.
	(gnumeric_sheet_make_cell_visible): Get the values from the canvas
	adjustments.

	* src/sheet.c (new_canvas_bar): Call gnome_canvas_new() correctly.
	(scroll_to): New helper function to scroll a canvas.
	(sheet_set_zoom_factor): Use scroll_to().

	* src/gnumeric-sheet.c (gnumeric_sheet_create): Do not call
	gnome_canvas_construct() at is does not exist anymore.
	(gnumeric_sheet_new): Use outrageously big values for the canvas
	scrolling region, for now.  This needs to be fixed.
	(gnumeric_sheet_make_cell_visible): Use the canvas layout
	adjustment to scroll.

1998-07-30    <miguel@nuclecu.unam.mx>

	* src/parser.y (alloc_clean): Free the record that tracks the
	allocation records.
	(alloc_clean): Handle Strings.
	(alloc_list_free): New function: cleans up the allocation list.

	* src/gnumeric-sheet.c (gnumeric_sheet_load_cell_val): Fix to use
	the new Strings.

	* src/cell.h: Use the new Strings instead of the Symbols.  That
	was just a stupid idea.

	* src/str.c (string_ref): New file:  Implements string sharing.

	* src/symbol.c (symbol_install): Use our copy of the allocated key
	when installing the symbol.

1998-07-29    <miguel@nuclecu.unam.mx>

	* src/symbol.c (symbol_unref_ptr): New function that does symbol
	unreferencing and if the reference count reaches zero, it also
	sets the value pointed to NULL.

	* src/sheet.c (cell_set_text): Release evaluation tree after
	entering new contents in a cell.

	* src/sheet.h (Cell): We now keep all of the character information
	as refcounted Symbols.

	* src/expr.c (eval_node_release): Renamed and made static.  New
	allocation strategy: EvalTree's top node are now refcounted to
	simplify cell duplication.
	(eval_expr): Now it takes column and row arguments for evaluating
	the expression in that context.
	(expr_parse_string): Same.

	* src/parser.y: Renamed EvalNode to EvalTree.
	(return_cellref): CellRefs now contain offsets relative to the
	current column/row if the references are not absolute.

	* src/gnumeric-sheet.c (gnumeric_sheet_make_cell_visible): Use new
	helper routines for doing the scrolling.  Scroll vertically.
	(gnumeric_sheet_set_top_row, gnumeric_sheet_set_top_col): New
	routines for keeping the contents of the canvas and the bars in
	sync.
	(gnumeric_sheet_new): Take the ItemBars for the columns and rows
	as a parameter now.

	* src/sheet.c (sheet_select_all): New routine: select the complete spreadsheet.

	* src/item-bar.c (item_bar_class_init): Signal now takes an extra
	argument which indicates the beginning of a column selection.

	* src/sheet.c (sheet_selection_col_extend_to,
	sheet_selection_row_extend_to): New methods for implementing the
	extending column and row selection.
	(sheet_row_selection_changed, sheet_col_selection_changed): Now
	they use the new parameter to start the selection.

* Sync some i18n bits...

syncetysync

1998-07-27  Miguel de Icaza  <miguel@nuclecu.unam.mx>

	* src/main.c (main): Rename currentWorkbook to current_workbook,
	so that it follows the style of the rest of my code ;-)

	* src/item-cursor.c (item_cursor_init): Add a timeout handler for
	drawing the anted animation.
	(item_cursor_set_bounds): Setup the Canvas Item bounding box when
	the bounds of the cursor change.

	* src/gnumeric-sheet.c (start_cell_selection): Create the
	selection cursor at the same position the regular cursor is.

	(gnumeric_sheet_init): Share colors between items and the canvas.

Weee!  Regular strings are now treated as values (so they
can be used in cell expressions).  This means you can actually
start typing expressions and they will actually make sense
(note that no recalc is yet supported).

The code to do interactive selections is there, but for some
reason the cursor is not paying much attention to me.

This feature lets you select a cell for an expression if you
type in a formula in the spreadsheet (just type '=' and use
the arrow keys to see my buggy code).

Sat Jul 25 14:10:23 1998  Tom Tromey  <tromey@cygnus.com>

	* src/Makefile.am (test_parser_LDADD): Added INTLLIBS.
	(test_format_LDADD): Likewise.
	(check_PROGRAMS): Renamed from noinst_PROGRAMS.

	* src/format.c (do_roundup): Renamed from roundup (my Linux
	install has a 2-argument `roundup' macro in sys/types.h).  Now
	static.

Don't know why it thinks stamp-h.in is changed. Oh well...

More work.