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/* $Id: CellContent.txt,v 1.3 2003/10/11 05:36:08 jody Exp $/
Cell Content Jody Goldberg <jody@gnome.org>
Overview
GnmCell is one of the most widely used aspects of Gnumeric. This document
describes the operations and state changes that are available.
Content
location : Cells contain pointers to their sheet, the row, and the column
that contains them. This may change.
value : A GnmValue *. All displayable cells should have a value.
renderedvalue : A placeholder for future use.
parse_format : Expressions store the results of autoformat and values store the
format used to parse the value that was entered.
LifeCycle
When a cell is first created it is initialized to have value_empty and no location.
Actions
- Mark sheet as dirty
- Queue depends for recalc
- Calculate
- Render
- Dimension
- Spans
- Redraw
- link expression to master list
- Update the edit area
- Recalc the auto expression
Future plans
- just in time rendering and span calculation
- span ovelap
- Have spans use run length encoding
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