Re: Canvas basics

[Jody Goldberg <jody gnome org>]

On Thu, Dec 23, 2004 at 12:17:26AM +0000, Roger Leigh wrote:
> Sorry; I'll try to explain a little more clearly.
>
> Gnumeric displays a grid of cells in the canvas; the canvas itself is
> in a ScrolledWindow.  The column and row labels (A-Z and 0-nnnn) are
> also in the canvas, but these don't scroll with the rest of the sheet;
> they stay fixed along the top and left edges.  If they behaved like
> the other canvas items, they would scroll off the top so you couldn't
> see them, so they are always visible.  I'd like to mimic this with the
> headings on my canvas, but I don't know how Gnumeric achieves this.

We cheat :-)
There are 3 canvases for basic operation.
1 for the grid
1 the col header
1 the row header

When there are frozen panes we can have up to 4 canvases for the
grid.