undo!

[Bernhard Reiter]

Undo certainly is an item on the wish list.
You are completely right in that users (which includes us) like it.

So we only need to resolve the disagreement about you not providing
a patch for undo capabilities. >;-)

On Thu, Jan 20, 2005 at 02:54:54PM -0500, Russell Nelson wrote:
> One more wacky idea: Maybe, instead of saving the session as an XML
> file, it should be saved as a sequence of commands?  Thuban would have
> a command interpreter which would implement changes made to the layers
> and the map.  There would be a command for menu items and any extra
> data submitted with them, e.g. filenames or projection selections.  So
> when you load something, that's a command, or when you set the
> projection, that's a command.  As you do things, the commands are
> saved.  And .... there's an undo/redo facility which issues the
> reverse of the commands.  So if you botched something accidentally,
> you could undo that action.  Anyway, I'm not proposing a patch for
> this, just pointing out that it's one way to implement an "undo"
> facility.  Users like undo because it lets them experiment safely.
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