[Lazarus] Undo for Form Designer

Zaher Dirkey parmaja at gmail.com
Fri Jan 1 09:05:56 CET 2010

On Thu, Dec 31, 2009 at 5:37 PM, JoshyFun <joshyfun at gmail.com> wrote:
> Hello Lazarus-List,
> Thursday, December 31, 2009, 4:08:11 PM, you wrote:
> MG> Notes:
> MG> Changing a property (e.g. Left) changes some other properties too and
> MG> there is no hook. So for undo you must store the whole form plus the
> MG> descendant forms plus the referenced forms plus the source changes. This
> MG> costs much time and memory. For example with some images you easily get
> MG> a megabyte.
> MG> So it would be unwise to create an undo step on every change.
> It would be great to at least have 1 step undo, specially when you try
> to delete a visual object but the selected one is the container ;) Or
> maybe a container delete with objects inside should raise some kind of
> warning ?

Only undo for Delete, Move, Size is enough with more than 1 steps.

Zaher Dirkey

More information about the Lazarus mailing list