[Lazarus] Accesing components in FormCreate event

Michael Van Canneyt michael at freepascal.org
Thu Sep 22 07:36:45 CEST 2016



On Wed, 21 Sep 2016, Lars wrote:

> I'm trying to remember if setting up some values of components is okay to
> do in the form create event. From what I remember in Delphi days of
> programming years ago, I think I found out the hard way that setting up
> components in the FormCreate event was a bad idea, and I had to resort to
> tricks like doing it in the FormShow event instead, using a counter to
> only do it on the first show.
>
> Do I recall correctly? Is it bad practice to set up some components on the
> form in the formcreate event, because of timing and issues with the
> components not all being set up in time?  I recall, but cannot be sure,
> that in Delphi this led to issues and bugs where if you accessed
> components on the form in the formcreate event, it was too soon for some
> components as they had not initialized yet. I can't remember for sure
> though, and Lazarus may be different.

No, formcreate is the correct event to set up new components. 
OnShow may be called multiple times in the lifetime of a form.

Michael.


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