Re: Supporting SDI & MDI

tomconlon7777777 wrote:

> Hi All,
>
> Does anyone have any tips on how to provide support within an app for
> either SDI OR MDI (according to individual user preference).
>
> The reason is that I have a leagacy MDI app that is now SDI and I'd
> like to offer users the option to stay on MDI if they want to.
>
> Thanks,
> Tom
>

tomconlon7777777:
I have been developing a MDI app for the past 8 mos and learned the 
following:
1.  The Delphi help files recommend against changing form style at runtime
2.  At design time, you can change a form's form style from fsNormal to 
fsMDIForm (main form) or to fsMDIChild with little consequence, however, 
changing a fsMDIChild form back to a fsNormal form does not seem to work 
well when you try to do a fNormalForm.showmodal.

Also...
I have experimented with multiple fsNormal forms in a SDI app and 
discovered that you "can" create multiple instances of such forms and 
they seem to work fine, independently and when retrieving (global) 
vars/values from the main form.  However, I have not experimented far 
enough to learn how the main form would differentiate between these 
multiple instances (presumeably by a win handle or caption property), or 
how instances of the same form class would share/pass vars/values 
between themselves.

My recommendation is to settle on either SDI or a MDI app.  If you 
don't, you may find yourself supporting two apps with little in common 
besides their business rules.

Good luck.
Sam Hunt





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