[lazarus] TNotebook vs TTabbedNotebook

[Curtis White]

On 08-Jan-2000 d0hb0y wrote:
> Couldn't TNotebook be a subclass of TTabbedNotebook where the default value 
> of "showtabs" was set to false?  That way we get the best of both worlds I 
> would think.

They are both a subclass of TCustomNotebook which contains all the notebook
functionality.

> 
> I suppose it could be reversed such that TNotebook is the base class and 
> TTabbedNotebook is just TNotebook with showtabs set to true :)

This is basically how it was. They both inherited from TCustomNotebook which
contained all the functionality of the notebook. The only difference was that
the TNotebook set the tabs to false and TTabbedNotebook set them to true. I
think there may be some additional properties that were also different, but I
don't remember for certain.

It really doesn't make much sense to have two of them to do almost the same
thing. It would be better to have just TNotebook with a TabsVisible property
that allows you to set it to true or false and turn on and off tabs. But if we
don't have a TTabbedNotebook, then every Delphi program that uses it will
have to be converted to use TNotebook and the TabsVisible property. We could
easily do this in Lazarus as long as we remember that it must be done.

Between the holidays and me completely rebuilding all my computers (upgrading
them all to faster processors and more RAM), I haven't had any time to work on
Lazarus. But things are getting back to normal again and I should start having
some time again. I am planning to make up a web page that explains what needs
to be changed when converting from Delphi to FPC/Lazarus. Maybe we can just
keep the single TNotebook and I will add that to the page as something that
must be converted.


Curtis