[Lazarus] Quick Modern Object Pascal Introduction, for Programmers

Travis Ayres trayres at gmail.com
Thu Jun 23 01:25:25 CEST 2016

Hi Graeme,

I don't understand the problem tiOPF is trying to solve well enough to
fully grok it in context - I've never used a database, only flat files. GUI
programming in an understandable way... clueless, it always devolves into
miserable, miserable spaghetti code.

That said, it's better spaghetti code than when I started with Lazarus, so
maybe eventually it'll be acceptable. Hah!

On Wed, Jun 22, 2016 at 2:21 PM, Graeme Geldenhuys <
mailinglists at geldenhuys.co.uk> wrote:

> On 2016-06-22 18:57, Travis Ayres wrote:
> >  The Observer, MVVM,
> > Adapter patterns, whatever - it would be great to find more examples of
> > these.
> You mean like these... a series of articles I wrote about design
> patterns implemented in Object Pascal. ;-)
>    http://geldenhuys.co.uk/articles/
> As for MVVM, I had a different spin on MVP (Model-View-Presenter) and
> MVC (Model-View-Controller). Both MVP especially implements everything
> from scratch. Instead I implemented MGM (Model-GUI-Mediator) which is
> very similar to MVP in concept, except it reuses available widget events
> found in all modern GUI toolkit widgets. There is an article on MGM too,
> but that was kept simple for the sake of the article. For a much
> improved version of MGM, take a look at the code available as part of
> the tiOPF project (on SourceForge). The tiOPF implementation of MGM
> supports VCL, LCL, fpGUI and FMX (Delphi's Firemonkey) toolkits.
> ps:
>   Design Patterns are meant to be documented as an idea of how to
>   solve a commonly found problem. It isn't meant to serve as a
>   code template. So there can be many ways of implementing the
>   same design pattern. eg: Most books and articles I've read
>   implement the Visitor pattern in a very limited way. tiOPF
>   implements it in a more generic way, and actually makes it even
>   more flexible.
>   The tiOPF project is what got me hooked on design patterns. That
>   framework uses many different design patterns, and improved the
>   quality of the framework tremendously.
> Regards,
>   Graeme
> --
> fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal
> http://fpgui.sourceforge.net/
> My public PGP key:  http://tinyurl.com/graeme-pgp
> --
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> Lazarus at lists.lazarus-ide.org
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