[fpc-devel] Recent added support for Observer pattern in FCL

[Graeme Geldenhuys]

On 28/08/12 13:15, michael.vancanneyt at wisa.be wrote:
>
> For example, on my 'doubtful' list I had "ooPropertyChange", to be used
> in combination with the GetPropInfo() and a call in TPersistent:
>
> FPOPropertyChanged(Const APropName : String);


This could work, and I can see use-cases where this could be useful. I'm 
not sure how much overhead it will add though, but probably very small 
if done correctly. How would streaming affect this? eg: populating 
objects from a .lfm file. I don't use such streaming, but thought I need 
to mention it. For more accurate information, I guess the best would be 
to do a reference implementation, create a test case, and decide from there.


Regards,
   - Graeme -