[fpc-pascal] Is there a smart way to save/restore NotifyEvents and objects?
dennis at avidsoft.com.hk
Sat Feb 3 06:55:50 CET 2018
Sven Barth via fpc-pascal wrote:
> Am 02.02.2018 17:53 schrieb "Dennis" <dec12 at avidsoft.com.hk
> <mailto:dec12 at avidsoft.com.hk>>:
> I have list of objects which contains references to other objects.
> I need to save all these objects to harddisk to be restored on a
> latter day.
> I know how to stream the data fields of these objects to a
> TFileStream but the tricky part is these how to restore the object
> The only way I can think of is to assign unique IDs to each
> objects and store these IDs to file.
> When these objects are later restored, I used these IDs find the
> actual objects and re-assign them back to the object references.
> It is tedious. Is there a smarter way?
> Also, there are some TNotifyEvent fields e.g. OnClick, OnClose
> etc. How do I save and restore them from file?
> Many thanks in advance.
> If your objects inherit from TComponent and you use published
> properties you can use the streaming screen of the RTL.
I am curious how TComponent save and restore TnotifyEvent fields. Can
you explain a little bit?
Also, what is 'streaming screen' of RTL? How to use it?
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