Re: [PW-dev] Freezing and Thawing widgets

[<ja...@la...>]

Bingo!

I suggest that a widget contain a list of properties to be saved when frozen and to be recalled when thawing.

@freeze_props=qw(fname size width colour shape foo bar);

Other properties will no doubt exist for any given widget but only the above actually get frozen or thawed.

Cheers,
J

On Mon, 11 June 2001, James G Smith wrote:

> 
> "Jay Lawrence" <Ja...@La...> wrote:
> >From: "Gunther Birznieks" <gu...@ex...>
> >> How do you propose supporting this API-wise?
> >
> >$stored_data = $widget->freeze;
> 
> Sounds good to me.
> 
> >This should return a data structure (i.e. hash) in a format like Storable or
> >Data::Dumper of all of the properties of the object that are persistant. I
> >don't belive that you can just freeze or thaw your runtime object as it
> >might have extra information that is not suitable for storing. (ie/ object
> >ref to controller object, etc). Not to mention it is implementation
> >specific - and if you change your implementation your frozen objects won't
> >be as easy to recall.
> 
> The frozen widget should only contain data specific to the widget and not any 
> state information, since that may change before it is thawed out.  Makes sense 
> to have the function be in the widget.  I'll put a freeze method in my 
> Widget::Base before putting it up so people can see how it might work (at 
> least my way of doing it :/).
> 
> >My idea to get this data back might be as follows:
> >
> >$widget=Widget->new( thaw => $stored_data );
> >    # Will know what class this object is from contents of $stored_data
> >or
> >$widget=new Widget::Foo;
> >$widget->thaw( $stored_data );
> >    # Gotta check that stored_data widget class matches this widget class,
> >eh?
> 
> Perhaps also:
> 
> $widget = Widget -> thaw($stored_data);   ?
> 
> I'll try to stick that into my Widget::Controller package as well.
> -- 
> James Smith <JG...@TA...>, 979-862-3725
> Texas A&M CIS Operating Systems Group, Unix
> 
> 
> 
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