Re: [Dynapi-Dev] Widgets (was [no subject])

[Scott A. L. <sc...@sc...>]

I think what's being overlooked in your idea is that prototype methods
won't be inherited.  makeWidget creates a string of the contents of the
*constructor*; but it doesn't include the prototype properties.

It looks like makeWidget creates an entire new constructor.  If you
passed DynLayer to makeWidget it would return a completely new object
identical to DynLayer constructor as your widget base, plus any
modifications you made.  Is this a good approach?

scottandrew

Jordi 'IlMaestro' Ministral wrote:
> 
> What is trying to do is, given that the toString method of a function return its
> source code, is to add lines just after "function() {" and before the source, and then
> eval the new function. So the function passed as parameter is rewriten.
> 
> This way we can have clean widget constructors and automatically add all the
> initializations code that make a widget a widget. If this code is to be changed we
> don't have to bother editing th widget sources because that inheriting code is added
> by the API and not hard-coded into each constructor.
> 
> The idea is turn method to string, split into to strings: until { and after }, insert
> our code between them and eval everything.
> 
> Robert Rainwater wrote:
> 
> > I'm not quite sure I follow your DynAPI.makeWidget.  Could you explain
> > that in a little more detail.  I don't understand what makeWidget is
> > trying to do there.
> >
> > Robert
> >
> > --
> > Email: <mailto:rra...@ya...>
> > PGP Key ID: 0x703D7F7C
> >
> > > I've been thinking about this for some tome now and our main problem here is
> > > having all our widgets to share the DynLayer functionalities without sharing any
> > > properties. We need some sort of initialization code such as:
> > >
> > > myWidget = function() {
> > >     // Init code
> > >
> > >     // Assign id
> > >     this.id = ...
> > >
> > >     // Widget stuff starts here
> > >
> > > }
> > >
> > > // Maybe not anymore
> > > myWidget.prototype
> > >
> > >
> > > However hard-coding it into all our widgets is a pain and when we need to change
> > > something then we have to edit all of your widgets and we force people to
> > > 'remember' whet has to be placed at the beggining of each constructor. I thing
> > > this can be solved by having this method (this is the idea, I haven't been able
> > > to code it)
> > >
> > > DynAPI.makeWidget = function(constructor) {
> > > var code = window[constructor].toString()
> > > // now we have the code
> > > var header = code.substring(0,code.indexOf("{"))
> > > var rest = code.substring(code.indexOf("{"))
> > > var newcode = header + have all the common init stuff in a String here + rest
> > > eval(constructor+" = "+newcode)
> > >
> > > // If needed attach prototying, assign variables, etc.
> > > }
> > >
> > >
> > > This way your widget code should be independent of the inheritance method
> > > adopted. This I presume, I haven't tested. Tell me what you think
> > >
> >
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