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Re: [paragui-users] want to run my dll idea for pg past anyone who cares
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From: |
Andrew Ford |
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Subject: |
Re: [paragui-users] want to run my dll idea for pg past anyone who cares to look |
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Date: |
Tue, 4 Jun 2002 13:17:52 -0700 (PDT) |
Seems good to me, except for the char**. How does
GetParamStr work, and how do we know which
"customtagname" to ask for in the handler?
I was thinking of registering a handler with a custom
tag that it handles.
--- Alexander Pipelka <address@hidden> wrote:
> Yep. I would also prefer some kind of hook-system.
>
> What about adding a new messagetype (e.g.
> MSG_XMLHEADATTS).
> With this it would be possible to add a
> messagehandler (e.g. to a
> PG_Application object) to process the event.
>
> app.SetCallback(MSG_XMLHEADATTS, &my_xmlhandler);
>
> PARAGUI_CALLBACK(my_xmlhandler) {
> atts = (const char**)data;
>
> char* val = PG_Layout::GetParamStr(atts,
> "customtagname");
> }
>
> Maybe a solution ?
>
> Alex
>
> Am Die, 2002-06-04 um 21.05 schrieb Andrew Ford:
> > I don't know how many people would use that
> feature
> > regularly. Seems a bit bloaty to me. How about
> > adding hooks to the layout parser to enable
> > application specific tag processing? Or how about
> a
> > plugin-like system for the layout parser? Is this
> > possible?
> >
> > Andrew.
> >
> > --- Keith Swyer <address@hidden> wrote:
> > > well, i have been asking a few questions about
> dlls
> > > and pg etc latley, so i
> > > thought i'd run my idea by you...
> > >
> > > - make changes to the loadlayout to incorporate
> a
> > > tag in the head for any
> > > dlls you want to dynamically load
> > > in your app at runtime. somthing like...
> > >
> > > <DLL name proxyname baseclass>
> > >
> > > name - the name of the dll
> > > proxyname - the name of the exported
> function
> > > that will instantiate your
> > > new class
> > > baseclass - the baseclass that your new
> class
> > > uses (maybe not needed)
> > >
> > > - in the loadlayout function all of the dlls
> will be
> > > loaded and instantiated
> > > into a list held in the PG_Application class
> > > map <string, baseclass *, less<string>
> >
> > > _map;
> > >
> > > we can then load the dll and insert a new
> class:
> > > _map[name] = instantiate(proxyname)
> > >
> > > of coarse one limitation is easily seen.....you
> can
> > > only use one baseclass
> > > type for ALL dlls used
> > >
> > > - now, back in your main program you will be
> able to
> > > access the _map with
> > > all of the classes and since they are
> > > all derived from your baseclass, you don't need
> to
> > > know the names of them to
> > > call functions. and with the map, you can get
> the
> > > name of the new class.
> > >
> > > PG_Application will possibly need a few new
> members.
> > > ??
> > >
> > > - personally, what i am trying to accomplish is
> the
> > > following.
> > >
> > > the main app loads a layout which is the 'main
> menu'
> > > and given any dlls in
> > > the <head> new buttons are added
> > > to the menu. I am not worried about doing this
> > > dynamically, whenever new
> > > dlls are added, you change this main
> > > layout to add new buttons. now with the new
> buttons
> > > attached to their dlls,
> > > pressing a button will bring you to
> > > a new 'area', hiding the main menu and showing
> all
> > > of the new 'area' by
> > > calling a member such as ShowArea() in the dll.
> THe
> > > class in the dll in turn
> > > holds a list of all of its widgets so that we
> can
> > > show/hide all of them
> > > witout have to destroy then create them again by
> > > moving b/w 'areas'.
> > >
> > > anyway, can anyone see any major flaws or see
> > > anything that should be
> > > added.?
> > >
> > > -Keith
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > paragui-users mailing list
> > > address@hidden
> > >
> >
>
http://mail.freesoftware.fsf.org/mailman/listinfo/paragui-users
> >
> >
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