Re: [paragui-users] re: loadlayout

[Alexander Pipelka]

Am Mit, 2002-04-17 um 16.45 schrieb Andrew Ford:
> What about static proxy functions that pass the
> message on to whatever dynamic function you want to
> handle it?  
> 
> messageHandler( message )
> {
>   sendMessageToDynamicHandler( message, handler )
> }
> 
> widget->SetEventCallback( messageHandler )

Good point :)

All that wrapped in a class combined with a map over librarynames and
functionnames could provide a convenient way to snap in different
function callbacks. (wow, really epic).

;o)

Alex



> 
> --- Alexander Pipelka <address@hidden> wrote:
> > Am Mit, 2002-04-17 um 16.15 schrieb Keith Swyer:
> > > thanks. is it possible have the actual functions
> > loaded dynamically at
> > > runtime? this is most likley away from the
> > > scope of the current ParaGUI, but something I am
> > interested in doing if not
> > > currently available. Reason being, i am looking at
> > a program which has
> > > several similar areas, with more or less buttons
> > than another, and would
> > > like to keep coding sizes minimal to reduce
> > re-compiling and make it more
> > > expandable easier.
> > 
> > Well, that's beyond the scope currently.
> > 
> > A workaround would be to reconnect all callbacks
> > after loading the
> > functions from a shared lib. 
> > 
> > e.g.: You have 2 widgets (w1, w2) calling callback
> > functions (c1,c2)
> > implemented differently in library1, library2.
> > 
> > dlopen(library1)
> > c1 = dlsym(library1, function1)
> > c2 = dlsym(library1, function2)
> > 
> > w1->SetEventCallback(..., c1);
> > w2->SetEventCallback(..., c2);
> > 
> > some time later you might do:
> > 
> > dlopen(library2)
> > c1 = dlsym(library2, function1)
> > c2 = dlsym(library2, function2)
> > 
> > w1->SetEventCallback(..., c1);
> > w2->SetEventCallback(..., c2);
> > 
> > Don't expect the code above to pass any compiler run
> > :))
> > 
> > But beware! This can be dangerous.
> > 
> > Alex
> > 
> > 
> > > 
> > > --Keith
> > > 
> > > Am Mit, 2002-04-17 um 15.36 schrieb Keith Swyer:
> > > > hi, just wondering how to use the loadloayout
> > function and connect a
> > > button
> > > > in the layout to a function.
> > > 
> > > Quite easy :))
> > > 
> > > - load your layout via LoadLayout()
> > > 
> > > - get a pointer to the widget e.g.:
> > > PG_Widget* my_widget =
> > PG_Application::GetWidgetByName("widgetname");
> > > 
> > > - connect your widget to the callback
> > > my_widget->SetEventCallback(...)
> > > or
> > > my_widget->SetEventObject(...)
> > > 
> > > That's it.
> > > Have fun.
> > > 
> > > Alex
> > > 
> > > 
> > > 
> > >
> >
> @------------------------------------------------------------
> > > Keith Swyer
> > > Software Engineer
> > > 
> > > www.adventus.com
> > >
> >
> @-------------------------------------------------------------
> > > 
> > > 
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> > >
> >
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> > > 
> > 
> > 
> > 
> > 
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