You could make a class.friend method, returning boolean
public function friend ( class as variant ) as boolean
dim result = false
if class isa friendlyTypeOfClass then
result = true
end if
if class isa differentFriendlyTypeOfClass then
result = true
end if
return result
end function
the inside your other methods
public function someMethod( class as variant ) as integer
if friend( class ) then
// do some valid processing
else
return someInvalidresultLikeMinus1 // or something else
end if
end function
----- Original Message -----
From: "William Squires" <wsquires at satx dot rr dot com>
To: "REALbasic NUG" <realbasic-nug at lists dot realsoftware dot com>
Sent: Monday, October 31, 2005 2:01 PM
Subject: Re: OOP
On Oct 30, 2005, at 3:03 PM, Ryan Dary wrote:
How does the Public/Protected/Private not do that for you now? In
RB2005, you can choose from the following for every declared method of
a class:
Public - Accessible anywhere (inside or outside the class)
Protected - Accessible anywhere within the class or the subclasses.
Private - Accessible only by the class which declares it.
Would this be sufficient or are you needing something else? Perhaps I
misunderstood the question..
Cheers,
Ryan Dary
I think he meant, "how can you make a class expose public methods,
but only to another - specified, and different* - class?"
* By "differnt", I mean that the 'other' (different) class is neither a
subclass nor a superclass of the original class (the one he wanted the
methods exposed on).
Bob Gordon wrote:
Hello.
I've been working on (mainly playing around) with a
couple of things, and I'd like to run something by the
group:
Many times I need a class to have some public methods,
but I want them only visible to some other class that
will be the only user of this class. This other class
would have public methods/properties so it can be used
in a program.
For example, let's say I am making a help system.
There might be one or two methods a program would use
to open the help window and locate the desired topic.
But, inside the help system, there might be some sort
of help item. This would have its own public methods.
I would like to be able to hide such methods such that
they are visible inside the subsystem (component?) but
not visible outside.
Such a concept would simplify documentation and usage
for such subsystems. Is this something RB should have?
Is there a way to do it now?
-Bob Gordon
Coming Soon
The Book of Fictional Days 2006
A Strictly Limited Edition
For Information email gordon1bob at yahoo dot com
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William H Squires Jr
4400 Horizon Hill #4006
San Antonio, TX 78229
wsquires at satx dot rr dot com dot nospam <- remove the .nospam
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