45 lines
2.0 KiB
Plaintext
45 lines
2.0 KiB
Plaintext
From: earlybird at mop.no (Alexander Staubo)
|
|
Date: Mon, 24 May 1999 06:17:04 +0200
|
|
Subject: Defining VCL-like framework for Python
|
|
References: <1284777593-1647219@hypernet.com> <7i9nn5$a9m$1@cronkite.cc.uga.edu> <3748B569.3973A8E4@palladion.com>
|
|
Message-ID: <MPG.11b2f1272831bc55989688@148.122.208.74>
|
|
Content-Length: 1645
|
|
X-UID: 1906
|
|
|
|
In article <3748B569.3973A8E4 at palladion.com>, tseaver at palladion.com says...
|
|
> Graham Matthews wrote:
|
|
[snip]
|
|
> > So how does a framework differ from a GUI toolkit with several abstraction
|
|
> > layers?
|
|
>
|
|
> A toolkit is like a box of Legos: you snap the supplied pieces together as you
|
|
> see fit, supplying all the "structure" of you app de novo; a frameword IS that
|
|
> structure, prebuilt, with pre-defined "hotspots" at which you can plug in
|
|
> specializations of a set of interfaces defined by the framework. If the
|
|
> framework's internal model of the problem domain is appropriate to your
|
|
> application, you write maybe 10% or less of the code required to implement the
|
|
> same app using the toolkit; this is the classic "programming by difference."
|
|
> Mismatches between the framework's paradigm and your needs are VERY hard to work
|
|
> around, however (you can't add unforeseen hotspots to a framework without
|
|
> hacking into it).
|
|
|
|
Actually, the Delphi VCL is pretty good at avoiding this problem, as it is
|
|
extremely open-ended and doesn't exclusively subscribe to the "black box"
|
|
philosophy of (eg.) Visual Basic. Otoh, it _can_ be viewed as a black box, an
|
|
intensional side-effect of its strict component/publishing design.
|
|
|
|
Incidentally, the VCL does not preclude mixing frameworks. It's possible to
|
|
write programs that utilize the Win32 API, and then have one deeply implemented
|
|
function bring up a Delphi form. Delphi's VCL structure does not force the
|
|
framework on you.
|
|
|
|
Imho a good Python GUI framework should not limit your application to using
|
|
only that one framework.
|
|
|
|
--
|
|
Alexander Staubo http://www.mop.no/~alex
|
|
|
|
|
|
|
|
|