Wolfgang, No disagreement, but then we return to the question: why not use an existing toolkit such as gtk? Especially as there is an existing haskell interface to it from which a lot can be learned. On 25-Jan-2003 Wolfgang Jeltsch wrote:
On Friday, 2003-01-24, 16:22, CET, Adrian Hey wrote:
[...]
1- What does this low level code do that requires it to be written in C? I can't think of any particular reason for this other than speed, and I can't think of anywhere a gui really needs speed other than for rendering. (But that can't be so because, as everybody keeps telling me, writing our own portable rendering code is a really bad idea :-)
Hello,
I think it is really good to provide the platform-independent imperative interface in C because this way it is also usable with other programming languages than Haskell. This results in more people interested in developing the interface and the underlying implementations. By the way, I'm heavily interested in such a C interface also as a basis for a platform-independent Ada library.
[...]
I'd like to add that I'm really impressed by the work Krasimir, Daan and maybe others have done in developing HToolkit. The approach of * developing a platform-independent C interface * implementing it on top of different native APIs * creating a thin Haskell binding to the C interface is exactly what I favor. I haven't a detailed picture of HToolkit yet but at least these three points are something I'd like to see in a future standard.
I'd like to point out again that although the C interface shall be low level concerning programming style (i.e., it shall be imperative) it should be high level concerning the facilities it provides (e.g., it should provide complete file selection dialogs). As Peter Achten mentioned in his mail from 2003-01-24 11:48:32 +0100, abstraction is essential.
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