Subject:
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Re: Suggestion for interprocess communication
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Newsgroups:
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lugnet.cad.dev
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Date:
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Thu, 10 Feb 2000 15:00:02 GMT
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Viewed:
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882 times
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In lugnet.cad.dev, Anders Isaksson writes:
> ... SNIP ...
> Ever tried Delphi? :-))
Yes, :-((((
>
> I'm sorry if I sounded a bit 'unresponsive' (tired, got a cold). I realize
> you're right, we should probably use the builtin Windows D&D (Our programs are
> not easily ported to unix/Linux anyway).
No problem :-) Hope you feel weel again soon ...
>
> I think that we should use plain CF_TEXT as the clipboard format, as every
> program handling text can paste it too.
The only problem is if there are apps accepting CF_TEXT but doesn't know about
LEGO at all, you will loose a part :-(
Private formats which are registers with just one easy function call, would
ask for a unique name defined as a standard for LEGO Apps, and thus avoid
dropping a LEGO part to an application which shouldn't accept it!
Also using private formats allows defining a simple C-structure which is
passed to the drag-drop operation.
But I'm open ....
>
> But we do need some kind of protocol - LDList will want to know if a drop was
> accepted/used, to be able to keep piece counts correct (Is this already
> inherent in Win D&D?).
The source of the drag & drop operation (that one where you start the drag ..)
calls a function which returns the result of the drag&drop operation, which is
returned from the drop-target application.
It can be one of (not exactly the MS defs.) NONE ... nothing done
COPY ... drop target copied the data
MOVE ... drop target moved data (normaly not used between seperate apps).
The program could return whatever it likes of theese codes.
Suggestion: NONE means target did not except the operation, COPY or MOVE means
done.
>
> OK, back to the manuals, I'll try to read up on D&D in Delphi...
COOL ... :-) ... happy reading, let me know if you find something else useful
for us ...
Michael
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Message has 1 Reply:
 | | Re: Suggestion for interprocess communication
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| Michael: (...) What about using MOVE when running in "set mode"? Since other programs accepting plain text data most likely use COPY, LDList will know whether to subtract the part from the collection. When just running in "unlimited building mode" (...) (25 years ago, 12-Feb-00, to lugnet.cad.dev)
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Message is in Reply To:
| | Re: Suggestion for interprocess communication
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| (...) Yeah, well. I'm using Borland Delphi, and I suppose there are easy support for D&D there too, although I've never used it. (...) Of course it's possible - nothing is impossible! If it's worth the effort is another question :-) (...) Ever tried (...) (25 years ago, 10-Feb-00, to lugnet.cad.dev)
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