AW: [plt-scheme] Changing the behavior of the run and debug button inDrScheme

Hi Greg,
thanks for your hints. They will definitely help me. I looked already at the
tools manual before I wrote the first mail but it didn't help me where
actually to find the code which is executed, when the run button is clicked
and how to extend/override it. So do you or anybody know where to look at?
Robert

-----Ursprüngliche Nachricht-----
Von: plt-scheme-bounces at list.cs.brown.edu
[mailto:plt-scheme-bounces at list.cs.brown.edu] Im Auftrag von Gregory Cooper
Gesendet: Sonntag, 17. Februar 2008 21:37
An: Robert Matovinovic
Cc: plt-scheme at list.cs.brown.edu
Betreff: Re: [plt-scheme] Changing the behavior of the run and debug button
inDrScheme


Hi Robert,

Yes.  You'll probably need to define a tool with mixins that extend various
DrScheme classes.

You can use drscheme:get/extend:extend-unit-frame to apply a mixin to the
unit frame (the class for the top-level DrScheme window).  The mixin can
override the execute-callback method, which gets invoked when the user
clicks Run or Debug.

To run your startup code: the unit frame provides a current-tab method, to
which you can send get-ints to get the associated interactions-text object.
Once you have the interactions-text, you can send it
run-in-evaluation-thread with a thunk containing the code you want to run.

As far as running shutdown code, you can similarly use
drscheme:get/extend:extend-tab to override enable-evaluation in the tab.
(I'm pretty sure enable-evaluation gets invoked once all the definitions
have been run, which should give you a suitable hook. Someone else can
correct me if I'm wrong about this.)

For examples of these mechanisms in use, you can look in
collects/mztake/debug-tool.ss.  There may be simpler examples, but that's
where my experience comes from.

Cheers,
Greg

On Feb 17, 2008 2:02 PM, Robert Matovinovic <robert.matovinovic at web.de>
wrote:
> Hi,
> is it possible to change the behavior of the run and debug buttons in 
> DrScheme via a tool? I implemented a module language to control an 
> external program via DDE (this ancient Windows dynamic data exchange). 
> I would like to implement an automated connection setup to the 
> external program before the program in the definitions window in 
> executed or debugged and an automated disconnection afterwards, if 
> that language is chosen. Can anybody point me to the right files to 
> look at and what might be a good way to go? Thanks a lot. Robert
> _________________________________________
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