[plt-scheme] Editor Canvas as Output Port

From: Williams, M. Douglas (M.DOUGLAS.WILLIAMS at saic.com)
Date: Sun Apr 29 10:07:46 EDT 2007

Actually, open-output-text-editor was exactly what I was looking to do.  Thanks.

-----Original Message-----
From: Matthew Flatt [mailto:mflatt at cs.utah.edu]
Sent: Sun 4/29/2007 2:30 AM
To: Williams, M. Douglas
Cc: plt-scheme at list.cs.brown.edu
Subject: Re: [plt-scheme] Editor Canvas as Output Port
At Sat, 28 Apr 2007 21:27:27 -0700, "Williams, M. Douglas" wrote:
> For one thing, it 
> only works for text, while, for example, DrScheme lets me write graphic 
> elements (e.g., an image snip) using print (or printf even).  Am I correct in 
> that I need to supply an optional-write-special-proc to handle these?

Probably. DrScheme installs some write and print handlers to make
things like `fprintf' work, but adding a write-special handler is a
good starting point.

> There seem to be similar things in the Application Framework, but I've only 
> skimmed over them so far.  They seem to be overkill for simple MrEd 
> applications, but that may well be a learning curve issue more than anything.

`open-output-text-editor' is provided by plain MrEd.


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