[plt-scheme] Registering a new snip type

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Sat Aug 15 23:29:51 EDT 2009

On Sat, Aug 15, 2009 at 5:25 PM, Jordan Johnson<jmj at fellowhuman.com> wrote:
> Hi all,
> I've been continuing my work on a snip to represent annotated code, and am
> now at the point of needing to integrate it with DrScheme.  (I'd like to
> test it -- in conjunction with Stephen Bloch's "inventory" approach -- with
> one of my classes this fall.)  I've got a brief (2min) demo online here:
>        http://www.fellowhuman.com/scheme/anno-snip-demo.swf
> I'd like to do the following:

For all of these, you need to create a tool that adds mixins to
DrScheme. See the plugins manual for how to do this (and ask here if
you get stuck).

>        1) create an "Insert" menu item for inserting an empty annotated
> expression snip

Use the "get-insert-menu" method to get the menu and add something to it.

>        2) create a "Scheme" menu item for annotating a chosen expression (as
> I do in the demo)

The get-language-menu method.

>        3) create similar items in the right-mouse-button context menu for
> the Definitions editor

See keymap:add-to-right-button-menu.

>        4) ensure that it's evaluated as an ordinary expression in its place
> would be

The snip needs to implement the readable-snip<%> interface. This is
not drscheme, but mred level (ie, this will work outside of drscheme).


Posted on the users mailing list.