[racket] GUI: text field on a canvas

Robby,

> Use [editor t] on the line just above here (and move the definition of t up).

Ah, I see. But what I actually need is an editor that
does not occupy the whole canvas (other area of
the canvas can have some graphics on it), and also
I need to place the editor arbitrarily on the canvas.

With that in mind, the pasteboard becomes necessary,
am I right?

Best regards,

Dmitry