[racket] display problem

Op 12-4-2012 18:03, Nick Shelley schreef:
>         Only beside. But how can I then take care that the text are 
> displayed into the empty-scene.  I think you need overlay or something 
> for that.
>
> Every image function returns an image, so you can use beside to create 
> an image of your text with the cursor in the right spot, and then 
> place that image in your empty scene however you want (you used 
> place-image, which would work, but I would suggest place-image/align).
>
> In general, I would suggest (as HtDP does) that you experiment with 
> each piece of the image in the interactions pane, and then experiment 
> with composing them until you get what you want. For instance, use the 
> interactions pane to try to get the text and cursor together using 
> different image functions until you like what you get, then do the 
> same with composing that result and the background.
>
> On Thu, Apr 12, 2012 at 6:18 AM, Roelof Wobben <r.wobben at home.nl 
> <mailto:r.wobben at home.nl>> wrote:
>
>     Op 12-4-2012 14:00, Stephen Bloch schreef:
>
>         On Apr 11, 2012, at 12:03 PM, Roelof Wobben wrote:
>
>             I changed the contract to Editor ->  Number.
>             When I change the make-editor function the value changed.
>             So I think the check-expect is wrong but I have no clue
>             how to change it.
>
>         No, the check-expect is fine; the definition is wrong.  As I
>         recall (I don't have it in front of me), it doesn't actually
>         use its parameter.
>
>
>     The function is this :
>
>
>     (define (width editor)
>      (image-width (text (editor-pre verwerker) 11 "black")))
>
>     As I understand your remark it doesn't use editor.  So I have to
>     rewrite it so it uses the parameter editor-pre verwerker ??
>
>     Roelof
>
>
>             I find the way with overlay and beside more the hard way.
>
>         Why do you need "overlay"?  I would think you could do this
>         just with "beside" (unless you wanted to fine-tune the
>         formatting).
>
>
>     Only beside. But how can I then take care that the text are
>     displayed into the empty-scene.  I think you need overlay or
>     something for that.
>
>
>         Stephen Bloch
>         sbloch at adelphi.edu <mailto:sbloch at adelphi.edu>
>
>
>
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>

Oke,

Then back to the drawing table.

Roelof

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