[racket] GUI: text field on a canvas

To get rid of the 5 pixels, you want to set the "inset", not the
"margin". See `vertical-inset` and `horizontal-inset` in `editor-canvas%`.

At Fri, 18 Jul 2014 00:22:15 -0500, Robby Findler wrote:
> You can put the text% object directly into the editor-canvas if you want.
> Also, the 5 pixels is part of the margin I believe and you can set it to 0
> if you want.
> 
> Robby
> 
> On Friday, July 18, 2014, Dmitry Pavlov <dpavlov at ipa.nw.ru> wrote:
> 
> > Hello,
> >
> > I have the need to put a text field into a certain location of a canvas,
> > without decorations.
> > What I came up with so far is:
> >
> > #lang racket
> > (require racket/gui)
> >
> > (define frame (new frame% (label "Test")))
> > (define pasteboard (new pasteboard%))
> >
> > (define editor-canvas
> >   (new editor-canvas%
> >        (editor pasteboard)
> >        (parent frame)
> >        (style '(no-border no-hscroll no-vscroll))))
> >
> > (define t (new text%))
> > (define ts
> >   (new editor-snip%
> >        (editor t)
> >        (left-margin 0)
> >        (right-margin 0)
> >        (top-margin 0)
> >        (bottom-margin 0)
> >        (with-border? #t)))
> > (send pasteboard insert ts 0 0)
> >
> > (define yellow-delta (send (make-object style-delta%)
> >                            set-delta-background (make-object color%
> > "yellow")))
> > (send t change-style yellow-delta)
> > (send pasteboard set-caret-owner ts)
> >
> > (send frame resize 100 100)
> > (send frame show #t)
> >
> >
> > Two questions:
> >
> > 1. Is it the most natural way to do what I need?
> > (I also looked into embedded-gui but did not find
> > anything that looks like an embedded text field).
> >
> > 2. What I see is:
> > http://imgur.com/Ws4R140
> > It is obvious that the text is off the (0,0) point where
> > it should be by about 5 pixels by x and y.
> > I tried placing it in (-5, -5) and got this:
> > http://imgur.com/WrSE1qG
> > Setting (with-border? #f) did not help.
> > How can it be fixed?
> >
> > Best regards,
> >
> > Dmitry
> > ____________________
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> >
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