<div dir="ltr">A dc<%> object doesn't work like that. If you want to draw something into it, you have to set up a callback and draw during the dynamic extent of the callback. Also, if you do that, you probably want to use a canvas% object, not an editor-canvas%. The editor-canvas% objects already do a lot of work to control what gets drawn in there based on what is in the text% object.<div> </div><div>Robby</div></div><div class="gmail_extra"> <div class="gmail_quote">On Fri, Sep 20, 2013 at 8:40 PM, Alan Johnsey <<a href="mailto:a.johnsey@cox.net" target="_blank">a.johnsey@cox.net</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div lang="EN-US" link="blue" vlink="blue" style="word-wrap:break-word"> <div> Thanks. That will do for now, but it remains a mystery to me why my approach doesn’t work. -Alan <div> <div class="MsoNormal" align="center" style="text-align:center"> <hr size="2" width="100%" align="center"> </div> From: Matthias Felleisen [mailto:<a href="mailto:matthias@ccs.neu.edu" target="_blank">matthias@ccs.neu.edu</a>] Sent: Friday, September 20, 2013 10:17 AM To: Alan Johnsey Cc: 'Racket Mailing List' Subject: Re: [racket] Using GUI editor </div> <div><div class="im"> <div> On Sep 20, 2013, at 1:05 PM, Alan Johnsey wrote: </div> </div><div class="im"> <div link="blue" vlink="purple"> <div> It looks like I’ve stumbled into another area where I’m lacking a basic understanding of what’s going on. I’m trying to use the built-in editor in the gui package, but I need to put some initial content into the editor window. When I put the following in the editor pane and run it, I get the gui editor, but not the text. When I then </div> <div> simply put the last line into the interactions window and execute it, I get the text in the gui editor window as desired. Why? What do I need to do to programmatically modify the text in the gui window? </div> <div> -Alan </div> <div> </div> <div> #lang racket/gui </div> <div> (define f (new frame% [label "Notes"] </div> <div> [width 400] </div> <div> [height 600])) </div> <div> (define c (new editor-canvas% [parent f])) </div> <div> (define t (new text%)) </div> <div> (send c set-editor t) </div> <div> (send f show #t) </div> <div> </div> <div> (define mb (new menu-bar% [parent f])) </div> <div> (define m-edit (new menu% [label "Edit"] [parent mb])) </div> <div> (define m-font (new menu% [label "Font"] [parent mb])) </div> <div> (append-editor-operation-menu-items m-edit #f) </div> <div> (append-editor-font-menu-items m-font) </div> <div> </div> <div> ; above pretty much straight out of the Design Doc </div> </div> <div> </div> <div> </div> </div><div> Do you want this </div><div class="im"> <div> </div> <div> (send t insert "Use this window for making notes" 10 10) </div> <div> </div> <div> instead of the below? </div> <div> </div> </div> <div link="blue" vlink="purple"> <div> </div> <div> (define dc (send c get-dc)) </div><div class="im"> <div> (send dc set-scale 1 1) </div> <div> (send dc set-text-foreground "blue") </div> <div> (send dc draw-text "Use this window for making notes" 0 0) </div> <div> </div> <div> </div> </div>____________________<div class="im"> Racket Users list: <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a></div> </div> </div> </div> </div> ____________________ Racket Users list: <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a> </blockquote></div> </div>