<HTML><BODY>(<A class=RktStxLink href="http://docs.racket-lang.org/reference/ivaraccess.html#%28form._%28%28lib._racket%2Fprivate%2Fclass-internal..rkt%29._send%29%29" data-pltdoc="x">send</A> a-canvas <A name=(meth._(((lib._mred/main..rkt)._canvas~25)._get-view-start))></A><A class=RktValLink href="http://docs.racket-lang.org/gui/canvas_.html#%28meth._%28%28%28lib._mred%2Fmain..rkt%29._canvas~25%29._get-view-start%29%29" data-pltdoc="x">get-view-start</A>) Then add to get-x/get-y Среда, 19 июня 2013, 13:47 +09:00 от 김태윤 <kty1104@gmail.com>: <BLOCKQUOTE style="BORDER-LEFT: #0857a6 1px solid; PADDING-BOTTOM: 0px; MARGIN: 10px; PADDING-LEFT: 10px; PADDING-RIGHT: 0px; PADDING-TOP: 0px" class=mailru-blockquote> <DIV> <DIV class="js-helper js-readmsg-msg"> <STYLE type=text/css></STYLE> <DIV id=style_13716175150000001015 class=mr_read__body><BASE href="https://e.mail.ru/" target=_self> <DIV id=style_13716175150000001015_BODY>how can I get image's x and y? in short, the scrollbar was moved so I can see image's area whose x and y are from 90, 90 to 290, 290. at this moment, I move mouse to upper-left corner of the window. and get 0,0. but I want to get 90,90. how can I do this? thanks! here my code  #lang racket/gui (require racket/draw) (define f   (new frame%        [label "hey"]        [width 200]        [height 200])) (define img (read-bitmap "some_image.png")) (define img-w (send img get-width)) (define img-h (send img get-height)) (define (pcb c dc)   (send dc draw-bitmap img 0 0)) (define my_c%   (class canvas%     (define/override (on-event e)       (printf "x: ~a y: ~a \n" (send e get-x) (send e get-y)))     (super-new))) (define c (new my_c%                [parent f]                [style (list 'hscroll 'vscroll)]                [paint-callback pcb])) (send c init-auto-scrollbars img-w img-h 0 0) (send f show #t) ____________________   Racket Users list:   <A href="http://lists.racket-lang.org/users" target=_blank>http://lists.racket-lang.org/users</A> </DIV><BASE href="https://e.mail.ru/" target=_self></DIV></DIV></DIV></BLOCKQUOTE> -- Roman Klochkov </BODY></HTML>