Hello,
Sorry for dropping out of the conversation for a while.
Here is the smallest example that I could produce:
#lang racket
(require racket/gui
racket/draw
table-panel)
(define test%
(class
table-panel% (super-new (dimensions '(1 1)))
;vertical-panel% (super-new)
;horizontal-panel% (super-new)
(define vpanel
(new vertical-panel%
(parent this)
(border 0)
(style '(vscroll))
;(min-height 1)
))
(for ((i (in-range 10)))
(new button%
(parent vpanel)
(label (format "Button ~a" i))
))
))
(define frame
(instantiate frame% ("Test")))
(void (new test% (parent frame)))
(send frame resize 200 200)
(send frame show #t)
On Windows, it results into:
..\..\Program
Files\Racket\share\pkgs\draw-lib\racket\draw\private\syntax.rkt:252:13:
initialization for bitmap%: bad argument combination: 192 0 #f #t 1.0
On Linux, it works, although the vertical panel ends up with a small
visible size.
If I specify a min-height at least one to the vertical panel, the error
is gone, and the panel is the size of the window.
If I use vertical-panel% or horizontal-panel% instead of table-panel%,
the error is gone, and the panel is the size of the window.
So the problem here is that table-panel% handles its children in a
certain way, and that the height of the scrollable panel ends up zero.
I did not write table-panel. I currently do not know whether a fix
should be done in table-panel or gui-lib.
In my program, (min-height 1) helps, so I can live with the way it is now.
Best regards,
Dmitry
On 07/30/2016 12:44 AM, Vincent St-Amour wrote:
Should this change be added to gui-lib?
Vincent
On Fri, 29 Jul 2016 10:08:46 -0500,
Dmitry Pavlov wrote:
Matthew,
Yes that works, thank!
Also I figured why the message did not show up on my "first" WinXP
installation: the spreadsheet-editor package has not been updated there.
Newer version of spreadsheet-editor sets (style '(hide-vscroll)) and
(style '(hide-hscroll)) to panels with row and column buttons.
Styles cause the error. Changing styles to just '(hscroll) and
'(vscroll) does not remove the error.
Anyway, I need those (hide-vscroll) and (hide-hscroll), so I am going to
use the patch you proposed, unless there is a more elegant solution I am
unaware of.
(Another question is why there is a stack trace in 32-bit Windows and
just a message in 64-bit Windows, but that is of purely theoretical
importance to me.)
Best regards,
Dmitry
On 07/29/2016 05:25 PM, Matthew Flatt wrote:
It may be that a guard against a 0-sized drawing dimension is needed.
The right place for the guard might be in the `get-cr` method of
gui-lib/mred/private/wx/common/backing-dc.rkt
after `get-backing-size` is called. A zero dimension could be just
increased to 1 before passing it to `get-backing-bitmap`. Can you try
making that change to see if it solves the problem on your machine?
At Fri, 29 Jul 2016 17:08:42 +0300, Dmitry Pavlov wrote:
Jens,
Oddly, another installation of Racket 6.6 on 32-bit Windows XP not only
reproduced the error, but also gave a stack trace:
initialization for bitmap%: bad argument combination: 495 0 #f #t 1.25
context...:
C:\Program
Files\Racket\share\pkgs\draw-lib\racket\draw\private\syntax.rkt:252:13: next
C:\Program
Files\Racket\share\pkgs\draw-lib\racket\draw\private\bitmap.rkt:156:2
C:\Program
Files\Racket\collects\racket\private\class-internal.rkt:3553:0:
continue-make-object
C:\Program
Files\Racket\collects\racket\private\class-internal.rkt:3507:0:
do-make-object
C:\Program
Files\Racket\share\pkgs\gui-lib\mred\private\wx\common\backing-dc.rkt:122:4:
get-cr method in backing-dc%
C:\Program
Files\Racket\share\pkgs\gui-lib\mred\private\wx\common\canvas-mixin.rkt:144:4:
do-on-paint method in ...mon/canvas-mixin.rkt:118:2
C:\Program
Files\Racket\share\pkgs\gui-lib\mred\private\wx\common\queue.rkt:454:6
C:\Program
Files\Racket\share\pkgs\gui-lib\mred\private\wx\common\queue.rkt:505:32
C:\Program
Files\Racket\share\pkgs\gui-lib\mred\private\wx\common\queue.rkt:653:3
bitmap.rkt confirms your hypothesis that the first number is the width,
and the second number is the height, and they both must be positive.
[([exact-positive-integer? w]
[exact-positive-integer? h]
[any? [b&w? #f]]
[any? [alpha? #f]]
[positive-real? [scale 1.0]])
The width is not specified exactly in the app. I do not know why the
height is zero. I do not use bitmaps directly, just controls and canvas.
I will go with trial and error to get a small reproducible example.
Regards,
Dmitry
On 07/28/2016 11:50 PM, Jens Axel Søgaard wrote:
Just a hunch: If 486 is a width - then the 0 could be a problematic
height?
Do you recognize the number 486?
/Jens Axel
2016-07-28 22:29 GMT+02:00 <dpav...@iaaras.ru <mailto:dpav...@iaaras.ru>>:
Hello,
Running my GUI app from Racket 6.6, I see the following error
message in the console:
initialization for bitmap%: bad argument combination: 486 0 #f #t 1.0
It happens on 64-bit Windows 7 and 10, and does not happen on
32-bit Windows XP and 64-bit Linux.
It also did not happen on Racket 6.5.
The app continues to work despite the error. There is no stack
trace whatsoever.
What can I do to trace the problem?
Best regards,
Dmitry
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