[M3devel] need help with cm3 problem before I deliver software this week

Randy Coleburn rcoleburn at scires.com
Thu Jul 31 17:51:28 CEST 2008

I am using Windows XP Professional, Service Pack 2 (on some systems,
Service Pack 3 is applied).
Michel Dagenais suggested that if the problem does not reproduce on
Linux, that it might have to do with how Windows reports character
events.  He thought a Filter VBT may exist somewhere that would aid in
debugging by printing method calls before propagating them to
father/son.  This filter VBT would be inserted at different places in
the VBT tree to get tracing information.  Are you familiar with
something like this?
As for the pixmaps, Michel suggests increasing the resolution of the
original pixmap to help alleviate problems with upscaling.  I may try
this, but of course, FormsVBT uses a lot of pixmap resources, for
example, radio, boolean, checkmark, numeric, etc all use pixmaps.

>>> "Rodney M. Bates" <rodney.bates at wichita.edu> 7/31/2008 9:33 AM >>>
Which variant of the M3 Windows target are you using?  I don't have
of them built right now.

Randy Coleburn wrote:
> Hi Olaf, Daniel, Rodney, et al:
> Thanks for your responses so far.  Sorry for the delay in replying,
> our email server has been offline for nearly 24-hours.  There were
> severe electrical storms that took down both redundant power systems
> our email system.  Hope I have not missed any of your replies.
> Right now, I am delivering the software on Windows XP using SP2 or 
> greater.  I have not tried to see if this problem also occurs on
> I don't have ready access to a unix system from my current location.
> So it is perhaps a Windows-only problem with Trestle/FormsVBT.  In
> event, it is a real problem for me.
> As for the pixmap stretching problem, I have tested various
> on the customer's computer.  Unfortunately, the customer demands that

> the display resolution stay at the 1920x1200.
> 1920x1200=pixmap stretch problem
> 1680x1050=pixmap stretch problem
> 1440x900=no problem
> 1024x768=no problem
> Regards,
> Randy
>  >>> Olaf Wagner <wagner at elegosoft.com> 7/30/2008 2:24 AM >>>
> Quoting Randy Coleburn <rcoleburn at scires.com>:
>  > Hi:
>  >
>  > I've been using cm3 to develop software I am delivering this week
>  >  a customer.  During the acceptance testing, we've run into a 
>  > problem  that I have not been able to solve.  I am hoping someone
>  > the cm3  community can help.  I need to solve this problem ASAP
>  > week.
>  >
>  > This problem is easily reproduced using the "formsedit" program.
>  >
>  > The problem is with the TypeIn and TypeScript FormsVBT elements
>  >  in my program.  Since formsedit uses these, you can easily 
>  > reproduce  the problem.
>  >
>  > Click with the mouse to move the insertion point somewhere in the 

>  > text.  Observe that the cursor moves to that point.  Now, use the 

>  > left arrow key to move the insertion point a few characters to the
>  > left.  Then, type a few characters.  Observe that the first  
>  > character you type shows up at the place where you initially moved
>  > the cursor with the mouse, while the remaining characters show up
>  >  the place where you moved the cursor via the left-arrow key. 
>  > behavior is wrong.  The first character you type should be at the 

>  > current insertion point, not at the one from the mouse move.
> Randy,
> I just rebuilt the CM3 GUI libraries and formsedit, but I wasn't
> to reproduce the problem on FreeBSD 6.3.
> Does the problem show up on all platforms you are working on?
> Which are these?
> Are there any local modifications to the libraries which I may not
> have?
> If it occurs only on Unix, it may be possible that a weird window
> manager interferes with the event delivery; otherwise I've got no
> good idea. If on Unix, you/we could perhaps test the behaviour
> on a different (remote) X display?
> Please provide more data about the problem context and how to
> reproduce it.
> Regards,
> Olaf
>  > I'm sure the fix is easy, but I haven't been able to locate it
>  >  It probably has to do with the internal idea of the insertion
>  >  not getting updated properly.  Note that the cursor on the screen

>  > is  in the right spot, it's just that the first character gets 
>  > inserted  into the TypeIn or TypeScript in the wrong place (i.e.,
>  > is put at  the place from the mouse move, not from the last arrow

>  > key move).
>  >
>  > Any assistance you can provide is very much appreciated and will
>  > a long way toward keeping Modula-3 use alive and well for this  
>  > project.  If we can't fix this one, the customers will want to  
>  > re-code everything in some Microsoft language, probably C++ or
>  >
>  > I also have one other strange anomaly, but it is less of an issue
>  >  the moment.  On a Dell M4300 laptop at 1920x1200 resolution, all 

>  > pixmaps are getting stretched vertically.  Text seems to be fine
>  > do HBox, Rim, Frame, etc., but pixmaps get vertically stretched
>  > of proportion.  This problem has not happened on all other
>  >  I've tested, (e.g. Lenovo T60 at 1024x768 and 2048x1024, IBM G40
>  >  1400x1050, etc.).  Any ideas on what could be the issue?  I know 

>  > that 1920x1200 is a strange resolution, but it is the native  
>  > resolution for the M4300 laptop computer that the customer is
>  >   I checked and the computer is set for 96dpi (normal).  Perhaps 

>  > there is some Trestle setting that I need to tweak on this
>  >  or perhaps there is a bug that needs fixing.
>  >
>  > Regards,
>  > Randy Coleburn
>  > Senior Systems Engineer
>  > Scientific Research Corporation
>  >
> -- 
> Olaf Wagner -- elego Software Solutions GmbH
>                 Gustav-Meyer-Allee 25 / Gebäude 12, 13355 Berlin,
> phone: +49 30 23 45 86 96  mobile: +49 177 2345 869  fax: +49 30 23
45 86 95
>     http://www.elegosoft.com | Geschäftsführer: Olaf Wagner | Sitz:
> Handelregister: Amtsgericht Charlottenburg HRB 77719 | USt-IdNr:

Rodney M. Bates, retired assistant professor
Dept. of Computer Science, Wichita State University
Wichita, KS 67260-0083
rodney.bates at wichita.edu 

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