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Re: IDLVM and retall [message #50020 is a reply to message #50016]

Thu, 07 September 2006 01:57

JD Smith
Messages: 850
Registered: December 1999

Senior Member

On Wed, 06 Sep 2006 23:21:54 -0700, JD Smith wrote:

> On Wed, 06 Sep 2006 21:30:08 +0200, Fï¿½LDY Lajos wrote:
>
>>
>> On Wed, 6 Sep 2006, JD Smith wrote:
>>
>>> On Tue, 05 Sep 2006 17:31:04 +0200, Fï¿½LDY Lajos wrote:
>>>
>>>>
>>>> On Mon, 4 Sep 2006, JD Smith wrote:
>>>>
>>>> > [quoted text muted]
>>>>
>>>> probably a CATCH in main helps. It works in IDL 6.2 (linux).
>>>
>>> But that blocks my active command line.
>>>
>>> Thanks,
>>>
>>> JD
>>>
>>
>> your original problem was RETALL not working in the IDL VM, where you have
>> no command line. You can use RETALL in real IDL, CATCH in the VM. There is
>> a /VM test in LMGR. I know, the code will be ugly, but will work.
>>
>
> I thought of that after I responded, but (correct me if wrong), I don't
> think you can even have a main level routine in the VM, since your entry
> routine must be a named procedure.

I eventually resorted to something along these lines:

pro test_vm_event, ev
a=dialog_message('Testing RETALL',/ERROR)
if lmgr(/VM) || lmgr(/RUNTIME) then message,'TEST-VM-ERROR',/NOPRINT else $
retall
end

pro test_vm
command_line=~lmgr(/VM) && ~lmgr(/RUNTIME)
b=widget_base(/ROW)
but=widget_button(b,VALUE='Do It!')
widget_control, b,/realize
if ~command_line then begin
XManager,CATCH=0
catch,err
;; Just keep processing events
if err ne 0b then begin
XManager
return
endif
endif
XManager,'test_vm',b,NO_BLOCK=command_line
end

I.e. using a blocking XManager call if there is no command line. As
long as the first entry call to XManager in the VM program is
blocking, all subsequent calls (starting other related widgets, for
exmaple) will use the XManager event loop, by-passing the
(quasi-broken, in my opinion) "active command line" widget processing
equivalent in the VM.

Unhandled errors will be sent all the way out to this top level
routine, which can ignore the error and kick start event processing
again with an argument-less call to XMANAGER. If this (or any
subsequent) nested XMANAGER returns, return from the entire program to
avoid double calls to the original entry XMANAGER.

The only other ingredient is turning off XManager's default catch
mechanism, and using MESSAGE to throw an error instead of RETALL.
It's not elegant, but it does the job.

JD

P.S. BTW, Fï¿½ldy, in your original suggestion, the main level CATCH
part was never being compiled: when the compiler gets to TEST_VM, it
stops. The ON_ERROR,1 was what was doing the trick for you (only in
commmand-line enabled runtimes).

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[Message index]

		Re: IDLVM and retall By: JD Smith on Fri, 08 September 2006 09:35
		Re: IDLVM and retall By: JD Smith on Fri, 08 September 2006 09:30
		Re: IDLVM and retall By: JD Smith on Fri, 08 September 2006 09:26
		Re: IDLVM and retall By: JD Smith on Fri, 08 September 2006 09:12
		Re: IDLVM and retall By: news.qwest.net on Fri, 08 September 2006 09:10
		Re: IDLVM and retall By: btt on Fri, 08 September 2006 09:02
		Re: IDLVM and retall By: news.qwest.net on Fri, 08 September 2006 08:42
		Re: IDLVM and retall By: David Fanning on Fri, 08 September 2006 08:28
		Re: IDLVM and retall By: btt on Fri, 08 September 2006 07:57
		Re: IDLVM and retall By: David Fanning on Thu, 07 September 2006 21:00
		Re: IDLVM and retall By: JD Smith on Thu, 07 September 2006 15:57
		Re: IDLVM and retall By: David Fanning on Thu, 07 September 2006 12:14
		Re: IDLVM and retall By: JD Smith on Thu, 07 September 2006 11:54
		Re: IDLVM and retall By: David Fanning on Thu, 07 September 2006 06:52
		Re: IDLVM and retall By: JD Smith on Thu, 07 September 2006 01:57
		Re: IDLVM and retall By: JD Smith on Wed, 06 September 2006 23:21
		Re: IDLVM and retall By: Foldy Lajos on Wed, 06 September 2006 12:30
		Re: IDLVM and retall By: JD Smith on Wed, 06 September 2006 11:53
		Re: IDLVM and retall By: Foldy Lajos on Tue, 05 September 2006 08:31
		Re: IDLVM and retall By: David Fanning on Fri, 08 September 2006 09:48

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