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Re: crazy question [message #65374]

Mon, 02 March 2009 13:55

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Vince Hradil writes:

> What about using EXECUTE, or CALL_METHOD, CALL_PROCEDURE, or
> CALL_FUNCTION? Isn't that what those are for?

It wouldn't work with CALL_METHOD, CALL_PROCEDURE,
or CALL_FUNCTION, since these only allow you to
specify the method, function, or procedure name
as a string. But I suppose you could get it to
work somehow with EXECUTE. I just usually rule
that out since I prefer my code be able to run
on the IDL Virtual Machine. (Only God knows why,
though, since I don't think anyone in the world
has actually run my code using the Virtual Machine!)

Cheers,

David

--
David Fanning, Ph.D.
Coyote's Guide to IDL Programming (www.dfanning.com)
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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Re: crazy question [message #65375 is a reply to message #65374]

Mon, 02 March 2009 13:37

Jean H.
Messages: 472
Registered: July 2006

Senior Member

llo wrote:
> There is a way to do that for a ROUTINES or FUNCTIONS that uses
> KEYWORDS ?
>
>
try with execute(), but your code will not run in the virtual machine...

Jean

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Re: crazy question [message #65376 is a reply to message #65375]

Mon, 02 March 2009 13:47

Vince Hradil
Messages: 574
Registered: December 1999

Senior Member

On Mar 2, 3:27 pm, David Fanning <n...@dfanning.com> wrote:
> llo writes:
>> There is a way to do that for a ROUTINES or FUNCTIONS that uses
>> KEYWORDS ?
>
> Alas, no. Whatever it is ITTVIS is doing, they are
> doing out of sight. :-)
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Coyote's Guide to IDL Programming (www.dfanning.com)
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")

What about using EXECUTE, or CALL_METHOD, CALL_PROCEDURE, or
CALL_FUNCTION? Isn't that what those are for?

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Re: crazy question [message #65377 is a reply to message #65375]

Mon, 02 March 2009 13:27

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

llo writes:

> There is a way to do that for a ROUTINES or FUNCTIONS that uses
> KEYWORDS ?

Alas, no. Whatever it is ITTVIS is doing, they are
doing out of sight. :-)

Cheers,

David
--
David Fanning, Ph.D.
Coyote's Guide to IDL Programming (www.dfanning.com)
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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Re: crazy question [message #65378 is a reply to message #65377]

Mon, 02 March 2009 13:19

natha
Messages: 482
Registered: October 2007

Senior Member

There is a way to do that for a ROUTINES or FUNCTIONS that uses
KEYWORDS ?

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Re: crazy question [message #65379 is a reply to message #65378]

Mon, 02 March 2009 13:16

natha
Messages: 482
Registered: October 2007

Senior Member

Thanks david

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Re: crazy question [message #65380 is a reply to message #65379]

Mon, 02 March 2009 13:16

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Fanning writes:

> Make your object inherit from an IDLitComponent object,
> then you can use the SetPropertyByIdentifier method
> to do this. (You probably have to register the properties
> you want to set this way, first. See the RegisterProperty
> method.) This will work for *any* object, not just object
> graphics objects. I use it extensively in the Catalyst
> Library.

I'm wrong about the registering part. You have to
register the properties you want to display in a
PropertySheet widget, which is *another* wonderful
benefit of subclassing the IDLitComponent object.
But registering doesn't have anything at all to do with
the SetPropertyByIdentifier method.

Cheers,

David
--
David Fanning, Ph.D.
Coyote's Guide to IDL Programming (www.dfanning.com)
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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Re: crazy question [message #65381 is a reply to message #65380]

Mon, 02 March 2009 13:10

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

llo writes:

> Is it possible to do something like that?
>
> ex='KEYWORD_NAME'
> aa=OBJ_NEW('AN_OBJECT')
> aa->SetProperty, ex=5
>
> I know this is imposible but maybe there is way to use strings (as a
> keywords) to set values.

Make your object inherit from an IDLitComponent object,
then you can use the SetPropertyByIdentifier method
to do this. (You probably have to register the properties
you want to set this way, first. See the RegisterProperty
method.) This will work for *any* object, not just object
graphics objects. I use it extensively in the Catalyst
Library.

Cheers,

David

--
David Fanning, Ph.D.
Coyote's Guide to IDL Programming (www.dfanning.com)
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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Re: crazy question [message #65469 is a reply to message #65378]

Tue, 03 March 2009 01:04

Foldy Lajos
Messages: 268
Registered: October 2001

Senior Member

On Mon, 2 Mar 2009, llo wrote:

> There is a way to do that for a ROUTINES or FUNCTIONS that uses
> KEYWORDS ?

You can do that with _EXTRA and CREATE_STRUCT:

; cut here, keytest.pro
pro keytest, key1=key1, key2=key2, _extra=ex
help, key1, key2
end
; cut here

IDL> keytest
% Compiled module: KEYTEST.
KEY1 UNDEFINED = <Undefined>
KEY2 UNDEFINED = <Undefined>
IDL> keytest, _extra=create_struct('key1', 1, 'key2', 2)
KEY1 INT = 1
KEY2 INT = 2
IDL>

regards,
lajos

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