| keyword inheritance in object graphics [message #91820] |
Wed, 02 September 2015 07:58  |
dg86
Messages: 118
Registered: September 2012
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Senior Member |
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Dear Folks,
I'm trying to write a wrapper routine that creates an object plot,
overlays some arrows on the plot, and then returns the plot object.
I'd like to use keyword inheritance to provide options for both
plot() and arrow() within my routine. The idea is something like
function arrowplot, x, y, _extra=extra
pl = plot(x, y, _extra = extra)
ndx = [0, 1]
ar = arrow(x[ndx], y[ndx], _extra=extra)
return, pl
end
I assumed that the plot(...) and arrow(...) functions would
each use the keywords they understand and ignore the rest.
Instead, the arrow(...) function throws an error whenever it
encounters an unfamiliar keyword in the extra structure.
Is this correct behavior, or is it a bug? I've tested this
in IDL 8.4.
Many thanks,
David
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| Re: keyword inheritance in object graphics [message #91821 is a reply to message #91820] |
Wed, 02 September 2015 12:50  |
penteado
Messages: 866
Registered: February 2018
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Senior Member
Administrator |
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On Wednesday, September 2, 2015 at 7:58:32 AM UTC-7, David Grier wrote:
> Is this correct behavior, or is it a bug? I've tested this
> in IDL 8.4.
As I understand it, this is intended behavior, because unlike iTools (which ignore any keywords they do not know, even if not passed with _extra), Function Graphics (not Object Graphics) have keyword checking code in them (the VerifyProperty method). However, you can use the /undocumented keyword, which would disable this checking:
p=plot(/test,/somethingthatdoesnotexist,/undocumented)
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| Re: keyword inheritance in object graphics [message #91822 is a reply to message #91821] |
Wed, 02 September 2015 13:20 |
dg86
Messages: 118
Registered: September 2012
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Senior Member |
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On Wednesday, September 2, 2015 at 3:50:16 PM UTC-4, Paulo Penteado wrote:
> On Wednesday, September 2, 2015 at 7:58:32 AM UTC-7, David Grier wrote:
>> Is this correct behavior, or is it a bug? I've tested this
>> in IDL 8.4.
>
> As I understand it, this is intended behavior, because unlike iTools (which ignore any keywords they do not know, even if not passed with _extra), Function Graphics (not Object Graphics) have keyword checking code in them (the VerifyProperty method). However, you can use the /undocumented keyword, which would disable this checking:
>
> p=plot(/test,/somethingthatdoesnotexist,/undocumented)
Dear Paulo,
Thanks very much for this extremely helpful fix.
I could not be more jazzed that my code is going to rely on
the "undocumented" boolean keyword, which indeed is
undocumented. :)
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| Re: keyword inheritance in object graphics [message #91823 is a reply to message #91821] |
Wed, 02 September 2015 13:21 |
wlandsman
Messages: 743
Registered: June 2000
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Senior Member |
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Neat! Looking in the lib/graphics directory I see that several new graphics functions (e.g. LEGEND, COLORBAR) have the /UnDocumented keyword.
But I have to ask. Is the /undocumented keyword documented somewhere? --Wayne
On Wednesday, September 2, 2015 at 3:50:16 PM UTC-4, Paulo Penteado wrote:
> On Wednesday, September 2, 2015 at 7:58:32 AM UTC-7, David Grier wrote:
>> Is this correct behavior, or is it a bug? I've tested this
>> in IDL 8.4.
>
> As I understand it, this is intended behavior, because unlike iTools (which ignore any keywords they do not know, even if not passed with _extra), Function Graphics (not Object Graphics) have keyword checking code in them (the VerifyProperty method). However, you can use the /undocumented keyword, which would disable this checking:
>
> p=plot(/test,/somethingthatdoesnotexist,/undocumented)
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