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Re: IDLgrAxis set TICKVALUES in specific positions [message #61422]

Thu, 17 July 2008 09:59

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

bernat writes:

> I tried it with no results. EXAMPLE:
>
> values=['0','30','50','70']
> values_pos=['50','55','76','256']
> text_arr=objarr(n_elements(values))
> for i=0, n_elements(values)-1 do begin
> itext=OBJ_NEW('IDLgrText', values[i], FONT=self.font, $
> RECOMPUTE_DIMENSIONS=2, /ENABLE_FORMATTING)
> text_arr[i]=itext
> endfor
>
> ;-- then the axis
>
> axis=OBJ_NEW('IDLgrAxis', 1, TEXTPOS=1, TICKDIR=0, $
> TICKTEXT=text_arr, /EXACT, MAJOR=N_ELEMENTS(values), MINOR=0,
> TICKLEN=3)
>
> axis->GetProperty, TICKTEXT=ticktext, YCOORD_CONV=ys
> for i=0, n_elements(ticktext)-1 do begin
> location=[ys[0], (values_pos[i]/256.)*ys[1]]
> ticktext[i]->SetProperty, LOCATION=location
> endfor
>
> xobjview, axis

The thing about object graphics that makes it so much fun
to work with, is that there are thousands of ways to do
something incorrectly and one one way (usually) to do it
right. And the best part is: YOU GET NO FEEDBACK!!! :-)

Try this:

values=['0','30','50','70']
values_pos=['50','55','76','256']
text_arr=objarr(n_elements(values))
for I=0, n_elements(values)-1 do begin
itext=OBJ_NEW('IDLgrText', values_pos[I], $
RECOMPUTE_DIMENSIONS=2, /ENABLE_FORMATTING)
text_arr[I]=itext
endfor

;-- then the axis

axis=OBJ_NEW('IDLgrAxis', 1, TEXTPOS=1, TICKDIR=0, $
TICKTEXT=text_arr, /EXACT, MAJOR=N_ELEMENTS(values), MINOR=0,$
TICKLEN=3, TICKVALUES=values_pos/256.)

axis->GetProperty, TICKTEXT=ticktext, YCOORD_CONV=ys
for I=0, n_elements(ticktext)-1 do begin
location=[ys[0], (values_pos[I]/256.)*ys[1]]
ticktext[I]->SetProperty, LOCATION=location
endfor

xobjview, axis

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

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[Message index]

		Re: IDLgrAxis set TICKVALUES in specific positions By: David Fanning on Thu, 17 July 2008 09:59
		Re: IDLgrAxis set TICKVALUES in specific positions By: natha on Thu, 17 July 2008 09:32
		Re: IDLgrAxis set TICKVALUES in specific positions By: David Fanning on Thu, 17 July 2008 08:39
		Re: IDLgrAxis set TICKVALUES in specific positions By: natha on Thu, 17 July 2008 10:10

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