| Re: String length when FONT=1 [message #29160 is a reply to message #29091] |
Fri, 01 February 2002 11:27  |
Paul van Delst
Messages: 364
Registered: March 1997
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Senior Member |
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Andrew Cool wrote:
>
> Paul van Delst wrote:
>>
>> Hey there,
>>
>> Anyone know how to determine string length in normalised units when you're using truetype
>> fonts?
>>
>> Currently I have:
>>
>> ch_size = CONVERT_COORD( !D.X_CH_SIZE, !D.Y_CH_SIZE, /DEVICE, /TO_NORMAL )
>> x_ch_size = ch_size[ 0 ] * charsize
>> x_length = STRLEN( my_string ) * x_ch_size )
>>
>> which works great for the regular on-screen hershey type of fonts, but not for proportional
>> fonts.
>>
>> any ideas? what I want to do is blank out the plot behind the text, e.g. like for legends etc.
>>
>> paulv
>
> Hiya Paul,
>
> Does the Width keyword to XYOUTS not help? e.g. :-
>
> XYOUTS, x, y, string, WIDTH=thisWidth, CHARSIZE=-1
>
> Charsize of -1 suppresses printing to the window, and the variable
> thisWidth returns the width of the string in normalized coordinates.
Hmm...this does not seem to work as advertised on my system.
IDL> print, !version
{ x86 linux unix 5.4.1 Jan 16 2001 32 32}
The following is what I get for the string lengths via the XYOUTS with font=1:
Level ppmv 0.0484790
ppmv->cd->corr.ppmv 0.0991605
corr-nocorr ppmv 0.0736377
corr-interp ppmv 0.0700989
nocorr-interp ppmv 0.0809504
oh so incorrect.
BTW, your code was downloaded uuencoded so I never saw it.
paulv
--
Paul van Delst Religious and cultural
CIMSS @ NOAA/NCEP purity is a fundamentalist
Ph: (301)763-8000 x7274 fantasy
Fax:(301)763-8545 V.S.Naipaul
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