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Re: Predicting string lengths in widgets [message #55235 is a reply to message #55142]

Mon, 06 August 2007 09:40

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

On Aug 6, 5:41 am, mattf <mfe...@earthlink.net> wrote:
> Hi all...
>
> I have a table widget and I'd like to set the column widths -before-
> the table is realized so that the user doesn't have to fiddle with
> adjustable widths. Unfortunately, I don't know the lengths of the
> strings that I'm going to put into the table before running the
> program, and the strings may be rather long. And, for a cross-platform
> application, I don't know what the font will be, or, for that matter,
> the size of the display.
>
> At the moment, I'm just hacking at the problem by using a pixmap
> window and the width parameter in xyouts to get an idea of the string
> length in pixels, e.g., if the string is 'test_str' I do
>
> str_max_sz
> window, /free, /pixmap, xsize = str_max_sz, ysize = str_max_sz
> xyouts, test_str, width = w
> wdelete
> str_pix_len = ceil(w*str_max_sz)
>
> and then use a fudge factor to get good-looking column widths from
> str_pix_len. But there must be a way of doing it, you know,
> correctly... no?

Check out the STRING_SIZE keyword to WIDGET_INFO. (IDL 6.2+ required.)

Mike
--
www.michaelgalloy.com

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[Message index]

		Predicting string lengths in widgets By: mattf on Mon, 06 August 2007 04:41
		Re: Predicting string lengths in widgets By: mattf on Mon, 06 August 2007 10:08
		Re: Predicting string lengths in widgets By: Michael Galloy on Mon, 06 August 2007 09:40

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