| Re: multiple filters take 2 [message #23276] |
Thu, 18 January 2001 10:25 |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Rochelle Hatton (nrh@imag.wsahs.nsw.gov.au) writes:
> A few days ago I asked about the possibility of using multiple file
> filters with a file selection program. After much fiddling with an
> old program, I decided to have a go at writing a new version that uses
> DIALOG_PICKFILE.
> My question still remains - the help on DIALOG_PICKFILE seems make no
> sense - is it a Windows only option?
> I can't work out from the help whether it is possible on Unix, or is
> it a feature request for RSI?
> Alternatively, has anyone written their own version to allow for more
> than one filter?
I have a program, named SELECTIMAGE, that I wrote for my own
amusement. I didn't really intend for it to become a public
program. Rather, I needed it for some work I was doing for
a client. The client and I are *always* working on PCs, so
I felt free to use some techniques that I know have given
me some headaches on UNIX machines in the past.
For example, I have a little thumbnail image in the program
which allows me to preview the image before I actually
select it. On windows I can resize that draw widget any
which way, and things still don't look good. I'm not sure
what happens on other operating systems. Similarly with
a label widget, which is continually displaying different
information about the file you are browsing currently.
I wouldn't mention it at all, except that it *does* have
the ability to read images of different types by means
of a filter button. Although you can only use one filter
at a time. The program supports any know image format
that has a corresponding QUERY_**** routine associated
with it.
I put it on my web page today, thinking that I might
as well find out what is wrong with it and fix it if
I have to. :-(
You can find a picture and description of the program
here:
http://www.dfanning.com/documents/programs.html#SELECTIMAGE
You will need these three files to run it:
http://www.dfaning.com/programs/selectimage.pro
http://www.dfaning.com/programs/fsc_fileselect.pro
http://www.dfaning.com/programs/tvimage.pro
To read JPEG files, for example:
IDL> image = SelectImage(/jpeg)
Note, that what I had in mind was a more aesthetic (and
more intuitive) version of RSI's DIALOG_READ_IMAGE. :-)
As I say, I will not be surprised to hear about problems
with this. But if you report them, I try to fix them.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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