comp.lang.idl-pvwave archive - RDF feed
type: channel
description: Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
items: Please help with buggy widget code

Please help with buggy widget code
type: item
description: Hi All, This one's really got me baffled. I've already run it by our local expert. The original program was suppose to allow the user to select from a list the name of a FITS format file to open, read, and then plot. I've shortened it into a test version. The problem is this. After the first 1 or 2 reads some variable becomes undefined causing the FITS reader to crash. Is there something about event handlers and reading files that I'm missing here? The FITS reader is READFITS.PRO in astrolib. I'm running version 3.0.0 on a DECstation 5000 with Ultrix4.2A. I've included the test version below. It's suppose to read the same file over and over but crashes on the second read. Any old FITS file should work. If someone would like to try it with same file please e-mail me. This was really a great and efficient user interface until it broke. Any hints or suggestions would be appreciated. Thanks, Roger PRO test6_event, event common TEST6_DATA, total_junk type = tag_names(event, /structure) CASE type OF 'WIDGET_BUTTON': BEGIN widget_control, event.id, get_value=value CASE value OF 'Exit': widget_control, event.top, /destroy 'Next': BEGIN print,'reading' data=readfits('tmp.fits') print,'ok' print,total_junk END ELSE: print, 'Uhhh, what?' ENDCASE END ELSE: print, "I'm not suppose to be here." ENDCASE END FUNCTION test6 common TEST6_DATA, total_junk total_junk = 0 base=widget_base(title='test6',/row) xmenu,['Exit','Next'],base,/row widget_control, base, /realize xmanager,'test6',base RETURN, 1 END
creator: rouse
date: 1994-07-26T19:18:00-00:00