Howdy all,
I’m working on adding more goodies to my XTab application, but am running into a slight problem. For testing purposes, I created a tab file (an xml file) with some missing values, to see how the app would handle it. (Crash, Error, ect)
Well, it loads it just fine, but in the text fields, it displays , which is obviously not very good for the UI.
So, enter my script. This bit is meant to check to see if a particular variable returns a missing value, and if so, replace it with “Unknown”. However, it doesn’t appear to be picking up on that at all. I previously had a log function right before the repeat, to see exactly what was being returned, which did return a missing value.
on loadtab()
try
tell application "System Events" to tell contents of XML file tabfile
set {songtitle, songartist, songalbum, tabber, difficulty, tabs} to value of XML elements of XML element "Tab"
end tell
repeat with i in {songtitle, songartist, songalbum, tabber, difficulty, tabs}
if i = missing value then
log "got missing value" --Lets see if it picked up the value
set item i to "Unknown"
end if
end repeat
tell window "XTab"
set contents of text field "songfield" to songtitle
set contents of text field "artistfield" to songartist
set contents of text field "albumfield" to songalbum
set contents of text field "tabber" to tabber
set contents of text field "difficulty" to difficulty
set contents of text view "tabs" of scroll view "tabscroll" to tabs
end tell
end try
end loadtab
As far as I know, this SHOULD work. However, the log is never triggering, so my script doesn’t appear to be picking up on the missing value. Any ideas?
Thanks!
-Parrot
set item i to "Unknown"
What is item i referring to? (item i of what?)
Also, that list you’re referring doesn’t exist after the repeat loop is finished.
Edit: Also, in your code, i is a reference to an item, not a number.
Edit: How about this?
tell application "System Events" to tell XML file tabFile
set xmlValues to value of XML elements
end tell
count xmlValues
repeat with i from 1 to result
if item i of xmlValues is missing value then set item i of xmlValues to "Unknown"
end repeat
xmlValues
Thanks! That’s got all that working.
I’m still curious how I should reference these, though. (I could be missing something. I’m not familliar with that final xmlValues used by itself at the end of the code) I need to have the individual results set to a variable so that I can use them later in the script (I.E play track songTitle in iTunes)
My goal is
1- set the value of each individual xml element to a variable
2- check and see if any of these variables are missing values. If so, replace the value of that variable with “Unknown”
3- set the contents of each text field to their respective variable
I’d presume there is a way to do that with your script, but I’ve still got a lot to learn, so it’s escaping me at the moment 
is it along the lines of
set fieldsList to {"SongTitle", "SongArtist", "SongAlbum", "Tabber", "Difficulty", "Tabs"}
repeat with i from 1 to result
if item i of xmlValues is missing value then set item i of xmlValues to "Unknown"
set contents of text field (item i of list fieldsList) to (item i of list xmlValues)
end repeat
However, that doesn’t work. It doesn’t error, but it doesn’t work, either. (It also never sets the value to a variable, but this is kinda coming off the top of my head :P)
Any further help is much appreciated This is proving to be trickier than I thought
Thanks!
-Parrot
The only problem I see is that you don’t have a complete reference to the text field. Try something like this:
tell application "System Events" to tell XML file tabFile
set xmlValues to value of XML elements
end tell
set fieldsList to {"SongTitle", "SongArtist", "SongAlbum", "Tabber", "Difficulty", "Tabs"}
count fieldsList
repeat with i from 1 to result
if item i of xmlValues is missing value then set item i of xmlValues to "Unknown"
tell text field (item i of list fieldsList) of window "main" to set contents to (item i of list xmlValues)
end repeat
Note: I use tell text field just because I prefer to read it that way; This should work too:
set contents of text field (item i of list fieldsList) of window "main" to (item i of list xmlValues)