On 22/02/2012 22:21, John Patten wrote:
I've tried both Ken and Gerry's suggestions for downloading images in the
background via a URL.
I attempted to combine both Ken and Gerry's examples, in order to prevent the
error messages I was receiving in Ken's first example. However, it is not
working...yet.
I think the problem is that "libUrlDownloadToFile" downloads a file
asynchronously. That is to say that it doesn't hang about and wait for
the transfer to happen. Therefore you get all of your image downloading
requested at the same time!
If you put a callbackMessage after libUrlDownloadToFile, it will get
called when the download is finished:
on mouseUp
send "downloadImage 1" to me in 0 milliseconds
end mouseUp
on downloadImage idx
if idx<= the number of lines in cd fld "imageURLs" then
set the itemDel to tab
put item 1 of line idx of cd fld "imageURLs" into tURL
set the itemDel to "/"
put the last item of tURL into tImagename
put specialfolderpath("Documents")&"/WhaleImages/" before tImagename
libUrlDownloadToFile tURL, tImagename, "downloadComplete "&(idx+1)
end if
end downloadImage
on downloadComplete idx
send "downloadImage "&idx to me in 0 milliseconds
end downloadComplete
That way, you only have a single download happening at any one time again.
-Ken
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