On Mon, Nov 21, 2005 at 11:44:24PM -0800, Brian Klock scratched on the wall:
> Supposing you have an image.jpg file that has been loaded into your applet
> and displayed... if that file has changed on disk, how can you force a
> reload of it inside of the widget so that the new image is displayed? If
> the pathname to the file hasn't changed, it doesn't reload the image
> automatically, even if you empty the image.src property and then re-set it
> to the same value.
>
> The same problem most likely happens with URLs from the web also, I haven't
> tested that though.
This is a very very common problem with pages that use JavaScript
to update graphs, webcams, or other imgs that change.
The standard technique when dealing with http*: URLs is to append a
timestamp as an HTTP var, This makes the URL "different" and forces
a reload. Something like this:
http://www.example.com/imgs/graph.jpg?12326439432
You can generate the epoch timestamp like this:
var now = new Date( );
var fullURL = URL + '?' + now.getTime( );
I have no idea if this works with file: URLs, however.
-j
--
Jay A. Kreibich | CommTech, Emrg Net Tech Svcs
email@hidden | Campus IT & Edu Svcs
<http://www.uiuc.edu/~jak> | University of Illinois at U/C
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