Using the latest gwt-incubator with GWT 2.0.1 - I don't see any way to find out
if the ImageLoader fails to find some images; as the callback is not
invoked.
e.g. imagine this code...
String[] dummyUris = {"dummy.jpg"};
ImageLoader.loadImages(dummyUris, new ImageLoader.CallBack() {
public void onImagesLoaded(ImageElement[] imageElements) {
System.out.println("This will never be called!");
}
});
since the "dummy.jpg" does not exist, the callback is never invoked so there's
no way to know if it was loaded or not. Should there be some kind of extra
method on ImageLoader.Callback to indicate that the entire request has
completed, so if no onImagesLoaded() methods are invoked you know things
failed?
Since the code might do some async loading, its a bit scary to just assume
after the loadimages() method returns that things have completed.
Maybe the API needs a little work so its easier to see what images were loaded
and what were not?
Or maybe the array just contains null elements for URIs that could not be
found? Then the API doesn't change (other than null elements in the array when
things can't be found?). Then if you are trying to load 10 images and one
fails, you can spot which elements in the array map to what URIs - and which
one
failed, by just using null checks?
Original issue reported on code.google.com by james.st...@gmail.com on 15 Feb 2010 at 4:31
Original issue reported on code.google.com by
james.st...@gmail.com
on 15 Feb 2010 at 4:31