I have large images to display that might take some time to make their
way to the browser. When a user requests a new image I'd like to
display a generic "loading" image and then replace that image url with
the correct one when loaded (note, this is using one image object). I
have it working in Firefox and Safari, but IE never gets the alert.
Here's the basics of the code:
public class SwapImage extends Image implements LoadListener {
private String url = null;
public SwapImage() {
super(BLANK_IMG_URL);
addLoadListener(this);
}
public void setUrl(String url) {
this.url = url;
// first set the url to the loading image
super.setUrl(LOADING_IMG_URL);
}
public void onLoad(Widget sender) {
if(url == null) return; // to abort on the second load alert
// url needs to be null before calling setUrl()
String s = url;
url = null;
// on the first load alert this url represents the img we're
interested in
super.setUrl(s);
}
}
I might be able to make things work with a new Image object each time
a new URL is needed, but I'd really like to avoid that. Is there
anything I'm missing that would make this work in IE?
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