I guess I prefer the convention of changing the mouse pointer to
"busy" rather than putting a little throbber by the link for two
reasons:
1. the throbber risks messing with the layout of the page
2. Changing the cursor has a much longer history as a UI convention
for computer busyness
Now Firefox was already changing the cursor for Ajax operations for
some cases, but it was inconsistent,
I think this small class deals with that:
/**
* AjaxFallbackLink that changes mouse pointer to "progress" (i.e.
busy) during Ajax operations
* for the link itself (in case the pointer is still hovering over it)
and the whole document
* (if the pointer has been moved)
*
*/
public abstract class ProgressPointerAjaxFallbackLink extends AjaxFallbackLink {
public ProgressPointerAjaxFallbackLink(final String id) {
this(id, null);
}
public ProgressPointerAjaxFallbackLink(final String id, final IModel model){
super(id, model);
}
@Override
protected IAjaxCallDecorator getAjaxCallDecorator() {
return new AjaxCallDecorator(){
private static final long serialVersionUID = 1L;
public CharSequence decorateScript(CharSequence pScript) {
return
"this.style.cursor='progress';document.body.style.cursor='progress';"+pScript;
}
public CharSequence decorateOnSuccessScript(CharSequence pScript) {
return
"this.style.cursor='pointer';document.body.style.cursor='auto';"+pScript;
}
public CharSequence decorateOnFailureScript(CharSequence pScript) {
return
"this.style.cursor='pointer';document.body.style.cursor='auto';"+pScript;
}
};
}
}
"ProgressPointerAjaxFallbackLink" is more concise but probably less
readable than my coworker's suggestion "BusyCursorAjaxFallbackLink".
Actually I might switch to the latter.
Feedback to this approach and/or implementation welcome.
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