Sam Hough wrote:
>
> In my ignorance it seems tough to make that work the second time if the
> list has changed. It is also less pretty as the only extension points I
> have are renderIterator and renderChild. I can think of nasty hacks like
> using IdentityHashMap to hold onto Components I've already added an
> AttributeAppender (the HTML monkey is class happy) to...
>
Try using a modifier like this:
private static class BoundHighlighter extends AttributeModifier {
private Component owner;
public BoundHighlighter() {
super("class", true, null);
}
protected String newValue(String currentValue, String
replacementValue) {
int idx = getItemIndex();
return idx == 0 ? "first" : (idx == getItemCount() - 1
? "last"
: null);
}
public void bind(Component component) {
super.bind(component);
this.owner = component;
}
private int getItemIndex() {
return getItem().getIndex();
}
private Item getItem() {
Component parent = owner.getParent();
while (!(parent instanceof Item)) {
parent = parent.getParent();
}
return (Item) parent;
}
private int getItemCount() {
return getItem().getParent().size();
}
}
The code below uses it for a Label contained in a repeater Item:
public Home() {
RefreshingView view = new RefreshingView("view") {
protected Iterator getItemModels() {
List<IModel> models = new ArrayList<IModel>();
int n = 2+new Random().nextInt(10);
for (int i = 0; i < n; i++) {
models.add(new Model(i));
}
return models.iterator();
}
protected void populateItem(Item item) {
item.add(new Label("label", item.getModel())
.add(new BoundHighlighter()));
}
};
add(view);
}
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