One way to solve the "abstract method from the constructor" problem (or
more precisely, the "non-final method from the constructor" problem) is
to use a Model, e.g...
public class PopupPanel extends Panel {
public abstract String getTitle();
public PopupPanel(String id) {
add(new Label("foo", new AbstractReadOnlyModel() {
public Object getObject(Component component) {
return getTitle();
}
}
}
}
The model's getObject is only called some time after the object has
been constructed.
jk
On Tue, May 29, 2007 at 07:36:59AM -0400, Ravindra Wankar wrote:
>
> This looks more like a design question but I think there must be a
> better, Wicket way.
>
> I wrote a PopupPanel that allows you to have a "div" popup in a page by
> clicking a link. The contents of the div can be static/loaded via Ajax.
> The popup part with Ajax is working. The link that activates the popup
> can either have an image or text label. So I have...
>
> PopupPanel
> | abstract getTitle() and getContent()
> | constructor calls getTitle() and
> getContents()
> |
> --------------------------------------
> | |
> LabelLinkedPopupPanel ImageLinkedPopupPanel
> implements getTitle() implements getTitle()
>
>
> To use it, new LabelLinkedPopupPanel(...) and override the getContent()
> method. I can't get the title to work because of "abstract method from
> the constructor" problem. My options then are
>
> 1. Have a setTitle() and setContent() method that is called by the
> subclasses but failing to call them won't be caught till runtime.
> 2. Have PopupPanel constructor take in components for title and content.
> The sub classes then just act as wrappers.
> 3. Replace the subclasses with PopupPanelFactory with 2 methods
> newLabelLinkedPopup() and newImageLinkedPopup.
>
> I don't think a border suits this requirement but I'm not sure. Is there
> a better way?
>
> Thanks
> Ravi
>
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