class InverseBooleanModel implements imodel<boolean>
private final imodel<boolean> delegate;
public inversebooleanmodel(imodel<boolean>delegate) {
this.delegate=delegate; }
public boolean getobject() {
return !delegate;
}
public void setobject(boolean o) {
delegate.setobject(!o);
}
public void detach() {
delegate.detach();
}
}
add(new checkbox("cb", new inversebooleanmodel(model)));
-igor
On Fri, Apr 24, 2009 at 8:11 AM, Ryan LaHue <[email protected]> wrote:
> I'm scratching my head trying to figure out the best way to reverse the
> behavior of a checkbox, i.e. display an unchecked box when the model behind
> is true, and a checked box when the model behind is false. I don't want to
> negate all my domain objects' getters/setters to accomodate this.
>
> I was going to override the CheckBox.getConverter class to point to an
> extension of CheckBoxConverter with an overridden convertToObject method and
> simply reverse the:
> if ("on".equals(value) || "true".equals(value))
> {
> return Boolean.TRUE;
> }
> else
> {
> return Boolean.FALSE;
> }
>
> Unfortunately the CheckBox.getConverter method is marked final, so this is
> not a possibility. I could override the onComponentTag method but I do not
> think it would be a good idea since there is a lot going on in there.
>
> Alternatively if there was a simple way to negate the value of the
> setter/getter in a PropertyModel I think that would do the trick, i.e.
> new CheckBox("checkbox", new PropertyModel(domainObject, "!blue"));
>
> Any suggestions?
>
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