Hi,
I want to disable all preselected enteries in 'selected' choice box(so that
user can't move those choices to available list). Please suggest some
solution.
I have tried one solution, by overriding inBeforeRender method and in that
method i've get 'selectedChoicesComponent' and disable all childs, but i am
getting null for selectedChoicesComponent.
@Override
protected void onBeforeRender() {
super.onBeforeRender();
Selection<T> selectedChoicesComponent =
(Selection<T>)getSelectionComponent();
//Just to check, i have disabled 1st child,if it works we can easliy
disable other childs
selectedChoicesComponent.get(0).setEnabled(false);
}
getSelectionComponent() - returns null.
Thanks,
Dhiraj
Martin Dietze wrote:
>
> On Fri, December 25, 2009, Martin Dietze wrote:
>
>> I desperately need to find out which entries in a Palette's two
>> Choices components are selected, e.g. to allow additional
>> operations on them using Ajax.
>
> I solved this issue. First of all: currently the AbstractOptions
> class used by Palette does not support accessing this
> information via Ajax because of these lines:
>
> | // A piece of javascript to avoid serializing the options during AJAX
> | // serialization.
> | getResponse().write(
> | JavascriptUtils.SCRIPT_OPEN_TAG +
> | "if (typeof(Wicket) != \"undefined\" &&
> typeof(Wicket.Form) != \"undefined\")" +
> | " Wicket.Form.excludeFromAjaxSerialization." +
> getMarkupId() + "='true';" +
> | JavascriptUtils.SCRIPT_CLOSE_TAG);
>
> Thus, in order to get this working at all, we'll have to patch
> Wicket. The patch is very simple, we move this code into a
> separate method which can be overridden by derived classes.
> I created an issue for this and attached the patch [1].
>
> Now having applied the patch we proceed as follows.
> First, we need to derive our own Choices and Selection
> components in which we override the above code by an empty
> method, so that we get the selection POSTed at all. Now
> we can override various methods as needed; in my case
> implementing a custom convertInput() method was sufficient,
> so that I could access the currently selected entries in
> the two SELECTs by calling their getConvertedInput() methods
> which seemed the least invasive change and least likely to
> cause any trouble with the Palette's core functionality.
>
> Next, I derived my own custom class from Palette in which
> I needed to override the factory methods for creating the
> Choices and Selection components. Pretty easy in the end.
>
> Cheers,
>
> M'bert
>
> [1]
> https://issues.apache.org/jira/secure/ManageAttachments.jspa?id=12444712
>
> --
> ----------- / http://herbert.the-little-red-haired-girl.org /
> -------------
> =+=
> Perl ist der gegl�ckte Versuch, einen braindump direkt ausf�hrbar zu
> machen. -- Lutz Donnerhacke in dasr
>
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