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 > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org > For additional commands, e-mail: users-h...@wicket.apache.org > > > -- View this message in context: http://old.nabble.com/Repost%3A-Track-selected-entries-in-either-of-a-Palette%27s-Choices-components--tp26922651p27432901.html Sent from the Wicket - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org