Chosenbox save selected value to db and display selection into chosenbox

answered 2021-05-17 15:07:38 +0800

cor3000
6280 ● 2 ● 7

I assume you already know how to save/load data into your DB (since persistence layers are not part of ZK I'll not cover those details here)

If you're using Chosenbox I assume you use a ListModelList (or another ListModel implementation supporting Selectable) for the available items. By doing so this ListModelList can serve both your requirements.

e.g.:

ListModelList<String> namesModel = 
    new ListModelList<>(Arrays.asList("Adam", "Eve", "Harold", "Spencer"));
namesModel.setMultiple(true);

chosenBox.setModel(namesModel);

Now the user can pick from the available names in the model, the namesModel will keep track of the current selected names.

In order to retrieve the current selection (saving into DB) you call:

Set<String> selectedNames = namesModel.getSelection();
yourService.saveSelectedNames(selectedNames);

When loading a previous selection you simply add the loaded names to the selection of the names Model.

Collection<String> selectedNames = yourService.loadSelectedNames();
namesModel.setSelection(selectedNames);

or add/remove them one by one:

namesModel.clearSelection();
namesModel.addToSelection("Peter");
namesModel.addToSelection("Harold");
//namesModel.removeFromSelection("Peter");

Does this help? If you needed something different please consider providing some runnable code on https://zkfiddle.org/ and post the link here.