CODEWITHSUNDEEP
javavaadin
udakarajd
udakarajd

Reputation: 114

Vaadin TwinColSelect remove items from option column without removing selected column values

I have a situation where the user is prompted with a twin column selector. The options column is populated based on a selection of a combo box.

So, I need "options list" to change based on combo box selection. But I want the selected values to remain the same.

eg. combo box value = international
options column is populated international with users. 

combo box value = local
options column is populated with local users.

At the end, when I collecting the selected values, it may contain both local and international users.

Something like this:

twinColSelect.removeAllFromLeft();
twinColSelect.addItemsToLeft(internationlUsersList);

How do I achieve this? I tried the following approach; somehow I can get the selected values from the code. But from the frontend I can only see is selected values from the current options list.

myComboBox.addValueChangeListener(event1 -> {

    Object value = twinColSelect.getValue();
    twinColSelect.removeAllItems();
    myComboBox.getValue.getUsers().forEach(ob -> twinColSelect.addItem(ob.getUserName()));
    twinColSelect.setValue(value);
});

Upvotes: 0

Views: 1128

Answers (1)

udakarajd
udakarajd

Reputation: 114

I found a workaround. It's not perfect, but it gets the job done.

This is what I did, before removing all items, I saved the selected values. Then remove all items. After that, I added my 'new values' and previously saved 'selected values' to the item list.

Then it was possible to set selected values to the list

Object selectedValues=twinSelect.getValue();

twinSelect.removeAllItems();

twinSelect.addItems(newITemsList);

(Collection<?>selectedValues.forEach(o ->twinSelect.addItem(o));

twinSelect.setValue(selectedValues);

Upvotes: 0

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