Question

I need to add a listbox / combobox which allows the user to choose several values.

I know there is one already available in the GWT API
ListBox
with isMultipleSelect() set to true. But I am not getting any direct way to get all selected reocrds from list box.

Some tutorials on google are sugeesting implement ChangeHandler‘s onChangemethod.

I think there should be some other way.

Any pointers would be appreciated.

Answer 1

Create your own small subclass of ListBox offering a method like

public LinkedList<Integer> getSelectedItems() {
    LinkedList<Integer> selectedItems = new LinkedList<Integer>();
    for (int i = 0; i < getItemCount(); i++) {
        if (isItemSelected(i)) {
            selectedItems.add(i);
        }
    }
    return selectedItems;
}

The GWT API does not offer a direct way.