CODEWITHSUNDEEP
javajavafx
Dave
Dave

Reputation: 108

Get last selected item of a ListView in JavaFX

I need to get the last selected item of a ListView which is in MultipleSelectionMode in JavaFX. My code is below but it does not give me the last selected item. It seems to give a random item from the selected items.

addDocumentPagesListView.getSelectionModel().getSelectedItems().addListener(new ListChangeListener<PageFile>() {

        @Override
        public void onChanged(ListChangeListener.Change<? extends PageFile> change) {
            while (change.next()) {

                if (change.wasAdded()) {
                    List <? extends PageFile> l = change.getAddedSubList();
                    Object o = l.get(l.size() - 1);                        
                    PageFile pf = (PageFile) o;
                    System.out.println("Showing pdf file: " + pf.getFile().getName());
                 }
            }
        }
    });

Upvotes: 1

Views: 2169

Answers (2)

Dave
Dave

Reputation: 108

The code below works, the only problem is that when making a multiple selection two events that are marked as change.wasAdded() are called for each multiple selection.

if (change.wasAdded()) {
    List<? extends PageFile> l = change.getList();
    Object o = l.get(l.size() - 1);
    if (o != null) {
        PageFile pf = (PageFile) o;
        System.out.println("Showing pdf file: " + pf.getFile().getName());
    }
} else if (change.wasRemoved()) {
    List<? extends PageFile> l = change.getList();
    Object o = l.get(l.size() - 1);
    if (o != null) {
        PageFile pf = (PageFile) o;
        System.out.println("Showing pdf file: " + pf.getFile().getName()); 
    }
}

Upvotes: 1

assylias
assylias

Reputation: 328649

You should have a look at the selectedItemProperty which always points to the last selected item:

The selected item property is most commonly used when the selection model is set to be single selection, but is equally applicable when in multiple selection mode. When in this mode, the selected item will always represent the last selection made.

Upvotes: 2

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