CODEWITHSUNDEEP
javacomboboxjavafx-2javafxjavafx-8
Shreyas Dave
Shreyas Dave

Reputation: 3855

Set focus on a specific item of a combobox without selecting it

I am trying to make a ComboBox which has a functionality of search a match from its items.

Here is a code sample of what I have done,

ObservableList<String> ab = FXCollections.observableArrayList("z", "asxdf", "abasdf", "bcasdf", "b", "bc", "bcd", "c");

final ComboBox box = new ComboBox(ab);
box.setEditable(true);

box.setOnKeyReleased(new EventHandler<KeyEvent>() {
   @Override
   public void handle(KeyEvent t) {

      box.show();

      for (String item : items) {
         if (item.startsWith(box.getEditor().getText())) {

             box.getSelectionModel().select(item); //which selects the item.

             break;
         }
      }
   }
});

Now the problem is box.getSelectionModel().select(item); selects that specific item which is typed in the ComboBox, but I don't want to select that item, I just want to hover on (focus on) that item like when mouse hovers.

Can anyone tell me the code to replace with box.getSelectionModel().select(item); and help me solve this problem.

Upvotes: 1

Views: 4195

Answers (2)

bpiv
bpiv

Reputation: 21

to reply late, but I only faced that issue today after I migrated a hole application from Swing to FX. I am using Java 8. (still)

This is how I made it work. Hope it is will help in case someone still has this issue.

public class MyComboBox extends ComboBox<String> {
    public EditorComboBox() {

        // this event is created when the internal listView is displayed
        setOnShowing(event -> {
            ComboBoxListViewSkin<?> skin = (ComboBoxListViewSkin<?>)getSkin();
            if (skin != null) {
                ((ListView<?>) skin.getPopupContent()).scrollTo(getSelectionModel().getSelectedIndex());
            }
        });
    }
}

Upvotes: 2

ttulka
ttulka

Reputation: 10892

You can get the ListView from the ComboBox by this code:

ListView<?> lv = ((ComboBoxListViewSkin) getSkin()).getListView();

Then you can focus to the item:

lv.getFocusModel().focus(N);

or just scroll to it:

lv.scrollTo(N)

Upvotes: 6

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