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How to disable some javaFX ComboBox elements?

Can someone show me how to disable some element of my combobox (with FXML or Java code)? here is my ComboBox:

<ComboBox fx:id="cBox"> <items> <FXCollections fx:factory="observableArrayList"> <String fx:value="Easy" /> <String fx:value="Normal" /> <String fx:value="Hard" /> </FXCollections> </items> </ComboBox>

Thanks!

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I did not find any methods that may be inactive ComboBox . You can try this work, below the code - display a list of elements dynamically (use this idea to solve your problem).

 private final ObservableList<String> allOptions = FXCollections.observableArrayList("Easy","Normal","Hard"); // method which returns sublist we need private ObservableList<String> getSubList(int start,int end) { final ObservableList<String> toBeDisplayedList = FXCollections .<String> observableArrayList(); toBeDisplayedList.addAll(allOptions.subList(start, end)); return toBeDisplayedList; } // now main logic if(displayAll) { comboBox.setItems(allOptions); } if(display only easy and normal) { comboBox.setItems(getSublist(0,2)); } ...
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I tried to achieve this, and I came up with a special ComboBox that disables items that I don't want to select. Below is the code for the custom class ComboBox and its use.

  public class CustomComboBox<T> extends ComboBox<T> { private ArrayList<T> disabledItems = new ArrayList<T>(); public CustomComboBox() { super(); setup(); } public CustomComboBox(ObservableList<T> list) { super(list); setup(); } private void setup() { SingleSelectionModel<T> model = new SingleSelectionModel<T>() { @Override public void select(T item) { if (disabledItems.contains(item)) { return; } super.select(item); } @Override public void select(int index) { T item = getItems().get(index); if (disabledItems.contains(item)) { return; } super.select(index); } @Override protected int getItemCount() { return getItems().size(); } @Override protected T getModelItem(int index) { return getItems().get(index); } }; Callback<ListView<T>, ListCell<T>> callback = new Callback<ListView<T>, ListCell<T>>() { @Override public ListCell<T> call(ListView<T> param) { final ListCell<T> cell = new ListCell<T>() { @Override public void updateItem(T item, boolean empty) { super.updateItem(item, empty); if (item != null) { setText(item.toString()); if (disabledItems.contains(item)) { setTextFill(Color.LIGHTGRAY); setDisable(true); } } else { setText(null); } } }; return cell; } }; setSelectionModel(model); setCellFactory(callback); } public void setDisabledItems(T... items) { for (int i = 0; i < items.length; i++) { disabledItems.add(items[i]); } } }

Then add items to disable in the ComboBox:

 @FXML private CustomComboBox<String> customComboBox; ... customComboBox.setDisabledItems("Item 2", "Item 3");

And change the class in the fxml file:

 <views.custom.CustomComboBox ... />
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 comboBox.setItems(FXCollections.observableArrayList(EnumValues.values())); comboTipoOperacoes.getItems().remove(4); // remove the item 4 of Enums.
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I had the same problem, and I believe that the best solution to this problem is to use the setCellFactory (Callback, ListCell> value) method of the ComboBox:

  cBox.setCellFactory(new Callback<ListView<String>, ListCell<String>>() { @Override public ListCell<String> call(ListView<String> param) { return new ListCell<String>() { @Override protected void updateItem(String item, boolean empty) { super.updateItem(item, empty); if (item != null || !empty) { this.setText(item); this.setDisable(true); //or false } } }; } });

and if you want custon ButtonCel, you need to use setButtonCell (ListCell value) Method:

  cBox.setButtonCell(new ListCell<String>() { @Override protected void updateItem(Stringitem, boolean empty) { super.updateItem(item, empty); if (item != null || !empty) { this.setText(item); this.setDisable(true); //or false } } });
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