CODEWITHSUNDEEP
javajavafxcomboboxscenebuilder
Moe
Moe

Reputation: 1537

Scene Builder , how to pair ComboBoxs selection

Using jdk1.7.0_80.jdk: I have 2 ComboBoxes; I want to select a value from the mainComboBox and subCombobox gets loaded automatically based on the value selected from the mainComboBox. and with its unique set of choices in the subComboBox: My initialization works as seen in the screenshot below. enter image description here

Now my issue is when I change the value of the mainComboBox. when I do that nothing gets preselected/displayed in the subComoboBox. I am using comboBoxChoice to load the different options available in the ObservableList. But for some odd reason it's not kicking in.

enter image description here 

public class FXMLDocumentController implements Initializable {
    ObservableList<String> mainList = FXCollections.observableArrayList("Main-1","Main-2","Main-3");
     ObservableList<String> main1SubList = FXCollections.observableArrayList("Main1-Sub1","Main1-Sub2","Main1-Sub3");
     ObservableList<String> main2SubList = FXCollections.observableArrayList("Main2-Sub1","Main2-Sub2","Main2-Sub3");
     ObservableList<String> main3SubList = FXCollections.observableArrayList("Main3-Sub1","Main3-Sub2","Main3-Sub3");


    @FXML
    private ComboBox mainComboBox, subComboBox;


   @Override 
    public void initialize(URL url, ResourceBundle rb) {
        mainComboBox.setValue("Main-1");
        mainComboBox.setItems(mainList);

        subComboBox.setValue("Main1-Sub1");
       subComboBox.setItems(main1SubList);
     }    

    @FXML
    private void comboBoxChoice() {
        if (mainComboBox.getValue().equals("Main-1") ) {
            subComboBox.setValue("Main1-Sub1");
            subComboBox.setItems(main1SubList);
        }
        if (mainComboBox.getValue().equals("Main-2") ) {
            subComboBox.setValue("Main2-Sub1");
            subComboBox.setItems(main2SubList);
        }
        if (mainComboBox.getValue().equals("Main-3") ) {
            subComboBox.setValue("Main3-Sub1");
            subComboBox.setItems(main3SubList);
        }

    }
}

FXML file:

<AnchorPane id="AnchorPane" prefHeight="200" prefWidth="320" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="javafxapplication18.FXMLDocumentController">
    <children>
        <Label fx:id="label" layoutX="126" layoutY="120" minHeight="16" minWidth="69" />
      <ComboBox fx:id="mainComboBox" layoutX="103.0" layoutY="136.0" onAction="#comboBoxChoice" prefWidth="150.0" />
      <ComboBox fx:id="subComboBox" layoutX="103.0" layoutY="162.0" prefWidth="150.0" />
    </children>
</AnchorPane>

Upvotes: 0

Views: 70

Answers (1)

James_D
James_D

Reputation: 209724

This works fine for me on JDK 1.8.0_66. It may be that this is an old bug that has since been fixed.

I would recommend switching the order of setItems() and setValue(); it's likely that replacing all the items removes the old selected item, even if it is in the "new" list.

I.e.

@FXML
private void comboBoxChoice() {
    if (mainComboBox.getValue().equals("Main-1") ) {
        subComboBox.setItems(main1SubList);
        subComboBox.setValue("Main1-Sub1");
    }
    if (mainComboBox.getValue().equals("Main-2") ) {
        subComboBox.setItems(main2SubList);
        subComboBox.setValue("Main2-Sub1");
    }
    if (mainComboBox.getValue().equals("Main-3") ) {
        subComboBox.setItems(main3SubList);
        subComboBox.setValue("Main3-Sub1");
    }

}

Upvotes: 1

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