Scrollpane content moving in pane.Lock the content - javafx

Question

This is my sample code, In my project I have used scroll pane, but i am click outside of node and use arrow keys that nodes are move to Center,left,right,bottom.how to lock the node in same position,
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.ScrollPane;
import javafx.scene.control.TextField;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
/**
*
* #author reegan
*/
public class ComboBoxEditable extends Application {
Node sub;
#Override
public void start(Stage primaryStage) {
ComboBox mainCombo = new ComboBox(listofCombo());
Button save = new Button("Save");
sub = new ComboBox(listofCombo());
HBox root = new HBox(20);
root.getChildren().addAll(mainCombo, sub,save);
ScrollPane pane = new ScrollPane(root);
mainCombo.getSelectionModel().selectedItemProperty().addListener(new ChangeListener() {
#Override
public void changed(ObservableValue observable, Object oldValue, Object newValue) {
if (newValue == "Others") {
sub = new TextField();
} else {
sub = new ComboBox(listofCombo());
}
root.getChildren().remove(1);
root.getChildren().add(1, sub);
}
});
save.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println(mainCombo.getValue());
if(sub.getClass() == ComboBox.class) {
ComboBox sub1 = (ComboBox)sub;
System.out.println(sub1.getValue());
} else {
TextField field = (TextField)sub;
System.out.println(field.getText());
}
}
});
Scene scene = new Scene(pane, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
public ObservableList listofCombo() {
ObservableList<String> list = FXCollections.observableArrayList();
for (int i = 0; i < 10; i++) {
list.add(String.valueOf("Hello" + i));
}
list.add("Others");
return list;
}
}
I am ref this example code :JavaFX: scrolling vs. focus traversal with arrow keys

Answer 1

#James_D told "The default behavior for a scroll pane is that, if it has keyboard focus, the cursor (arrow) keys will cause it to scroll".So consume that event Ref for this solution JavaFX: scrolling vs. focus traversal with arrow keys
/*
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* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package comboboxeditable;
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ComboBox;
import javafx.scene.control.ScrollPane;
import javafx.scene.control.TextField;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
/**
*
* #author reegan
*/
public class ComboBoxEditable extends Application {
Node sub;
#Override
public void start(Stage primaryStage) {
ComboBox mainCombo = new ComboBox(listofCombo());
Button save = new Button("Save");
sub = new ComboBox(listofCombo());
HBox root = new HBox(20);
root.getChildren().addAll(mainCombo, sub, save);
ScrollInterceptor pane = new ScrollInterceptor(root);
mainCombo.getSelectionModel().selectedItemProperty().addListener(new ChangeListener() {
#Override
public void changed(ObservableValue observable, Object oldValue, Object newValue) {
if (newValue == "Others") {
sub = new TextField();
} else {
sub = new ComboBox(listofCombo());
}
root.getChildren().remove(1);
root.getChildren().add(1, sub);
}
});
save.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println(mainCombo.getValue());
if (sub.getClass() == ComboBox.class) {
ComboBox sub1 = (ComboBox) sub;
System.out.println(sub1.getValue());
} else {
TextField field = (TextField) sub;
System.out.println(field.getText());
}
}
});
Scene scene = new Scene(pane, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
public ObservableList listofCombo() {
ObservableList<String> list = FXCollections.observableArrayList();
for (int i = 0; i < 10; i++) {
list.add(String.valueOf("Hello" + i));
}
list.add("Others");
return list;
}
private static class ScrollInterceptor extends ScrollPane {
public ScrollInterceptor() {
remapArrowKeys(this);
}
public ScrollInterceptor(Node content) {
ScrollInterceptor.this.setContent(content);
remapArrowKeys(this);
}
private void remapArrowKeys(ScrollPane scrollPane) {
scrollPane.addEventFilter(KeyEvent.ANY, new EventHandler<KeyEvent>() {
#Override
public void handle(KeyEvent event) {
switch (event.getCode()) {
case UP:
case DOWN:
case LEFT:
case RIGHT:
event.consume();
}
}
});
}
}
}