java - 如何停止箭头键导航控件

Question

我试图阻止箭头键在我的示例中的控件中导航。我不知道该怎么做。这是我创建的示例:

import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.FlowPane;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class KeyEventTest extends Application{

    private EventHandler<KeyEvent> keyEventHandler;

    @Override
    public void start(Stage stage) throws Exception {
        // TODO Auto-generated method stub
        Group root = new Group();
        FlowPane f = new FlowPane();
        Button r = new Button("button1");
        Button r2 = new Button("button1");
        Button r3 = new Button("button1");
        f.getChildren().addAll(r,r2,r3);
        root.getChildren().add(f);
        Scene scene = new Scene(root,600,600);
        keyEventHandler = new EventHandler<KeyEvent>() {
            public void handle(final KeyEvent keyEvent) {
                if (keyEvent.getCode() == KeyCode.LEFT || keyEvent.getCode() == KeyCode.UP) {
                    System.out.println("arrow keys");
                }else{
                    System.out.println(keyEvent);
                }
            }
        };
        stage.addEventHandler(KeyEvent.KEY_PRESSED, keyEventHandler);


        stage.setScene(scene);
        stage.show();
    }

    public static void main(String args[]){
        Application.launch(args);
    }

}

如有任何帮助，我们将不胜感激谢谢

Answer 1

我遇到了类似的问题并找到了一个简单的解决方法。由于导航 Part 的控件在自行实现的 EventHandler 之后触发，因此您可以通过调用

来停止 KeyEvent 的任何进一步传播

    keyevent.consume()

在handle()方法的末尾。