GWT中的ENTER处理程序

Question

I'm new in Google web toolkit. I should implement a button "enter key" in my project. Can you please help me?

In the login menu there is a click handler, on which the user enters her login information and be able to press "enter" afterward.

Code I have so far:

Button btnLogin = new Button("Login");
    btnLogin.addListener(new ButtonListenerAdapter() {
        public void onClick(Button button, EventObject e) {
            Date date = new Date();
            Cookies.setCookie("user", username.getValueAsString(), date);
            Cookies.setCookie("pass", password.getValueAsString(), date);               
            Cookies.setCookie("save_login", checkbox.getValueAsString(), date);

            formPanel.getForm().submit("Login", null, Connection.POST, "Logging...", false);
        }           
    });

Answer 1

If you like to submit the data , when the user uses the enter key, just add a KeyUpHandler to your button:

   button.addKeyUpHandler(new KeyUpHandler() {
      @Override
      public void onKeyUp(KeyUpEvent event) {
        if (event.getNativeKeyCode() == KeyCodes.KEY_ENTER) {
          // do submit form
        }
      }
    });

You should use Handler instead of listener. Listener are old school and starting with GWT 2.0 deprecated.