vaadin Layout 수동 교체?

최상위에 VerticalLayout에 로그인 관련 Component가 존재하고,

로그인을 하면 최상위 레이아웃의 모든 Component를 clear(?) 한 후 

다른 Component를 배치하는걸 해봤다. 그냥.. 아무런 이유는 없다.

 

package com.vseminar.vaadin_seminar2;

import java.util.regex.Pattern;

import javax.servlet.annotation.WebServlet;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.vaadin.annotations.Theme;
import com.vaadin.annotations.VaadinServletConfiguration;
import com.vaadin.annotations.Widgetset;
import com.vaadin.navigator.Navigator;
import com.vaadin.server.FontAwesome;
import com.vaadin.server.VaadinRequest;
import com.vaadin.server.VaadinServlet;
import com.vaadin.shared.ui.label.ContentMode;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.Button;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.Notification;
import com.vaadin.ui.Notification.Type;
import com.vaadin.ui.PasswordField;
import com.vaadin.ui.TextField;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.themes.ValoTheme;
import com.vseminar.vaadin_seminar2.util.Constants;

/**
 * This UI is the application entry point. A UI may either represent a browser window
 * (or tab) or some part of a html page where a Vaadin application is embedded.
 * <p>
 * The UI is initialized using {@link #init(VaadinRequest)}. This method is intended to be
 * overridden to add component to the user interface and initialize non-component functionality.
 */
/**
*
* Description
*
*
* @author @user
*
* @version 1.0.0
* @date 2018. 6. 16.
*=======================================================================
* Date            Name                     Revision History
*=======================================================================
* 2018. 6. 16.    hyperrookie@gmail.com    Creation
*=======================================================================
*/
@SuppressWarnings("serial")
@Theme("vseminar")
@Widgetset("com.vseminar.vaadin_seminar2.VSeminarWidgetset")
public class VSeminarUI extends UI {

	private static final Logger logger = LoggerFactory.getLogger(VSeminarUI.class);
	private Label message;
	Navigator navigator;

    @Override
    protected void init(VaadinRequest vaadinRequest) {

    	logger.debug("vaadinRequest ----------> {}", vaadinRequest);

        final VerticalLayout layout = new VerticalLayout();

        final VerticalLayout loginPanel = new VerticalLayout();
        loginPanel.setSizeUndefined();
        loginPanel.setSpacing(true);

        Label top = new Label("예쁜누나들은 어서오세요~<br />너는 아니다....",ContentMode.HTML);
        top.addStyleName(ValoTheme.LABEL_H4);
        top.addStyleName(ValoTheme.LABEL_COLORED);
        loginPanel.addComponent(top);

        message = new Label();
        message.setVisible(false);
        message.setSizeFull();
        message.setStyleName(ValoTheme.LABEL_H4);
        message.setStyleName(ValoTheme.LABEL_FAILURE);
        loginPanel.addComponent(message);

        final HorizontalLayout loginFileds = new HorizontalLayout();
        loginFileds.setSizeUndefined();
        loginFileds.setSpacing(true);

        final TextField email = new TextField("Email");
        email.setIcon(FontAwesome.USER);
        email.addStyleName(ValoTheme.TEXTFIELD_INLINE_ICON);
        email.addBlurListener(e->{
			if( email.getValue().length() > 0 && !Pattern.matches(Constants.REGEX_EMAIL, email.getValue())) {
				Notification.show(Constants.MSG_FORMAT_EMAIL, Type.WARNING_MESSAGE);
				email.focus();
				logger.debug("{}", email.getValue());
			}
        });
        email.setValue("user@userc.com");

        final PasswordField password = new PasswordField("Password");
        password.setIcon(FontAwesome.LOCK);
        password.addStyleName(ValoTheme.TEXTFIELD_INLINE_ICON);
        password.addBlurListener(e->{
			if (password.getValue().length() > 0 && !Pattern.matches(Constants.REGEX_PASSWORD, password.getValue())) {
				Notification.show(Constants.MSG_FORMAT_PASSWORD, Type.WARNING_MESSAGE);
				password.focus();
			}
		});
        password.setValue("1234Tabc!");

        final Button signon = new Button("signon");
        signon.setStyleName(ValoTheme.BUTTON_PRIMARY);
        signon.addClickListener(e->{

        	if ( !Pattern.matches(Constants.REGEX_EMAIL, email.getValue()) || !Pattern.matches(Constants.REGEX_PASSWORD, password.getValue()) ) {
        		logger.debug("{} / {}", email.getValue(),password.getValue());
        		message.setValue(Constants.MSG_FORMAT_ALL);
        		message.setVisible(true);
        		return;
        	}
        	layout.removeAllComponents();

        	final VerticalLayout dashBoard = new VerticalLayout();
    		  dashBoard.setSpacing(true);
    		  Label topTitle = new Label("DashBoard");
    		  topTitle.setSizeUndefined();
    		  dashBoard.addComponent(topTitle);
    		  dashBoard.setComponentAlignment(topTitle, Alignment.TOP_LEFT);
    		  layout.addComponent(dashBoard);
        });

        loginFileds.addComponents(email,password,signon);
        loginFileds.setComponentAlignment(signon, Alignment.BOTTOM_LEFT);

        loginPanel.addComponent(loginFileds);

        layout.addComponent(loginPanel);
        layout.setMargin(true);
        layout.setSpacing(true);
        layout.setSizeFull();
        layout.setComponentAlignment(loginPanel, Alignment.MIDDLE_CENTER);

        setContent(layout);
    }

    @WebServlet(urlPatterns = "/*", name = "VSeminarUIServlet", asyncSupported = true)
    @VaadinServletConfiguration(ui = VSeminarUI.class, productionMode = false)
    public static class VSeminarUIServlet extends VaadinServlet {
    }
}