org.openempi.webapp.client.ui.mainpane.HeaderPane.java Source code

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Here is the source code for org.openempi.webapp.client.ui.mainpane.HeaderPane.java

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/**
 *
 * Copyright (C) 2002-2012 "SYSNET International, Inc."
 * support@sysnetint.com [http://www.sysnetint.com]
 *
 * This file is part of OpenEMPI.
 *
 * OpenEMPI is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.openempi.webapp.client.ui.mainpane;

import org.openempi.webapp.client.ClientState;
import org.openempi.webapp.client.ServiceRegistry;
import org.openempi.webapp.client.domain.Authentication;
import org.openempi.webapp.client.ui.widget.Pane;

import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.DockPanel;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.KeyboardListenerAdapter;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.PopupPanel;
import com.google.gwt.user.client.ui.PushButton;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * A {@link Pane} that shows the header of the main page. This header consists
 * of a title and a logout button/link.
 * 
 * Borrowed from Beginning Google Web Toolkit Book
 */
public class HeaderPane extends Pane {

    private PopupPanel confirmPopup;
    private DockPanel main;

    /**
     * Constructs a new HeaderPane that displays the given text.
     * 
     * @param titleText
     *            The text this header should show as a title.
     */
    public HeaderPane(String titleText, ClientState clientState, ServiceRegistry serviceRegistry) {
        super(clientState, serviceRegistry);
        main = new DockPanel();
        main.add(new Label("Brodkin's GWT Sample App"), DockPanel.CENTER);
        reset();
        initWidget(main);
        setStyleName("HeaderPane");
    }

    public void reset() {

        getServiceRegistry().getSecurityService().isLoggedIn(new AsyncCallback<Boolean>() {
            public void onFailure(Throwable caught) {
                throw new RuntimeException(caught);
            }

            public void onSuccess(Boolean result) {
                Boolean isLoggedIn = result;
                HorizontalPanel panel = buildHeaderPanel(isLoggedIn);
                main.remove(0);
                main.add(panel, DockPanel.EAST);
            }
        });
    }

    /**
     * Build this conditionally based on isLoggedIn
     * @param isLoggedIn
     * @return
     */
    private HorizontalPanel buildHeaderPanel(boolean isLoggedIn) {
        HorizontalPanel panel = new HorizontalPanel();
        if (isLoggedIn) {
            panel.setSpacing(10);
            panel.add(new Label("Welcome " + getClientState().getUserName()));

            PushButton logoutButton = new PushButton("Logout");
            logoutButton.setStyleName("LogoutButton");
            logoutButton.addClickListener(new ClickListener() {
                public void onClick(Widget sender) {
                    logout();
                }
            });
            panel.add(logoutButton);
        } else {
            PushButton loginButon = new PushButton("Login");
            loginButon.setStyleName("LoginButton");
            loginButon.addClickListener(new ClickListener() {
                public void onClick(Widget sender) {
                    showNewUserNameRequestPopupPanel();
                }
            });
            panel.add(loginButon);
        }
        return panel;
    }

    private void logout() {
        //      getServiceRegistry().getSecurityService().logout(
        //            new AsyncCallback<String>() {
        //               public void onFailure(Throwable caught) {
        //                  throw new RuntimeException(caught);
        //               }
        //
        //               public void onSuccess(String caught) {
        //                  reset();
        //               }
        //            });
    }

    private void login(String userName) {

        //      getServiceRegistry().getSecurityService().login(userName,
        //            new AsyncCallback<String>() {
        //               public void onFailure(Throwable caught) {
        //                  throw new RuntimeException(caught);
        //               }
        //
        //               //after we log them in, make another call to get their name
        //               //and set it in the ClientState.  This is inefficient, but it 
        //               //demonstrates making two asynchronous calls serially
        //               public void onSuccess(String caught) {
        //                  getServiceRegistry().getSecurityService().getCurrentAuthentication(
        //                  (new AsyncCallback<Authentication>() {
        //                     public void onFailure(Throwable caught) {
        //                        throw new RuntimeException(caught);
        //                     }
        //                     public void onSuccess(Authentication authentication) {
        //                        getClientState().setUserName(authentication.getUsername());
        //                        reset();
        //                     }
        //                  }));
        //               }
        //            });

    }

    private void showNewUserNameRequestPopupPanel() {
        confirmPopup = new PopupPanel(false, true);
        VerticalPanel panel = new VerticalPanel();
        panel.add(new Label("What is your login Name?"));
        final TextBox textBox = new TextBox();
        panel.add(textBox);
        Button ok = new Button("OK");
        ok.addClickListener(new ClickListener() {
            public void onClick(Widget w) {
                confirmPopup.hide();
                login(textBox.getText());
            }
        });

        panel.add(ok);
        confirmPopup.add(panel);
        confirmPopup.center();
        textBox.setFocus(true);
        confirmPopup.show();
    }
}