it.unibo.cs.v2.client.FlozConfigurator.java Source code

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Here is the source code for it.unibo.cs.v2.client.FlozConfigurator.java

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/* Copyright 2011 Massimo Gengarelli <gengarel@cs.unibo.it>
 * This file is part of Floz Configurator.
 * Floz Configurator is free software: you can redistribute it and/or modify it 
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or 
 * (at your option) any later version.
 *
 * Floz Configurator 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License 
 * along with Floz Configurator. If not, see http://www.gnu.org/licenses/.
 */

package it.unibo.cs.v2.client;

import it.unibo.cs.v2.servlets.GetUserInfo;
import it.unibo.cs.v2.servlets.GetUserInfoAsync;

import java.util.HashMap;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.user.client.Cookies;
import com.google.gwt.user.client.History;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.DockLayoutPanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Panel;
import com.google.gwt.user.client.ui.RootLayoutPanel;
import com.google.gwt.user.client.ui.ScrollPanel;

/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class FlozConfigurator extends DockLayoutPanel implements EntryPoint {
    public FlozConfigurator() {
        super(Unit.EM);
    }

    private final String COPYRIGHT = "<b>Live ShockVM is part of the VirtuaCluster, "
            + "Copyright (C) 2011 - Massimo Gengarelli " + "&lt;gengarel@cs.unibo.it&gt;</b>";

    private final HTML footerHTML = new HTML("<div id=\"footer\">" + COPYRIGHT + "</div>");

    private GetUserInfoAsync userInfoProxy = (GetUserInfoAsync) GWT.create(GetUserInfo.class);

    private HashMap<String, String> userInfo;

    /**
     * It's nice to keep'em in memory for low-costs accesses
     */
    private MainPage mainPage;
    private MainPanel leftPanel;

    /**
     * Points to the widget that is set in the center of the DockLayoutPanel
     */
    private Panel centerWidget;

    /**
     * This is called by the GWT EntryPoint interface
     */
    @Override
    public void onModuleLoad() {
        History.newItem(HistoryTokens.START, false);
        getElement().setAttribute("id", "mainPanel");

        addNorth(new HTML("<div id=\"Header\"> " + "<h1>Live ShockVM</h1>" + "</div>"), 6);

        footerHTML.getElement().getStyle().setMarginTop(3, Unit.EM);

        addSouth(footerHTML, 4);

        RootLayoutPanel.get().add(this);

        showLoginTable();
    }

    /**
     * Shows a nice Login form
     */
    private void showLoginTable() {
        final LoginPage login = new LoginPage();
        centerWidget = (Panel) login;
        centerWidget.getElement().setAttribute("id", "loginPage");
        final Image loadingImage = new Image("/loading.gif");

        login.add(loadingImage);

        login.setAsyncCallback(new Loader<Boolean>(loadingImage) {
            @Override
            public void onCustomSuccess(Boolean result) {
                if (result == true) {
                    remove(login);

                    Cookies.setCookie("login", login.getProvidedLogin());

                    userInfoProxy.getUserInfo(new Loader<HashMap<String, String>>(loadingImage) {
                        @Override
                        public void onCustomFailure(Throwable caught) {
                            Window.alert("RPC Failure while getting user infos, refresh the page");
                        }

                        @Override
                        public void onCustomSuccess(HashMap<String, String> result) {
                            userInfo = result;
                            showMainPage();
                        }
                    });

                }

                else
                    login.showError("Login failed");
            }

            @Override
            public void onCustomFailure(Throwable caught) {
                Window.alert("RPC Failed, try reloading the page");
            }
        });

        loadingImage.setVisible(false);
        add(centerWidget);
    }

    /**
     * Main Page (if user is logged in)
     */
    private void showMainPage() {
        mainPage = MainPage.getInstance();
        mainPage.getElement().getStyle().setMarginRight(3, Unit.EM);
        History.addValueChangeHandler(mainPage);
        leftPanel = new MainPanel(userInfo);
        addWest(leftPanel, 23);
        add(new ScrollPanel(mainPage));

        leftPanel.setVisible(true);
        mainPage.setVisible(true);

        animate(1500);
    }
}