com.gwos.client.ui.desktop.GwosDesktop.java Source code

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Here is the source code for com.gwos.client.ui.desktop.GwosDesktop.java

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/*
 * Copyright 2013 - Elian ORIOU
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package com.gwos.client.ui.desktop;

import com.extjs.gxt.ui.client.widget.ContentPanel;
import com.google.gwt.event.logical.shared.CloseEvent;
import com.google.gwt.event.logical.shared.CloseHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.Window.ClosingEvent;
import com.google.gwt.user.client.ui.Composite;
import com.gwos.client.apps.tools.ShortcutsManager;
import com.gwos.client.auth.SessionManager;

public class GwosDesktop extends Composite {

    private static GwosDesktop _INSTANCE;
    private String wallpaperName;

    private ContentPanel rootPanel;
    private final WindowsArea wArea;
    private final IconsArea iArea;
    private final TasksBar tBar;

    private GwosDesktop() {

        rootPanel = new ContentPanel();
        wArea = new WindowsArea();
        iArea = new IconsArea();
        tBar = new TasksBar();
        render();
        initWidget(rootPanel);
    }

    public static GwosDesktop getInstance() {
        if (_INSTANCE == null) {
            _INSTANCE = new GwosDesktop();
        }
        return _INSTANCE;
    }

    private final void render() {
        // Rendering the desktop
        rootPanel.setHeaderVisible(false);
        rootPanel.setBodyBorder(false);
        setWallpaper("desktop-wallpaper-tux", true);

        // 1. The center : icons area (on background) & windows area (on
        // foreground)
        rootPanel.add(iArea);

        // 2. The bottom : task bar
        rootPanel.add(tBar);

        // 3. Initialize shortcuts
        ShortcutsManager.getInstance().initGlobalHandler();

        // 4. Initialize the browser handler
        setBrowserClosingHandler();

        // 5. Initialize the message displayer
        SystemMessageDisplayer.listenToMessages();
    }

    private void setBrowserClosingHandler() {

        Window.addWindowClosingHandler(new Window.ClosingHandler() {
            @Override
            public void onWindowClosing(ClosingEvent event) {
                if (SessionManager.getInstance().isUserLogged() == false) {
                    return;
                }
                // Request confirmation to the user when he close his browser
                event.setMessage("Changes on your session will be lost. Are you sure ?");
            }
        });

        Window.addCloseHandler(new CloseHandler<Window>() {
            @Override
            public void onClose(CloseEvent<Window> event) {
                if (SessionManager.getInstance().isUserLogged() == false) {
                    return;
                }
                // Before the browser is closed, save the session !
                SessionManager.getInstance().logout();
            }
        });
    }

    public void setWallpaper(String styleName, boolean init) {
        // Initialization phase
        if (init) {
            rootPanel.setBodyStyleName(styleName);
        }
        // When the root panel is already rendered => change body style directly
        else {
            rootPanel.getBody().setStyleName(styleName);
        }
    }

    public String getWallPaperName() {
        return wallpaperName;
    }

    public ContentPanel getRootPanel() {
        return rootPanel;
    }

    public WindowsArea getWindowArea() {
        return wArea;
    }

    public IconsArea getIconsArea() {
        return iArea;
    }

    public TasksBar getTaskBar() {
        return tBar;
    }
}