com.google.livingstories.client.contentmanager.ContentManager.java Source code

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Here is the source code for com.google.livingstories.client.contentmanager.ContentManager.java

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/**
 * Copyright 2010 Google Inc.
 *
 * 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.google.livingstories.client.contentmanager;

import com.google.gwt.ajaxloader.client.AjaxLoader;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.event.logical.shared.BeforeSelectionEvent;
import com.google.gwt.event.logical.shared.BeforeSelectionHandler;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TabPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.livingstories.client.lsp.views.Resources;

/**
 * Entry point for the content manager to create and update documents and updates. 
 */
public class ContentManager implements EntryPoint {
    private TabPanel tabs;
    private int selectedIndex;

    private Widget livingStoryManager = new LivingStoryManager();
    private Widget themeManager = new ThemeManager();
    private Widget contentItemManager = new ContentItemManager();
    private Widget importManager = new ImportManager();

    public void onModuleLoad() {
        // Inject the contents of the living story page CSS file
        Resources.INSTANCE.css().ensureInjected();

        AjaxLoader.init();

        tabs = new TabPanel();
        tabs.setWidth("100%");

        tabs.add(contentItemManager, "Manage Content");
        tabs.add(livingStoryManager, "Manage Living Stories");
        tabs.add(themeManager, "Manage Themes");
        tabs.add(importManager, "Import/Export Data");

        tabs.selectTab(0);
        selectedIndex = 0;

        tabs.addBeforeSelectionHandler(new BeforeSelectionHandler<Integer>() {
            public void onBeforeSelection(BeforeSelectionEvent<Integer> event) {
                // TODO: this work is extra if the user didn't actually change
                // anything on the source tab.
                ManagerPane previousTab = (ManagerPane) tabs.getWidget(selectedIndex);
                boolean livingStoriesEdited = (previousTab == livingStoryManager);
                boolean contentItemsEdited = (previousTab == contentItemManager);
                for (int i = 0; i < tabs.getWidgetCount(); i++) {
                    ManagerPane pane = (ManagerPane) tabs.getWidget(i);
                    if (pane != previousTab) {
                        if (livingStoriesEdited) {
                            pane.onLivingStoriesChanged();
                        }
                        if (contentItemsEdited) {
                            pane.onContentItemsChanged();
                        }

                        pane.onShow();
                    }
                }
                selectedIndex = event.getItem();
            }
        });

        RootPanel.get().add(tabs);
    }
}