showcase.java

Google Web Toolkit (GWT)

/*
 * Copyright 2008 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.gwt.sample.showcase.client;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.HeadElement;
import com.google.gwt.dom.client.Node;
import com.google.gwt.dom.client.NodeList;
import com.google.gwt.i18n.client.LocaleInfo;
import com.google.gwt.sample.showcase.client.Application.ApplicationListener;
import com.google.gwt.sample.showcase.client.content.i18n.CwConstantsExample;
import com.google.gwt.sample.showcase.client.content.i18n.CwConstantsWithLookupExample;
import com.google.gwt.sample.showcase.client.content.i18n.CwDateTimeFormat;
import com.google.gwt.sample.showcase.client.content.i18n.CwDictionaryExample;
import com.google.gwt.sample.showcase.client.content.i18n.CwMessagesExample;
import com.google.gwt.sample.showcase.client.content.i18n.CwNumberFormat;
import com.google.gwt.sample.showcase.client.content.lists.CwListBox;
import com.google.gwt.sample.showcase.client.content.lists.CwMenuBar;
import com.google.gwt.sample.showcase.client.content.lists.CwStackPanel;
import com.google.gwt.sample.showcase.client.content.lists.CwSuggestBox;
import com.google.gwt.sample.showcase.client.content.lists.CwTree;
import com.google.gwt.sample.showcase.client.content.other.CwAnimation;
import com.google.gwt.sample.showcase.client.content.other.CwCookies;
import com.google.gwt.sample.showcase.client.content.panels.CwAbsolutePanel;
import com.google.gwt.sample.showcase.client.content.panels.CwDecoratorPanel;
import com.google.gwt.sample.showcase.client.content.panels.CwDisclosurePanel;
import com.google.gwt.sample.showcase.client.content.panels.CwDockPanel;
import com.google.gwt.sample.showcase.client.content.panels.CwFlowPanel;
import com.google.gwt.sample.showcase.client.content.panels.CwHorizontalPanel;
import com.google.gwt.sample.showcase.client.content.panels.CwHorizontalSplitPanel;
import com.google.gwt.sample.showcase.client.content.panels.CwTabPanel;
import com.google.gwt.sample.showcase.client.content.panels.CwVerticalPanel;
import com.google.gwt.sample.showcase.client.content.panels.CwVerticalSplitPanel;
import com.google.gwt.sample.showcase.client.content.popups.CwBasicPopup;
import com.google.gwt.sample.showcase.client.content.popups.CwDialogBox;
import com.google.gwt.sample.showcase.client.content.tables.CwFlexTable;
import com.google.gwt.sample.showcase.client.content.tables.CwGrid;
import com.google.gwt.sample.showcase.client.content.text.CwBasicText;
import com.google.gwt.sample.showcase.client.content.text.CwRichText;
import com.google.gwt.sample.showcase.client.content.widgets.CwBasicButton;
import com.google.gwt.sample.showcase.client.content.widgets.CwCheckBox;
import com.google.gwt.sample.showcase.client.content.widgets.CwCustomButton;
import com.google.gwt.sample.showcase.client.content.widgets.CwFileUpload;
import com.google.gwt.sample.showcase.client.content.widgets.CwHyperlink;
import com.google.gwt.sample.showcase.client.content.widgets.CwRadioButton;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.History;
import com.google.gwt.user.client.HistoryListener;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.AbstractImagePrototype;
import com.google.gwt.user.client.ui.ChangeListener;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TabBar;
import com.google.gwt.user.client.ui.ToggleButton;
import com.google.gwt.user.client.ui.Tree;
import com.google.gwt.user.client.ui.TreeItem;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class Showcase implements EntryPoint {
  /**
   * The type passed into the
   * {@link com.google.gwt.sample.showcase.generator.ShowcaseGenerator}.
   */
  private static final class GeneratorInfo {
  }

  /**
   * A special version of the ToggleButton that cannot be clicked if down. If
   * one theme button is pressed, all of the others are depressed.
   */
  private static class ThemeButton extends ToggleButton {
    private static List<ThemeButton> allButtons = null;

    private String theme;

    public ThemeButton(String theme) {
      super();
      this.theme = theme;
      addStyleName("sc-ThemeButton-" + theme);

      // Add this button to the static list
      if (allButtons == null) {
        allButtons = new ArrayList<ThemeButton>();
        setDown(true);
      }
      allButtons.add(this);
    }

    public String getTheme() {
      return theme;
    }

    @Override
    protected void onClick() {
      if (!isDown()) {
        // Raise all of the other buttons
        for (ThemeButton button : allButtons) {
          if (button != this) {
            button.setDown(false);
          }
        }

        // Fire the click listeners
        super.onClick();
      }
    }
  }

  /**
   * The static images used throughout the Showcase.
   */
  public static final ShowcaseImages images = (ShowcaseImages) GWT.create(ShowcaseImages.class);

  /**
   * The current style theme.
   */
  public static String CUR_THEME = ShowcaseConstants.STYLE_THEMES[0];

  /**
   * Get the URL of the page, without an hash of query string.
   * 
   * @return the location of the page
   */
  private static native String getHostPageLocation()
  /*-{
    var s = $doc.location.href;
  
    // Pull off any hash.
    var i = s.indexOf('#');
    if (i != -1)
      s = s.substring(0, i);
  
    // Pull off any query string.
    i = s.indexOf('?');
    if (i != -1)
      s = s.substring(0, i);
  
    // Ensure a final slash if non-empty.
    return s;
  }-*/;

  /**
   * The {@link Application}.
   */
  private Application app = new Application();

  /**
   * A mapping of history tokens to their associated menu items.
   */
  private Map<String, TreeItem> itemTokens = new HashMap<String, TreeItem>();

  /**
   * A mapping of menu items to the widget display when the item is selected.
   */
  private Map<TreeItem, ContentWidget> itemWidgets = new HashMap<TreeItem, ContentWidget>();

  /**
   * This is the entry point method.
   */
  public void onModuleLoad() {
    // Generate the source code and css for the examples
    GWT.create(GeneratorInfo.class);

    // Create the constants
    ShowcaseConstants constants = (ShowcaseConstants) GWT.create(ShowcaseConstants.class);

    // Swap out the style sheets for the RTL versions if needed.
    updateStyleSheets();

    // Create the application
    setupTitlePanel(constants);
    setupMainLinks(constants);
    setupOptionsPanel();
    setupMainMenu(constants);

    // Setup a history listener to reselect the associate menu item
    final HistoryListener historyListener = new HistoryListener() {
      public void onHistoryChanged(String historyToken) {
        TreeItem item = itemTokens.get(historyToken);
        if (item == null) {
          item = app.getMainMenu().getItem(0).getChild(0);
        }

        // Select the associated TreeItem
        app.getMainMenu().setSelectedItem(item, false);
        app.getMainMenu().ensureSelectedItemVisible();

        // Show the associated ContentWidget
        displayContentWidget(itemWidgets.get(item));
      }
    };
    History.addHistoryListener(historyListener);

    // Add an listener that sets the content widget when a menu item is selected
    app.setListener(new ApplicationListener() {
      public void onMenuItemSelected(TreeItem item) {
        ContentWidget content = itemWidgets.get(item);
        if (content != null && !content.equals(app.getContent())) {
          History.newItem(getContentWidgetToken(content));
        }
      }
    });

    // Show the initial example
    String initToken = History.getToken();
    if (initToken.length() > 0) {
      historyListener.onHistoryChanged(initToken);
    } else {
      // Use the first token available
      TreeItem firstItem = app.getMainMenu().getItem(0).getChild(0);
      app.getMainMenu().setSelectedItem(firstItem, false);
      app.getMainMenu().ensureSelectedItemVisible();
      displayContentWidget(itemWidgets.get(firstItem));
    }
  }

  /**
   * Set the content to the {@link ContentWidget}.
   * 
   * @param content the {@link ContentWidget} to display
   */
  private void displayContentWidget(ContentWidget content) {
    if (content != null) {
      app.setContent(content);
      app.setContentTitle(content.getTabBar());
    }
  }

  /**
   * Get the token for a given content widget.
   * 
   * @return the content widget token.
   */
  private String getContentWidgetToken(ContentWidget content) {
    String className = content.getClass().getName();
    className = className.substring(className.lastIndexOf('.') + 1);
    return className;
  }

  /**
   * Get the style name of the reference element defined in the current GWT
   * theme style sheet.
   * 
   * @param prefix the prefix of the reference style name
   * @return the style name
   */
  private String getCurrentReferenceStyleName(String prefix) {
    String gwtRef = prefix + "-Reference-" + CUR_THEME;
    if (LocaleInfo.getCurrentLocale().isRTL()) {
      gwtRef += "-rtl";
    }
    return gwtRef;
  }

  /**
   * Create the main links at the top of the application.
   * 
   * @param constants the constants with text
   */
  private void setupMainLinks(ShowcaseConstants constants) {