com.google.gwt.sample.showcase.client.content.lists.CwMenuBar.java Source code

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Here is the source code for com.google.gwt.sample.showcase.client.content.lists.CwMenuBar.java

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/*
 * 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.content.lists;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.RunAsyncCallback;
import com.google.gwt.i18n.client.Constants;
import com.google.gwt.sample.showcase.client.ContentWidget;
import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseData;
import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseSource;
import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseStyle;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.MenuBar;
import com.google.gwt.user.client.ui.MenuItem;
import com.google.gwt.user.client.ui.Widget;

/**
 * Example file.
 */
@ShowcaseStyle({ ".gwt-MenuBar", ".gwt-MenuBarPopup", "html>body .gwt-MenuBarPopup", "* html .gwt-MenuBarPopup" })
public class CwMenuBar extends ContentWidget {
    /**
     * The constants used in this Content Widget.
     */
    @ShowcaseSource
    public static interface CwConstants extends Constants {
        String cwMenuBarDescription();

        String cwMenuBarEditCategory();

        String[] cwMenuBarEditOptions();

        String cwMenuBarFileCategory();

        String[] cwMenuBarFileOptions();

        String[] cwMenuBarFileRecents();

        String[] cwMenuBarGWTOptions();

        String cwMenuBarHelpCategory();

        String[] cwMenuBarHelpOptions();

        String cwMenuBarName();

        String[] cwMenuBarPrompts();
    }

    /**
     * An instance of the constants.
     */
    @ShowcaseData
    private final CwConstants constants;

    /**
     * Constructor.
     *
     * @param constants the constants
     */
    public CwMenuBar(CwConstants constants) {
        super(constants.cwMenuBarName(), constants.cwMenuBarDescription(), true);
        this.constants = constants;
    }

    /**
     * Initialize this example.
     */
    @ShowcaseSource
    @Override
    public Widget onInitialize() {
        // Create a command that will execute on menu item selection
        Command menuCommand = new Command() {
            private int curPhrase = 0;
            private final String[] phrases = constants.cwMenuBarPrompts();

            public void execute() {
                Window.alert(phrases[curPhrase]);
                curPhrase = (curPhrase + 1) % phrases.length;
            }
        };

        // Create a menu bar
        MenuBar menu = new MenuBar();
        menu.setAutoOpen(true);
        menu.setWidth("500px");
        menu.setAnimationEnabled(true);

        // Create a sub menu of recent documents
        MenuBar recentDocsMenu = new MenuBar(true);
        String[] recentDocs = constants.cwMenuBarFileRecents();
        for (int i = 0; i < recentDocs.length; i++) {
            recentDocsMenu.addItem(recentDocs[i], menuCommand);
        }

        // Create the file menu
        MenuBar fileMenu = new MenuBar(true);
        fileMenu.setAnimationEnabled(true);
        menu.addItem(new MenuItem(constants.cwMenuBarFileCategory(), fileMenu));
        String[] fileOptions = constants.cwMenuBarFileOptions();
        for (int i = 0; i < fileOptions.length; i++) {
            if (i == 3) {
                fileMenu.addSeparator();
                fileMenu.addItem(fileOptions[i], recentDocsMenu);
                fileMenu.addSeparator();
            } else {
                fileMenu.addItem(fileOptions[i], menuCommand);
            }
        }

        // Create the edit menu
        MenuBar editMenu = new MenuBar(true);
        menu.addItem(new MenuItem(constants.cwMenuBarEditCategory(), editMenu));
        String[] editOptions = constants.cwMenuBarEditOptions();
        for (int i = 0; i < editOptions.length; i++) {
            editMenu.addItem(editOptions[i], menuCommand);
        }

        // Create the GWT menu
        MenuBar gwtMenu = new MenuBar(true);
        menu.addItem(new MenuItem("GWT", true, gwtMenu));
        String[] gwtOptions = constants.cwMenuBarGWTOptions();
        for (int i = 0; i < gwtOptions.length; i++) {
            gwtMenu.addItem(gwtOptions[i], menuCommand);
        }

        // Create the help menu
        MenuBar helpMenu = new MenuBar(true);
        menu.addSeparator();
        menu.addItem(new MenuItem(constants.cwMenuBarHelpCategory(), helpMenu));
        String[] helpOptions = constants.cwMenuBarHelpOptions();
        for (int i = 0; i < helpOptions.length; i++) {
            helpMenu.addItem(helpOptions[i], menuCommand);
        }

        // Return the menu
        menu.ensureDebugId("cwMenuBar");
        return menu;
    }

    @Override
    protected void asyncOnInitialize(final AsyncCallback<Widget> callback) {
        GWT.runAsync(CwMenuBar.class, new RunAsyncCallback() {

            public void onFailure(Throwable caught) {
                callback.onFailure(caught);
            }

            public void onSuccess() {
                callback.onSuccess(onInitialize());
            }
        });
    }
}