CustomComponentsDemo.java

/*
 * CustomComponentsDemo.java
 *
 * Copyright � 1998-2011 Research In Motion Limited
 * 
 * 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.
 *
 * Note: For the sake of simplicity, this sample application may not leverage
 * resource bundles and resource strings.  However, it is STRONGLY recommended
 * that application developers make use of the localization features available
 * within the BlackBerry development platform to ensure a seamless application
 * experience across a variety of languages and geographies.  For more information
 * on localizing your application, please refer to the BlackBerry Java Development
 * Environment Development Guide associated with this release.
 */

package com.rim.samples.device.accessibilitydemo.customcomponentsdemo;

import net.rim.device.api.system.Bitmap;
import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.accessibility.AccessibilityManager;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.SeparatorField;
import net.rim.device.api.ui.container.MainScreen;

import com.rim.samples.device.accessibilitydemo.screenreaderdemo.ScreenReader;

/**
 * The Accessibility Demo consists of two projects, CustomComponentsDemo and
 * ScreenReaderDemo. CustomComponentsDemo is a UI application featuring
 * customized accessible UI fields. ScreenReaderDemo is a library project
 * containing the ScreenReader class, which is a listener for accessible events,
 * and utility classes for handling the accessible events generated by the
 * accessible fields in the CustomComponentsDemo.
 */
public final class CustomComponentsDemo extends UiApplication {
    private static ScreenReader _screenReader;

    /**
     * Entry point for application.
     * 
     * @param args
     *            Command line arguments (not used)
     */
    public static void main(final String[] args) {
        // Create a new instance of the application and make the currently
        // running thread the application's event dispatch thread.
        new CustomComponentsDemo().enterEventDispatcher();
    }

    /**
     * Creates a new CustomComponentsDemo object
     */
    public CustomComponentsDemo() {
        try {
            // Only one listener can be registered
            if (!AccessibilityManager.isAccessibleEventListenerRegistered()) {
                _screenReader = new ScreenReader();
                AccessibilityManager.setAccessibleEventListener(_screenReader);
            } else {
                System.out
                        .println("An AccessibleEventListener is already registered");
            }
        } catch (final net.rim.device.api.system.UnsupportedOperationException uoe) {
            UiApplication.getUiApplication().invokeLater(new Runnable() {
                public void run() {
                    Dialog.alert("Accessibilty not supported on this device");
                }
            });
        }

        // Push the UI screen onto the display stack
        pushScreen(new CustomComponentsDemoScreen());
    }

    /**
     * The UI screen for the CustomComponentsDemo
     */
    private static final class CustomComponentsDemoScreen extends MainScreen {
        private final IconToolbarComponent _iconToolbar;
        private final TableComponent _tableComponent;
        private final TextComponent _textComponent;
        private final ValueComponent _valueComponent;

        /**
         * Creates a new CustomComponentsDemoScreen object
         */
        private CustomComponentsDemoScreen() {
            setTitle("Accessibility Demo");

            // Initialize the IconToolbarComponent
            _iconToolbar = new IconToolbarComponent();
            final Bitmap bitmap1 = Bitmap.getBitmapResource("1.png");
            final Bitmap bitmap2 = Bitmap.getBitmapResource("2.png");
            final Bitmap bitmap3 = Bitmap.getBitmapResource("3.png");
            final Bitmap bitmap4 = Bitmap.getBitmapResource("4.png");
            _iconToolbar.addIcon(bitmap1, " Maps ");
            _iconToolbar.addIcon(bitmap2, " Media ");
            _iconToolbar.addIcon(bitmap3, " Documents ");
            _iconToolbar.addIcon(bitmap4, " Applications ");

            // Add the IconToolbarComponent to the screen
            add(_iconToolbar);

            add(new SeparatorField());

            // Create TableComponent and add to the screen
            _tableComponent = new TableComponent(3, 4);
            add(_tableComponent);

            add(new SeparatorField());

            // Create ValueComponent and add to the screen
            _valueComponent = new ValueComponent(0, 50, 100);
            add(_valueComponent);

            add(new SeparatorField());

            // Create TextComponent and add to the screen
            _textComponent =
                    new TextComponent(
                            "Connect to everything you love in life through the power of a BlackBerry� smartphone");
            add(_textComponent);
        }

        /**
         * @see Screen#close()
         */
        public void close() {
            // Unregister the accessible event listener when exiting the app
            if (AccessibilityManager.isAccessibleEventListenerRegistered()) {
                AccessibilityManager
                        .removeAccessibleEventListener(_screenReader);
            }

            super.close();
        }
    }
}