com.google.gwt.language.sample.hellolanguage.client.LanguageDetectionDemo.java Source code

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Here is the source code for com.google.gwt.language.sample.hellolanguage.client.LanguageDetectionDemo.java

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/*
 * Copyright 2009 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.language.sample.hellolanguage.client;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.language.client.translation.BrandingOptions;
import com.google.gwt.language.client.translation.LangDetCallback;
import com.google.gwt.language.client.translation.LangDetResult;
import com.google.gwt.language.client.translation.Translation;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.TextArea;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * Demo for language detection API.
 */
public class LanguageDetectionDemo extends Composite {

    private final TextArea inputTextArea = new TextArea();
    private final Label outputDiv = new Label();

    public LanguageDetectionDemo() {
        inputTextArea.setStyleName(Styles.DEMO_TEXTAREA_STYLE);
        outputDiv.setStyleName(Styles.LANG_DET_OUTPUT_DIV_STYLE);

        VerticalPanel demoPanel = createDemoPanel();

        VerticalPanel wrapperPanel = new VerticalPanel();
        wrapperPanel.setWidth("100%");
        wrapperPanel.add(demoPanel);
        wrapperPanel.setCellHorizontalAlignment(demoPanel, HasHorizontalAlignment.ALIGN_CENTER);

        Widget branding = Translation
                .createBrandingWidget(BrandingOptions.newInstance(BrandingOptions.Type.VERTICAL));
        wrapperPanel.add(branding);
        wrapperPanel.setCellHorizontalAlignment(branding, HasHorizontalAlignment.ALIGN_RIGHT);

        initWidget(wrapperPanel);
    }

    /**
     * Creates a demo panel.
     *
     * @return demo panel
     */
    private VerticalPanel createDemoPanel() {
        VerticalPanel demoPanel = new VerticalPanel();
        demoPanel.add(new Label("Enter text:"));
        demoPanel.add(inputTextArea);

        HorizontalPanel hPanel = new HorizontalPanel();
        hPanel.setSpacing(10);
        hPanel.add(createLanguageDetectionButton());
        hPanel.add(new Label(">>"));
        hPanel.add(outputDiv);
        demoPanel.add(hPanel);

        return demoPanel;
    }

    /**
     * Creates a "Detect" button to do language detection.
     *
     * @return button
     */
    private Button createLanguageDetectionButton() {
        Button langDetButton = new Button("Detect");
        langDetButton.addClickHandler(new ClickHandler() {
            public void onClick(ClickEvent event) {
                Translation.detect(inputTextArea.getText(), new LangDetCallback() {
                    @Override
                    protected void onCallback(LangDetResult result) {
                        outputDiv.setText("Detected language: " + result.getLanguage() + ", Confidence: "
                                + result.confidence());
                    }
                });
            }
        });
        return langDetButton;
    }
}