Eclipse外掛開發6——eclipse線上翻譯外掛Translator開發例項詳解

        在上一篇文章中講到了一個簡單的eclipse外掛開發例項，主要是對外掛工程的基本建立步驟進行了講解，這篇文章當中給出一個翻譯小外掛的例項，呼叫有道翻譯API實現實時取詞查詢。

一、專案中需要引用的庫

httpclient-4.1.3.jar

httpclient-cache-4.1.3.jar

httpcore-4.1.4.jar

commons-io-2.1.jar

commons-logging-1.1.1.jar

httpmine-4.1.3.jar

org.jdom-1.1.1.jar

二、窗體設計

        先說明一下，API的key可以自行申請以獲取連結。

        下面先看主要程式碼，這裡為QueryDialog.java，通過新增文字框、按鈕等，最後響應事件：

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Monitor;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.jdom.Document;
import org.trans.fanyi.Activator;
import org. trans.fanyi.httpclient.HttpClientUtil;
import org. trans.fanyi.model.ResultModel;

public class QueryDialog extends Dialog{
	
	private Text queryText;
	private Text resultTextText;
	private Button queryButton;
	
    private Group infoGroup;

	protected QueryDialog(Shell parentShell) {
		super(parentShell);
	}

	@Override
	protected Control createContents(Composite parent) {
		  Shell shell = this.getShell(); 
		  shell.setSize(400, 300);
		  Monitor primary = shell.getMonitor(); 
		  Rectangle bounds = primary.getBounds(); 
		  Rectangle rect = shell.getBounds(); 
		  int x = bounds.x + (bounds.width - rect.width) / 2; 
		  int y = bounds.y + (bounds.height - rect.height) / 2 - 50;
		  shell.setText("翻譯小助手");
		  shell.setLocation (x, y);
		  shell.setImage(Activator.getImageDescriptor("/icon/menu.png").createImage());
		  /*佈局開始*/
		  Composite composite = new Composite(parent, SWT.NONE);
		  GridLayout layout = new GridLayout(3, false);
		  layout.marginBottom = 10;
		  layout.marginTop = 10;
		  layout.marginLeft = 10;
		  layout.marginRight = -30;
		  layout.horizontalSpacing = 30;
		  layout.verticalSpacing = 0;
		  composite.setLayout(layout);
		  composite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		  /*headerComposite...*/
		  Composite headerComposite = new Composite(composite, SWT.NONE);
		  headerComposite.setLayout(new GridLayout(3, false));
		  headerComposite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		  new Label(headerComposite, SWT.NONE).setText("請輸入:");
		  queryText = new Text(headerComposite, SWT.BORDER | SWT.MULTI);
		  queryText.setText(DialogUtil.getSelecedTextFromEditor());//設定選中的文字
		  queryText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		  queryButton = new Button(headerComposite, SWT.NONE);
		  queryButton.setText("查詢");
		  //給Button新增事件
		  addListenerToButton();
		  //******************************//
		  //***GROUP START***//
		  Composite infoComposite = new Composite(parent, SWT.NONE);
		  infoComposite.setLayout(new GridLayout(1, true));
		  infoComposite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		  infoGroup = new Group(infoComposite, SWT.NONE);
		  infoGroup.setText("查詢結果");
		  GridLayout groupLayout = new GridLayout(1, false);
		  groupLayout.marginBottom = 5;
		  groupLayout.marginTop = 5;
		  groupLayout.marginLeft = 10;
		  groupLayout.marginRight = 10;
		  infoGroup.setLayout(groupLayout);
		  infoGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		  infoGroup.pack();
		  resultTextText = new Text(infoGroup, SWT.MULTI | SWT.BORDER | SWT.WRAP | SWT.V_SCROLL | SWT.READ_ONLY);
		  resultTextText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		  resultTextText.setText("" + System.getProperty("line.separator") + 
		  		""+ System.getProperty("line.separator") + 
		  		""+ System.getProperty("line.separator") + 
		  		""+ System.getProperty("line.separator") + 
		  		""+ System.getProperty("line.separator") + 
		  		""+ System.getProperty("line.separator") + 
		  		""+ System.getProperty("line.separator") + 
		  		""+ System.getProperty("line.separator") + 
//		  		""+ System.getProperty("line.separator") + 
		  		"");
		  return super.createContents(parent);
	}

	@Override
	protected Button createButton(Composite parent, int id,
	        String label, boolean defaultButton) {
	    if (id == IDialogConstants.CANCEL_ID || id == IDialogConstants.OK_ID) {
	    	return null;
	    }
	    return super.createButton(parent, id, label, defaultButton);
	}
	
	public void addListenerToButton(){
		queryButton.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseDown(MouseEvent e) {
				String qtext = queryText.getText();
				if(qtext.isEmpty()){
					MessageDialog.openInformation(Display.getCurrent().getActiveShell(), "提示", "請輸入或選擇查詢");
				} else {
					Document doc = HttpClientUtil.getDocumentByQuery(qtext);
					if(doc != null){
						ResultModel rm = HttpClientUtil.convertDocToModel(doc);
						resultTextText.setText(ResultModel.getFormattedDisplatString(rm));
					}
				}
				super.mouseDown(e);
			}
		});
	}
}
 

       把匯出的jar包安裝到plugins下，最終執行效果圖：