Eclipse插件开发6——eclipse在线翻译插件Translator开发实例详解

在上一篇文章中讲到了一个简单的eclipse插件开发实例，主要是对插件工程的基本创建步骤进行了讲解，这篇文章当中给出一个翻译小插件的实例，调用有道翻译API实现实时取词查询。

一、项目中需要引用的库

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、窗体设计

先说明一下，API的key可以自行申请以获取链接。

下面先看主要代码，这里为QueryDialog.java，通过添加文本框、按钮等，最后响应事件：

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("翻译小助手");

		  shell.setLocation (x, y);

		  shell.setImage(Activator.getImageDescriptor("/icon/menu.png").createImage());

		  /*布局开始*/

		  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("请输入:");

		  queryText = new Text(headerComposite, SWT.BORDER | SWT.MULTI);

		  queryText.setText(DialogUtil.getSelecedTextFromEditor());//设置选中的文字

		  queryText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

		  queryButton = new Button(headerComposite, SWT.NONE);

		  queryButton.setText("查询");

		  //给Button添加事件

		  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("查询结果");

		  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", "请输入或选择查询");

				} else {

					Document doc = HttpClientUtil.getDocumentByQuery(qtext);

					if(doc != null){

						ResultModel rm = HttpClientUtil.convertDocToModel(doc);

						resultTextText.setText(ResultModel.getFormattedDisplatString(rm));

					}

				}

				super.mouseDown(e);

			}

		});

	}

}

把导出的jar包安装到plugins下，最终运行效果图：

项目源码已经commit在github上，有兴趣的可以去看一下：https://github.com/DianaCody/Translator.git，并且插件的jar包下载也在README.md文档里有下载链接，把jar包放到plugin目录下即可安装，jar包也可以到我的csdn资源页下载http://download.csdn.net/detail/dianacody/7659093