chatview.java

mywork是rcp开发的很好的例子

package net.sf.p2pim;

import java.text.SimpleDateFormat;

import net.jxta.myjxta.MyJXTA;
import net.jxta.myjxta.ViewFactory;
import net.jxta.myjxta.dialog.Dialog;
import net.jxta.myjxta.dialog.DialogListener;
import net.jxta.myjxta.dialog.DialogMessage;
import net.jxta.myjxta.plugin.PluginView;
import net.jxta.pipe.PipeService;
import net.sf.component.config.ConfigHelper;
import net.sf.component.simplenote.SimpleNote;
import net.sf.util.StringUtil;

import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.part.ViewPart;

public class ChatView extends ViewPart implements DialogListener,PluginView{

	public static final String ID = "MyWork_p2pim.view";
	private ImageDescriptor img_unread;
	private ImageDescriptor img_default;
	private SimpleNote note; //对话信息
	private ChatNote chat; //对话录入框
	private Dialog dialog; //myjxta的对话机制
	
	public void createPartControl(Composite parent) {
		img_unread=P2PActivator.getImageDescriptor("icons/unread.gif");
		img_default=P2PActivator.getImageDescriptor("icons/messages.gif");

		Composite top = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		layout.verticalSpacing=0;
		top.setLayout(layout);
	
		note = new SimpleNote(top,SWT.READ_ONLY|SWT.WRAP | SWT.V_SCROLL);
		note.setBasePath(ConfigHelper.getDataHome());
		GridDataFactory.fillDefaults().grab(true, true).applyTo(note);
		chat=new ChatNote(top,SWT.NULL);
		GridDataFactory.fillDefaults().hint(100, 120).grab(true, false).applyTo(chat);
		chat.addSendListender(new SelectionAdapter(){
			public void widgetSelected(SelectionEvent e) {
				if(StringUtil.isNotNull(chat.getSimpleNote().getText())){
					dialog.dispatch(chat.getSimpleNote().getText());
					chat.getSimpleNote().setText("");
				}
			}
		});
	}

	public void setFocus() {
		this.setTitleImage(img_default.createImage(this.getViewSite().getShell().getDisplay()));
	}

	public void receive(final DialogMessage msg) {
		Display.getDefault().asyncExec(new Runnable(){
			public void run() {
		        if( !StringUtil.isNull(msg.getHtmlMessage())) {
		        	note.appendHtml(convertMessage(msg));
		        }
		        if (!dialog.getPipeAdvertisement().getType().equals(PipeService.PropagateType)) {
		            //1:1 chat goodbye
		            if (Dialog.GOODBYE_CMD.equals(msg.getCommand())) {
		            	chat.setChatEnabled(false);
		            }
		        }
		        //如果不是当前对话，则进行提醒
				if(ChatView.this != ChatView.this.getViewSite().getWorkbenchWindow().getActivePage().getActivePart()){
					ChatView.this.setTitleImage(img_unread.createImage(ChatView.this.getViewSite().getShell().getDisplay()));
				}
			}
		});
        ViewFactory.getView(MyJXTA.getTheInstance()).updatePluginPanel(this, msg.getLabel());
	}

	private String convertMessage(final DialogMessage msg) {
		StringBuffer sb=new StringBuffer();
		sb.append("[");
		sb.append(msg.getOriginator());
		sb.append("@");
		sb.append(new SimpleDateFormat("HH:mm:ss").format(msg.getTimeStamp()));
		sb.append("]");
		//20071123 部分兼容myjxta的消息，对myjxta，只取plaintext
		String htmlMessage = msg.getHtmlMessage();
		if(htmlMessage.indexOf("<html") != -1)
			htmlMessage=msg.getPlainTextMessage();
		sb.append(htmlMessage);  //TODO:myjxta传递过来的中文
		sb.append("\n");
		return sb.toString();
	}

	public Dialog getDialog() {
		return dialog;
	}

	public void setDialog(Dialog dialog) {
		this.dialog = dialog;
	}

	@Override
	public void setPartName(String partName) {
		super.setPartName(partName);
	}

	public void dismiss() {
		dialog.close();
	}

	@Override
	public void dispose() {
		this.dismiss();
		JFaceResources.getResources().destroyImage(img_unread);
		JFaceResources.getResources().destroyImage(img_default);
		super.dispose();
	}
	
}