playhandler.java

eclise rcp 项目,是非常好的学习源码

package com.siemens.ct.mp3m.ui.player.handlers;

import java.io.FileNotFoundException;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.handlers.HandlerUtil;

import com.siemens.ct.mp3m.model.physical.Mp3File;
import com.siemens.ct.mp3m.ui.player.Mp3Player;

/**
 * A handler to play mp3 files.
 * 
 * @see org.eclipse.core.commands.IHandler
 * @see org.eclipse.core.commands.AbstractHandler
 */
public class PlayHandler extends AbstractHandler {
	public Object execute(ExecutionEvent event) throws ExecutionException {
		StructuredSelection structuredSelection = (StructuredSelection) HandlerUtil
				.getCurrentSelection(event);

		if (structuredSelection.getFirstElement() instanceof Mp3File) {
			Mp3File file = (Mp3File) structuredSelection.getFirstElement();
			try {
				Mp3Player.getInstance().play(file.getFullPath());
			} catch (FileNotFoundException e) {
				e.printStackTrace();
			}
		}
		return null;
	}
}