removemusicfolderaction.java

eclise rcp 项目,是非常好的学习源码

/*******************************************************************************
 * Copyright (c) 2007 Siemens AG
 * 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Kai T鰀ter - initial API and implementation
 *******************************************************************************/

package com.siemens.ct.mp3m.actions;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowActionDelegate;

import com.siemens.ct.mp3m.ModelInitializer;
import com.siemens.ct.mp3m.model.physical.Mp3Directory;
import com.siemens.ct.mp3m.model.physical.MusicFolders;

public class RemoveMusicFolderAction implements IWorkbenchWindowActionDelegate {

	private String selectedDirectory;

	public void run(IAction action) {
		MusicFolders.removeMusicFolder(selectedDirectory);
		ModelInitializer.createTree();
	}

	public void dispose() {
		// TODO Auto-generated method stub
	}

	public void init(IWorkbenchWindow window) {
	}

	public void selectionChanged(IAction action, ISelection selection) {
		if (!selection.isEmpty()) {
			StructuredSelection structuredSelection = (StructuredSelection) selection;
			if (structuredSelection.getFirstElement() instanceof Mp3Directory) {
				String folder = ((Mp3Directory) structuredSelection.getFirstElement()).getName();
				if (MusicFolders.contains(folder)) {
					action.setEnabled(true);
					selectedDirectory = folder;
					return;
				} else {
					action.setEnabled(false);
				}
			}
		}
		action.setEnabled(false);
	}
}