verbpopupmenu.java

SWT开发的Java调用COM的工具集

/*
 * Copyright (c) 2007 Software Wizards Pty Ltd, Victoria, Australia.
 * mailto:[e-mail]. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted. See the GNU General Public License
 * for more details.
 *
 * Redistribution of the SWTtoCOM software is not permitted as part of any
 * commercial product. Licensing terms for such distribution may be
 * obtained from the copyright holder.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
package au.com.swz.swttocom.example.win32explorer.views;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IMenuListener;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.Separator;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.ole.win32.Variant;
import org.eclipse.ui.IWorkbenchActionConstants;
import org.eclipse.ui.part.DrillDownAdapter;

import au.com.swz.swttocom.example.win32explorer.shell.FolderItem;
import au.com.swz.swttocom.example.win32explorer.shell.FolderItemVerb;
import au.com.swz.swttocom.example.win32explorer.shell.FolderItemVerbs;

public class VerbPopupMenu implements IMenuListener {
	private TreeViewer viewer;
	private DrillDownAdapter drillDownAdapter;
	
	VerbPopupMenu(TreeViewer viewer, DrillDownAdapter drillDownAdapter) {
		this.viewer = viewer;
		this.drillDownAdapter = drillDownAdapter;
	}

	public void menuAboutToShow(IMenuManager manager) {
		ISelection selection = viewer.getSelection();
		Object obj = ((IStructuredSelection)selection).getFirstElement();
		if (obj instanceof AbstractTreeObject) {
			FolderItem folderItem = ((AbstractTreeObject)obj).getFolderItem();
			FolderItemVerbs verbs = folderItem.verbs();
			if (verbs != null) {
				int verbCount = verbs.getCount();
				for (int i=0; i<verbCount; i++ ) {
					FolderItemVerb verb = verbs.item(new Variant(i));
					String verbName = verb.getName();
					if ((verbName == null) || (verbName.trim().length() <= 0)) {
						manager.add(new Separator());
					} else {
						manager.add(new VerbAction(verbName, verb));
					}
				}
				
			}
		}
		manager.add(new Separator());
		if (drillDownAdapter != null) {
			drillDownAdapter.addNavigationActions(manager);
		}
		// Other plug-ins can contribute there actions here
		manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
	}
	
	private static class VerbAction extends Action {
		private FolderItemVerb verb;
		
		VerbAction(String name, FolderItemVerb verb) {
			this.verb = verb;
			setText(name);
		}
		
		public void run() {
			verb.doIt();
		}
	}

}