Eclipse RCP 资源管理（自定义Project）四 （转）

eclipse资源监听

1.资源监听必须实现IResourceChangeListener接口

IWorkspace workspace = ResourcesPlugin.getWorkspace();
   IResourceChangeListener listener = new IResourceChangeListener() {
      public void resourceChanged(IResourceChangeEvent event) {
         System.out.println("Something changed!");
      }
   };
   workspace.addResourceChangeListener(listener);

   //... some time later one ...
   workspace.removeResourceChangeListener(listener);

添加资源监听：IWorkspace.addResourceChangeListener(Listener)

删除资源监听：IWorkspace.removeResourceChangeListener(Listener)

2.创建资源的样本

IWorkspace workspace = ResourcesPlugin.getWorkspace();
   final IProject project = workspace.getRoot().getProject("My Project");
   IWorkspaceRunnable operation = new IWorkspaceRunnable() {
      public void run(IProgressMonitor monitor) throws CoreException {
         int fileCount = 10;
         project.create(null);
         project.open(null);
         for (int i = 0; i < fileCount; i++) {
            IFile file = project.getFile("File" + i);
            file.create(null, IResource.NONE, null);
         }
      }
   };
   workspace.run(operation, null);

3.一个简单的完整的资源监听实现类

public class DocIndexUpdater implements IResourceChangeListener {
      private TableViewer table; //assume this gets initialized somewhere
      private static final IPath DOC_PATH = new Path("MyProject/doc");
      public void resourceChanged(IResourceChangeEvent event) {
         //we are only interested in POST_CHANGE events
         if (event.getType() != IResourceChangeEvent.POST_CHANGE)
            return;
         IResourceDelta rootDelta = event.getDelta();
         //get the delta, if any, for the documentation directory
         IResourceDelta docDelta = rootDelta.findMember(DOC_PATH);
         if (docDelta == null)
            return;
         final ArrayList changed = new ArrayList();
         IResourceDeltaVisitor visitor = new IResourceDeltaVisitor() {
            public boolean visit(IResourceDelta delta) {
               //only interested in changed resources (not added or removed)
               if (delta.getKind() != IResourceDelta.CHANGED)
                  return true;
               //only interested in content changes
               if ((delta.getFlags() & IResourceDelta.CONTENT) == 0)
                  return true;
               IResource resource = delta.getResource();
               //only interested in files with the "txt" extension
               if (resource.getType() == IResource.FILE &&
    "txt".equalsIgnoreCase(resource.getFileExtension())) {
                  changed.add(resource);
               }
               return true;
            }
         };
         try {
            docDelta.accept(visitor);
         } catch (CoreException e) {
            //open error dialog with syncExec or print to plugin log file
         }
         //nothing more to do if there were no changed text files
         if (changed.size() == 0)
            return;
         //post this update to the table
         Display display = table.getControl().getDisplay();
         if (!display.isDisposed()) {
            display.asyncExec(new Runnable() {
               public void run() {
                  //make sure the table still exists
                  if (table.getControl().isDisposed())
                     return;
                  table.update(changed.toArray(), null);
               }
            });
         }
      }
   }