Eclipse资源管理（四）
eclipse资源监听
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1.资源监听必须实现IResourceChangeListener接口
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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);?
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添加资源监听：IWorkspace.addResourceChangeListener(Listener)
删除资源监听：IWorkspace.removeResourceChangeListener(Listener)
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2.创建资源的样本
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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);??
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3.一个简单的完整的资源监听实现类
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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); } }); } } }??