simpleなtreeViewer - むしゃくしゃしてやった

package simpletree.views;

import java.util.ArrayList;

import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.part.*;
import org.eclipse.jface.viewers.*;
import org.eclipse.swt.graphics.Image;
import org.eclipse.jface.action.*;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.ui.*;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.SWT;
import org.eclipse.core.runtime.IAdaptable;


/**
 * This sample class demonstrates how to plug-in a new
 * workbench view. The view shows data obtained from the
 * model. The sample creates a dummy model on the fly,
 * but a real implementation would connect to the model
 * available either in this or another plug-in (e.g. the workspace).
 * The view is connected to the model using a content provider.
 * <p>
 * The view uses a label provider to define how model
 * objects should be presented in the view. Each
 * view can present the same model objects using
 * different labels and icons, if needed. Alternatively,
 * a single label provider can be shared between views
 * in order to ensure that objects of the same type are
 * presented in the same way everywhere.
 * <p>
 */

public class SampleView extends ViewPart {
	private TreeViewer viewer;
	private DrillDownAdapter drillDownAdapter;
	private Action action1;
	private Action action2;
	private Action doubleClickAction;

	/*
	 * The content provider class is responsible for
	 * providing objects to the view. It can wrap
	 * existing objects in adapters or simply return
	 * objects as-is. These objects may be sensitive
	 * to the current input of the view, or ignore
	 * it and always show the same content 
	 * (like Task List, for example).
	 */
	 
//	class TreeObject implements IAdaptable {
//		private String name;
//		private TreeParent parent;
//		
//		public TreeObject(String name) {
//			this.name = name;
//		}
//		public String getName() {
//			return name;
//		}
//		public void setParent(TreeParent parent) {
//			this.parent = parent;
//		}
//		public TreeParent getParent() {
//			return parent;
//		}
//		public String toString() {
//			return getName();
//		}
//		public Object getAdapter(Class key) {
//			return null;
//		}
//	}
//	
//	class TreeParent extends TreeObject {
//		private ArrayList children;
//		public TreeParent(String name) {
//			super(name);
//			children = new ArrayList();
//		}
//		public void addChild(TreeObject child) {
//			children.add(child);
//			child.setParent(this);
//		}
//		public void removeChild(TreeObject child) {
//			children.remove(child);
//			child.setParent(null);
//		}
//		public TreeObject [] getChildren() {
//			return (TreeObject [])children.toArray(new TreeObject[children.size()]);
//		}
//		public boolean hasChildren() {
//			return children.size()>0;
//		}
//	}

//	class ViewContentProvider implements IStructuredContentProvider, 
//										   ITreeContentProvider {
//		private TreeParent invisibleRoot;
//
//		public void inputChanged(Viewer v, Object oldInput, Object newInput) {
//		}
//		public void dispose() {
//		}
//		public Object[] getElements(Object parent) {
//			if (parent.equals(getViewSite())) {
//				if (invisibleRoot==null) initialize();
//				return getChildren(invisibleRoot);
//			}
//			return getChildren(parent);
//		}
//		public Object getParent(Object child) {
//			if (child instanceof TreeObject) {
//				return ((TreeObject)child).getParent();
//			}
//			return null;
//		}
//		public Object [] getChildren(Object parent) {
//			if (parent instanceof TreeParent) {
//				return ((TreeParent)parent).getChildren();
//			}
//			return new Object[0];
//		}
//		public boolean hasChildren(Object parent) {
//			if (parent instanceof TreeParent)
//				return ((TreeParent)parent).hasChildren();
//			return false;
//		}
/*
 * We will set up a dummy model to initialize tree heararchy.
 * In a real code, you will connect to a real model and
 * expose its hierarchy.
 */
//		private void initialize() {
//			TreeObject to1 = new TreeObject("Leaf 1");
//			TreeObject to2 = new TreeObject("Leaf 2");
//			TreeObject to3 = new TreeObject("Leaf 3");
//			TreeParent p1 = new TreeParent("Parent 1");
//			p1.addChild(to1);
//			p1.addChild(to2);
//			p1.addChild(to3);
//			
//			TreeObject to4 = new TreeObject("Leaf 4");
//			TreeParent p2 = new TreeParent("Parent 2");
//			p2.addChild(to4);
//			
//			TreeParent root = new TreeParent("Root");
//			root.addChild(p1);
//			root.addChild(p2);
//			
//			invisibleRoot = new TreeParent("");
//			invisibleRoot.addChild(root);
//		}
//	}
	class ViewLabelProvider extends LabelProvider {

		public String getText(Object obj) {
			if (obj instanceof TreeNode) {
				TreeNode node = (TreeNode) obj;
				return node.getValue().toString();
			}
			return obj.toString();
		}
		public Image getImage(Object obj) {
			String imageKey = ISharedImages.IMG_OBJ_ELEMENT;
//			if (obj instanceof TreeParent)
//			   imageKey = ISharedImages.IMG_OBJ_FOLDER;
			return PlatformUI.getWorkbench().getSharedImages().getImage(imageKey);
		}
	}
	class NameSorter extends ViewerSorter {
	}

	/**
	 * The constructor.
	 */
	public SampleView() {
	}

	/**
	 * This is a callback that will allow us
	 * to create the viewer and initialize it.
	 */
	public void createPartControl(Composite parent) {
		viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
		drillDownAdapter = new DrillDownAdapter(viewer);
		viewer.setContentProvider(new TreeNodeContentProvider());
		viewer.setLabelProvider(new ViewLabelProvider());
		viewer.setSorter(new NameSorter());
		viewer.setInput(makeData());

		// Create the help context id for the viewer's control
		PlatformUI.getWorkbench().getHelpSystem().setHelp(viewer.getControl(), "simpleTree.viewer");
//		makeActions();
//		hookContextMenu();
//		hookDoubleClickAction();
//		contributeToActionBars();
	}

	private Object makeData() {
		TreeNode[] parents = new TreeNode[10];
		for (int i = 0; i < parents.length; i++) {
			parents[i]=new TreeNode("p"+i);
			TreeNode[] children = new TreeNode[100];
			for (int j = 0; j < children.length; j++) {
				children[j]=new TreeNode("c"+j);
			}
			parents[i].setChildren(children);
		}
		return parents;
	}

//	private void hookContextMenu() {
//		MenuManager menuMgr = new MenuManager("#PopupMenu");
//		menuMgr.setRemoveAllWhenShown(true);
//		menuMgr.addMenuListener(new IMenuListener() {
//			public void menuAboutToShow(IMenuManager manager) {
//				SampleView.this.fillContextMenu(manager);
//			}
//		});
//		Menu menu = menuMgr.createContextMenu(viewer.getControl());
//		viewer.getControl().setMenu(menu);
//		getSite().registerContextMenu(menuMgr, viewer);
//	}
//
//	private void contributeToActionBars() {
//		IActionBars bars = getViewSite().getActionBars();
//		fillLocalPullDown(bars.getMenuManager());
//		fillLocalToolBar(bars.getToolBarManager());
//	}
//
//	private void fillLocalPullDown(IMenuManager manager) {
//		manager.add(action1);
//		manager.add(new Separator());
//		manager.add(action2);
//	}
//
//	private void fillContextMenu(IMenuManager manager) {
//		manager.add(action1);
//		manager.add(action2);
//		manager.add(new Separator());
//		drillDownAdapter.addNavigationActions(manager);
//		// Other plug-ins can contribute there actions here
//		manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
//	}
//	
//	private void fillLocalToolBar(IToolBarManager manager) {
//		manager.add(action1);
//		manager.add(action2);
//		manager.add(new Separator());
//		drillDownAdapter.addNavigationActions(manager);
//	}
//
//	private void makeActions() {
//		action1 = new Action() {
//			public void run() {
//				showMessage("Action 1 executed");
//			}
//		};
//		action1.setText("Action 1");
//		action1.setToolTipText("Action 1 tooltip");
//		action1.setImageDescriptor(PlatformUI.getWorkbench().getSharedImages().
//			getImageDescriptor(ISharedImages.IMG_OBJS_INFO_TSK));
//		
//		action2 = new Action() {
//			public void run() {
//				showMessage("Action 2 executed");
//			}
//		};
//		action2.setText("Action 2");
//		action2.setToolTipText("Action 2 tooltip");
//		action2.setImageDescriptor(PlatformUI.getWorkbench().getSharedImages().
//				getImageDescriptor(ISharedImages.IMG_OBJS_INFO_TSK));
//		doubleClickAction = new Action() {
//			public void run() {
//				ISelection selection = viewer.getSelection();
//				Object obj = ((IStructuredSelection)selection).getFirstElement();
//				showMessage("Double-click detected on "+obj.toString());
//			}
//		};
//	}
//
//	private void hookDoubleClickAction() {
//		viewer.addDoubleClickListener(new IDoubleClickListener() {
//			public void doubleClick(DoubleClickEvent event) {
//				doubleClickAction.run();
//			}
//		});
//	}
//	private void showMessage(String message) {
//		MessageDialog.openInformation(
//			viewer.getControl().getShell(),
//			"サンプル・ビュー",
//			message);
//	}

	/**
	 * Passing the focus request to the viewer's control.
	 */
	public void setFocus() {
		viewer.getControl().setFocus();
	}
}