sampletreeviewermovingboxview.java

用java 实现的IE browser适合于学者

package com.hnjchina.example;

import java.util.Iterator;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IMenuListener;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.part.ViewPart;

import com.hnjchina.example.treeviewer.BoardGame;
import com.hnjchina.example.treeviewer.Book;
import com.hnjchina.example.treeviewer.Model;
import com.hnjchina.example.treeviewer.MovingBox;
import com.hnjchina.example.treeviewer.ui.BoardgameFilter;
import com.hnjchina.example.treeviewer.ui.BookBoxBoardSorter;
import com.hnjchina.example.treeviewer.ui.MovingBoxContentProvider;
import com.hnjchina.example.treeviewer.ui.MovingBoxLabelProvider;
import com.hnjchina.example.treeviewer.ui.NoArticleSorter;
import com.hnjchina.example.treeviewer.ui.ThreeItemFilter;


/**
 * Insert the type's description here.
 * @see ViewPart
 */
public class SampleTreeViewerMovingBoxView extends ViewPart {
	protected TreeViewer treeViewer;
	protected Text text;
	protected MovingBoxLabelProvider labelProvider;
	
	protected Action onlyBoardGamesAction, atLeatThreeItems;
	protected Action booksBoxesGamesAction, noArticleAction;
	protected Action addBookAction, removeAction;
	protected ViewerFilter onlyBoardGamesFilter, atLeastThreeFilter;
	protected ViewerSorter booksBoxesGamesSorter, noArticleSorter;
	
	protected MovingBox root;
	
	/**
	 * The constructor.
	 */
	public SampleTreeViewerMovingBoxView() {
	}

	/*
	 * @see IWorkbenchPart#createPartControl(Composite)
	 */
	public void createPartControl(Composite parent) {
		/* Create a grid layout object so the text and treeviewer
		 * are layed out the way I want. */
		GridLayout layout = new GridLayout();
		layout.numColumns = 1;
		layout.verticalSpacing = 2;
		layout.marginWidth = 0;
		layout.marginHeight = 2;
		parent.setLayout(layout);
		
		/* Create a "label" to display information in. I'm
		 * using a text field instead of a lable so you can
		 * copy-paste out of it. */
		text = new Text(parent, SWT.READ_ONLY | SWT.SINGLE | SWT.BORDER);
		// layout the text field above the treeviewer
		GridData layoutData = new GridData();
		layoutData.grabExcessHorizontalSpace = true;
		layoutData.horizontalAlignment = GridData.FILL;
		text.setLayoutData(layoutData);
		
		// Create the tree viewer as a child of the composite parent
		treeViewer = new TreeViewer(parent);
		treeViewer.setContentProvider(new MovingBoxContentProvider());
		labelProvider = new MovingBoxLabelProvider();
		treeViewer.setLabelProvider(labelProvider);
		
		treeViewer.setUseHashlookup(true);
		
		// layout the tree viewer below the text field
		layoutData = new GridData();
		layoutData.grabExcessHorizontalSpace = true;
		layoutData.grabExcessVerticalSpace = true;
		layoutData.horizontalAlignment = GridData.FILL;
		layoutData.verticalAlignment = GridData.FILL;
		treeViewer.getControl().setLayoutData(layoutData);
		
		// Create menu, toolbars, filters, sorters.
		createFiltersAndSorters();
		createActions();
		createMenus();
		createToolbar();
		hookListeners();
		
		treeViewer.setInput(getInitalInput());
		treeViewer.expandAll();
	}
	
	protected void createFiltersAndSorters() {
		atLeastThreeFilter = new ThreeItemFilter();
		onlyBoardGamesFilter = new BoardgameFilter();
		booksBoxesGamesSorter = new BookBoxBoardSorter();
		noArticleSorter = new NoArticleSorter();
	}

	protected void hookListeners() {
		treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {
			public void selectionChanged(SelectionChangedEvent event) {
				// if the selection is empty clear the label
				if(event.getSelection().isEmpty()) {
					text.setText("");
					return;
				}
				if(event.getSelection() instanceof IStructuredSelection) {
					IStructuredSelection selection = (IStructuredSelection)event.getSelection();
					StringBuffer toShow = new StringBuffer();
					for (Iterator iterator = selection.iterator(); iterator.hasNext();) {
						Object domain = (Model) iterator.next();
						String value = labelProvider.getText(domain);
						toShow.append(value);
						toShow.append(", ");
					}
					// remove the trailing comma space pair
					if(toShow.length() > 0) {
						toShow.setLength(toShow.length() - 2);
					}
					text.setText(toShow.toString());
				}
			}
		});
	}
	
	protected void createActions() {
		onlyBoardGamesAction = new Action("Only Board Games") {
			public void run() {
				updateFilter(onlyBoardGamesAction);
			}
		};
		onlyBoardGamesAction.setChecked(false);
		
		atLeatThreeItems = new Action("Boxes With At Least Three Items") {
			public void run() {
				updateFilter(atLeatThreeItems);
			}
		};
		atLeatThreeItems.setChecked(false);
		
		booksBoxesGamesAction = new Action("Books, Boxes, Games") {
			public void run() {
				updateSorter(booksBoxesGamesAction);
			}
		};
		booksBoxesGamesAction.setChecked(false);
		
		noArticleAction = new Action("Ignoring Articles") {
			public void run() {
				updateSorter(noArticleAction);
			}
		};
		noArticleAction.setChecked(false);
		
		addBookAction = new Action("Add Book") {
			public void run() {
				addNewBook();
			}			
		};
		addBookAction.setToolTipText("Add a New Book");
//		addBookAction.setImageDescriptor(TreeViewerPlugin.getImageDescriptor("newBook.gif"));

		removeAction = new Action("Delete") {
			public void run() {
				removeSelected();
			}			
		};
		removeAction.setToolTipText("Delete");
//		removeAction.setImageDescriptor(TreeViewerPlugin.getImageDescriptor("remove.gif"));		
	}
	
	/** Add a new book to the selected moving box.
	 * If a moving box is not selected, use the selected
	 * obect's moving box. 
	 * 
	 * If nothing is selected add to the root. */
	protected void addNewBook() {
		MovingBox receivingBox;
		if (treeViewer.getSelection().isEmpty()) {
			receivingBox = root;
		} else {
			IStructuredSelection selection = (IStructuredSelection) treeViewer.getSelection();
			Model selectedDomainObject = (Model) selection.getFirstElement();
			if (!(selectedDomainObject instanceof MovingBox)) {
				receivingBox = selectedDomainObject.getParent();
			} else {
				receivingBox = (MovingBox) selectedDomainObject;
			}
		}
		receivingBox.add(Book.newBook());
	}

	/** Remove the selected domain object(s).
	 * If multiple objects are selected remove all of them.
	 * 
	 * If nothing is selected do nothing. */
	protected void removeSelected() {
		if (treeViewer.getSelection().isEmpty()) {
			return;
		}
		IStructuredSelection selection = (IStructuredSelection) treeViewer.getSelection();
		/* Tell the tree to not redraw until we finish
		 * removing all the selected children. */
		treeViewer.getTree().setRedraw(false);
		for (Iterator iterator = selection.iterator(); iterator.hasNext();) {
			Model model = (Model) iterator.next();
			MovingBox parent = model.getParent();
			parent.remove(model);
		}
		treeViewer.getTree().setRedraw(true);
	}
	
	protected void createMenus() {
		IMenuManager rootMenuManager = getViewSite().getActionBars().getMenuManager();
		rootMenuManager.setRemoveAllWhenShown(true);
		rootMenuManager.addMenuListener(new IMenuListener() {
			public void menuAboutToShow(IMenuManager mgr) {
				fillMenu(mgr);
			}
		});
		fillMenu(rootMenuManager);
	}


	protected void fillMenu(IMenuManager rootMenuManager) {
		IMenuManager filterSubmenu = new MenuManager("Filters");
		rootMenuManager.add(filterSubmenu);
		filterSubmenu.add(onlyBoardGamesAction);
		filterSubmenu.add(atLeatThreeItems);
		
		IMenuManager sortSubmenu = new MenuManager("Sort By");
		rootMenuManager.add(sortSubmenu);
		sortSubmenu.add(booksBoxesGamesAction);
		sortSubmenu.add(noArticleAction);
	}
	
	
	
	protected void updateSorter(Action action) {
		if(action == booksBoxesGamesAction) {
			noArticleAction.setChecked(!booksBoxesGamesAction.isChecked());
			if(action.isChecked()) {
				treeViewer.setSorter(booksBoxesGamesSorter);
			} else {
				treeViewer.setSorter(null);
			}
		} else if(action == noArticleAction) {
			booksBoxesGamesAction.setChecked(!noArticleAction.isChecked());
			if(action.isChecked()) {
				treeViewer.setSorter(noArticleSorter);
			} else {
				treeViewer.setSorter(null);
			}
		}
			
	}
	
	/* Multiple filters can be enabled at a time. */
	protected void updateFilter(Action action) {
		if(action == atLeatThreeItems) {
			if(action.isChecked()) {
				treeViewer.addFilter(atLeastThreeFilter);
			} else {
				treeViewer.removeFilter(atLeastThreeFilter);
			}
		} else if(action == onlyBoardGamesAction) {
			if(action.isChecked()) {
				treeViewer.addFilter(onlyBoardGamesFilter);
			} else {
				treeViewer.removeFilter(onlyBoardGamesFilter);
			}
		}
	}
	
	protected void createToolbar() {
		IToolBarManager toolbarManager = getViewSite().getActionBars().getToolBarManager();
		toolbarManager.add(addBookAction);
		toolbarManager.add(removeAction);
	}
	
	
	public MovingBox getInitalInput() {
		root = new MovingBox();
		MovingBox someBooks = new MovingBox("Books");
		MovingBox games = new MovingBox("Games");
		MovingBox books = new MovingBox("More books");
		MovingBox games2 = new MovingBox("More games");
		
		root.add(someBooks);
		root.add(games);
		root.add(new MovingBox());
		
		someBooks.add(books);
		games.add(games2);
		
		books.add(new Book("The Lord of the Rings", "J.R.R.", "Tolkien"));
		books.add(new BoardGame("Taj Mahal", "Reiner", "Knizia"));
		books.add(new Book("Cryptonomicon", "Neal", "Stephenson"));
		books.add(new Book("Smalltalk, Objects, and Design", "Chamond", "Liu"));
		books.add(new Book("A Game of Thrones", "George R. R.", " Martin"));
		books.add(new Book("The Hacker Ethic", "Pekka", "Himanen"));
		//books.add(new MovingBox());
		
		books.add(new Book("The Code Book", "Simon", "Singh"));
		books.add(new Book("The Chronicles of Narnia", "C. S.", "Lewis"));
		books.add(new Book("The Screwtape Letters", "C. S.", "Lewis"));
		books.add(new Book("Mere Christianity ", "C. S.", "Lewis"));
		games.add(new BoardGame("Tigris & Euphrates", "Reiner", "Knizia"));		
		games.add(new BoardGame("La Citta", "Gerd", "Fenchel"));
		games.add(new BoardGame("El Grande", "Wolfgang", "Kramer"));
		games.add(new BoardGame("The Princes of Florence", "Richard", "Ulrich"));
		games.add(new BoardGame("The Traders of Genoa", "Rudiger", "Dorn"));
		games2.add(new BoardGame("Tikal", "M.", "Kiesling"));
		games2.add(new BoardGame("Modern Art", "Reiner", "Knizia"));		
		return root;
	}

	/*
	 * @see IWorkbenchPart#setFocus()
	 */
	public void setFocus() {}

}