swt中改变树的字体及颜色的实现

package org.eclipse.jface.snippets.viewers1;

import org.eclipse.jface.resource.FontRegistry;
import org.eclipse.jface.viewers.ITableColorProvider;
import org.eclipse.jface.viewers.ITableFontProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.TreeColumn;
/**
 * A simple TreeViewer to demonstrate usage
 * 
 * @author Tom Schindl <[e-mail]>
 * 
 */
public class Snippet014TreeViewerNoneMandatoryLabelProvider {
	private class MyContentProvider implements ITreeContentProvider {
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
		 */
		public Object[] getElements(Object inputElement) {
			return ((MyModel) inputElement).child.toArray();
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
		 */
		public void dispose() {
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer,
		 *      java.lang.Object, java.lang.Object)
		 */
		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
		 */
		public Object[] getChildren(Object parentElement) {
			return getElements(parentElement);
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
		 */
		public Object getParent(Object element) {
			if (element == null) {
				return null;
			}
			return ((MyModel) element).parent;
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
		 */
		public boolean hasChildren(Object element) {
			return ((MyModel) element).child.size() > 0;
		}
	}	public Snippet014TreeViewerNoneMandatoryLabelProvider(Shell shell) {
				final TreeViewer v = new TreeViewer(shell);
				
				TreeColumn column = new TreeColumn(v.getTree(),SWT.NONE);
				column.setWidth(200);
				column.setText("Column 1");
				
				column = new TreeColumn(v.getTree(),SWT.NONE);
				column.setWidth(200);
				column.setText("Column 2");
				
				v.setLabelProvider(new MyLabelProvider());
				v.setContentProvider(new MyContentProvider());
				v.setInput(createModel());
			}
		
			private MyModel createModel() {
		
				MyModel root = new MyModel(0, null);
				root.counter = 0;
		
				MyModel tmp;
				for (int i = 1; i < 10; i++) {
					tmp = new MyModel(i, root);
					root.child.add(tmp);
					for (int j = 1; j < i; j++) {
						tmp.child.add(new MyModel(j, tmp));
					}
				}
		
				return root;
			}
		
			public static void main(String[] args) {
				Display display = new Display();
				Shell shell = new Shell(display);
				shell.setLayout(new FillLayout());
				new Snippet014TreeViewerNoneMandatoryLabelProvider(shell);
				shell.open();
		
				while (!shell.isDisposed()) {
					if (!display.readAndDispatch())
						display.sleep();
				}
		
				display.dispose();
			}
		}

package org.eclipse.jface.snippets.viewers1;
import java.util.ArrayList;
public class MyModel {
			public MyModel parent;
	
			public ArrayList child = new ArrayList();
	
			public int counter;
	
			public MyModel(int counter, MyModel parent) {
				this.parent = parent;
				this.counter = counter;
			}
	
			public String toString() {
				String rv = "Item ";
				if (parent != null) {
					rv = parent.toString() +".";
				}
	
				rv += counter;
	
				return rv;
			}
		}

package org.eclipse.jface.snippets.viewers1;
import org.eclipse.jface.resource.FontRegistry;
import org.eclipse.jface.viewers.ITableColorProvider;
import org.eclipse.jface.viewers.ITableFontProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
	public class MyLabelProvider extends LabelProvider implements
			ITableLabelProvider, ITableFontProvider, ITableColorProvider {
		FontRegistry registry = new FontRegistry();
		public Image getColumnImage(Object element, int columnIndex) {
			return null;
		}
		public String getColumnText(Object element, int columnIndex) {
			return "Column " + columnIndex + " => " + element.toString();
		}
		public Font getFont(Object element, int columnIndex) {
			if (((MyModel) element).counter % 2 == 0) {
				return registry.getBold(Display.getCurrent().getSystemFont()
						.getFontData()[0].getName());
			}
			return null;
		}
		public Color getBackground(Object element, int columnIndex) {
			if (((MyModel) element).counter % 2 == 0) {
				return Display.getCurrent().getSystemColor(SWT.COLOR_RED);
			}
			return Display.getCurrent().getSystemColor(SWT.COLOR_BLUE);
		}
		public Color getForeground(Object element, int columnIndex) {
			if (((MyModel) element).counter % 2 == 1) {
				return Display.getCurrent().getSystemColor(SWT.COLOR_RED);
			}
			return Display.getCurrent().getSystemColor(SWT.COLOR_BLUE);
		}
	}