filetreelabelprovider.java

用java 实现的IE browser适合于学者

/*
 * Created on 2005-1-4
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package com.hnjchina.createview;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.LabelProviderChangedEvent;
import org.eclipse.swt.graphics.Image;

/**
 * @author limeiyong
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class FileTreeLabelProvider implements ILabelProvider{
	  //	 The listeners
	  private List listeners;
	  // Images for tree nodes
	  private Image file;
	  private Image dir;
	  // Label provider state: preserve case of file names/directories
	  boolean preserveCase;
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object)
	 */
	public FileTreeLabelProvider(){
		//		 Create the list to hold the listeners
	    listeners = new ArrayList();
	    // Create the images
	    try {
	      file = new Image(null, new FileInputStream("images/file.gif"));
	      dir = new Image(null, new FileInputStream("images/directory.gif"));
	    } catch (FileNotFoundException e) {
	      // Swallow it; we'll do without images
	    }
	}
	public Image getImage(Object element) {
		//		 If the node represents a directory, return the directory image.
	    // Otherwise, return the file image.
	    return ((File) element).isDirectory() ? dir : file;

	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ILabelProvider#getText(java.lang.Object)
	 */
	public String getText(Object element) {
		//		 Get the name of the file
	    String text = ((File) element).getName();

	    // If name is blank, get the path
	    if (text.length() == 0) {
	      text = ((File) element).getPath();
	    }
	    // Check the case settings before returning the text
	    return preserveCase ? text : text.toUpperCase();

	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.IBaseLabelProvider#addListener(org.eclipse.jface.viewers.ILabelProviderListener)
	 */
	public void addListener(ILabelProviderListener listener) {
		listeners.add(listener);

	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.IBaseLabelProvider#dispose()
	 */
	public void dispose() {
//		 Dispose the images
	    if (dir != null) dir.dispose();
	    if (file != null) file.dispose();
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.IBaseLabelProvider#isLabelProperty(java.lang.Object, java.lang.String)
	 */
	public boolean isLabelProperty(Object element, String property) {
		// TODO Auto-generated method stub
		return false;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.IBaseLabelProvider#removeListener(org.eclipse.jface.viewers.ILabelProviderListener)
	 */
	public void removeListener(ILabelProviderListener listener) {
		listeners.remove(listener);
	}
	public	 void	setPreserveCase(boolean preserveCase){
		this.preserveCase = preserveCase;
	    // Since this attribute affects how the labels are computed,
	    // notify all the listeners of the change.
	    LabelProviderChangedEvent event = new LabelProviderChangedEvent(this);
	    for (int i = 0, n = listeners.size(); i < n; i++) {
	      ILabelProviderListener ilpl = (ILabelProviderListener) listeners.get(i);
	      ilpl.labelProviderChanged(event);
	    }		
	}
}