exportgif.java

来自「用Java开发的、实现类似Visio功能的应用程序源码」· Java 代码 · 共 82 行

/**
 *    $Id: ExportGIF.java $
 *
 *    Copyright 2004 ~ 2005 JingFei International Cooperation LTD. All rights reserved.
 *
 */
package com.jfimagine.jfgraph.transfer;

                                               
                                                
import java.awt.Color;
import java.awt.Dimension;
import java.io.File;
import java.io.IOException;

import org.freehep.graphics2d.VectorGraphics;
import org.freehep.graphicsio.gif.GIFGraphics2D;

import com.jfimagine.utils.log.*;

 /**
 * ExportGIf class is used to output GIF images.
 *
 * @author     CookieMaker    
 *
 * @version $Revision: 1.3.0 $
 */ 
 
public class ExportGIF extends ExportBase{

    	/**an internal log utility*/
    	private JFLogger m_logger	=JFLogManager.getLogger(this.getClass());
    	
   	/** 
    	*  Export current page or list to a specified file.
    	*  @param fileName A specified file name to be exported.
    	*/
   	public boolean export(String fileName){
		try{   
        		
			prepareExport(); 
			
			int width	=getExportWidth();
			int height	=getExportHeight();

			VectorGraphics g = new GIFGraphics2D(new File(fileName), new Dimension(width,height)); 
    			g.startExport(); 
        		
        		//clear graphics.
        		g.setColor(Color.white);
        		g.fillRect(0, 0, width, height);
        		    			
    			draw(g);
    			g.endExport();
        		
        		return true;   
        		        		        		
        	}catch(IOException e){
        		m_logger.error("export: "+e);
        		return false;
        	}
        	
       }
 
   	/** 
    	*  get export file extension.
    	*  @return the export file extension.
    	*/
   	public String getExportFileExt(){
   		return JFFileFilter.FILEEXT_GIF;
	}

   	/** 
    	*  get export file description
    	*  @return the export file description
    	*/
   	public String getExportFileDesc(){
   		return JFFileFilter.FILEDESC_GIF;
	}
 
}