imageframe.java

Java实现的图片阅览程序

import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.Image;
import java.awt.Graphics2D;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.image.*; 
import java.awt.event.*;
import java.awt.RenderingHints; 
import java.awt.geom.*;

public class ImageFrame extends JFrame {

	public ImageFrame(ImagePanel p)		//构造函数
	{
		iPanel=p;
		
		//初始化
		Toolkit kit=Toolkit.getDefaultToolkit();
		Dimension screenSize=kit.getScreenSize();
		setBounds(screenSize.width/2-screenSize.width*3/8,screenSize.height/2-screenSize.height*3/8,screenSize.width*3/4,screenSize.height*3/4);
		Container contentPane=getContentPane();
		contentPane.setLayout(new BorderLayout());		
		
		l=new JLabel();
		contentPane.add(new JScrollPane(l),BorderLayout.CENTER);
		
		tBar=new JToolBar();
		
		//设置工具栏
		tBar.add(new ChangeImageAction(-1));		
		tBar.add(new ChangeImageAction(1));
		tBar.add(new ZoomAction(2));
		tBar.add(new ZoomAction(0));
		tBar.add(new RotateAction(-1));
		tBar.add(new RotateAction(1));
		tBar.add(new BrowseAction());
		
		contentPane.add(tBar,BorderLayout.NORTH);
		
		super.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e){		//响应关闭事件
				setVisible(false);
			}
		});
	}
	
	public void setImage(BufferedImage bi,int i)		//设置所显示图像
	{
		int w=bi.getWidth();
		int h=bi.getHeight();
		
		image=bi;
		iNum=i;
		
		imageShow=new BufferedImage(w,h,BufferedImage.TYPE_INT_ARGB);
		imageShow.createGraphics().drawImage(bi,0,0,null);
		l.setIcon(new ImageIcon(imageShow));		//显示该图像
		l.setHorizontalAlignment(JLabel.CENTER);
	}
	
	public void setImage(BufferedImage bi)		//类内部使用以更换当前显示图像
	{
		int w=bi.getWidth();
		int h=bi.getHeight();
		
		imageShow=new BufferedImage(w,h,BufferedImage.TYPE_INT_ARGB);
		imageShow.createGraphics().drawImage(bi,0,0,null);
		l.setIcon(new ImageIcon(imageShow));		//显示该图像
		l.setHorizontalAlignment(JLabel.CENTER);
	}
	
	public void showMessage(Object o){		//弹出错误提示
		JOptionPane.showMessageDialog(this,o);
	}
	
	class BrowseAction extends AbstractAction		//返回浏览模式
	{
		public BrowseAction()
		{
			ImageIcon i=new ImageIcon(getClass().getResource("icon/browse.JPG"));
			putValue(Action.NAME,"Browse");
			putValue(Action.SHORT_DESCRIPTION,"浏览图像");
			putValue(Action.SMALL_ICON,i);
		}
		public void actionPerformed(ActionEvent e)
		{
			setVisible(false);
		}
	}
	
	class ZoomAction extends AbstractAction		//对图像进行缩放处理
	{
		public ZoomAction(int s){
			if(s==2)
			{		//放大图标初始化
				ImageIcon i=new ImageIcon(getClass().getResource("icon/zoom+.JPG"));
				putValue(Action.NAME,"Zoom+");
				putValue(Action.SHORT_DESCRIPTION,"放大");
				putValue(Action.SMALL_ICON,i);
				style=2;
			}
			else
			{		//缩小图标初始化
				ImageIcon i=new ImageIcon(getClass().getResource("icon/zoom-.JPG"));
				putValue(Action.NAME,"Zoom-");
				putValue(Action.SHORT_DESCRIPTION,"缩小");
				putValue(Action.SMALL_ICON, i);
				style=0.5;
			}
		}
		public void actionPerformed(ActionEvent e)
		{
			int newW=(int)(imageShow.getWidth()*style);		//计算改变后图像大小
			int newH=(int)(imageShow.getHeight()*style);
			
			try{
				BufferedImage bi=new BufferedImage(newW,newH,BufferedImage.TYPE_4BYTE_ABGR);
				Graphics2D g2d=bi.createGraphics();
			
				g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
				g2d.drawImage( imageShow,0,0,newW,newH,null);		//画出图像
			
				setImage(bi);		//显示图像
				bi.flush();
			}catch(OutOfMemoryError er){
				showMessage(er);
			}
		}
		double style;
	}
	
	class RotateAction extends AbstractAction		//对图像进行旋转处理
	{
		public RotateAction(int s)
		{
			style=s;
			if(style==1)
			{		//顺时针旋转图标初始化
				ImageIcon i=new ImageIcon(getClass().getResource("icon/rotatec.JPG"));
				putValue(Action.NAME,"rotate");
				putValue(Action.SHORT_DESCRIPTION,"顺时针旋转");
				putValue(Action.SMALL_ICON,i);
			}
			else
			{		//逆时针旋转图标初始化
				ImageIcon i=new ImageIcon(getClass().getResource("icon/rotateanti.JPG"));
				putValue(Action.NAME,"rotateanti");
				putValue(Action.SHORT_DESCRIPTION,"逆时针旋转");
				putValue(Action.SMALL_ICON,i);
			}
		}
		public void actionPerformed(ActionEvent e)
		{
			int w=imageShow.getWidth();
			int h=imageShow.getHeight();
			int angle;
			
			if(style==1)
				angle=90;
			else
				angle=270;
			
			try{
				AffineTransform at=AffineTransform.getRotateInstance( Math.toRadians(angle),w/2,h/2);		//设置旋转参数
				AffineTransformOp ato=new AffineTransformOp(at,AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
			
				BufferedImage bi=new BufferedImage(h,w,BufferedImage.TYPE_INT_ARGB);
			
				ato.filter(imageShow,bi);		//转换图像

				setImage(bi);		//显示图像
				bi.flush();
			}catch(OutOfMemoryError er){
				showMessage(er);
			}
		}
		int style;
	}
	
	class ChangeImageAction extends AbstractAction		//切换图像处理
	{
		public ChangeImageAction(int s)
		{
			style=s;
			if(style==1)
			{
				ImageIcon i=new ImageIcon(getClass().getResource("icon/next.JPG"));
				putValue(Action.NAME,"next");
				putValue(Action.SHORT_DESCRIPTION,"下一个图像");
				putValue(Action.SMALL_ICON,i);
			}
			else
			{
				ImageIcon i=new ImageIcon(getClass().getResource("icon/previous.JPG"));
				putValue(Action.NAME,"previous");
				putValue(Action.SHORT_DESCRIPTION,"上一个图像");
				putValue(Action.SMALL_ICON,i);
			}
		}
		public void actionPerformed(ActionEvent e)
		{
			if(style==1)
				iPanel.setImage(iNum+1);		//下一个图像
			else
				iPanel.setImage(iNum-1);		//上一个图像	
		}
		int style;
	}
	
	static BufferedImage image;		//原始图像
	static BufferedImage imageShow;		//显示的图像
	JLabel l;
	JToolBar tBar;
	ImagePanel iPanel;
	int iNum;		//当前显示图像的数组号
}