imageview.java

时空图计算和编辑程序

package my_cpt;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Calendar;

import super_cpt.*;
import javax.imageio.ImageIO;

import data2.Global;
public class ImageView extends SuperFrame implements ActionListener{

	/**
	 * 图像浏览器
	 */
	private BufferedImage myImage;
	//protected Scrollbar scroll=new Scrollbar(Scrollbar.HORIZONTAL);//水平滚动条
	public final int mode;
	public static final int SYSDISPOSE=1;
	public static final int UNVISIBLE=2;
	private Rectangle  imgbounds=new Rectangle();
	private StateBtn savebtn=new StateBtn("保存图像");
	private StateBtn clsbtn=new StateBtn("关闭图像");
	public ImageView(int windowmode)
	{
		super("图像浏览器");
		setSize(400,300);
		setLocation(312,184);
		mode=windowmode;
		add(savebtn);
		add(clsbtn);
		savebtn.setSize(70,20);
		clsbtn.setSize(70,20);
		savebtn.setLocation(getWidth()/2-70,getHeight()-25);
		clsbtn.setLocation(getWidth()/2,getHeight()-25);
		savebtn.addActionListener(this);
		clsbtn.addActionListener(this);
	}
	public void FrameExit()
	{
		switch(mode)
		{
		case SYSDISPOSE:
			dispose();
			break;
		case UNVISIBLE:
			setVisible(false);
			break;
		}
	}
	public void actionPerformed(ActionEvent e)
	{
		if(e.getSource()==savebtn)
		{
			if(myImage==null)return;
			File file=new File(Global.OUTPUT_DIR);
			if(!file.exists())
				file.mkdir();
			Calendar date=Calendar.getInstance();
			String filename=Global.OUTPUT_DIR+"\\"+date.get(Calendar.HOUR_OF_DAY)
							+date.get(Calendar.MINUTE)+date.get(Calendar.MINUTE)
							+Global.IMAGEFORM;
			try
			{
				ImageIO.write(myImage,"PNG",new File(filename));
				this.setTitle("图像浏览器-"+filename+"已保存.");
				repaint(0,0,getWidth(),25);
			}catch(Exception ex){}
		}
		if(e.getSource()==clsbtn)
		{
			FrameExit();
		}
	}
	public void setImage(final BufferedImage img)
	{
		myImage=img;
		if(img==null)return;
		double x=0,y=0,w=0,h=0;
		double iw=img.getWidth(),ih=img.getHeight();
		int rangeW=getWidth()-10,rangeH=getHeight()-50,rx=5,ry=22;
		if(iw<rangeW && ih<rangeH)
		{
			x=rx+rangeW/2-iw/2;
			y=ry+rangeH/2-ih/2;
			w=iw;h=ih;
			imgbounds.setBounds((int)x,(int)y,(int)w,(int)h);
			return;
		}
		double rate2=(double)(getWidth()-10)/(getHeight()-50);
		if(iw/ih>rate2)
		{
			w=rangeW;
			h=ih*w/iw;
		}else
		{
			h=rangeH;
			w=iw*h/ih;
		}
		x=rx+rangeW/2-w/2;
		y=ry+rangeH/2-h/2;
		imgbounds.setBounds((int)x,(int)y,(int)w,(int)h);
		repaint();
	}
	public void setVisible(boolean bool)
	{
		if(bool)
			setTitle("图像浏览器");
		super.setVisible(bool);
		if(bool)
			repaint();
	}
	public void myPaint(Graphics2D g2)
	{
		if(myImage!=null)
			g2.drawImage(myImage,imgbounds.x,imgbounds.y,imgbounds.width,imgbounds.height,this);
		else
			g2.drawString("目前没有有效的图片",getWidth()/2-58,getHeight()/2-12);
	}
	
}