drawsrmodel.java

面向对象的设计思想

import java.awt.Color;
import java.net.*;
import java.awt.Shape;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.util.*;

import javax.swing.JOptionPane;
import java.util.*;
public class DrawSrModel implements DrawModel
{
	// model data
	private int selected;
	private ArrayList<SubShape> shapes;
	private Shape s;
	private SubShape now;
	private int rec,tmpX1,tmpY1	;
	private double w,h;
	private boolean jug=false;
	public static final int LIN=1;
	public static final int REC=2;
	public static final int CIR=3;
	public static final int SF=4;
	public static final int MOVE=5;
	// model listener management data structures
	//private ArrayList<Socket> mlisteners ;
	private ArrayList listeners = new ArrayList(10);
	  
	public DrawSrModel() 
	{
		selected=LIN;
		shapes=new ArrayList<SubShape>();
		//mlisteners=new ArrayList<DrawController> ();
	}
	// state query methods
	public void setSel(int x)
	{
		selected=x;
	}
	
	public void setP1(int x,int y)
	{
		if(selected==SF)
		{
				jug=false;
				SubShape tmp=null;
				for(int i=0;i<shapes.size();i++)
				{
					tmp=shapes.get(i);
					int xs=(tmp.x2 > tmp.x1 ? tmp.x1 : tmp.x2);
					int ys=(tmp.y2 > tmp.y1 ? tmp.y1 : tmp.y2);
					int xe=(tmp.x2 < tmp.x1 ? tmp.x1 : tmp.x2);
					int ye=(tmp.y2 < tmp.y1 ? tmp.y1 : tmp.y2);
					if(xs<=x&&xe>=x&&ys<=y&&ye>=y)
					{
						System.out.println("Shape "+i);
						jug=true;
						rec=i;
						w=Math.abs(tmp.x1-tmp.x2);
						h=Math.abs(tmp.y1-tmp.y2);
						if(tmp.select==LIN){
							tmpX1=tmp.x1;
							tmpY1=tmp.y1;
						}
						else{
						tmpX1=xs;
						tmpY1=ys;
						}
					}
					
				}
				if (jug==false)
				{
					JOptionPane.showMessageDialog(null,"选择的点不在图形内，请重新选择^_^");
					return;
				}
		}
		else if(selected==MOVE)
		{
			jug=false;
			SubShape tmp=null;
			for(int i=0;i<shapes.size();i++)
			{
				tmp=shapes.get(i);
				int xs=(tmp.x2 > tmp.x1 ? tmp.x1 : tmp.x2);
				int ys=(tmp.y2 > tmp.y1 ? tmp.y1 : tmp.y2);
				int xe=(tmp.x2 < tmp.x1 ? tmp.x1 : tmp.x2);
				int ye=(tmp.y2 < tmp.y1 ? tmp.y1 : tmp.y2);
				if(xs<=x&&xe>=x&&ys<=y&&ye>=y)
				{
					jug=true;
					rec=i;
					tmpX1=xs;
					tmpY1=ys;
					w=Math.abs(tmp.x1-tmp.x2);
					h=Math.abs(tmp.y1-tmp.y2);
					
				}
				
			}
			if (jug==false)
			{
				JOptionPane.showMessageDialog(null,"选择的点不在图形内，请重新选择^_^");
				return;
			}
	}
		else{
		tmpX1=x;
		tmpY1=y;}
	}
	public int getP1x(){
		return tmpX1;
	}
	public int getP1y(){
		return tmpY1;
	}
	
	//用于打开文件时获得图形信息
	public ArrayList<SubShape> getShapes()
	{
		return (ArrayList<SubShape>)shapes.clone();
	}
	//用于添加在一张画布中所要记录下的图形
	public void addShapes(SubShape shape)
	{
		shapes.add(shape);
	}
	//在新建时 倾空桌布上所记录的图形
	public ArrayList<SubShape> deletShapes()
	{
		shapes=new ArrayList<SubShape>();
		//fireModelChangeEvent();
		return shapes;
	}
	 
	// listener registration method
	public void addModelChangeListener(DrawCanvas canvas) 
	{
		listeners.add(canvas);
	}  
	public ArrayList<SubShape> add(int x1,int y1,int x2,int y2)
	{
		int x,y,xs,ys;
		switch (selected) {
		case LIN:
			now=new SubShape(selected,x1,y1,x2,y2);
			addShapes(now);
			break;
		case REC:
			now=new SubShape(selected,x1,y1,x2,y2);
			addShapes(now);
			break;
		case CIR:
			now=new SubShape(selected,x1,y1,x2,y2);
			addShapes(now);
			
			break;
		case SF:
			if(shapes.get(rec).select==LIN)
				now = new SubShape(LIN,tmpX1,tmpY1,x2,y2);
			else if(shapes.get(rec).select==REC)
				now = new SubShape(REC,tmpX1,tmpY1, x2,y2);
			else if(shapes.get(rec).select==CIR)
					now = new SubShape(CIR,tmpX1,tmpY1, x2,y2);
				shapes.remove(rec);
				shapes.add(now);
			
			
			break;
		case MOVE:
			
			if(shapes.get(rec).select==LIN)
			{	
				 x=(int)(x2-w/2);
			    y=(int)(y2-h/2);
				xs=(int)(x2+w/2);
				ys=(int)(y2+h/2);
				now = new SubShape(LIN,x,y,xs,ys);
			}
			else if(shapes.get(rec).select==REC)
			{
				x=(int)(x2-w/2);
			    y=(int)(y2-h/2);
				xs=(int)(x2+w/2);
				ys=(int)(y2+h/2);
				now = new SubShape(REC,x, y, xs,ys);
			}
			else if(shapes.get(rec).select==CIR)
			{	
				x=(int)(x2-w/2);
				y=(int)(y2-h/2);
				xs=(int)(x2+w/2);
				ys=(int)(y2+h/2);
				now = new SubShape(CIR,x, y, xs,ys);
			}
				shapes.remove(rec);
				shapes.add(now);
			break;
		default:
			break;
		}
			return shapes;
	}
	
}