resshape.java

Java画板

package test.paint;


import java.awt.*;
import java.awt.event.MouseEvent;

/**
 * ResShape抽象类，实现MyShape接口
 * PolyLine将继承此类
 * 作者：钟雯
 * 初始时间：2007 5-15
 * 最后一次修改时间：2007 6-13
 */


public abstract class ResShape implements MyShape {
	
	    //变量全部声明为protected型，以便子类直接访问
	
	    //当前颜色
	    protected Color color;
	    
	    //当前宽度
	    protected Stroke stroke;
	    
	    //一个PointsSet对象，记录点
	    protected PointsSet pointsSet;
	    
	    //记录画刷是是画椭圆模式还是方形模式  flag = 0是椭圆 flag = 1是方形 
	    protected int flag;
	    
	    //椭圆的半径
	    protected int radius = 0;
	    
	    
	    /**
	     *有参构造函数
	     */
	    protected ResShape(Color c, Stroke s, int x, int y,int z,int f ) {
	        this();
	        color = c;
	        stroke = s;
	        pointsSet.addPoint(x, y);
	        radius = z;
	        flag = f;
	    }
	    
	    /**
	     *无参构造函数
	     */
	    protected ResShape() {
	        pointsSet = new PointsSet(50);
	    }
	    
	    //当鼠标拖动的时候记录点的轨迹
	    public void processCursorEvent(MouseEvent e, int t) {
	        if (t != MyShape.CURSOR_DRAGGED)
	            return;
	        pointsSet.addPoint(e.getX(), e.getY());
	    }
	    
	    //获得图形基本数据，用于保存文件 
	    public String getShapeData() {
	        int si = 0;
	        for (int i=0; i<MyPanel.STROKES.length; i++) {
	            if (stroke == MyPanel.STROKES[i]) {
	                si = i;
	                break;
	            }
	        }
	        StringBuffer buffer = new StringBuffer();
	        buffer.append(color.getRGB());
	        buffer.append(":");
	        buffer.append(si);
	        int[][] ps = pointsSet.getPoints();
	        for (int i=0; i<ps[0].length; i++) {
	            buffer.append(":");
	            buffer.append(ps[0][i]);
	            buffer.append(":");
	            buffer.append(ps[1][i]);
	        }
	        buffer.append(":");
	        buffer.append(radius);
	        buffer.append(":");
	        buffer.append( flag );
	        buffer.append(":");
	        return buffer.toString();
	    }
	    
	    
	    //打开文件时，将图片相关信息还原
	    public void setShapeData(String data) throws Exception {
	        String splits[] = data.split(":");
	        color = new Color(Integer.parseInt(splits[0]));
	        stroke = MyPanel.STROKES[Integer.parseInt(splits[1])];
	        for (int i=2; i<splits.length-2; i+=2) {
	            pointsSet.addPoint(Integer.parseInt(splits[i]),
	                    Integer.parseInt(splits[i+1]));
	        }
	        radius = Integer.parseInt( splits[splits.length-2] );
	        flag = Integer.parseInt(splits[splits.length-1] );
	    }
	    
	  
 }