freeshape.java

windows画图板.类似于windows自带的画图程序!

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

/**
 *
 * @author hysun
 */
public class FreeShape implements IShape {
    
    protected Color color;
    
    protected Stroke stroke;
    
    protected PointsSet pointsSet;
    
    protected FreeShape(Color c, Stroke s, int x, int y) {
        this();
        color = c;
        stroke = s;
        pointsSet.addPoint(x, y);
    }
    
    protected FreeShape() {
        pointsSet = new PointsSet(50);
    }
    
    public void processCursorEvent(MouseEvent e, int t) {
        if (t != IShape.CURSOR_DRAGGED)
            return;
        pointsSet.addPoint(e.getX(), e.getY());
    }
    
    /**
     * This method is only used by PolyLine in this application, so it can be
     * put in the implementation of PolyLine instead of here. However, considering
     * further extension by adding subclasses to the FreeShape class, i choose
     * to put it here.
     */
    public String getShapeData() {
        int si = 0;
        for (int i=0; i<DrawingBoard.STROKES.length; i++) {
            if (stroke == DrawingBoard.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]);
        }
        return buffer.toString();
    }
    
    /**
     * This method is only used by PolyLine in this application, so it can be
     * put in the implementation of PolyLine instead of here. However, considering
     * further extension by adding subclasses to the FreeShape class, i choose
     * to put it here.
     */
    public void setShapeData(String data) throws Exception {
        String splits[] = data.split(":");
        color = new Color(Integer.parseInt(splits[0]));
        stroke = DrawingBoard.STROKES[Integer.parseInt(splits[1])];
        for (int i=2; i<splits.length; i+=2) {
            pointsSet.addPoint(Integer.parseInt(splits[i]),
                    Integer.parseInt(splits[i+1]));
        }
    }
    
    public Point getSouthEastMostPoint() {
        int[][] points = pointsSet.getPoints();
        if (points == null)
            return new Point(0, 0);
        int mx=0, my=0;
        for (int i=0; i<points[0].length; i++) {
            if (points[0][i] > mx)
                mx = points[0][i];
            if (points[1][i] > my)
                my = points[1][i];
        }
        return new Point(mx, my);
    }

	public void draw(Graphics2D g) {
		// TODO Auto-generated method stub
		
	}
    
}