drawnshape.java

使用java application 的共享白板系统

import java.awt.*;
import java.io.Serializable;

public abstract class DrawnShape implements Serializable{
        
        
	public DrawnShape(Color color, int x, int y, String text) {
		this.color = color;
		this.x1 = x;
		this.y1 = y;
		this.x2 = x;
		this.y2 = y;
		this.text = text;
	}
	
	public abstract void draw(Graphics g);
	
	public void changeEnd(int x, int y) {
		x2 = x;
		y2 = y;
	}

	public void makePermanent() {
		perm = true;
	}

	public boolean isPermanent() {
		return perm;
	}

	public Rectangle getBoundingBox() {
		rect.width = x2 > x1 ? x2 - x1 + 1: x1 - x2 + 1;
		rect.height = y2 > y1 ? y2 - y1 + 1: y1 - y2 + 1;
		rect.x = x1 < x2 ? x1 : x2;
		rect.y = y1 < y2 ? y1 : y2;

		return rect;
	}

	// Get the text for the shape
	public String getText() {
		return text;
	}

	protected Color color;		// Pen color
	protected int	x1;			// Start...
	protected int	y1;			// ... point
	protected int	x2;			// End...
	protected int	y2;			// ... point
	protected boolean perm;		// Permanent or not
	protected String text;		// Description
	protected Rectangle rect = new Rectangle();
}