dragable.java

Java实现的常用数据结构算法

package Graphics;
import java.awt.Point;
import java.awt.event.*;
import java.awt.*;
public abstract class Dragable implements State ,MouseListener {
    public Point position;
	public int state;
	public Color color;
	//public Point getPosition() {}
	public void setPosition(int xs,int ys) {
		position.x=xs;
		position.y=ys;
	}
	public void setPosition(Point p){
		setPosition(p.x,p.y);
	}
	public boolean isSelected(int xs,int ys){
		if((position.x-xs<4)&&(position.y-ys<4)){
			return true;
		}
		return false;
	}
	public void setColor(int i){
		switch(i){
			case(Performed): this.color=Color.blue; break;
			case(Losted):   this.color= Color.gray;break;
			case(Selected): this.color= Color.black;break;
			case(Visited): this.color= Color.red;break;
			default: this.color= Color.blue;
		}
	}
	public boolean isSelected(Point p){
		return isSelected(p.x,p.y);
	}
	public abstract void draw(Graphics g);
	public Color getColor(){
		switch(state){
			case(Performed): return Color.blue; 
			case(Losted):   return Color.gray;
			case(Selected): return Color.black;
			case(Visited): return Color.red;
			default: return Color.blue;
		}
	}
	public void mouseEntered(MouseEvent e){
	   
		this.state=State.Performed;
	}
	public void mouseExited(MouseEvent e){
		this.state=State.Losted;
	}
	public void mouseClicked(MouseEvent e){
		this.state=State.Selected;
	}
	public void mousePressed(MouseEvent e){
		this.state=State.Visited;
		this.position=e.getPoint();
	}
	public void mouseReleased(MouseEvent e){
	}/* */
}