import java.awt.*;
import java.util.*;

public class ItmInfo{
	public Component cmp;
	public Vector lst;
	Itm sel;
	public ItmInfo(Component cmp){
		this.cmp = cmp;
		lst = new Vector();
		sel = null;
	}
	public void add(Itm itm){
		itm.set(this);
		setSel(itm);
		lst.addElement(itm);
	}
	public void del(Itm itm){
		if(itm==sel) setSel(null);
		Enumeration e = itm.depdel.elements();
		while(e.hasMoreElements()){
			del((Itm)e.nextElement());
		}
		lst.removeElement(itm);
	}
	public void del(){
		if(sel==null) return;
		del(sel);
	}

	public int num(int z){
		int cnt=0;
		for(int i=0;i<size();i++){
			if(get(i).z==z) cnt++;
		}
		return cnt;
	}
	public Itm[] getArr(int z){
		Itm[] arr = new Itm[num(z)];
		int j=0;
		for(int i=0;i<size();i++){
			Itm itm = get(i);
			if(itm.z == z) arr[j++] = itm;
		}
		return arr;
	}

	public int size(){
		return lst.size();
	}
	public Itm get(int i){
		return (Itm)lst.elementAt(i);
	}
	public Itm getSel(){
		return sel;
	}

	void setSel(Itm itm){
		if(sel!=null) sel.setSel(false);
		if(itm!=null) itm.setSel(true);
		sel = itm;
	}
	public Itm hitItm(Point p){
		Itm near = null;
		Enumeration e = lst.elements();
		while(e.hasMoreElements()){
			Itm itm = (Itm)e.nextElement();
			if(!itm.chkHit(p)) continue;
			if(near==null){ near = itm; continue; }
			if(itm.z>near.z){ near = itm; continue; }
			if(near!=null) if(near.len(p)<itm.len(p)) continue;
			near = itm;
		}
		return near;
	}
	public boolean mouseDown(Event e, int x, int y){
		Itm selBk = sel;
		setSel(null);
		Point p = new Point(x,y);
		Itm hit = hitItm(p);
		if(hit!=null) setSel(hit);
		return selBk != sel;
	}
	public boolean mouseDrag(Event e, int x, int y){
		return false;
	}
	public boolean mouseUp(Event e, int x, int y){
		return false;
	}
	public void update(Graphics g){
		Itm[] s = sortItms();
		for(int i=0;i<s.length;i++){
			s[i].update(g);
		}
	}
	public Itm[] sortItms(){
		Vector v = new Vector();
		Enumeration e = lst.elements();
		while(e.hasMoreElements()){
			Itm itm = (Itm)e.nextElement();
			int i;
			for(i=0;i<v.size();i++){
				Itm vitm = (Itm)v.elementAt(i);
				if(itm.z<vitm.z) break;
			}
			v.insertElementAt(itm, i);
		}
		Itm[] res = new Itm[v.size()];
		for(int i=0;i<res.length;i++){
			res[i] = (Itm)v.elementAt(i);
		}
		return res;
	}
}

// EOF