package org.jzy3d.chart.controllers;

import java.util.ArrayList;
import java.util.List;
import java.util.Vector;

import org.jzy3d.chart.Chart;
import org.jzy3d.events.ControllerEvent;
import org.jzy3d.events.ControllerEventListener;

public class AbstractController {
    public AbstractController() {
    }

    public AbstractController(Chart chart) {
        register(chart);
    }

    public void register(Chart chart){
        if(targets==null)
            targets = new ArrayList(1);
        targets.add(chart);
    }
    
    public void unregister(Chart chart){
        if(targets!=null){
            targets.remove(chart);
        }   
    }
    
    protected Chart chart(){
        return targets.get(0);
    }
    
    public void dispose(){
        targets.clear();
        controllerListeners.clear();
    }

    public void addControllerEventListener(ControllerEventListener listener){
        controllerListeners.add(listener);
    }
    
    public void removeControllerEventListener(ControllerEventListener listener){
        controllerListeners.remove(listener);
    }
    
    protected void fireControllerEvent(ControllerType type, Object value){
        ControllerEvent e = new ControllerEvent(this, type, value);
        for(ControllerEventListener listener: controllerListeners)
            listener.controllerEventFired(e);
    }
    
    protected List targets;
    protected Vector controllerListeners = new Vector(1);
}