Application: gvSIG desktop » Library: org.gvsig.tools

package org.gvsig.tools.swing.impl;

import org.gvsig.tools.swing.api.ChangeListenerHelper;

import java.util.HashSet;

import java.util.Iterator;

import java.util.Set;

import javax.swing.event.ChangeEvent;

import javax.swing.event.ChangeListener;

public class DefaultChangeListenerHelper implements ChangeListenerHelper {

    protected Set listeners = new HashSet();

    protected boolean enabled;

    public DefaultChangeListenerHelper() {

        this.enabled = true;

    }

    @Override

    public void addChangeListener(ChangeListener listener) {

        listeners.add(listener);

    }

    @Override

    public ChangeListener[] getChangeListeners() {

        return (ChangeListener[]) this.listeners.toArray(new ChangeListener[this.listeners.size()]);

    }

    @Override

    public boolean hasChangeListeners() {

        return !this.listeners.isEmpty();

    }

    @Override

    public void removeChangeListener(ChangeListener listener) {

        listeners.remove(listener);

    }

    @Override

    public void removeAllChangeListener() {

        this.listeners.clear();

    }

    @Override

    public void fireEvent() {

        this.fireEvent(null);

    }

    @Override

    public void fireEvent(ChangeEvent event) {

        if( !this.enabled ) {

            return;

        }

        Iterator it = this.listeners.iterator();

        while (it.hasNext()) {

            ChangeListener listener = (ChangeListener) it.next();

            listener.stateChanged(event);

        }

    }

    @Override

    public void setEnabledEvents(boolean enabled) {

        this.enabled = enabled;

    }

    @Override

    public boolean isEnabledEvents() {

        return this.enabled;

    }

}