UpdateListener.java

package com.mobilesorcery.sdk.ui;

import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;

public class UpdateListener implements Listener {

    public interface IUpdatableControl {
        public void updateUI();
    }

    private final IUpdatableControl c;
    private boolean active = true;

    public UpdateListener(IUpdatableControl c) {
        this.c = c;
    }

    public void setActive(boolean active) {
        this.active = active;
    }

    @Override
	public void handleEvent(Event event) {
        if (active) {
            c.updateUI();
        }
    }

    /**
     * Utility method to add this listener to several controls
     * @param controls
     */
    public void addTo(int eventType, Control... controls) {
    	for (Control control : controls) {
    		control.addListener(eventType, this);
    	}
    }

    public void removeFrom(int eventType, Control... controls) {
    	for (Control control : controls) {
    		control.removeListener(eventType, this);
    	}
    }

	public boolean isActive() {
		return active;
	}

}