/*
 * Copyright 2006 Mat Gessel <mat.gessel@gmail.com>
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.litesoft.GWT.client.widgets.nonpublic.external;

import com.google.gwt.user.client.*;
import com.google.gwt.user.client.ui.*;

/**
 * A widget wrapper which can process the
 * wrapped widget's events.
 */
public abstract class EventWrapper extends Composite
{
    private Widget m_widget;

    /**
     * Default constructor for convenience. You will need to call
     * {@link #initWidget(Widget)} before calling any {@link Widget} methods.
     */
    public EventWrapper()
    {

    }

    public EventWrapper( Widget w, int eventMask )
    {
        initWidget( w );
        sinkEvents( eventMask );
    }

    /*
      * (non-Javadoc)
      * @see com.google.gwt.user.client.ui.Composite#initWidget(com.google.gwt.user.client.ui.Widget)
      */
    protected void initWidget( Widget widget )
    {
        super.initWidget( widget );
        m_widget = widget;
    }

    protected Widget getWidget()
    {
        return m_widget;
    }

    /*
      *  (non-Javadoc)
      * Hijacks events intended for the wrapped widget's element.
      * @see com.google.gwt.user.client.ui.Widget#onAttach()
      */
    protected void onAttach()
    {
        super.onAttach();
        DOM.setEventListener( getElement(), this );
    }

    /**
     * Override to process browser events. Don't forget to call super
     * implementation if you want the wrapped widget to process events also.
     * {@inheritDoc}
     */
    public void onBrowserEvent( Event event )
    {
        m_widget.onBrowserEvent( event );
    }
}