/*
 * Smart GWT (GWT for SmartClient)
 * Copyright 2008 and beyond, Isomorphic Software, Inc.
 *
 * Smart GWT is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 3
 * as published by the Free Software Foundation.  Smart GWT is also
 * available under typical commercial license terms - see
 * http://smartclient.com/license
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 */
/* sgwtgen */
 
package com.smartgwt.client.widgets.form.fields.events;

import com.smartgwt.client.event.*;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.event.shared.HasHandlers;
public interface HasShowValueHandlers extends HasHandlers {
    /**
     * This method will be called whenever this FormItem's value is being set via a programmatic call to e.g: {@link
     * com.smartgwt.client.widgets.form.DynamicForm#setValues DynamicForm.setValues()} or {@link
     * com.smartgwt.client.widgets.form.fields.FormItem#setValue FormItem.setValue()} and may be overridden by CanvasItems
     * intended to support displaying data values to update the embedded Canvas to reflect the value passed in. Note that the
     * first parameter will be a  formatted value - while the second parameter will contain the underlying data value for the
     * item.
     *
     * @param handler the showValue handler
     * @return {@link HandlerRegistration} used to remove this handler
     */
    HandlerRegistration addShowValueHandler(ShowValueHandler handler);
}
