/*
* 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.
*/
package com.smartgwt.client.widgets.events;
import com.google.gwt.event.shared.EventHandler;
public interface DragStartHandler extends EventHandler {
/**
* Executed when dragging first starts. Your widget can use this opportunity to set things up for the drag, such as setting
* the drag tracker. Returning false from this event handler will cancel the drag action entirely. <p> A drag action is
* considered to be begin when the mouse has moved {@link com.smartgwt.client.widgets.Canvas#getDragStartDistance
* dragStartDistance} with the left mouse down.
*
* @param event the event
*/
void onDragStart(com.smartgwt.client.widgets.events.DragStartEvent event);
}