001/* 002 * This library is part of OpenCms - 003 * the Open Source Content Management System 004 * 005 * Copyright (C) Alkacon Software (http://www.alkacon.com) 006 * 007 * This library is free software; you can redistribute it and/or 008 * modify it under the terms of the GNU Lesser General Public 009 * License as published by the Free Software Foundation; either 010 * version 2.1 of the License, or (at your option) any later version. 011 * 012 * This library is distributed in the hope that it will be useful, 013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 015 * Lesser General Public License for more details. 016 * 017 * For further information about Alkacon Software, please see the 018 * company website: http://www.alkacon.com 019 * 020 * For further information about OpenCms, please see the 021 * project website: http://www.opencms.org 022 * 023 * You should have received a copy of the GNU Lesser General Public 024 * License along with this library; if not, write to the Free Software 025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 026 */ 027 028package org.opencms.gwt.client.ui.input.upload; 029 030/** 031 * Handler interface for upload buttons which is mainly used to perform actions when the selected file 032 * in a file input has been changed.<p> 033 */ 034public interface I_CmsUploadButtonHandler { 035 036 /** 037 * Custom setup method for newly created file inputs.<p> 038 * 039 * @param fileInput the new file input 040 */ 041 void initializeFileInput(CmsFileInput fileInput); 042 043 /** 044 * Notifies the button handler that the file input field's value has changed.<p> 045 * 046 * @param fileInput the file input 047 */ 048 void onChange(CmsFileInput fileInput); 049 050 /** 051 * This method should be called when the handler is set on a button.<p> 052 * 053 * @param button the button for which the handler instance has been set 054 */ 055 void setButton(I_CmsUploadButton button); 056}