001/* 002 * This library is part of OpenCms - 003 * the Open Source Content Management System 004 * 005 * Copyright (c) Alkacon Software GmbH & Co. KG (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; 029 030import com.google.gwt.event.dom.client.KeyUpEvent; 031import com.google.gwt.event.dom.client.KeyUpHandler; 032import com.google.gwt.event.logical.shared.ValueChangeEvent; 033import com.google.gwt.user.client.ui.TextBox; 034 035/** 036 * A simple text box firing change events whenever a key is pressed and the value has changed.<p> 037 */ 038public class CmsSimpleTextBox extends TextBox { 039 040 /** The previous value. */ 041 private String m_previousValue; 042 043 /** 044 * Constructor.<p> 045 */ 046 public CmsSimpleTextBox() { 047 048 super(); 049 addDomHandler(new KeyUpHandler() { 050 051 public void onKeyUp(KeyUpEvent event) { 052 053 fireChange(); 054 } 055 }, KeyUpEvent.getType()); 056 } 057 058 /** 059 * @see com.google.gwt.user.client.ui.ValueBoxBase#setValue(java.lang.Object, boolean) 060 */ 061 @Override 062 public void setValue(String value, boolean fireEvents) { 063 064 m_previousValue = value; 065 super.setValue(value, fireEvents); 066 } 067 068 /** 069 * Triggered on key press to fire event if the value changed.<p> 070 */ 071 void fireChange() { 072 073 ValueChangeEvent.fireIfNotEqual(this, m_previousValue, getValue()); 074 m_previousValue = getValue(); 075 } 076}