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.util; 029 030import com.google.gwt.dom.client.Element; 031import com.google.gwt.dom.client.Style.Unit; 032import com.google.gwt.user.client.Command; 033 034/** 035 * Move animation. Moving the given element from it's start to it's end position 036 * and executing the given call-back on complete.<p> 037 * 038 * @since 8.0.0 039 */ 040public class CmsMoveAnimation extends A_CmsAnimation { 041 042 /** The element. */ 043 private Element m_element; 044 045 /** The end left. */ 046 private int m_endLeft; 047 048 /** The end top. */ 049 private int m_endTop; 050 051 /** The start left. */ 052 private int m_startLeft; 053 054 /** The start top. */ 055 private int m_startTop; 056 057 /** 058 * Constructor. Setting the element to animate, it's start and end position.<p> 059 * 060 * @param element the element 061 * @param startTop the start top 062 * @param startLeft the start left 063 * @param endTop the end top 064 * @param endLeft the end left 065 * @param callback the call-back to execute on complete 066 */ 067 public CmsMoveAnimation(Element element, int startTop, int startLeft, int endTop, int endLeft, Command callback) { 068 069 super(callback); 070 m_element = element; 071 m_startTop = startTop; 072 m_startLeft = startLeft; 073 m_endTop = endTop; 074 m_endLeft = endLeft; 075 } 076 077 /** 078 * @see com.google.gwt.animation.client.Animation#onUpdate(double) 079 */ 080 @Override 081 protected void onUpdate(double progress) { 082 083 progress = progress * progress; 084 double newTop = m_startTop + ((m_endTop - m_startTop) * progress); 085 double newLeft = m_startLeft + ((m_endLeft - m_startLeft) * progress); 086 m_element.getStyle().setTop(newTop, Unit.PX); 087 m_element.getStyle().setLeft(newLeft, Unit.PX); 088 } 089}