Pithos_GSS » GSS

/*

 * Copyright 2008, 2009, 2010 Electronic Business Systems Ltd.

 *

 * This file is part of GSS.

 *

 * GSS is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * GSS 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with GSS.  If not, see <http://www.gnu.org/licenses/>.

 */

package org.gss_project.gss.web.client.animation;

import com.google.gwt.animation.client.Animation;

import com.google.gwt.user.client.DOM;

import com.google.gwt.user.client.ui.Widget;

/**

 * @author kman

 *

 */

public class FadeIn extends Animation {

        Widget widget;

        int initialOpacity = 100;

        double currOpacity = 100;

        public FadeIn(Widget aWidget){

                widget = aWidget;

        }

        @Override

        protected void onUpdate(double progress) {

                if(currOpacity > 0.0){

                        progress = 1.0 - progress;

                        currOpacity = initialOpacity * progress;

                        DOM.setStyleAttribute(widget.getElement(), "opacity", ""+new Double(1d - currOpacity / 100d));

                        //required for ie to work

                        //Disabled because IE has bugs rendering non-opaque objects

                        //int opacityToSet = new Double(currOpacity).intValue();

                        //DOM.setStyleAttribute(widget.getElement(), "filter", "alpha(opacity=" + (initialOpacity - opacityToSet) + ")");

                }

        }

}