Synnefo » Pithos

/*

 *  Copyright (c) 2011 Greek Research and Technology Network

 */

package gr.grnet.pithos.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;

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) + ")");

                }

        }

}