FadeOutAnimation.java

/*
 * Copyright 2012 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.overlord.dtgov.ui.client.local.animations;


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

/**
 * GWT animation used to fade out a widget.
 *
 * @author eric.wittmann@redhat.com
 */
public class FadeOutAnimation extends AbstractAnimation {

    /**
     * Constructor.
     * @param targetWidget
     */
    public FadeOutAnimation(Widget targetWidget) {
        super(targetWidget);
    }

    /**
     * @see com.google.gwt.animation.client.Animation#onUpdate(double)
     */
    @Override
    protected void onUpdate(double progress) {
        double cssOpacity = 1.0 - progress;
        getTargetWidget().getElement().getStyle().setOpacity(cssOpacity);
    }

    /**
     * @see org.overlord.sramp.ui.client.animation.AbstractAnimation#doOnCancel()
     */
    @Override
    protected void doOnCancel() {
        getTargetWidget().getElement().getStyle().setOpacity(1.0);
    }

}