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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to you 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.apache.pivot.wtk.effects;

import org.apache.pivot.wtk.Component;

/**
 * Fade transition class.
 */
public class FadeTransition extends Transition {
    private Component component;
    private FadeDecorator fadeDecorator = new FadeDecorator();

    public FadeTransition(Component component, int duration, int rate) {
        super(duration, rate, false);
        this.component = component;
    }

    public Component getComponent() {
        return component;
    }

    @Override
    public void start(TransitionListener transitionListener) {
        component.getDecorators().add(fadeDecorator);

        super.start(transitionListener);
    }

    @Override
    public void stop() {
        component.getDecorators().remove(fadeDecorator);

        super.stop();
    }

    @Override
    protected void update() {
        fadeDecorator.setOpacity(1.0f - getPercentComplete());
        component.repaint();
    }
}