AnimatorAnimationFactory.java

/*
 * Copyright 2014 Alex Curran
 *
 * 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 com.github.amlcurran.showcaseview;

import android.animation.Animator;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.graphics.Point;
import android.view.View;
import android.view.animation.AccelerateDecelerateInterpolator;

class AnimatorAnimationFactory implements AnimationFactory {

    private static final String ALPHA = "alpha";
    private static final float INVISIBLE = 0f;
    private static final float VISIBLE = 1f;

    private final AccelerateDecelerateInterpolator interpolator;

    public AnimatorAnimationFactory() {
        interpolator = new AccelerateDecelerateInterpolator();
    }

    @Override
    public void fadeInView(View target, long duration, final AnimationStartListener listener) {
        ObjectAnimator oa = ObjectAnimator.ofFloat(target, ALPHA, INVISIBLE, VISIBLE);
        oa.setDuration(duration).addListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animator) {
                listener.onAnimationStart();
            }

            @Override
            public void onAnimationEnd(Animator animator) {
            }

            @Override
            public void onAnimationCancel(Animator animator) {
            }

            @Override
            public void onAnimationRepeat(Animator animator) {
            }
        });
        oa.start();
    }

    @Override
    public void fadeOutView(View target, long duration, final AnimationEndListener listener) {
        ObjectAnimator oa = ObjectAnimator.ofFloat(target, ALPHA, INVISIBLE);
        oa.setDuration(duration).addListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animator) {
            }

            @Override
            public void onAnimationEnd(Animator animator) {
                listener.onAnimationEnd();
            }

            @Override
            public void onAnimationCancel(Animator animator) {
            }

            @Override
            public void onAnimationRepeat(Animator animator) {
            }
        });
        oa.start();
    }

    @Override
    public void animateTargetToPoint(ShowcaseView showcaseView, Point point) {
        AnimatorSet set = new AnimatorSet();
        ObjectAnimator xAnimator = ObjectAnimator.ofInt(showcaseView, "showcaseX", point.x);
        ObjectAnimator yAnimator = ObjectAnimator.ofInt(showcaseView, "showcaseY", point.y);
        set.playTogether(xAnimator, yAnimator);
        set.setInterpolator(interpolator);
        set.start();
    }

}