AnimationsBuilder.java

/*
 * Copyright 2012 Benjamin Weiss
 * Copyright 2012 Neofonie Mobile GmbH
 *
 * 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 de.neofonie.mobile.app.android.widget.crouton;

import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;

final class AnimationsBuilder {

  private static Animation slideInDownAnimation, slideOutUpAnimation;

  private static final class SlideInDownAnimationParameters {
    private SlideInDownAnimationParameters() {
    }

    public static final float FROM_X_DELTA = 0;
    public static final float TO_X_DELTA = 0;
    public static final float FROM_Y_DELTA = -50;
    public static final float TO_Y_DELTA = 0;

    public static final long DURATION = 400;
  }

  private static final class SlideOutUpAnimationParameters {
    private SlideOutUpAnimationParameters() {
    }

    public static final float FROM_X_DELTA = 0;
    public static final float TO_X_DELTA = 0;
    public static final float FROM_Y_DELTA = 0;
    public static final float TO_Y_DELTA = -50;

    public static final long DURATION = 400;
  }

  private AnimationsBuilder() {
  }

  public static Animation buildSlideInDownAnimation() {
    if (slideInDownAnimation == null) {
      slideInDownAnimation = new TranslateAnimation(SlideInDownAnimationParameters.FROM_X_DELTA, SlideInDownAnimationParameters.TO_X_DELTA,
          SlideInDownAnimationParameters.FROM_Y_DELTA, SlideInDownAnimationParameters.TO_Y_DELTA);
      slideInDownAnimation.setDuration(SlideInDownAnimationParameters.DURATION);
    }

    return slideInDownAnimation;
  }

  public static Animation buildSlideOutUpAnimation() {
    if (slideOutUpAnimation == null) {
      slideOutUpAnimation = new TranslateAnimation(SlideOutUpAnimationParameters.FROM_X_DELTA, SlideOutUpAnimationParameters.TO_X_DELTA,
          SlideOutUpAnimationParameters.FROM_Y_DELTA, SlideOutUpAnimationParameters.TO_Y_DELTA);
      slideOutUpAnimation.setDuration(SlideOutUpAnimationParameters.DURATION);
    }
    return slideOutUpAnimation;
  }
}