BatchStepSensor / src / com.example.android.batchstepsensor / cardstream /

CardStreamAnimator.java

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/*
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* Copyright 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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*     http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.batchstepsensor.cardstream;
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import android.animation.ObjectAnimator;
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import android.content.Context;
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import android.view.View;
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/**
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 * An abstract class which defines animators for CardStreamLinearLayout.
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 */
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abstract class CardStreamAnimator {
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    protected float mSpeedFactor = 1.f;
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    /**
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     * Set speed factor of animations. Higher value means longer duration & slow animation.
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     *
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     * @param speedFactor speed type 1: SLOW, 2: NORMAL, 3:FAST
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     */
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    public void setSpeedFactor(float speedFactor) {
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        mSpeedFactor = speedFactor;
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    }
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    /**
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     * Define initial animation of each child which fired when a user rotate a screen.
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     *
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     * @param context
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     * @return ObjectAnimator for initial animation
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     */
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    public abstract ObjectAnimator getInitalAnimator(Context context);
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    /**
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     * Define disappearing animation of a child which fired when a view is removed programmatically
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     *
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     * @param context
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     * @return ObjectAnimator for disappearing animation
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     */
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    public abstract ObjectAnimator getDisappearingAnimator(Context context);
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    /**
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     * Define appearing animation of a child which fired when a view is added programmatically
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     *
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     * @param context
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     * @return ObjectAnimator for appearing animation
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     */
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    public abstract ObjectAnimator getAppearingAnimator(Context context);
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    /**
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     * Define swipe-in (back to the origin position) animation of a child
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     * which fired when a view is not moved enough to be removed.
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     *
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     * @param view   target view
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     * @param deltaX delta distance by x-axis
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     * @param deltaY delta distance by y-axis
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     * @return ObjectAnimator for swipe-in animation
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     */
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    public abstract ObjectAnimator getSwipeInAnimator(View view, float deltaX, float deltaY);
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    /**
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     * Define swipe-out animation of a child
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     * which fired when a view is removing by a user swipe action.
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     *
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     * @param view   target view
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     * @param deltaX delta distance by x-axis
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     * @param deltaY delta distance by y-axis
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     * @return ObjectAnimator for swipe-out animation
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     */
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    public abstract ObjectAnimator getSwipeOutAnimator(View view, float deltaX, float deltaY);
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    /**
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     * A simple CardStreamAnimator implementation which is used to turn animations off.
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     */
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    public static class EmptyAnimator extends CardStreamAnimator {
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        @Override
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        public ObjectAnimator getInitalAnimator(Context context) {
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            return null;
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        }
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        @Override
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        public ObjectAnimator getDisappearingAnimator(Context context) {
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            return null;
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        }
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        @Override
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        public ObjectAnimator getAppearingAnimator(Context context) {
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            return null;
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        }
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        @Override
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        public ObjectAnimator getSwipeInAnimator(View view, float deltaX, float deltaY) {
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            return null;
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        }
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        @Override
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        public ObjectAnimator getSwipeOutAnimator(View view, float deltaX, float deltaY) {
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            return null;
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        }
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    }
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}
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