1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License 15 */ 16 17 package com.android.settingslib.animation; 18 19 import android.content.Context; 20 import android.view.animation.AnimationUtils; 21 import android.view.animation.Interpolator; 22 23 /** 24 * A class to make nice disappear transitions for views in a tabular layout. 25 */ 26 public class DisappearAnimationUtils extends AppearAnimationUtils { 27 28 public DisappearAnimationUtils(Context ctx) { 29 this(ctx, DEFAULT_APPEAR_DURATION, 30 1.0f, 1.0f, 31 AnimationUtils.loadInterpolator(ctx, android.R.interpolator.fast_out_linear_in)); 32 } 33 34 public DisappearAnimationUtils(Context ctx, long duration, float translationScaleFactor, 35 float delayScaleFactor, Interpolator interpolator) { 36 this(ctx, duration, translationScaleFactor, delayScaleFactor, interpolator, 37 ROW_TRANSLATION_SCALER); 38 } 39 40 public DisappearAnimationUtils(Context ctx, long duration, float translationScaleFactor, 41 float delayScaleFactor, Interpolator interpolator, RowTranslationScaler rowScaler) { 42 super(ctx, duration, translationScaleFactor, delayScaleFactor, interpolator); 43 mRowTranslationScaler = rowScaler; 44 mAppearing = false; 45 } 46 47 protected long calculateDelay(int row, int col) { 48 return (long) ((row * 60 + col * (Math.pow(row, 0.4) + 0.4) * 10) * mDelayScale); 49 } 50 51 private static final RowTranslationScaler ROW_TRANSLATION_SCALER = new RowTranslationScaler() { 52 53 @Override 54 public float getRowTranslationScale(int row, int numRows) { 55 return (float) (Math.pow((numRows - row), 2) / numRows); 56 } 57 }; 58 } 59
