18b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru/* 28b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * Copyright (C) 2009 The Android Open Source Project 38b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * 48b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * Licensed under the Apache License, Version 2.0 (the "License"); 58b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * you may not use this file except in compliance with the License. 68b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * You may obtain a copy of the License at 78b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * 88b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * http://www.apache.org/licenses/LICENSE-2.0 98b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * 108b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * Unless required by applicable law or agreed to in writing, software 118b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * distributed under the License is distributed on an "AS IS" BASIS, 128b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 138b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * See the License for the specific language governing permissions and 148b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * limitations under the License. 158b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru */ 168b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru 178b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Querupackage android.view.animation; 188b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru 198b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queruimport android.content.Context; 208b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queruimport android.util.AttributeSet; 218b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru 22c8ac775659fd252ce2cc9a61837c170ff70f0a1aJohn Reckimport com.android.internal.view.animation.HasNativeInterpolator; 23c8ac775659fd252ce2cc9a61837c170ff70f0a1aJohn Reckimport com.android.internal.view.animation.NativeInterpolatorFactory; 24c8ac775659fd252ce2cc9a61837c170ff70f0a1aJohn Reckimport com.android.internal.view.animation.NativeInterpolatorFactoryHelper; 25c8ac775659fd252ce2cc9a61837c170ff70f0a1aJohn Reck 268b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru/** 278b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru * An interpolator where the change bounces at the end. 288b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru */ 29c8ac775659fd252ce2cc9a61837c170ff70f0a1aJohn Reck@HasNativeInterpolator 30d422dc358f0100106dc07d7b903201eb9b043b11Yigit Boyarpublic class BounceInterpolator extends BaseInterpolator implements NativeInterpolatorFactory { 318b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru public BounceInterpolator() { 328b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru } 338b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru 348b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru @SuppressWarnings({"UnusedDeclaration"}) 358b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru public BounceInterpolator(Context context, AttributeSet attrs) { 368b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru } 378b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru 388b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru private static float bounce(float t) { 398b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru return t * t * 8.0f; 408b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru } 418b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru 428b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru public float getInterpolation(float t) { 438b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru // _b(t) = t * t * 8 448b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru // bs(t) = _b(t) for t < 0.3535 458b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru // bs(t) = _b(t - 0.54719) + 0.7 for t < 0.7408 468b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru // bs(t) = _b(t - 0.8526) + 0.9 for t < 0.9644 478b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru // bs(t) = _b(t - 1.0435) + 0.95 for t <= 1.0 488b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru // b(t) = bs(t * 1.1226) 498b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru t *= 1.1226f; 508b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru if (t < 0.3535f) return bounce(t); 518b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru else if (t < 0.7408f) return bounce(t - 0.54719f) + 0.7f; 528b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru else if (t < 0.9644f) return bounce(t - 0.8526f) + 0.9f; 538b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru else return bounce(t - 1.0435f) + 0.95f; 548b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru } 55c8ac775659fd252ce2cc9a61837c170ff70f0a1aJohn Reck 56c8ac775659fd252ce2cc9a61837c170ff70f0a1aJohn Reck /** @hide */ 57c8ac775659fd252ce2cc9a61837c170ff70f0a1aJohn Reck @Override 58c8ac775659fd252ce2cc9a61837c170ff70f0a1aJohn Reck public long createNativeInterpolator() { 59c8ac775659fd252ce2cc9a61837c170ff70f0a1aJohn Reck return NativeInterpolatorFactoryHelper.createBounceInterpolator(); 60c8ac775659fd252ce2cc9a61837c170ff70f0a1aJohn Reck } 618b0662878eae69ab62e859b07165f086ea65cad5Jean-Baptiste Queru}