1 /* 2 * Copyright (C) 2020 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 package com.android.launcher3.anim; 17 18 import androidx.dynamicanimation.animation.SpringForce; 19 20 /** 21 * Utility class to store configurations for spring animation 22 */ 23 public class SpringProperty { 24 25 public static final SpringProperty DEFAULT = new SpringProperty(); 26 27 // Play spring when the animation is going towards the end 28 public static final int FLAG_CAN_SPRING_ON_END = 1 << 0; 29 // Play spring when animation is going towards the start (in reverse direction) 30 public static final int FLAG_CAN_SPRING_ON_START = 1 << 1; 31 32 public final int flags; 33 34 float mDampingRatio = SpringForce.DAMPING_RATIO_MEDIUM_BOUNCY; 35 float mStiffness = SpringForce.STIFFNESS_MEDIUM; 36 SpringProperty()37 public SpringProperty() { 38 this(0); 39 } 40 SpringProperty(int flags)41 public SpringProperty(int flags) { 42 this.flags = flags; 43 } 44 setDampingRatio(float dampingRatio)45 public SpringProperty setDampingRatio(float dampingRatio) { 46 mDampingRatio = dampingRatio; 47 return this; 48 } 49 setStiffness(float stiffness)50 public SpringProperty setStiffness(float stiffness) { 51 mStiffness = stiffness; 52 return this; 53 } 54 } 55