1/* 2 * Copyright (C) 2016 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 17package android.support.transition; 18 19import android.view.View; 20 21import java.util.HashMap; 22import java.util.Map; 23 24/** 25 * Data structure which holds cached values for the transition. 26 * The view field is the target which all of the values pertain to. 27 * The values field is a map which holds information for fields 28 * according to names selected by the transitions. These names should 29 * be unique to avoid clobbering values stored by other transitions, 30 * such as the convention project:transition_name:property_name. For 31 * example, the platform might store a property "alpha" in a transition 32 * "Fader" as "android:fader:alpha". 33 * 34 * <p>These values are cached during the 35 * {@link android.support.transition.Transition#captureStartValues(TransitionValues)} 36 * capture} phases of a scene change, once when the start values are captured 37 * and again when the end values are captured. These start/end values are then 38 * passed into the transitions via the 39 * for {@link android.support.transition.Transition#createAnimator(android.view.ViewGroup, 40 * TransitionValues, TransitionValues)} method.</p> 41 */ 42public class TransitionValues { 43 44 /** 45 * The set of values tracked by transitions for this scene 46 */ 47 public final Map<String, Object> values = new HashMap<>(); 48 49 /** 50 * The View with these values 51 */ 52 public View view; 53 54 @Override 55 public boolean equals(Object other) { 56 if (other instanceof TransitionValues) { 57 if (view == ((TransitionValues) other).view) { 58 if (values.equals(((TransitionValues) other).values)) { 59 return true; 60 } 61 } 62 } 63 return false; 64 } 65 66 @Override 67 public int hashCode() { 68 return 31 * view.hashCode() + values.hashCode(); 69 } 70 71 @Override 72 public String toString() { 73 String returnValue = "TransitionValues@" + Integer.toHexString(hashCode()) + ":\n"; 74 returnValue += " view = " + view + "\n"; 75 returnValue += " values:"; 76 for (String s : values.keySet()) { 77 returnValue += " " + s + ": " + values.get(s) + "\n"; 78 } 79 return returnValue; 80 } 81 82} 83