1 /* 2 * Copyright (C) 2013 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 android.transition; 18 19 import android.util.ArrayMap; 20 import android.view.View; 21 import android.view.ViewGroup; 22 23 import java.util.ArrayList; 24 import java.util.Map; 25 26 /** 27 * Data structure which holds cached values for the transition. 28 * The view field is the target which all of the values pertain to. 29 * The values field is a map which holds information for fields 30 * according to names selected by the transitions. These names should 31 * be unique to avoid clobbering values stored by other transitions, 32 * such as the convention project:transition_name:property_name. For 33 * example, the platform might store a property "alpha" in a transition 34 * "Fader" as "android:fader:alpha". 35 * 36 * <p>These values are cached during the 37 * {@link Transition#captureStartValues(TransitionValues)} 38 * capture} phases of a scene change, once when the start values are captured 39 * and again when the end values are captured. These start/end values are then 40 * passed into the transitions via the 41 * for {@link Transition#createAnimator(ViewGroup, TransitionValues, TransitionValues)} 42 * method.</p> 43 */ 44 public class TransitionValues { 45 46 /** 47 * The View with these values 48 */ 49 public View view; 50 51 /** 52 * The set of values tracked by transitions for this scene 53 */ 54 public final Map<String, Object> values = new ArrayMap<String, Object>(); 55 56 /** 57 * The Transitions that targeted this view. 58 */ 59 final ArrayList<Transition> targetedTransitions = new ArrayList<Transition>(); 60 61 @Override equals(Object other)62 public boolean equals(Object other) { 63 if (other instanceof TransitionValues) { 64 if (view == ((TransitionValues) other).view) { 65 if (values.equals(((TransitionValues) other).values)) { 66 return true; 67 } 68 } 69 } 70 return false; 71 } 72 73 @Override hashCode()74 public int hashCode() { 75 return 31*view.hashCode() + values.hashCode(); 76 } 77 78 @Override toString()79 public String toString() { 80 String returnValue = "TransitionValues@" + Integer.toHexString(hashCode()) + ":\n"; 81 returnValue += " view = " + view + "\n"; 82 returnValue += " values:"; 83 for (String s : values.keySet()) { 84 returnValue += " " + s + ": " + values.get(s) + "\n"; 85 } 86 return returnValue; 87 } 88 }