1 /* 2 * Copyright (C) 2012 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.launcher3; 18 19 import android.graphics.drawable.Drawable; 20 import android.util.FloatProperty; 21 import android.util.Property; 22 import android.view.View; 23 import android.view.ViewGroup.LayoutParams; 24 25 public class LauncherAnimUtils { 26 /** 27 * Durations for various state animations. These are not defined in resources to allow 28 * easier access from static classes and enums 29 */ 30 public static final int ALL_APPS_TRANSITION_MS = 320; 31 public static final int OVERVIEW_TRANSITION_MS = 250; 32 public static final int SPRING_LOADED_TRANSITION_MS = 150; 33 public static final int SPRING_LOADED_EXIT_DELAY = 500; 34 35 // The progress of an animation to all apps must be at least this far along to snap to all apps. 36 public static final float MIN_PROGRESS_TO_ALL_APPS = 0.5f; 37 38 public static final Property<Drawable, Integer> DRAWABLE_ALPHA = 39 new Property<Drawable, Integer>(Integer.TYPE, "drawableAlpha") { 40 @Override 41 public Integer get(Drawable drawable) { 42 return drawable.getAlpha(); 43 } 44 45 @Override 46 public void set(Drawable drawable, Integer alpha) { 47 drawable.setAlpha(alpha); 48 } 49 }; 50 51 public static final FloatProperty<View> SCALE_PROPERTY = 52 new FloatProperty<View>("scale") { 53 @Override 54 public Float get(View view) { 55 return view.getScaleX(); 56 } 57 58 @Override 59 public void setValue(View view, float scale) { 60 view.setScaleX(scale); 61 view.setScaleY(scale); 62 } 63 }; 64 65 /** Increase the duration if we prevented the fling, as we are going against a high velocity. */ blockedFlingDurationFactor(float velocity)66 public static int blockedFlingDurationFactor(float velocity) { 67 return (int) Utilities.boundToRange(Math.abs(velocity) / 2, 2f, 6f); 68 } 69 70 public static final Property<LayoutParams, Integer> LAYOUT_WIDTH = 71 new Property<LayoutParams, Integer>(Integer.TYPE, "width") { 72 @Override 73 public Integer get(LayoutParams lp) { 74 return lp.width; 75 } 76 77 @Override 78 public void set(LayoutParams lp, Integer width) { 79 lp.width = width; 80 } 81 }; 82 83 public static final Property<LayoutParams, Integer> LAYOUT_HEIGHT = 84 new Property<LayoutParams, Integer>(Integer.TYPE, "height") { 85 @Override 86 public Integer get(LayoutParams lp) { 87 return lp.height; 88 } 89 90 @Override 91 public void set(LayoutParams lp, Integer height) { 92 lp.height = height; 93 } 94 }; 95 96 public static final FloatProperty<View> VIEW_TRANSLATE_X = 97 View.TRANSLATION_X instanceof FloatProperty ? (FloatProperty) View.TRANSLATION_X 98 : new FloatProperty<View>("translateX") { 99 @Override 100 public void setValue(View view, float v) { 101 view.setTranslationX(v); 102 } 103 104 @Override 105 public Float get(View view) { 106 return view.getTranslationX(); 107 } 108 }; 109 110 public static final FloatProperty<View> VIEW_TRANSLATE_Y = 111 View.TRANSLATION_Y instanceof FloatProperty ? (FloatProperty) View.TRANSLATION_Y 112 : new FloatProperty<View>("translateY") { 113 @Override 114 public void setValue(View view, float v) { 115 view.setTranslationY(v); 116 } 117 118 @Override 119 public Float get(View view) { 120 return view.getTranslationY(); 121 } 122 }; 123 } 124