1 /* 2 * Copyright (C) 2015 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.systemui.statusbar.stack; 18 19 import android.graphics.Path; 20 import android.view.animation.PathInterpolator; 21 22 /** 23 * An interpolator specifically designed for the appear animation of heads up notifications. 24 */ 25 public class HeadsUpAppearInterpolator extends PathInterpolator { 26 public HeadsUpAppearInterpolator() { 27 super(getAppearPath()); 28 } 29 30 private static Path getAppearPath() { 31 Path path = new Path(); 32 path.moveTo(0, 0); 33 float x1 = 250f; 34 float x2 = 150f; 35 float x3 = 100f; 36 float y1 = 90f; 37 float y2 = 78f; 38 float y3 = 80f; 39 float xTot = (x1 + x2 + x3); 40 path.cubicTo(x1 * 0.9f / xTot, 0f, 41 x1 * 0.8f / xTot, y1 / y3, 42 x1 / xTot , y1 / y3); 43 path.cubicTo((x1 + x2 * 0.4f) / xTot, y1 / y3, 44 (x1 + x2 * 0.2f) / xTot, y2 / y3, 45 (x1 + x2) / xTot, y2 / y3); 46 path.cubicTo((x1 + x2 + x3 * 0.4f) / xTot, y2 / y3, 47 (x1 + x2 + x3 * 0.2f) / xTot, 1f, 48 1f, 1f); 49 return path; 50 } 51 } 52
