| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License |
| */ |
| |
| package com.android.systemui.statusbar.stack; |
| |
| import android.graphics.Path; |
| import android.view.animation.PathInterpolator; |
| |
| /** |
| * An interpolator specifically designed for the appear animation of heads up notifications. |
| */ |
| public class HeadsUpAppearInterpolator extends PathInterpolator { |
| public HeadsUpAppearInterpolator() { |
| super(getAppearPath()); |
| } |
| |
| private static Path getAppearPath() { |
| Path path = new Path(); |
| path.moveTo(0, 0); |
| float x1 = 250f; |
| float x2 = 150f; |
| float x3 = 100f; |
| float y1 = 90f; |
| float y2 = 78f; |
| float y3 = 80f; |
| float xTot = (x1 + x2 + x3); |
| path.cubicTo(x1 * 0.9f / xTot, 0f, |
| x1 * 0.8f / xTot, y1 / y3, |
| x1 / xTot , y1 / y3); |
| path.cubicTo((x1 + x2 * 0.4f) / xTot, y1 / y3, |
| (x1 + x2 * 0.2f) / xTot, y2 / y3, |
| (x1 + x2) / xTot, y2 / y3); |
| path.cubicTo((x1 + x2 + x3 * 0.4f) / xTot, y2 / y3, |
| (x1 + x2 + x3 * 0.2f) / xTot, 1f, |
| 1f, 1f); |
| return path; |
| } |
| } |