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 17 package com.android.launcher3.util; 18 19 import android.annotation.TargetApi; 20 import android.os.Build; 21 22 @TargetApi(Build.VERSION_CODES.LOLLIPOP) 23 public class CircleRevealOutlineProvider extends RevealOutlineAnimation { 24 25 private int mCenterX; 26 private int mCenterY; 27 private float mRadius0; 28 private float mRadius1; 29 30 /** 31 * @param x reveal center x 32 * @param y reveal center y 33 * @param r0 initial radius 34 * @param r1 final radius 35 */ CircleRevealOutlineProvider(int x, int y, float r0, float r1)36 public CircleRevealOutlineProvider(int x, int y, float r0, float r1) { 37 mCenterX = x; 38 mCenterY = y; 39 mRadius0 = r0; 40 mRadius1 = r1; 41 } 42 43 @Override shouldRemoveElevationDuringAnimation()44 public boolean shouldRemoveElevationDuringAnimation() { 45 return true; 46 } 47 48 @Override setProgress(float progress)49 public void setProgress(float progress) { 50 mOutlineRadius = (1 - progress) * mRadius0 + progress * mRadius1; 51 52 mOutline.left = (int) (mCenterX - mOutlineRadius); 53 mOutline.top = (int) (mCenterY - mOutlineRadius); 54 mOutline.right = (int) (mCenterX + mOutlineRadius); 55 mOutline.bottom = (int) (mCenterY + mOutlineRadius); 56 } 57 } 58