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.notification; 18 19 import android.graphics.Color; 20 import android.view.View; 21 import android.widget.ImageView; 22 23 import com.android.internal.util.NotificationColorUtil; 24 import com.android.systemui.R; 25 import com.android.systemui.statusbar.stack.NotificationChildrenContainer; 26 27 /** 28 * A util class for various reusable functions 29 */ 30 public class NotificationUtils { 31 private static final int[] sLocationBase = new int[2]; 32 private static final int[] sLocationOffset = new int[2]; 33 public static boolean isGrayscale(ImageView v, NotificationColorUtil colorUtil) { 34 Object isGrayscale = v.getTag(R.id.icon_is_grayscale); 35 if (isGrayscale != null) { 36 return Boolean.TRUE.equals(isGrayscale); 37 } 38 boolean grayscale = colorUtil.isGrayscaleIcon(v.getDrawable()); 39 v.setTag(R.id.icon_is_grayscale, grayscale); 40 return grayscale; 41 } 42 43 public static float interpolate(float start, float end, float amount) { 44 return start * (1.0f - amount) + end * amount; 45 } 46 47 public static int interpolateColors(int startColor, int endColor, float amount) { 48 return Color.argb( 49 (int) interpolate(Color.alpha(startColor), Color.alpha(endColor), amount), 50 (int) interpolate(Color.red(startColor), Color.red(endColor), amount), 51 (int) interpolate(Color.green(startColor), Color.green(endColor), amount), 52 (int) interpolate(Color.blue(startColor), Color.blue(endColor), amount)); 53 } 54 55 public static float getRelativeYOffset(View offsetView, View baseView) { 56 baseView.getLocationOnScreen(sLocationBase); 57 offsetView.getLocationOnScreen(sLocationOffset); 58 return sLocationOffset[1] - sLocationBase[1]; 59 } 60 } 61
