1 /* 2 * Copyright (C) 2013 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.colorpicker; 18 19 import android.graphics.Color; 20 21 import java.util.Comparator; 22 23 /** 24 * A color comparator which compares based on hue, saturation, and value. 25 */ 26 public class HsvColorComparator implements Comparator<Integer> { 27 28 @Override 29 public int compare(Integer lhs, Integer rhs) { 30 float[] hsv = new float[3]; 31 Color.colorToHSV(lhs, hsv); 32 float hue1 = hsv[0]; 33 float sat1 = hsv[1]; 34 float val1 = hsv[2]; 35 36 float[] hsv2 = new float[3]; 37 Color.colorToHSV(rhs, hsv2); 38 float hue2 = hsv2[0]; 39 float sat2 = hsv2[1]; 40 float val2 = hsv2[2]; 41 42 if (hue1 < hue2) { 43 return 1; 44 } else if (hue1 > hue2) { 45 return -1; 46 } else { 47 if (sat1 < sat2) { 48 return 1; 49 } else if (sat1 > sat2) { 50 return -1; 51 } else { 52 if (val1 < val2) { 53 return 1; 54 } else if (val1 > val2) { 55 return -1; 56 } 57 } 58 } 59 return 0; 60 } 61 } 62
