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.tv.guide; 18 19 import java.util.concurrent.TimeUnit; 20 21 public class GuideUtils { 22 private static int sWidthPerHour = 0; 23 24 /** 25 * Sets the width in pixels that corresponds to an hour in program guide. 26 * Assume that this is called from main thread only, so, no synchronization. 27 */ 28 public static void setWidthPerHour(int widthPerHour) { 29 sWidthPerHour = widthPerHour; 30 } 31 32 /** 33 * Gets the number of pixels in program guide table that corresponds to the given milliseconds. 34 */ 35 public static int convertMillisToPixel(long millis) { 36 return (int) (millis * sWidthPerHour / TimeUnit.HOURS.toMillis(1)); 37 } 38 39 /** 40 * Gets the number of pixels in program guide table that corresponds to the given range. 41 */ 42 public static int convertMillisToPixel(long startMillis, long endMillis) { 43 // Convert to pixels first to avoid accumulation of rounding errors. 44 return GuideUtils.convertMillisToPixel(endMillis) 45 - GuideUtils.convertMillisToPixel(startMillis); 46 } 47 48 /** 49 * Gets the time in millis that corresponds to the given pixels in the program guide. 50 */ 51 public static long convertPixelToMillis(int pixel) { 52 return pixel * TimeUnit.HOURS.toMillis(1) / sWidthPerHour; 53 } 54 55 private GuideUtils() { } 56 } 57
