1/* 2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16/** 17 * @file 18 * @kit BasicServicesKit 19 */ 20 21import { BusinessError } from './@ohos.base'; 22 23/** 24 * Provides interfaces to control the power of display. 25 * 26 * @namespace brightness 27 * @syscap SystemCapability.PowerManager.DisplayPowerManager 28 * @systemapi 29 * @since 7 30 */ 31declare namespace brightness { 32 /** 33 * Sets the screen brightness. 34 * 35 * @param { number } value Brightness value, ranging from 0 to 255. 36 * value parameter must be of type number. 37 * @throws { BusinessError } 202 - Permission verification failed. A non-system application calls a system API. 38 * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified; 39 * 2. Incorrect parameter types; 40 * @throws { BusinessError } 4700101 - Failed to connect to the service. 41 * @syscap SystemCapability.PowerManager.DisplayPowerManager 42 * @systemapi 43 * @since 7 44 */ 45 function setValue(value: number): void; 46 47 /** 48 * Sets the screen brightness. 49 * 50 * @param { number } value - Brightness value, ranging from 0 to 255. 51 * value parameter must be of type number. 52 * @param { boolean } continuous - This parameter is used in the scenario of continuous adjustment to the brightness. 53 * You are advised to set this parameter to true during the continuous adjustment and 54 * to false at the end of the continuous adjustment for better performance. 55 * continuous parameter must be of type boolean. 56 * @throws { BusinessError } 202 - Permission verification failed. A non-system application calls a system API. 57 * @throws { BusinessError } 401 - Parameter error. Possible causes: 1.Mandatory parameters are left unspecified; 58 * 2. Incorrect parameter types; 59 * @throws { BusinessError } 4700101 - Failed to connect to the service. 60 * @syscap SystemCapability.PowerManager.DisplayPowerManager 61 * @systemapi 62 * @since 11 63 */ 64 function setValue(value: number, continuous: boolean): void; 65} 66export default brightness; 67