1 /* 2 * Copyright (c) 2023 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 #ifndef OHOS_ROSEN_WINDOW_SCENE_SCREEN_SETTING_HELPER_H 16 #define OHOS_ROSEN_WINDOW_SCENE_SCREEN_SETTING_HELPER_H 17 18 #include <cstdint> 19 #include <string> 20 21 #include "setting_observer.h" 22 23 namespace OHOS { 24 namespace Rosen { 25 class ScreenSettingHelper { 26 public: 27 static void RegisterSettingDpiObserver(SettingObserver::UpdateFunc func); 28 static void UnregisterSettingDpiObserver(); 29 static bool GetSettingDpi(uint32_t& dpi, const std::string& key = SETTING_DPI_KEY); 30 31 private: 32 static const constexpr char* SETTING_DPI_KEY {"user_set_dpi_value"}; 33 static sptr<SettingObserver> dpiObserver_; 34 }; 35 } // namespace Rosen 36 } // namespace OHOS 37 38 #endif // OHOS_ROSEN_WINDOW_SCENE_SCREEN_SETTING_HELPER_H