| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #pragma once |
| |
| #include <string> |
| |
| namespace zxdb { |
| |
| class SettingStore; |
| |
| // Interface for listening to changes to a particular SettingStore. |
| // The main use case for this is to listen to the System settings for some |
| // changes (eg. the BuildIDIndex needs to know when a new path has been added |
| // in order to index it). |
| // |
| // Note that an observer listens for a particular setting: |
| // |
| // store.AddObserver(settings::kSomeSetting, this); |
| class SettingStoreObserver { |
| public: |
| // The store is given because an observer could be listening to two stores at |
| // the same time. It's the observer's job to correctly identify the setting |
| // and call the correct getter/setter functions. |
| virtual void OnSettingChanged(const SettingStore&, |
| const std::string& setting_name) = 0; |
| }; |
| |
| } // namespace zxdb |
