// Copyright 2018 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef UI_AURA_EXTRA_WINDOW_POSITION_IN_ROOT_MONITOR_H_ #define UI_AURA_EXTRA_WINDOW_POSITION_IN_ROOT_MONITOR_H_ #include #include "base/callback.h" #include "ui/aura/window_observer.h" #include "ui/aura_extra/aura_extra_export.h" namespace aura_extra { // WindowPositionInRootMonitor notifies a callback any time the position of a // window, relative to the root, changes. Changes are only sent when attached // to a valid root. class AURA_EXTRA_EXPORT WindowPositionInRootMonitor : public aura::WindowObserver { public: WindowPositionInRootMonitor(aura::Window* window, base::RepeatingClosure callback); WindowPositionInRootMonitor(const WindowPositionInRootMonitor&) = delete; WindowPositionInRootMonitor& operator=(const WindowPositionInRootMonitor&) = delete; ~WindowPositionInRootMonitor() override; private: // Adds |window| and all its ancestors to |ancestors_|. void AddAncestors(aura::Window* window); // aura::WindowObserver: void OnWindowDestroyed(aura::Window* window) override; void OnWindowParentChanged(aura::Window* window, aura::Window* parent) override; void OnWindowBoundsChanged(aura::Window* window, const gfx::Rect& old_bounds, const gfx::Rect& new_bounds, ui::PropertyChangeReason reason) override; base::RepeatingClosure callback_; // The windows being watched. This contains the window supplied to the // constructor and all it's ancestors. This is empty if the window is deleted. std::vector ancestors_; }; } // namespace aura_extra #endif // UI_AURA_EXTRA_WINDOW_POSITION_IN_ROOT_MONITOR_H_