| // Copyright (c) 2012 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 ASH_WM_SYSTEM_BACKGROUND_CONTROLLER_H_ |
| #define ASH_WM_SYSTEM_BACKGROUND_CONTROLLER_H_ |
| |
| #include <string> |
| |
| #include "ash/ash_export.h" |
| #include "base/basictypes.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "third_party/skia/include/core/SkColor.h" |
| #include "ui/aura/window_observer.h" |
| |
| namespace ui { |
| class Layer; |
| } |
| |
| namespace ash { |
| |
| // SystemBackgroundController manages a ui::Layer that's stacked at the bottom |
| // of an aura::RootWindow's children. It exists solely to obscure portions of |
| // the root layer that aren't covered by any other layers (e.g. before the |
| // desktop background image is loaded at startup, or when we scale down all of |
| // the other layers as part of a power-button or window-management animation). |
| // It should never be transformed or restacked. |
| class SystemBackgroundController : public aura::WindowObserver { |
| public: |
| SystemBackgroundController(aura::Window* root_window, SkColor color); |
| ~SystemBackgroundController() override; |
| |
| void SetColor(SkColor color); |
| |
| // aura::WindowObserver overrides: |
| void OnWindowBoundsChanged(aura::Window* root, |
| const gfx::Rect& old_bounds, |
| const gfx::Rect& new_bounds) override; |
| |
| private: |
| class HostContentLayerDelegate; |
| |
| aura::Window* root_window_; // not owned |
| |
| scoped_ptr<ui::Layer> layer_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SystemBackgroundController); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_WM_SYSTEM_BACKGROUND_CONTROLLER_H_ |