| // 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_RESIZE_SHADOW_CONTROLLER_H_ |
| #define ASH_WM_RESIZE_SHADOW_CONTROLLER_H_ |
| |
| #include <map> |
| |
| #include "ash/ash_export.h" |
| #include "base/basictypes.h" |
| #include "base/compiler_specific.h" |
| #include "base/memory/linked_ptr.h" |
| #include "ui/aura/window_observer.h" |
| |
| namespace aura { |
| class Window; |
| } |
| |
| namespace ash { |
| class ResizeShadow; |
| |
| // ResizeShadowController observes changes to resizable windows and shows |
| // a resize handle visual effect when the cursor is near the edges. |
| class ASH_EXPORT ResizeShadowController : public aura::WindowObserver { |
| public: |
| ResizeShadowController(); |
| virtual ~ResizeShadowController(); |
| |
| // Shows the appropriate shadow for a given |window| and |hit_test| location. |
| void ShowShadow(aura::Window* window, int hit_test); |
| |
| // Hides the shadow for a |window|, if it has one. |
| void HideShadow(aura::Window* window); |
| |
| ResizeShadow* GetShadowForWindowForTest(aura::Window* window); |
| |
| // aura::WindowObserver overrides: |
| virtual void OnWindowBoundsChanged( |
| aura::Window* window, |
| const gfx::Rect& old_bounds, |
| const gfx::Rect& new_bounds) override; |
| virtual void OnWindowDestroyed(aura::Window* window) override; |
| |
| private: |
| typedef std::map<aura::Window*, linked_ptr<ResizeShadow> > WindowShadowMap; |
| |
| // Creates a shadow for a given window and returns it. |window_shadows_| |
| // owns the memory. |
| ResizeShadow* CreateShadow(aura::Window* window); |
| |
| // Returns the resize shadow for |window| or NULL if no shadow exists. |
| ResizeShadow* GetShadowForWindow(aura::Window* window); |
| |
| WindowShadowMap window_shadows_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ResizeShadowController); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_WM_RESIZE_SHADOW_CONTROLLER_H_ |