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// 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_
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