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// Copyright (c) 2013 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 CONTENT_BROWSER_WEB_CONTENTS_AURA_SHADOW_LAYER_DELEGATE_H_
#define CONTENT_BROWSER_WEB_CONTENTS_AURA_SHADOW_LAYER_DELEGATE_H_
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "ui/compositor/layer_delegate.h"
namespace aura {
class Window;
}
namespace ui {
class Layer;
}
namespace content {
// ShadowLayerDelegate takes care of drawing a shadow on the left edge of
// another layer.
class ShadowLayerDelegate : public ui::LayerDelegate {
public:
explicit ShadowLayerDelegate(ui::Layer* shadow_for);
~ShadowLayerDelegate() override;
// Returns the layer for the shadow. Note that the ShadowLayerDelegate owns
// the layer, and the layer is destroyed when the delegate is destroyed.
ui::Layer* layer() { return layer_.get(); }
private:
// Overridden from ui::LayerDelegate:
void OnPaintLayer(gfx::Canvas* canvas) override;
void OnDelegatedFrameDamage(const gfx::Rect& damage_rect_in_dip) override;
void OnDeviceScaleFactorChanged(float device_scale_factor) override;
base::Closure PrepareForLayerBoundsChange() override;
scoped_ptr<ui::Layer> layer_;
DISALLOW_COPY_AND_ASSIGN(ShadowLayerDelegate);
};
} // namespace content
#endif // CONTENT_BROWSER_WEB_CONTENTS_AURA_SHADOW_LAYER_DELEGATE_H_
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