Home | History | Annotate | Download | only in aura 
      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_BROWSER_WEB_CONTENTS_AURA_SHADOW_LAYER_DELEGATE_H_
      6 #define CONTENT_BROWSER_WEB_CONTENTS_AURA_SHADOW_LAYER_DELEGATE_H_
      7 
      8 #include "base/compiler_specific.h"
      9 #include "base/memory/scoped_ptr.h"
     10 #include "ui/compositor/layer_delegate.h"
     11 
     12 namespace aura {
     13 class Window;
     14 }
     15 
     16 namespace ui {
     17 class Layer;
     18 }
     19 
     20 namespace content {
     21 
     22 // ShadowLayerDelegate takes care of drawing a shadow on the left edge of
     23 // another layer.
     24 class ShadowLayerDelegate : public ui::LayerDelegate {
     25  public:
     26   explicit ShadowLayerDelegate(ui::Layer* shadow_for);
     27   virtual ~ShadowLayerDelegate();
     28 
     29   // Returns the layer for the shadow. Note that the ShadowLayerDelegate owns
     30   // the layer, and the layer is destroyed when the delegate is destroyed.
     31   ui::Layer* layer() { return layer_.get(); }
     32 
     33  private:
     34   // Overridden from ui::LayerDelegate:
     35   virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE;
     36   virtual void OnDelegatedFrameDamage(
     37       const gfx::Rect& damage_rect_in_dip) OVERRIDE;
     38   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
     39   virtual base::Closure PrepareForLayerBoundsChange() OVERRIDE;
     40 
     41   scoped_ptr<ui::Layer> layer_;
     42 
     43   DISALLOW_COPY_AND_ASSIGN(ShadowLayerDelegate);
     44 };
     45 
     46 }  // namespace content
     47 
     48 #endif  //  CONTENT_BROWSER_WEB_CONTENTS_AURA_SHADOW_LAYER_DELEGATE_H_
     49