aura: Draw shadows around tooltip windows.

ui/aura_shell/image_grid.h

 // Copyright (c) 2011 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 UI_AURA_SHELL_IMAGE_GRID_H_
 #define UI_AURA_SHELL_IMAGE_GRID_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
@@ skipping 60 matching lines @@
     ui::Layer* center_layer() const { return grid_->center_layer_.get(); }
     ui::Layer* right_layer() const { return grid_->right_layer_.get(); }
     ui::Layer* bottom_left_layer() const {
       return grid_->bottom_left_layer_.get();
     }
     ui::Layer* bottom_layer() const { return grid_->bottom_layer_.get(); }
     ui::Layer* bottom_right_layer() const {
       return grid_->bottom_right_layer_.get();
     }
 
+    gfx::Rect top_left_clip_rect() const {
+      return grid_->top_left_painter_->clip_rect_;
+    }
+    gfx::Rect top_right_clip_rect() const {
+      return grid_->top_right_painter_->clip_rect_;
+    }
+    gfx::Rect bottom_left_clip_rect() const {
+      return grid_->bottom_left_painter_->clip_rect_;
+    }
+    gfx::Rect bottom_right_clip_rect() const {
+      return grid_->bottom_right_painter_->clip_rect_;
+    }
+
     // Returns |layer|'s bounds after applying the layer's current transform.
     gfx::Rect GetTransformedLayerBounds(const ui::Layer& layer);
 
    private:
     ImageGrid* grid_;  // not owned
 
     DISALLOW_COPY_AND_ASSIGN(TestAPI);
   };
 
   ImageGrid();
@@ skipping 19 matching lines @@
 
   void SetSize(const gfx::Size& size);
 
  private:
   // Delegate responsible for painting a specific image on a layer.
   class ImagePainter : public ui::LayerDelegate {
    public:
     ImagePainter(const gfx::Image* image) : image_(image) {}
     virtual ~ImagePainter() {}
 
+    // Clips |layer| to |clip_rect|.  Triggers a repaint if the clipping
+    // rectangle has changed.  An empty rectangle disables clipping.
+    void SetClipRect(const gfx::Rect& clip_rect, ui::Layer* layer);
+
     // ui::LayerDelegate implementation:
     virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE;
 
    private:
+    friend class TestAPI;
+
     const gfx::Image* image_;  // not owned
 
+    gfx::Rect clip_rect_;
+
     DISALLOW_COPY_AND_ASSIGN(ImagePainter);
   };
 
   // Returns the dimensions of |image| if non-NULL or gfx::Size(0, 0) otherwise.
   static gfx::Size GetImageSize(const gfx::Image* image);
 
+  // Returns true if |layer|'s bounds don't fit within |size|.
+  static bool LayerExceedsSize(const ui::Layer* layer, const gfx::Size& size);
+
   // Initializes |layer_ptr| and |painter_ptr| to display |image|.
   // Also adds the passed-in layer to |layer_|.
   void InitImage(const gfx::Image* image,
                  scoped_ptr<ui::Layer>* layer_ptr,
                  scoped_ptr<ImagePainter>* painter_ptr);
 
   // Layer that contains all of the image layers.
   scoped_ptr<ui::Layer> layer_;
 
   // The grid's dimensions.
@@ skipping 37 matching lines @@
   scoped_ptr<ImagePainter> bottom_painter_;
   scoped_ptr<ImagePainter> bottom_right_painter_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageGrid);
 };
 
 }  // namespace internal
 }  // namespace aura_shell
 
 #endif  // UI_AURA_SHELL_IMAGE_GRID_H_