1 // Copyright (c) 2012 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 ASH_WM_RESIZE_SHADOW_H_ 6 #define ASH_WM_RESIZE_SHADOW_H_ 7 8 #include "base/basictypes.h" 9 #include "base/memory/scoped_ptr.h" 10 11 namespace aura { 12 class Window; 13 } 14 namespace gfx { 15 class Rect; 16 } 17 namespace ui { 18 class Layer; 19 } 20 namespace wm { 21 class ImageGrid; 22 } 23 24 namespace ash { 25 26 // A class to render the resize edge effect when the user moves their mouse 27 // over a sizing edge. This is just a visual effect; the actual resize is 28 // handled by the EventFilter. 29 class ResizeShadow { 30 public: 31 ResizeShadow(); 32 ~ResizeShadow(); 33 34 // Initializes the resize effect layers for a given |window|. 35 void Init(aura::Window* window); 36 37 // Shows resize effects for one or more edges based on a |hit_test| code, such 38 // as HTRIGHT or HTBOTTOMRIGHT. 39 void ShowForHitTest(int hit_test); 40 41 // Hides all resize effects. 42 void Hide(); 43 44 // Updates the effect positions based on the |bounds| of the window. 45 void Layout(const gfx::Rect& bounds); 46 GetLastHitTestForTest()47 int GetLastHitTestForTest() const { 48 return last_hit_test_; 49 } 50 51 private: 52 // Images for the shadow effect. 53 scoped_ptr< ::wm::ImageGrid> image_grid_; 54 55 // Hit test value from last call to ShowForHitTest(). Used to prevent 56 // repeatedly triggering the same animations for the same hit. 57 int last_hit_test_; 58 59 DISALLOW_COPY_AND_ASSIGN(ResizeShadow); 60 }; 61 62 } // namespace ash 63 64 #endif // ASH_WM_RESIZE_SHADOW_H_ 65