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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef CC_LAYERS_VIEWPORT_H_ | 5 #ifndef CC_LAYERS_VIEWPORT_H_ |
| 6 #define CC_LAYERS_VIEWPORT_H_ | 6 #define CC_LAYERS_VIEWPORT_H_ |
| 7 | 7 |
| 8 #include "base/macros.h" |
| 8 #include "base/memory/scoped_ptr.h" | 9 #include "base/memory/scoped_ptr.h" |
| 9 #include "cc/layers/layer_impl.h" | 10 #include "cc/layers/layer_impl.h" |
| 10 #include "ui/gfx/geometry/vector2d_f.h" | 11 #include "ui/gfx/geometry/vector2d_f.h" |
| 11 | 12 |
| 12 namespace cc { | 13 namespace cc { |
| 13 | 14 |
| 14 class LayerTreeHostImpl; | 15 class LayerTreeHostImpl; |
| 15 | 16 |
| 16 // Encapsulates gesture handling logic on the viewport layers. The "viewport" | 17 // Encapsulates gesture handling logic on the viewport layers. The "viewport" |
| 17 // is made up of two scrolling layers, the inner viewport (visual) and the | 18 // is made up of two scrolling layers, the inner viewport (visual) and the |
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| 72 // The pinch zoom anchor point is adjusted by this amount during a pinch. This | 73 // The pinch zoom anchor point is adjusted by this amount during a pinch. This |
| 73 // is used to "snap" a pinch-zoom to the edge of the screen. | 74 // is used to "snap" a pinch-zoom to the edge of the screen. |
| 74 gfx::Vector2d pinch_anchor_adjustment_; | 75 gfx::Vector2d pinch_anchor_adjustment_; |
| 75 | 76 |
| 76 DISALLOW_COPY_AND_ASSIGN(Viewport); | 77 DISALLOW_COPY_AND_ASSIGN(Viewport); |
| 77 }; | 78 }; |
| 78 | 79 |
| 79 } // namespace cc | 80 } // namespace cc |
| 80 | 81 |
| 81 #endif // CC_LAYERS_VIEWPORT_H_ | 82 #endif // CC_LAYERS_VIEWPORT_H_ |
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