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| 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. Use of this | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
| 2 // source code is governed by a BSD-style license that can be found in the | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef VIEWS_CONTROLS_NATIVE_SCROLL_BAR_WRAPPER_H_ | 5 #ifndef VIEWS_CONTROLS_NATIVE_SCROLL_BAR_WRAPPER_H_ |
| 6 #define VIEWS_CONTROLS_NATIVE_SCROLL_BAR_WRAPPER_H_ | 6 #define VIEWS_CONTROLS_NATIVE_SCROLL_BAR_WRAPPER_H_ |
| 7 #pragma once | 7 #pragma once |
| 8 | 8 |
| 9 namespace views { | 9 namespace views { |
| 10 | 10 |
| 11 class NativeScrollBar; | 11 class NativeScrollBar; |
| 12 class View; | 12 class View; |
| 13 | 13 |
| 14 // A specialization of NativeControlWrapper that hosts a platform-native | 14 // A specialization of NativeControlWrapper that hosts a platform-native |
| 15 // scroll bar. | 15 // scroll bar. |
| 16 class NativeScrollBarWrapper { | 16 class NativeScrollBarWrapper { |
| 17 public: | 17 public: |
| 18 virtual ~NativeScrollBarWrapper() {} | 18 virtual ~NativeScrollBarWrapper() {} |
| 19 | 19 |
| 20 // Updates the scroll bar appearance given a viewport size, content size and | 20 // Updates the scroll bar appearance given a viewport size, content size and |
| 21 // current position. | 21 // current position. |
| 22 virtual void Update(int viewport_size, | 22 virtual void Update(int viewport_size, int content_size, int current_pos) = 0; |
| 23 int content_size, | |
| 24 int current_pos) = 0; | |
| 25 | 23 |
| 26 // Retrieves the views::View that hosts the native control. | 24 // Retrieves the views::View that hosts the native control. |
| 27 virtual View* GetView() = 0; | 25 virtual View* GetView() = 0; |
| 28 | 26 |
| 29 // Returns the position of the scrollbar. | 27 // Returns the position of the scrollbar. |
| 30 virtual int GetPosition() const = 0; | 28 virtual int GetPosition() const = 0; |
| 31 | 29 |
| 32 // Creates an appropriate NativeScrollBarWrapper for the platform. | 30 // Creates an appropriate NativeScrollBarWrapper for the platform. |
| 33 static NativeScrollBarWrapper* CreateWrapper(NativeScrollBar* button); | 31 static NativeScrollBarWrapper* CreateWrapper(NativeScrollBar* button); |
| 34 | 32 |
| 35 // Returns the system sizes of vertical/horizontal scroll bars. | 33 // Returns the system sizes of vertical/horizontal scroll bars. |
| 36 static int GetVerticalScrollBarWidth(); | 34 static int GetVerticalScrollBarWidth(); |
| 37 static int GetHorizontalScrollBarHeight(); | 35 static int GetHorizontalScrollBarHeight(); |
| 38 }; | 36 }; |
| 39 | 37 |
| 40 } // namespace views | 38 } // namespace views |
| 41 | 39 |
| 42 #endif // VIEWS_CONTROLS_NATIVE_SCROLL_BAR_WRAPPER_H_ | 40 #endif // VIEWS_CONTROLS_NATIVE_SCROLL_BAR_WRAPPER_H_ |
| 43 | |
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