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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 VIEWS_CONTROLS_SCROLLBAR_SCROLLBAR_H_ | 5 #ifndef VIEWS_CONTROLS_SCROLLBAR_SCROLLBAR_H_ |
| 6 #define VIEWS_CONTROLS_SCROLLBAR_SCROLLBAR_H_ | 6 #define VIEWS_CONTROLS_SCROLLBAR_SCROLLBAR_H_ |
| 7 #pragma once | 7 #pragma once |
| 8 | 8 |
| 9 #include "views/events/event.h" | 9 #include "views/events/event.h" |
| 10 #include "views/view.h" | 10 #include "views/view.h" |
| 11 | 11 |
| 12 namespace views { | 12 namespace views { |
| 13 | 13 |
| 14 class ScrollBar; | 14 class ScrollBar; |
| 15 | 15 |
| 16 ///////////////////////////////////////////////////////////////////////////// | 16 ///////////////////////////////////////////////////////////////////////////// |
| 17 // | 17 // |
| 18 // ScrollBarController | 18 // ScrollBarController |
| 19 // | 19 // |
| 20 // ScrollBarController defines the method that should be implemented to | 20 // ScrollBarController defines the method that should be implemented to |
| 21 // receive notification from a scrollbar | 21 // receive notification from a scrollbar |
| 22 // | 22 // |
| 23 ///////////////////////////////////////////////////////////////////////////// | 23 ///////////////////////////////////////////////////////////////////////////// |
| 24 class VIEWS_API ScrollBarController { | 24 class VIEWS_EXPORT ScrollBarController { |
| 25 public: | 25 public: |
| 26 | 26 |
| 27 // Invoked by the scrollbar when the scrolling position changes | 27 // Invoked by the scrollbar when the scrolling position changes |
| 28 // This method typically implements the actual scrolling. | 28 // This method typically implements the actual scrolling. |
| 29 // | 29 // |
| 30 // The provided position is expressed in pixels. It is the new X or Y | 30 // The provided position is expressed in pixels. It is the new X or Y |
| 31 // position which is in the GetMinPosition() / GetMaxPosition range. | 31 // position which is in the GetMinPosition() / GetMaxPosition range. |
| 32 virtual void ScrollToPosition(ScrollBar* source, int position) = 0; | 32 virtual void ScrollToPosition(ScrollBar* source, int position) = 0; |
| 33 | 33 |
| 34 // Returns the amount to scroll. The amount to scroll may be requested in | 34 // Returns the amount to scroll. The amount to scroll may be requested in |
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| 48 ///////////////////////////////////////////////////////////////////////////// | 48 ///////////////////////////////////////////////////////////////////////////// |
| 49 // | 49 // |
| 50 // ScrollBar | 50 // ScrollBar |
| 51 // | 51 // |
| 52 // A View subclass to wrap to implement a ScrollBar. Our current windows | 52 // A View subclass to wrap to implement a ScrollBar. Our current windows |
| 53 // version simply wraps a native windows scrollbar. | 53 // version simply wraps a native windows scrollbar. |
| 54 // | 54 // |
| 55 // A scrollbar is either horizontal or vertical | 55 // A scrollbar is either horizontal or vertical |
| 56 // | 56 // |
| 57 ///////////////////////////////////////////////////////////////////////////// | 57 ///////////////////////////////////////////////////////////////////////////// |
| 58 class VIEWS_API ScrollBar : public View { | 58 class VIEWS_EXPORT ScrollBar : public View { |
| 59 public: | 59 public: |
| 60 virtual ~ScrollBar(); | 60 virtual ~ScrollBar(); |
| 61 | 61 |
| 62 // Overridden from View: | 62 // Overridden from View: |
| 63 virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE; | 63 virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE; |
| 64 | 64 |
| 65 // Return whether this scrollbar is horizontal | 65 // Return whether this scrollbar is horizontal |
| 66 bool IsHorizontal() const; | 66 bool IsHorizontal() const; |
| 67 | 67 |
| 68 // Set / Get the controller | 68 // Set / Get the controller |
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| 98 ScrollBarController* controller_; | 98 ScrollBarController* controller_; |
| 99 | 99 |
| 100 // properties | 100 // properties |
| 101 int max_pos_; | 101 int max_pos_; |
| 102 }; | 102 }; |
| 103 | 103 |
| 104 } // namespace views | 104 } // namespace views |
| 105 | 105 |
| 106 #endif // VIEWS_CONTROLS_SCROLLBAR_SCROLLBAR_H_ | 106 #endif // VIEWS_CONTROLS_SCROLLBAR_SCROLLBAR_H_ |
| 107 | 107 |
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