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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_FOCUS_FOCUS_UTIL_WIN_H_ | 5 #ifndef VIEWS_FOCUS_FOCUS_UTIL_WIN_H_ |
| 6 #define VIEWS_FOCUS_FOCUS_UTIL_WIN_H_ | 6 #define VIEWS_FOCUS_FOCUS_UTIL_WIN_H_ |
| 7 #pragma once | 7 #pragma once |
| 8 | 8 |
| 9 #include <windows.h> | 9 #include <windows.h> |
| 10 | 10 |
| 11 #include "views/views_api.h" | 11 #include "views/views_export.h" |
| 12 | 12 |
| 13 namespace ui { | 13 namespace ui { |
| 14 class ViewProp; | 14 class ViewProp; |
| 15 } | 15 } |
| 16 | 16 |
| 17 namespace views { | 17 namespace views { |
| 18 | 18 |
| 19 // Marks the passed |hwnd| as supporting mouse-wheel message rerouting. | 19 // Marks the passed |hwnd| as supporting mouse-wheel message rerouting. |
| 20 // We reroute the mouse wheel messages to such HWND when they are under the | 20 // We reroute the mouse wheel messages to such HWND when they are under the |
| 21 // mouse pointer (but are not the active window). Callers own the returned | 21 // mouse pointer (but are not the active window). Callers own the returned |
| 22 // object. | 22 // object. |
| 23 VIEWS_API ui::ViewProp* SetWindowSupportsRerouteMouseWheel(HWND hwnd); | 23 VIEWS_EXPORT ui::ViewProp* SetWindowSupportsRerouteMouseWheel(HWND hwnd); |
| 24 | 24 |
| 25 // Forwards mouse wheel messages to the window under it. | 25 // Forwards mouse wheel messages to the window under it. |
| 26 // Windows sends mouse wheel messages to the currently active window. | 26 // Windows sends mouse wheel messages to the currently active window. |
| 27 // This causes a window to scroll even if it is not currently under the mouse | 27 // This causes a window to scroll even if it is not currently under the mouse |
| 28 // wheel. The following code gives mouse wheel messages to the window under the | 28 // wheel. The following code gives mouse wheel messages to the window under the |
| 29 // mouse wheel in order to scroll that window. This is arguably a better user | 29 // mouse wheel in order to scroll that window. This is arguably a better user |
| 30 // experience. The returns value says whether the mouse wheel message was | 30 // experience. The returns value says whether the mouse wheel message was |
| 31 // successfully redirected. | 31 // successfully redirected. |
| 32 VIEWS_API bool RerouteMouseWheel(HWND window, WPARAM w_param, LPARAM l_param); | 32 VIEWS_EXPORT bool RerouteMouseWheel(HWND window, WPARAM w_param, |
| 33 LPARAM l_param); |
| 33 | 34 |
| 34 } // namespace views | 35 } // namespace views |
| 35 | 36 |
| 36 #endif // VIEWS_FOCUS_FOCUS_UTIL_WIN_H_ | 37 #endif // VIEWS_FOCUS_FOCUS_UTIL_WIN_H_ |
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