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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 UI_BASE_DRAGDROP_DRAG_SOURCE_H_ | 5 #ifndef UI_BASE_DRAGDROP_DRAG_SOURCE_H_ |
6 #define UI_BASE_DRAGDROP_DRAG_SOURCE_H_ | 6 #define UI_BASE_DRAGDROP_DRAG_SOURCE_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include <objidl.h> | 9 #include <objidl.h> |
10 | 10 |
11 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
12 #include "base/memory/ref_counted.h" | 12 #include "base/memory/ref_counted.h" |
13 #include "ui/ui_api.h" | 13 #include "ui/base/ui_export.h" |
14 | 14 |
15 namespace ui { | 15 namespace ui { |
16 | 16 |
17 // A base IDropSource implementation. Handles notifications sent by an active | 17 // A base IDropSource implementation. Handles notifications sent by an active |
18 // drag-drop operation as the user mouses over other drop targets on their | 18 // drag-drop operation as the user mouses over other drop targets on their |
19 // system. This object tells Windows whether or not the drag should continue, | 19 // system. This object tells Windows whether or not the drag should continue, |
20 // and supplies the appropriate cursors. | 20 // and supplies the appropriate cursors. |
21 class UI_API DragSource : public IDropSource, | 21 class UI_EXPORT DragSource : public IDropSource, |
22 public base::RefCountedThreadSafe<DragSource> { | 22 public base::RefCountedThreadSafe<DragSource> { |
23 public: | 23 public: |
24 DragSource(); | 24 DragSource(); |
25 virtual ~DragSource() {} | 25 virtual ~DragSource() {} |
26 | 26 |
27 // Stop the drag operation at the next chance we get. This doesn't | 27 // Stop the drag operation at the next chance we get. This doesn't |
28 // synchronously stop the drag (since Windows is controlling that), | 28 // synchronously stop the drag (since Windows is controlling that), |
29 // but lets us tell Windows to cancel the drag the next chance we get. | 29 // but lets us tell Windows to cancel the drag the next chance we get. |
30 void CancelDrag() { | 30 void CancelDrag() { |
31 cancel_drag_ = true; | 31 cancel_drag_ = true; |
32 } | 32 } |
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48 private: | 48 private: |
49 // Set to true if we want to cancel the drag operation. | 49 // Set to true if we want to cancel the drag operation. |
50 bool cancel_drag_; | 50 bool cancel_drag_; |
51 | 51 |
52 DISALLOW_COPY_AND_ASSIGN(DragSource); | 52 DISALLOW_COPY_AND_ASSIGN(DragSource); |
53 }; | 53 }; |
54 | 54 |
55 } // namespace ui | 55 } // namespace ui |
56 | 56 |
57 #endif // UI_BASE_DRAGDROP_DRAG_SOURCE_H_ | 57 #endif // UI_BASE_DRAGDROP_DRAG_SOURCE_H_ |
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