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comparison: ipc/chromium/src/base/base_drag_source.h
ipc/chromium/src/base/base_drag_source.h
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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef BASE_BASE_DRAG_SOURCE_H_ | |
| 6 #define BASE_BASE_DRAG_SOURCE_H_ | |
| 7 | |
| 8 #include <objidl.h> | |
| 9 | |
| 10 #include "base/basictypes.h" | |
| 11 | |
| 12 /////////////////////////////////////////////////////////////////////////////// | |
| 13 // | |
| 14 // BaseDragSource | |
| 15 // | |
| 16 // A base IDropSource implementation. Handles notifications sent by an active | |
| 17 // drag-drop operation as the user mouses over other drop targets on their | |
| 18 // system. This object tells Windows whether or not the drag should continue, | |
| 19 // and supplies the appropriate cursors. | |
| 20 // | |
| 21 class BaseDragSource : public IDropSource { | |
| 22 public: | |
| 23 BaseDragSource(); | |
| 24 virtual ~BaseDragSource() { } | |
| 25 | |
| 26 // IDropSource implementation: | |
| 27 HRESULT __stdcall QueryContinueDrag(BOOL escape_pressed, DWORD key_state); | |
| 28 HRESULT __stdcall GiveFeedback(DWORD effect); | |
| 29 | |
| 30 // IUnknown implementation: | |
| 31 HRESULT __stdcall QueryInterface(const IID& iid, void** object); | |
| 32 ULONG __stdcall AddRef(); | |
| 33 ULONG __stdcall Release(); | |
| 34 | |
| 35 protected: | |
| 36 virtual void OnDragSourceCancel() { } | |
| 37 virtual void OnDragSourceDrop() { } | |
| 38 virtual void OnDragSourceMove() { } | |
| 39 | |
| 40 private: | |
| 41 LONG ref_count_; | |
| 42 | |
| 43 DISALLOW_EVIL_CONSTRUCTORS(BaseDragSource); | |
| 44 }; | |
| 45 | |
| 46 #endif // BASE_BASE_DRAG_SOURCE_H_ |
