license.bot | f003cfe | 2008-08-24 09:55:55 +0900 | [diff] [blame^] | 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. |
initial.commit | 3f4a732 | 2008-07-27 06:49:38 +0900 | [diff] [blame] | 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 // #ifndef BASE_DRAG_SOURCE_H__ |
license.bot | f003cfe | 2008-08-24 09:55:55 +0900 | [diff] [blame^] | 47 | |