| // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_BASE_DRAG_SOURCE_H__ |
| #define BASE_BASE_DRAG_SOURCE_H__ |
| |
| #include <objidl.h> |
| |
| #include "base/basictypes.h" |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // |
| // BaseDragSource |
| // |
| // A base IDropSource implementation. Handles notifications sent by an active |
| // drag-drop operation as the user mouses over other drop targets on their |
| // system. This object tells Windows whether or not the drag should continue, |
| // and supplies the appropriate cursors. |
| // |
| class BaseDragSource : public IDropSource { |
| public: |
| BaseDragSource(); |
| virtual ~BaseDragSource() { } |
| |
| // IDropSource implementation: |
| HRESULT __stdcall QueryContinueDrag(BOOL escape_pressed, DWORD key_state); |
| HRESULT __stdcall GiveFeedback(DWORD effect); |
| |
| // IUnknown implementation: |
| HRESULT __stdcall QueryInterface(const IID& iid, void** object); |
| ULONG __stdcall AddRef(); |
| ULONG __stdcall Release(); |
| |
| protected: |
| virtual void OnDragSourceCancel() { } |
| virtual void OnDragSourceDrop() { } |
| virtual void OnDragSourceMove() { } |
| |
| private: |
| LONG ref_count_; |
| |
| DISALLOW_EVIL_CONSTRUCTORS(BaseDragSource); |
| }; |
| |
| #endif // #ifndef BASE_DRAG_SOURCE_H__ |
| |