The Tor Browser: ipc/chromium/src/base/base_drag

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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.

     5 #ifndef BASE_BASE_DRAG_SOURCE_H_

     6 #define BASE_BASE_DRAG_SOURCE_H_

     8 #include <objidl.h>

    10 #include "base/basictypes.h"

    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() { }

    26   // IDropSource implementation:

    27   HRESULT __stdcall QueryContinueDrag(BOOL escape_pressed, DWORD key_state);

    28   HRESULT __stdcall GiveFeedback(DWORD effect);

    30   // IUnknown implementation:

    31   HRESULT __stdcall QueryInterface(const IID& iid, void** object);

    32   ULONG __stdcall AddRef();

    33   ULONG __stdcall Release();

    35  protected:

    36   virtual void OnDragSourceCancel() { }

    37   virtual void OnDragSourceDrop() { }

    38   virtual void OnDragSourceMove() { }

    40  private:

    41   LONG ref_count_;

    43   DISALLOW_EVIL_CONSTRUCTORS(BaseDragSource);

    44 };

    46 #endif  // BASE_BASE_DRAG_SOURCE_H_

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