Add base to the repository.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@8 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 71 insertions, 0 deletions

diff --git a/base/base_drag_source.h b/base/base_drag_source.h
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+++ b/base/base_drag_source.h
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#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__