Move BaseDropTarget and BaseDragSource from base to app/win. Remove the "Base" class name prefix and put in the app::win namespace.

TEST=none
BUG=none
Review URL: http://codereview.chromium.org/3822007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@62900 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 58 insertions, 0 deletions

diff --git a/app/win/drag_source.h b/app/win/drag_source.h
new file mode 100644
index 0000000..75bee86
--- /dev/null
+++ b/app/win/drag_source.h
@@ -0,0 +1,58 @@
+// Copyright (c) 2010 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 APP_WIN_DRAG_SOURCE_H_
+#define APP_WIN_DRAG_SOURCE_H_
+#pragma once
+
+#include <objidl.h>
+
+#include "base/basictypes.h"
+#include "base/ref_counted.h"
+
+namespace app {
+namespace win {
+
+// 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 DragSource : public IDropSource,
+                   public base::RefCountedThreadSafe<DragSource> {
+ public:
+  DragSource();
+  virtual ~DragSource() {}
+
+  // Stop the drag operation at the next chance we get.  This doesn't
+  // synchronously stop the drag (since Windows is controlling that),
+  // but lets us tell Windows to cancel the drag the next chance we get.
+  void CancelDrag() {
+    cancel_drag_ = true;
+  }
+
+  // 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:
+  // Set to true if we want to cancel the drag operation.
+  bool cancel_drag_;
+
+  DISALLOW_COPY_AND_ASSIGN(DragSource);
+};
+
+}  // namespace win
+}  // namespace app
+
+#endif  // APP_WIN_DRAG_SOURCE_H_