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      1 // Copyright (c) 2013 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.
      4 
      5 #ifndef UI_AURA_CLIENT_WINDOW_STACKING_DELEGATE_H_
      6 #define UI_AURA_CLIENT_WINDOW_STACKING_DELEGATE_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/memory/scoped_ptr.h"
     10 #include "ui/aura/aura_export.h"
     11 #include "ui/aura/window.h"
     12 
     13 namespace aura {
     14 namespace client {
     15 
     16 class AURA_EXPORT WindowStackingClient {
     17  public:
     18   virtual ~WindowStackingClient() {}
     19 
     20   // Invoked from the various Window stacking functions. Allows the
     21   // WindowStackingClient to alter the source, target and/or direction to stack.
     22   virtual void AdjustStacking(Window** child,
     23                               Window** target,
     24                               Window::StackDirection* direction) = 0;
     25 };
     26 
     27 // Sets/gets the WindowStackingClient. The setter takes ownership of |client|.
     28 AURA_EXPORT void SetWindowStackingClient(WindowStackingClient* client);
     29 AURA_EXPORT WindowStackingClient* GetWindowStackingClient();
     30 
     31 }  // namespace client
     32 }  // namespace aura
     33 
     34 #endif  // UI_AURA_CLIENT_WINDOW_STACKING_DELEGATE_H_
     35