Home | History | Annotate | Download | only in client 
      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_CLIENT_H_
      6 #define UI_AURA_CLIENT_WINDOW_STACKING_CLIENT_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   // Invoked from the various Window stacking functions. Allows the
     19   // WindowStackingClient to alter the source, target and/or direction to stack.
     20   // Returns true if stacking should continue; false if the stacking should not
     21   // happen.
     22   virtual bool AdjustStacking(Window** child,
     23                               Window** target,
     24                               Window::StackDirection* direction) = 0;
     25 
     26  protected:
     27   virtual ~WindowStackingClient() {}
     28 };
     29 
     30 // Sets/gets the WindowStackingClient. This does *not* take ownership of
     31 // |client|. It is assumed the caller will invoke SetWindowStackingClient(NULL)
     32 // before deleting |client|.
     33 AURA_EXPORT void SetWindowStackingClient(WindowStackingClient* client);
     34 AURA_EXPORT WindowStackingClient* GetWindowStackingClient();
     35 
     36 }  // namespace client
     37 }  // namespace aura
     38 
     39 #endif  // UI_AURA_CLIENT_WINDOW_STACKING_CLIENT_H_
     40