// Copyright (c) 2013 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 UI_AURA_CLIENT_WINDOW_STACKING_CLIENT_H_
#define UI_AURA_CLIENT_WINDOW_STACKING_CLIENT_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "ui/aura/aura_export.h"
#include "ui/aura/window.h"
namespace aura {
namespace client {
class AURA_EXPORT WindowStackingClient {
public:
// Invoked from the various Window stacking functions. Allows the
// WindowStackingClient to alter the source, target and/or direction to stack.
// Returns true if stacking should continue; false if the stacking should not
// happen.
virtual bool AdjustStacking(Window** child,
Window** target,
Window::StackDirection* direction) = 0;
protected:
virtual ~WindowStackingClient() {}
};
// Sets/gets the WindowStackingClient. This does *not* take ownership of
// |client|. It is assumed the caller will invoke SetWindowStackingClient(NULL)
// before deleting |client|.
AURA_EXPORT void SetWindowStackingClient(WindowStackingClient* client);
AURA_EXPORT WindowStackingClient* GetWindowStackingClient();
} // namespace client
} // namespace aura
#endif // UI_AURA_CLIENT_WINDOW_STACKING_CLIENT_H_