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// Copyright (c) 2011 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 ASH_WM_TOPLEVEL_LAYOUT_MANAGER_H_
#define ASH_WM_TOPLEVEL_LAYOUT_MANAGER_H_
#pragma once
#include <set>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "ui/aura/layout_manager.h"
#include "ui/aura/window_observer.h"
#include "ash/ash_export.h"
namespace aura_shell {
namespace internal {
class ShelfLayoutManager;
// ToplevelLayoutManager is the LayoutManager installed on a container that
// hosts what the shell considers to be top-level windows. It is used if the
// WorkspaceManager is not enabled. ToplevelLayoutManager listens for changes to
// kShowStateKey and resizes the window appropriately.
class ASH_EXPORT ToplevelLayoutManager : public aura::LayoutManager,
public aura::WindowObserver {
public:
ToplevelLayoutManager();
virtual ~ToplevelLayoutManager();
void set_shelf(ShelfLayoutManager* shelf) { shelf_ = shelf; }
// LayoutManager overrides:
virtual void OnWindowResized() OVERRIDE;
virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
virtual void OnChildWindowVisibilityChanged(aura::Window* child,
bool visibile) OVERRIDE;
virtual void SetChildBounds(aura::Window* child,
const gfx::Rect& requested_bounds) OVERRIDE;
// WindowObserver overrides:
virtual void OnWindowPropertyChanged(aura::Window* window,
const char* name,
void* old) OVERRIDE;
private:
typedef std::set<aura::Window*> Windows;
// Updates the visibility of the shelf based on if there are any full screen
// windows.
void UpdateShelfVisibility();
// Set of windows we're listening to.
Windows windows_;
// May be NULL if we're not using a shelf.
ShelfLayoutManager* shelf_;
DISALLOW_COPY_AND_ASSIGN(ToplevelLayoutManager);
};
} // namespace aura_shell
} // namespace internal
#endif // ASH_WM_TOPLEVEL_LAYOUT_MANAGER_H_
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