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// Copyright (c) 2012 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_PANEL_LAYOUT_MANAGER_H_
#define ASH_WM_PANEL_LAYOUT_MANAGER_H_
#pragma once
#include <list>
#include "ash/ash_export.h"
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "ui/aura/layout_manager.h"
namespace aura {
class Window;
}
namespace gfx {
class Rect;
}
namespace ash {
namespace internal {
// PanelLayoutManager is responsible for organizing panels within the
// workspace. It is associated with a specific container window (i.e.
// kShellWindowId_PanelContainer) and controls the layout of any windows
// added to that container.
//
// The constructor takes a |panel_container| argument which is expected to set
// its layout manager to this instance, e.g.:
// panel_container->SetLayoutManager(new PanelLayoutManager(panel_container));
class ASH_EXPORT PanelLayoutManager : public aura::LayoutManager {
public:
explicit PanelLayoutManager(aura::Window* panel_container);
virtual ~PanelLayoutManager();
// Overridden from aura::LayoutManager:
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;
private:
typedef std::list<aura::Window*> PanelList;
// Called whenever the panel layout might change.
void Relayout();
// Parent window associated with this layout manager.
aura::Window* panel_container_;
// Protect against recursive calls to Relayout().
bool in_layout_;
// Ordered list of unowned pointers to panel windows.
PanelList panel_windows_;
DISALLOW_COPY_AND_ASSIGN(PanelLayoutManager);
};
} // namespace internal
} // namespace ash
#endif // ASH_WM_PANEL_LAYOUT_MANAGER_H_
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