1// Copyright 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 ASH_SYSTEM_TRAY_TRACING_H_
6#define ASH_SYSTEM_TRAY_TRACING_H_
7
8#include "ash/ash_export.h"
9#include "ash/system/tray/tray_image_item.h"
10
11namespace views {
12class View;
13}
14
15namespace ash {
16
17class ASH_EXPORT TracingObserver {
18 public:
19  virtual ~TracingObserver() {}
20
21  // Notifies when tracing mode changes.
22  virtual void OnTracingModeChanged(bool value) = 0;
23};
24
25namespace internal {
26
27// This is the item that displays when users enable performance tracing at
28// chrome://slow.  It alerts them that this mode is running, and provides an
29// easy way to open the page to disable it.
30class TrayTracing : public TrayImageItem,
31                    public TracingObserver {
32 public:
33  explicit TrayTracing(SystemTray* system_tray);
34  virtual ~TrayTracing();
35
36 private:
37  void SetTrayIconVisible(bool visible);
38
39  // Overridden from TrayImageItem.
40  virtual bool GetInitialVisibility() OVERRIDE;
41  virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
42  virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE;
43  virtual void DestroyDefaultView() OVERRIDE;
44  virtual void DestroyDetailedView() OVERRIDE;
45
46  // Overridden from TracingObserver.
47  virtual void OnTracingModeChanged(bool value) OVERRIDE;
48
49  views::View* default_;
50
51  DISALLOW_COPY_AND_ASSIGN(TrayTracing);
52};
53
54}  // namespace internal
55}  // namespace ash
56
57#endif  // ASH_SYSTEM_TRAY_TRACING_H_
58