ash/system/chromeos/tray_tracing.h

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