athena/system/shutdown_dialog.h

   1 // Copyright 2014 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 ATHENA_SYSTEM_SHUTDOWN_DIALOG_H_
   6 #define ATHENA_SYSTEM_SHUTDOWN_DIALOG_H_
   7
   8 #include "athena/input/public/input_manager.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/time/time.h"
  11 #include "base/timer/timer.h"
  12
  13 namespace aura {
  14 class Window;
  15 }
  16
  17 namespace views {
  18 class Widget;
  19 }
  20
  21 namespace athena {
  22
  23 // Shuts down in response to the power button being pressed.
  24 class ShutdownDialog : public PowerButtonObserver {
  25  public:
  26   explicit ShutdownDialog();
  27   ~ShutdownDialog() override;
  28
  29  private:
  30   enum State {
  31     // Releasing the power button sends a suspend request.
  32     STATE_SUSPEND_ON_RELEASE,
  33
  34     // A warning that the device is about to be shutdown is visible. Releasing
  35     // the power button does not send a suspend or a shutdown request.
  36     STATE_SHUTDOWN_WARNING_VISIBLE,
  37
  38     // A D-Bus shutdown request has been sent. Shutdown cannot be canceled.
  39     STATE_SHUTDOWN_REQUESTED,
  40
  41     STATE_OTHER
  42   };
  43
  44   // Shows the shutdown warning dialog.
  45   void ShowShutdownWarningDialog();
  46
  47   // Requests shutdown.
  48   void Shutdown();
  49
  50   // PowerButtonObserver:
  51   void OnPowerButtonStateChanged(PowerButtonObserver::State state) override;
  52
  53   // |shutdown_warning_message_|'s parent container.
  54   aura::Window* warning_message_container_;
  55
  56   // Shows a warning that the device is about to be shutdown.
  57   scoped_ptr<views::Widget> shutdown_warning_message_;
  58
  59   State state_;
  60
  61   base::OneShotTimer<ShutdownDialog> timer_;
  62
  63   DISALLOW_COPY_AND_ASSIGN(ShutdownDialog);
  64 };
  65
  66 }  // namespace athena
  67
  68 #endif  // ATHENA_SYSTEM_SHUTDOWN_DIALOG_H_