ash/system/chromeos/tray_display.h

   1 // Copyright (c) 2012 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_CHROMEOS_TRAY_DISPLAY_H_
   6 #define ASH_SYSTEM_CHROMEOS_TRAY_DISPLAY_H_
   7
   8 #include <map>
   9
  10 #include "ash/ash_export.h"
  11 #include "ash/display/display_controller.h"
  12 #include "ash/display/display_info.h"
  13 #include "ash/system/tray/system_tray_item.h"
  14 #include "base/strings/string16.h"
  15 #include "ui/views/view.h"
  16
  17 namespace ash {
  18 class DisplayView;
  19
  20 namespace test {
  21 class AshTestBase;
  22 }
  23
  24 class ASH_EXPORT TrayDisplay : public SystemTrayItem,
  25                                public DisplayController::Observer {
  26  public:
  27   explicit TrayDisplay(SystemTray* system_tray);
  28   ~TrayDisplay() override;
  29
  30   // Overridden from DisplayControllerObserver:
  31   void OnDisplayConfigurationChanged() override;
  32
  33  private:
  34   friend class TrayDisplayTest;
  35
  36   typedef std::map<int64, DisplayInfo> DisplayInfoMap;
  37
  38   static const char kNotificationId[];
  39
  40   // Scans the current display info and updates |display_info_|. Sets the
  41   // previous data to |old_info| if it's not NULL.
  42   void UpdateDisplayInfo(DisplayInfoMap* old_info);
  43
  44   // Compares the current display settings with |old_info| and determine what
  45   // message should be shown for notification. Returns true if there's a
  46   // meaningful change. Note that it's possible to return true and set
  47   // |message_out| to empty, which means the notification should be removed. It
  48   // also sets |additional_message_out| which appears in the notification with
  49   // the |message_out|.
  50   bool GetDisplayMessageForNotification(
  51       const DisplayInfoMap& old_info,
  52       base::string16* message_out,
  53       base::string16* additional_message_out);
  54
  55   // Creates or updates the display notification.
  56   void CreateOrUpdateNotification(const base::string16& message,
  57                                   const base::string16& additional_message);
  58
  59   // Overridden from SystemTrayItem.
  60   views::View* CreateDefaultView(user::LoginStatus status) override;
  61   void DestroyDefaultView() override;
  62
  63   // Test accessors.
  64   base::string16 GetDefaultViewMessage() const;
  65   bool GetAccessibleStateForTesting(ui::AXViewState* state);
  66   const views::View* default_view() const {
  67     return reinterpret_cast<views::View*>(default_);
  68   }
  69
  70   DisplayView* default_;
  71   DisplayInfoMap display_info_;
  72
  73   DISALLOW_COPY_AND_ASSIGN(TrayDisplay);
  74 };
  75
  76 }  // namespace ash
  77
  78 #endif  // ASH_SYSTEM_CHROMEOS_TRAY_DISPLAY_H_