ui/message_center/message_center_tray_delegate.h

   1 // Copyright (c) 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 UI_MESSAGE_CENTER_MESSAGE_CENTER_TRAY_DELEGATE_H_
   6 #define UI_MESSAGE_CENTER_MESSAGE_CENTER_TRAY_DELEGATE_H_
   7
   8 #include "ui/message_center/message_center_export.h"
   9
  10 namespace message_center {
  11
  12 class MessageCenterTray;
  13
  14 // A MessageCenterTrayDelegate class is responsible for managing the various UI
  15 // surfaces that should be displayed when the MessageCenter is changed.
  16 class MESSAGE_CENTER_EXPORT MessageCenterTrayDelegate {
  17  public:
  18   virtual ~MessageCenterTrayDelegate() {};
  19
  20   // Called whenever a change to the visible UI has occurred.
  21   virtual void OnMessageCenterTrayChanged() = 0;
  22
  23   // Display the popup bubbles for new notifications to the user.  Returns true
  24   // if popups were actually displayed to the user.
  25   virtual bool ShowPopups() = 0;
  26
  27   // Remove the popup bubbles from the UI.
  28   virtual void HidePopups() = 0;
  29
  30   // Display the message center containing all undismissed notifications to the
  31   // user.  Returns true if the center was actually displayed to the user.
  32   virtual bool ShowMessageCenter() = 0;
  33
  34   // Remove the message center from the UI.
  35   virtual void HideMessageCenter() = 0;
  36
  37   // Display the notifier settings as a bubble.
  38   virtual bool ShowNotifierSettings() = 0;
  39
  40   // Returns true if the context menu for a notification is currently enabled.
  41   virtual bool IsContextMenuEnabled() const = 0;
  42
  43   // Show a platform-specific UI that informs the user how to open the message
  44   // center.
  45   virtual void DisplayFirstRunBalloon() {}
  46
  47   virtual MessageCenterTray* GetMessageCenterTray() = 0;
  48 };
  49
  50 }  // namespace message_center
  51
  52 #endif  // UI_MESSAGE_CENTER_MESSAGE_CENTER_TRAY_DELEGATE_H_