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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_MESSAGE_CENTER_MESSAGE_CENTER_TRAY_DELEGATE_H_
#define UI_MESSAGE_CENTER_MESSAGE_CENTER_TRAY_DELEGATE_H_
#include "ui/message_center/message_center_export.h"
namespace message_center {
// A MessageCenterTrayDelegate class is responsible for managing the various UI
// surfaces that should be displayed when the MessageCenter is changed.
class MESSAGE_CENTER_EXPORT MessageCenterTrayDelegate {
public:
virtual ~MessageCenterTrayDelegate() {};
// Called whenever a change to the visible UI has occurred.
virtual void OnMessageCenterTrayChanged() = 0;
// Display the popup bubbles for new notifications to the user. Returns true
// if popups were actually displayed to the user.
virtual bool ShowPopups() = 0;
// Remove the popup bubbles from the UI.
virtual void HidePopups() = 0;
// Called when a change to the message center could cause a change to popups
// that are currently being displayed.
virtual void UpdatePopups() = 0;
// Display the message center containing all undismissed notifications to the
// user. Returns true if the center was actually displayed to the user.
virtual bool ShowMessageCenter() = 0;
// Remove the message center from the UI.
virtual void HideMessageCenter() = 0;
// Called when a change to the message center could cause a change to the
// message center widget that is currently being displayed.
virtual void UpdateMessageCenter() = 0;
};
} // namespace message_center
#endif // UI_MESSAGE_CENTER_MESSAGE_CENTER_TRAY_DELEGATE_H_
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