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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_UI_DELEGATE_H_
#define UI_MESSAGE_CENTER_UI_DELEGATE_H_
#include "ui/message_center/message_center_export.h"
namespace message_center {
// A UiDelegate class is responsible for managing the various UI surfaces
// (MessageCenter and popups) as notifications are added and updated.
// Implementations are platform specific.
class MESSAGE_CENTER_EXPORT UiDelegate {
public:
virtual ~UiDelegate(){};
// Called whenever a change to the visible UI has occurred.
virtual void OnMessageCenterContentsChanged() = 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;
// Display the message center containing all undismissed notifications to the
// user. Set |show_by_click| to true if message center is shown by mouse or
// gesture click. Returns true if the center was actually displayed to the
// user.
virtual bool ShowMessageCenter(bool show_by_click) = 0;
// Remove the message center from the UI.
virtual void HideMessageCenter() = 0;
// Display the notifier settings as a bubble.
virtual bool ShowNotifierSettings() = 0;
};
} // namespace message_center
#endif // UI_MESSAGE_CENTER_UI_DELEGATE_H_
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