blob: a65e5cfea738e5ccd5de6fae493d66646bfd5ef2 [file] [log] [blame]
// Copyright 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.
#include "ash/ash_export.h"
#include "ash/shelf/shelf_item_types.h"
namespace ash {
struct ShelfItem;
class ASH_EXPORT ShelfModelObserver {
// Invoked after an item has been added to the model.
virtual void ShelfItemAdded(int index) = 0;
// Invoked after an item has been removed. |index| is the index the item was
// at.
virtual void ShelfItemRemoved(int index, ShelfID id) = 0;
// Invoked after an item has been moved. See ShelfModel::Move() for details
// of the arguments.
virtual void ShelfItemMoved(int start_index, int target_index) = 0;
// Invoked when the state of an item changes. |old_item| is the item
// before the change.
virtual void ShelfItemChanged(int index, const ShelfItem& old_item) = 0;
// Invoked when shelf status is changed.
virtual void ShelfStatusChanged() = 0;
virtual ~ShelfModelObserver() {}
} // namespace ash