//******************************************************************************************************
//  ViewModelBase.cs - Gbtc
//
//  Copyright © 2012, Grid Protection Alliance.  All Rights Reserved.
//
//  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See
//  the NOTICE file distributed with this work for additional information regarding copyright ownership.
//  The GPA licenses this file to you under the MIT License (MIT), the "License"; you may
//  not use this file except in compliance with the License. You may obtain a copy of the License at:
//
//      http://www.opensource.org/licenses/MIT
//
//  Unless agreed to in writing, the subject software distributed under the License is distributed on an
//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the
//  License for the specific language governing permissions and limitations.
//
//  Code Modification History:
//  ----------------------------------------------------------------------------------------------------
//  03/25/2011 - Mehulbhai P Thakkar
//       Generated original version of source code.
//  12/20/2012 - Starlynn Danyelle Gilliam
//       Modified Header.
//
//******************************************************************************************************

using System;
using System.ComponentModel;
using System.Windows;

namespace GSF.TimeSeries.UI
{
    /// <summary>
    /// Represents an abstract class from which all ViewModel objects will derive.
    /// </summary>
    public abstract class ViewModelBase : INotifyPropertyChanged
    {
        #region [ Members ]

        //Events

        /// <summary>
        /// Raised when a property on this object has a new value.
        /// </summary>
        public event PropertyChangedEventHandler PropertyChanged;

        #endregion

        #region [ Properties ]

        /// <summary>
        /// Gets a <see cref="MessageBox"/> to display information to UI user.
        /// </summary>
        public Action<string, string, MessageBoxImage> Popup
        {
            get
            {
                return (Action<string, string, MessageBoxImage>)((message, caption, messageBoxImage) => MessageBox.Show(Application.Current.MainWindow, message, caption, MessageBoxButton.OK, messageBoxImage));
            }
        }

        /// <summary>
        /// Gets a <see cref="MessageBox"/> to request confirmation from UI user.
        /// </summary>
        public Func<string, string, bool> Confirm
        {
            get
            {
                return (Func<string, string, bool>)((message, caption) => MessageBox.Show(Application.Current.MainWindow, message, caption, MessageBoxButton.YesNo) == MessageBoxResult.Yes);
            }
        }

        #endregion

        #region [ Methods ]

        /// <summary>
        /// Raises the <see cref="PropertyChanged"/> event.
        /// </summary>
        /// <param name="propertyName">The property that has a new value.</param>
        protected void OnPropertyChanged(string propertyName)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }

        #endregion
    }
}