//
// Author:
//   Michael Göricke
//
// Copyright (c) 2019
//
// This file is part of ShapeConverter.
//
// ShapeConverter is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see<http://www.gnu.org/licenses/>.

using System;
using System.ComponentModel;
using System.Runtime.CompilerServices;

namespace ShapeConverter.Shell.MVVM
{
    /// <summary>
    /// view model base
    /// </summary>
    public class ViewModelBase : INotifyPropertyChanged
    {
        /// <summary>
        /// The PropertyChanged event
        /// </summary>
        public event PropertyChangedEventHandler PropertyChanged;

        /// <summary>
        /// Notify the change of a property
        /// </summary>
        protected void NotifyPropertyChanged([CallerMemberName]String info = "")
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(info));
        }

        /// <summary>
        /// Set the field and notify the change of a property
        /// </summary>
        protected void SetProperty<T>(ref T field, T value, [CallerMemberName] string propertyName = null)
        {
            if (Equals(field, value))
            {
                return;
            }

            field = value;
            NotifyPropertyChanged(propertyName);
        }
    }
}
