Plane.FormationCreator/Plane.FormationCreator/AppEx.cs

using Plane.FormationCreator.Formation;
using GalaSoft.MvvmLight;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Plane.FormationCreator
{
    public class AppEx : ObservableObject
    {
        public static AppEx Current { get; } = new AppEx();

        private AppEx() { }

        private bool _IsInFastMode = true;
        public bool IsInFastMode
        {
            get { return _IsInFastMode; }
            set { Set(nameof(IsInFastMode), ref _IsInFastMode, value); }
        }

        private AppMode _AppMode = AppMode.ModifyingTask;
        public AppMode AppMode
        {
            get { return _AppMode; }
            set
            {
                bool changed = _AppMode != value;
                var oldItem = _AppMode;
                Set(nameof(AppMode), ref _AppMode, value);
                if (changed)
                {
                    AppModeChanged?.Invoke(this, new PropertyChangedEventArgs<AppMode>
                    {
                        OldItem = oldItem,
                        NewItem = value
                    });
                }
            }
        }

        private bool _ShowModifyTaskView = false;
        public bool ShowModifyTaskView
        {
            get { return _ShowModifyTaskView; }
            set { Set(nameof(ShowModifyTaskView), ref _ShowModifyTaskView, value); }
        }

        public event EventHandler<PropertyChangedEventArgs<AppMode>> AppModeChanged;
    }
}