ConsEco/Code/IHM/Navigator.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;

namespace IHM
{
    public class Navigator : INotifyPropertyChanged
    {
        public const string PART_COMPTE = "Compte";
        public const string PART_OPERATION = "Opération";
        public const string PART_ECHEANCIER = "Echéancier";
        public const string PART_PLANNIFICATION = "Plannification";
        public const string PART_STATISTIQUE = "Statistique";

        public const string PART_CONNEXION = "Connexion";

        public ReadOnlyDictionary<string, Func<UserControl>> WindowPart { get; private set; }

        Dictionary<string, Func<UserControl>> windowPart { get; set; } = new Dictionary<string, Func<UserControl>>
        {
            [PART_COMPTE] = () => new UCCompte(),
            // [PART_OPERATION] = () => new UCOperation(),
            // [PART_ECHEANCIER] = () => new UCEcheancier(),
            // [PART_PLANNIFICATION] = () => new UCPlannification(),
            // [PART_STATISTIQUE] = () => new UCStatistique(),
        };

        public ReadOnlyDictionary<string, Func<UserControl>> WindowMain { get; private set; }

        Dictionary<string, Func<UserControl>> windowMain { get; set; } = new Dictionary<string, Func<UserControl>>
        {
            [PART_CONNEXION] = () => new UCConnexion(),
        };

        public Navigator()
        {
            WindowPart = new ReadOnlyDictionary<string, Func<UserControl>>(windowPart);
            WindowMain = new ReadOnlyDictionary<string, Func<UserControl>>(windowMain);

            SelectedUserControlCreator = windowMain.First();
        }

        public KeyValuePair<string, Func<UserControl>> SelectedUserControlCreator
        {
            get => selectedUserControlCreator;
            set
            {
                if (selectedUserControlCreator.Equals(value)) return;
                selectedUserControlCreator = value;
                OnPropertyChanged();
            }
        }

        private KeyValuePair<string, Func<UserControl>> selectedUserControlCreator;

        public event PropertyChangedEventHandler PropertyChanged;
        void OnPropertyChanged([CallerMemberName] string propertyName = "")
            => PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

        public void NavigateTo(string windowPartName)
        {
            if (WindowPart.ContainsKey(windowPartName))
            {
                selectedUserControlCreator = WindowPart.Single(kvp => kvp.Key == windowPartName);
            }
        }
    }
}