Initial Commit

PortfolioManager/ViewModels/WorkspaceViewModel.cs

@@ -0,0 +1,110 @@
+using System;
+using System.Collections.ObjectModel;
+using Avalonia.Controls;
+using CommunityToolkit.Mvvm.Input;
+
+namespace PortfolioManager.ViewModels
+{
+  public delegate void InstantiateWorkspace(SaveParameters saveParameters);
+
+  public abstract class WorkspaceViewModel : ViewModelBase
+  {
+    // Relay Command
+    private RelayCommand closeCommand;
+
+    // Events
+    public event EventHandler RequestClose;
+
+    private InstantiateWorkspace workspaceInstantiator;
+    private bool canClose = true;
+    private bool isClosed = false;
+    private String title = "WorkspaceViewModel";
+
+    public WorkspaceViewModel Referer { get; set; }
+
+    protected WorkspaceViewModel()
+    {
+    }
+
+    public InstantiateWorkspace WorkspaceInstantiator
+    {
+      get
+      {
+        return workspaceInstantiator;
+      }
+      set
+      {
+        workspaceInstantiator = value;
+      }
+    }
+
+    public IRelayCommand CloseCommand
+    {
+      get
+      {
+        if (null == closeCommand)
+        {
+          Action closeAction = delegate ()
+          {
+            this.OnRequestClose();
+          };
+          closeCommand = new RelayCommand(delegate () { this.OnRequestClose(); });
+        }
+        return closeCommand;
+      }
+    }
+
+    public bool IsClosed
+    {
+      get { return isClosed; }
+      set
+      {
+        if (isClosed != value)
+        {
+          isClosed = value;
+          base.OnPropertyChanged("IsClosed");
+        }
+      }
+    }
+
+    public bool CanClose
+    {
+      get { return canClose; }
+      set
+      {
+        if (canClose != value)
+        {
+          canClose = value;
+          base.OnPropertyChanged("CanClose");
+        }
+      }
+    }
+
+    public virtual String Title
+    {
+      get
+      {
+        return title;
+      }
+      set
+      {
+        title = value;
+        base.OnPropertyChanged("Title");
+      }
+    }
+
+    public virtual String Header
+    {
+      get
+      {
+        return title;
+      }
+    }
+
+    private void OnRequestClose()
+    {
+      EventHandler handler = this.RequestClose;
+      if (null != handler) handler(this, EventArgs.Empty);
+    }
+  }
+}