1  // Copyright (c) Microsoft Corporation
 2  // The Microsoft Corporation licenses this file to you under the MIT license.
 3  // See the LICENSE file in the project root for more information.
 4  
 5  using Microsoft.CmdPal.Core.ViewModels.Models;
 6  using Microsoft.CommandPalette.Extensions;
 7  
 8  namespace Microsoft.CmdPal.Core.ViewModels;
 9  
10  public partial class ProgressViewModel : ExtensionObjectViewModel
11  {
12      public ExtensionObject<IProgressState> Model { get; }
13  
14      public bool IsIndeterminate { get; private set; }
15  
16      public uint ProgressPercent { get; private set; }
17  
18      public ProgressViewModel(IProgressState progress, WeakReference<IPageContext> context)
19          : base(context)
20      {
21          Model = new(progress);
22      }
23  
24      public override void InitializeProperties()
25      {
26          var model = Model.Unsafe;
27          if (model is null)
28          {
29              return; // throw?
30          }
31  
32          IsIndeterminate = model.IsIndeterminate;
33          ProgressPercent = model.ProgressPercent;
34  
35          model.PropChanged += Model_PropChanged;
36      }
37  
38      private void Model_PropChanged(object sender, IPropChangedEventArgs args)
39      {
40          try
41          {
42              FetchProperty(args.PropertyName);
43          }
44          catch (Exception ex)
45          {
46              ShowException(ex);
47          }
48      }
49  
50      protected virtual void FetchProperty(string propertyName)
51      {
52          var model = this.Model.Unsafe;
53          if (model is null)
54          {
55              return; // throw?
56          }
57  
58          switch (propertyName)
59          {
60              case nameof(IsIndeterminate):
61                  this.IsIndeterminate = model.IsIndeterminate;
62                  break;
63              case nameof(ProgressPercent):
64                  this.ProgressPercent = model.ProgressPercent;
65                  break;
66          }
67  
68          UpdateProperty(propertyName);
69      }
70  }