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- WPF Client (empty) - MVVM code base (limited) - Images, Sprites, and other Rss
2020-01-09 17:10:28 -06:00
parent 959ece4d7c
commit eaac71df55
102 changed files with 519 additions and 0 deletions
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+using System;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+using SeriusSoft.Frameworks.MVVM.Core;
+using SeriusSoft.Frameworks.MVVM.Exceptions;
+
+namespace SeriusSoft.Frameworks.MVVM.ViewModels
+{
+  /// <summary>
+  /// <para>Note that this is almost the same as the BaseViewModel.</para>
+  /// <para>The difference is that if you use the Begin_ViewModelUpdates() and End_ViewModelUpdates() methods, calls to RaisePropertyChanged will be ignored so long as:</para>
+  /// <para> - this.IsInBatchMode is false</para>
+  /// <para> - OR this.OverrideBatchModeLock is true</para>
+  /// <para> - Note that this means that the RaiseAllBackedPropertiesChanged will essentially do nothing even when overridden because you will be unable to trigger the PropertyChanged events w/o overriding the RaisePropertyChanged method.</para>
+  /// </summary>
+  public abstract class BatchableBaseViewModel : BaseViewModel, IBatchable, INotifyPropertyChanged, IBackedByModel
+  {
+    public bool IsInBatchMode { get; set; }
+    public bool OverrideBatchModeLock { get; set; }
+
+    public void Begin_ViewModelUpdates()
+    {
+      if ( this.IsInBatchMode )
+        throw new AlreadyInBatchModeException(this.GetType().FullName);
+
+      this.IsInBatchMode = true;
+    }
+
+    public void End_ViewModelUpdates()
+    {
+      if (!this.IsInBatchMode)
+        throw new NotInBatchModeException(this.GetType().FullName);
+
+      this.IsInBatchMode = false;
+    }
+
+    protected override void RaisePropertyChanged([CallerMemberName] string member = "")
+    {
+      if ( !this.OverrideBatchModeLock && this.IsInBatchMode )
+        return;
+
+      base.RaisePropertyChanged(member);
+    }
+  }
+}