1 files changed, 13 insertions, 7 deletions
diff --git a/UVtools.Core/Operations/OperationFlip.cs b/UVtools.Core/Operations/OperationFlip.cs
index 5381d1b..26fbf18 100644
--- a/UVtools.Core/Operations/OperationFlip.cs
+++ b/UVtools.Core/Operations/OperationFlip.cs
@@ -87,6 +87,14 @@ namespace UVtools.Core.Operations
         }
         #endregion
 
+        #region Constructor
+
+        public OperationFlip() { }
+
+        public OperationFlip(FileFormat slicerFile) : base(slicerFile) { }
+
+        #endregion
+
         #region Equality
 
         protected bool Equals(OperationFlip other)
@@ -113,24 +121,22 @@ namespace UVtools.Core.Operations
         #endregion
 
         #region Methods
-        public override bool Execute(FileFormat slicerFile, OperationProgress progress = null)
+        protected override bool ExecuteInternally(OperationProgress progress)
         {
-            progress ??= new OperationProgress();
-            progress.Reset(ProgressAction, LayerRangeCount);
             Parallel.For(LayerIndexStart, LayerIndexEnd + 1, layerIndex =>
             {
                 if (progress.Token.IsCancellationRequested) return;
-                using var mat = slicerFile[layerIndex].LayerMat;
+                using var mat = SlicerFile[layerIndex].LayerMat;
                 Execute(mat);
-                slicerFile[layerIndex].LayerMat = mat;
+                SlicerFile[layerIndex].LayerMat = mat;
 
                 lock (progress.Mutex)
                 {
                     progress++;
                 }
             });
-            progress.Token.ThrowIfCancellationRequested();
-            return true;
+            
+            return !progress.Token.IsCancellationRequested;
         }
 
         public override bool Execute(Mat mat, params object[] arguments)