Display filling level

PamhagenSysCtrl/Helpers/Pipeline/Tank.cs

@@ -14,27 +14,26 @@ namespace PamhagenSysCtrl.Helpers.Pipeline {
         public double TopY => CenterY - HEIGHT / 2;
         public double BottomY => CenterY + HEIGHT / 2;
         public string Label { get; set; }
-        public bool IsFull => CallbackIsFull();
-        public bool IsFilled => CallbackIsFilled();
+        public FillState FillState => CallbackFillState();
+        public bool IsFull => FillState == FillState.Full;
+        public bool IsFilled => FillState != FillState.Empty;
 
         public ISet<IEdge> Inputs { get; init; }
         public ISet<IEdge> Outputs { get; init; }
 
         public int? CapacityLiters { get; set; }
 
-        protected Func<bool> CallbackIsFilled;
-        protected Func<bool> CallbackIsFull;
+        protected Func<FillState> CallbackFillState;
 
         private Shape? _rect;
         private TextBlock? _text;
 
-        public Tank(string label, double x, double y, int capacityLiters, Func<bool> cbFilled, Func<bool> cbFull) {
+        public Tank(string label, double x, double y, int capacityLiters, Func<FillState> cbFillState) {
             CenterX = x;
             CenterY = y;
             Label = label;
             CapacityLiters = capacityLiters;
-            CallbackIsFilled = cbFilled;
-            CallbackIsFull = cbFull;
+            CallbackFillState = cbFillState;
             Inputs = new HashSet<IEdge>();
             Outputs = new HashSet<IEdge>();
         }
@@ -67,7 +66,11 @@ namespace PamhagenSysCtrl.Helpers.Pipeline {
         }
 
         public void Update(bool isHovering, bool isPressed) {
-            _rect?.Fill = isHovering ? Brushes.LightGray : Brushes.WhiteSmoke;
+            _rect?.Fill = PamhagenBrushes.ForFillState(FillState,
+                isHovering && isPressed ? Brushes.DarkGray :
+                isHovering ? Brushes.LightGray :
+                Brushes.WhiteSmoke
+            );
         }
     }
 }