Implement path selection

PamhagenSysCtrl/Helpers/Pipeline/Pump.cs

@@ -58,7 +58,7 @@ namespace PamhagenSysCtrl.Helpers.Pipeline {
             canvas.Children.Add(_text);
         }
 
-        public bool Update(double x, double y) {
+        public bool Update(double x, double y, bool down) {
             var hover = Math.Sqrt(Math.Pow(CenterX - x, 2) + Math.Pow(CenterY - y, 2)) <= DIAMETER / 2;
             _circle?.Fill = hover ? Brushes.LightGray : Brushes.WhiteSmoke;
             return hover;