refactor & fix ZoomToFit not unhiding nodes

Author: zHaytam

src/Blazor.Diagrams.Core/Default/PanSubManager.cs

@@ -34,7 +34,7 @@ private void DiagramManager_MouseMove(Model model, MouseEventArgs e)
 
             var deltaX = e.ClientX - _lastClientX - (DiagramManager.Pan.X - _initialPan.X);
             var deltaY = e.ClientY - _lastClientY - (DiagramManager.Pan.Y - _initialPan.Y);
-            DiagramManager.ChangePan(deltaX, deltaY);
+            DiagramManager.UpdatePan(deltaX, deltaY);
         }
 
         private void DiagramManager_MouseUp(Model model, MouseEventArgs e)

src/Blazor.Diagrams.Core/Default/ZoomSubManager.cs

@@ -38,7 +38,7 @@ private void DiagramManager_Wheel(WheelEventArgs e)
             var newPanY = DiagramManager.Pan.Y - heightDiff * yFactor;
 
             DiagramManager.Pan = new Point(newPanX, newPanY);
-            DiagramManager.ChangeZoom(newZoom);
+            DiagramManager.SetZoom(newZoom);
         }
 
         public override void Dispose()

src/Blazor.Diagrams.Core/DiagramManager.cs

@@ -312,7 +312,7 @@ public void ZoomToFit(double margin = 10)
 
             var nx = Container.Left + Pan.X + minX * Zoom;
             var ny = Container.Top + Pan.Y + minY * Zoom;
-            Pan = Pan.Add(Container.Left - nx, Container.Top - ny);
+            UpdatePan(Container.Left - nx, Container.Top - ny);
 
             Refresh();
         }
@@ -350,21 +350,21 @@ public void ZoomToFit(double margin = 10)
             return (minX, maxX, minY, maxY);
         }
 
-        public void ChangePan(double deltaX, double deltaY)
+        public void UpdatePan(double deltaX, double deltaY)
         {
             Pan = Pan.Add(deltaX, deltaY);
             PanChanged?.Invoke();
             Refresh();
         }
 
-        public void ChangeZoom(double newZoom)
+        public void SetZoom(double newZoom)
         {
             Zoom = newZoom;
             ZoomChanged?.Invoke();
             Refresh();
         }
 
-        internal void ChangeContainer(Rectangle newRect)
+        internal void SetContainer(Rectangle newRect)
         {
             Container = newRect;
             ContainerChanged?.Invoke();

src/Blazor.Diagrams/Components/DiagramCanvas.razor.cs

@@ -53,7 +53,7 @@ protected override async Task OnAfterRenderAsync(bool firstRender)
         }
 
         [JSInvokable]
-        public void OnResize(Rectangle rect) => DiagramManager.ChangeContainer(rect);
+        public void OnResize(Rectangle rect) => DiagramManager.SetContainer(rect);
 
         protected override bool ShouldRender()
         {