I working with custom nodes, and custom handles.

var TopLeft = new Point(0, 0);
          e.Graphics.DrawRectangle(form.SelectedItemHandlesStyle.PatternBrush, form.SelectedItemHandlesStyle.DashPen, new Rect(TopLeft, size));
         


The foudn a problem with custom handles.
When i rotate node, cant resize.

If i use some default handles provided work ok, but with custom handles no.

Why this happen?
Have some workaround fro fix this?

Best regards.

private void form_HitTestAdjustmentHandles(object sender, HitTestEventArgs e)
   {
      var node = e.Item as DiagramNode;
      var size = new Size(
          form.AdjustmentHandlesSize,
          form.AdjustmentHandlesSize);

      Rect r = e.Item.GetBounds();

      if (r.Contains(e.MousePosition))

          e.HitResult = 8; 


      if (node != null)
      {
          var location = node.Bounds.Location;
          var diagOffset = new Vector(location.X, location.Y);

        
          var TopLeft = new Point(0, 0);
          var TopLeftRect = new Rect(TopLeft, size);
          if (TopLeftRect.Contains(e.MousePosition - diagOffset))
              e.HitResult = 0;



          var TopMiddle = new Point(node.Bounds.Width / 2 - size.Width / 2, 0);
          var TopMiddleRect = new Rect(TopMiddle, size);
          if (TopMiddleRect.Contains(e.MousePosition - diagOffset))
              e.HitResult = 4;


          var TopRight = new Point(node.Bounds.Width - size.Width, 0);
          var TopRightRect = new Rect(TopRight, size);
          if (TopRightRect.Contains(e.MousePosition - diagOffset))
              e.HitResult = 1;

         
          var MiddleLeft = new Point(0, node.Bounds.Height / 2 - size.Height / 2);
          var MiddleLeftRect = new Rect(MiddleLeft, size);
          if (MiddleLeftRect.Contains(e.MousePosition - diagOffset))
              e.HitResult = 7;

         
        
          var MiddleRight = new Point(node.Bounds.Width - size.Width, node.Bounds.Height / 2 - size.Height / 2);
          var MiddleRightRect = new Rect(MiddleRight, size);
          if (MiddleRightRect.Contains(e.MousePosition - diagOffset))
              e.HitResult = 5;


          var bottomLeft = new Point(0, node.Bounds.Height - size.Height);
          var bottomLeftRect = new Rect(bottomLeft, size);
          if (bottomLeftRect.Contains(e.MousePosition - diagOffset))
              e.HitResult = 3;



          var bottomMiddle = new Point(node.Bounds.Width / 2 - size.Width / 2, node.Bounds.Height - size.Height);
          var bottomMiddleRect = new Rect(bottomMiddle, size);
          if (bottomMiddleRect.Contains(e.MousePosition - diagOffset))
              e.HitResult = 6;


          var bottomRight = new Point(node.Bounds.Width - size.Width, node.Bounds.Height - size.Height);
          var bottomRightRect = new Rect(bottomRight, size);
          if (bottomRightRect.Contains(e.MousePosition - diagOffset))
              e.HitResult = 2;
      }
   }






void form_DrawAdjustmentHandles(object sender, DrawItemEventArgs e)
{
var node = e.Item as DiagramNode;
var size = new Size(form.AdjustmentHandlesSize,form.AdjustmentHandlesSize);
   

if (node != null)
{
         
          var TopLeft = new Point(0, 0);
          e.Graphics.DrawRectangle(form.SelectedItemHandlesStyle.PatternBrush, form.SelectedItemHandlesStyle.DashPen, new Rect(TopLeft, size));
         

          var TopMiddle = new Point(node.Bounds.Width / 2 - size.Width / 2, 0);
          e.Graphics.DrawRectangle(form.SelectedItemHandlesStyle.PatternBrush, form.SelectedItemHandlesStyle.DashPen, new Rect(TopMiddle, size));

          var TopRight = new Point(node.Bounds.Width  - size.Width , 0);
          e.Graphics.DrawRectangle(form.SelectedItemHandlesStyle.PatternBrush, form.SelectedItemHandlesStyle.DashPen, new Rect(TopRight, size));


          var MiddleTop = new Point(0, node.Bounds.Height /2 - size.Height /2);
          e.Graphics.DrawRectangle(form.SelectedItemHandlesStyle.PatternBrush, form.SelectedItemHandlesStyle.DashPen, new Rect(MiddleTop, size));

          var MiddleBott = new Point(node.Bounds.Width - size.Width, node.Bounds.Height / 2 - size.Height / 2);
          e.Graphics.DrawRectangle(form.SelectedItemHandlesStyle.PatternBrush, form.SelectedItemHandlesStyle.DashPen, new Rect(MiddleBott, size));

          var bottomLeft = new Point(0, node.Bounds.Height - size.Height);
          e.Graphics.DrawRectangle(form.SelectedItemHandlesStyle.PatternBrush, form.SelectedItemHandlesStyle.DashPen, new Rect(bottomLeft, size));
      
        
    var bottomMiddle = new Point(node.Bounds.Width / 2 - size.Width / 2,node.Bounds.Height - size.Height);
           e.Graphics.DrawRectangle(form.SelectedItemHandlesStyle.PatternBrush, form.SelectedItemHandlesStyle.DashPen, new Rect(bottomMiddle, size));

           var bottomRight = new Point(node.Bounds.Width  - size.Width ,node.Bounds.Height - size.Height);
           e.Graphics.DrawRectangle(form.SelectedItemHandlesStyle.PatternBrush, form.SelectedItemHandlesStyle.DashPen, new Rect(bottomRight, size));

        
}
}

Really sorry but not understand how this work.
Can rotate correclty what cant do is RESIZE node rotated.
M rotating my nodes in this way:
node.RotationAngle = 90;

I not understand your solution and how apply.
Please can put complete example?
Best regards.

Stoyo, after roatte i can resize, but see a new problem.
Only can drag and move the object selecting form the center only.

Why this happen and how can fix this, when object is rotated is very hard move the node, can drag, only can drag form the center.

A simple example for ilustrate thsi stiaution is create a simple large vertical shape, then rotate, and try drag, you cna see can drag and move only if drag the object form the center.

If shape is perfect square, or perfect circle not have any problem to drag selecting te node form any palce and the drag andmove.
Only happen when is a large rectangle shape.

Hoppe can help to me with this.

Thankyiu fixed now!
Return comented.

Rect r = e.Item.GetBounds();
if (node != null)
{
var location = node.Bounds.Location;
var diagOffset = new Vector(location.X, location.Y);
double rotationAngle = node.RotationAngle;

Point localPoint = RotatePointAt(e.MousePosition, node.GetCenter(), -rotationAngle);
if (r.Contains(localPoint))
{
e.HitResult = 8;
//return;
}

localPoint = localPoint - diagOffset;
...