I have created several dynamic controls in my form, and setting the BorderSpacing property produces consistently incorrect results. Dynamically created controls will exhibit borders between themselves, but not to the parent object. What am I doing wrong?

Here is a chunk of the offending code.

  for index := 0 to 8 do begin
    labSurface [index] := tLabel.Create (Application);
    with (labSurface [index]) do begin
      parent := tabSurface;
      Caption := LocationNames [index];
      BorderSpacing.Around := 8;
      BorderSpacing.Left := 8;
      Anchors := [akTop, akLeft];
    end;
  end;
  labSurface [0].AnchorSide [akTop].Control := labSurfaceLocation;
  labSurface [0].AnchorSide [akTop].Side := asrBottom;
  labSurface [0].AnchorSide [akLeft].Control := Parent;
  labSurface [0].AnchorSide [akLeft].Side := asrRight;
  for index := 1 to 8 do begin
    labSurface [index].AnchorSide [akTop].Control := labSurface [index - 1];
    labSurface [index].AnchorSide [akTop].Side := asrBottom;
    labSurface [index].AnchorSide [akLeft].Control := Parent;
    labSurface [index].AnchorSide [akLeft].Side := asrRight;
  end;

Try to add there AnchorParallel:
 
labSurface [0].AnchorSide [akTop].Control := labSurfaceLocation;
labSurface [0].AnchorSide [akTop].Side := asrBottom;
labSurface [0].AnchorSide [akLeft].Control := Parent;
labSurface [0].AnchorSide [akLeft].Side := asrRight;
labSurface[0].AnchorParallel(akLeft, 0, labSurfaceLocation);
for index := 1 to 8 do begin
labSurface [index].AnchorSide [akTop].Control := labSurface [index - 1];
labSurface [index].AnchorSide [akTop].Side := asrBottom;
labSurface [index].AnchorSide [akLeft].Control := Parent;
labSurface [index].AnchorSide [akLeft].Side := asrRight;
labSurface [index].AnchorParallel(akLeft, 0, labSurfaceLocation);
end;                     
 

That worked. Thanks.

On Fri, 12 Feb 2021 at 14:06, Vojtěch Čihák via lazarus <

Update: Then I realized what had changed. I attempted to clean up some of my other dynamically created page tabs, and problems persisted. I ran some experiments, and determined the root problem. So this problem is more properly expressed as: When anchoring to Parent, border settings are ignored, regardless if they are set using a method (such as AnchorToNeighbour or AnchorParallel) or directly (by changing the BorderSpacing property). Is this a known bug? Or is it an undocumented feature? If the latter, how do I anchor to a parent in a manner that respects border spacing?

You probably do something wrong.
 
Here both
 
Button1.AnchorParallel(akLeft, 10, Form1);
 
or
 
Button1.BorderSpacing.Left:=10;
Button1.AnchorSide[akLeft].Control:=Form1;
Button1.Anchors:=[akLeft];
 
works well.
 
V .