TCustomControl descendant not resizeable in Designer

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howardpc:
I have a TCustomControl component which parents a TWincontrol and a TLabel. It autosizes via an overridden CalculatePreferredSize, behaving as I want when instantiated in code.
However, when installed on the component palette and dropped on a form it is selectable, but cannot be resized. It presumably uses the default Lazarus component editor.
Any ideas how to get it to resize in the Designer?

wp:
Just to make sure: AutoSize is off when you attempt to resize the control?

How did you position the two controls to each other? Using anchoring is sometimes tricky and can lead to locked situations. In these cases, usage of ChildSizing is easier.

The attached quick-and-dirty unit combines a TLabel and a TEdit, and here resizing works correctly when AutoSize is false:

--- Code: Pascal [+][-]window.onload = function(){var x1 = document.getElementById("main_content_section"); if (x1) { var x = document.getElementsByClassName("geshi");for (var i = 0; i < x.length; i++) { x[i].style.maxHeight='none'; x[i].style.height = Math.min(x[i].clientHeight+15,306)+'px'; x[i].style.resize = "vertical";}};} ---unit combined; {$mode objfpc}{$H+} interface uses Classes, SysUtils, Controls, StdCtrls; type TCombinedEdit = class(TCustomControl) private FLabel: TLabel; FEdit: TEdit; function GetCaption: String; function GetText: String; procedure SetCaption(const AValue: String); procedure SetText(const AValue: String); protected procedure CalculatePreferredSize(var PreferredWidth, PreferredHeight: integer; WithThemeSpace: Boolean); override; public constructor Create(AOwner: TComponent); override; published property Caption: String read GetCaption write SetCaption; property Text: String read GetText write SetText; property AutoSize default true; end; procedure Register; implementation procedure Register;begin RegisterComponents('Misc', [TCombinedEdit]);end; constructor TCombinedEdit.Create(AOwner: TComponent);begin inherited; FLabel := TLabel.Create(self); FLabel.Parent := self; FLabel.BorderSpacing.Bottom := 2; FLabel.WordWrap := true; FLabel.AutoSize := true; FLabel.Caption := 'Label'; FEdit := TEdit.Create(self); FEdit.Parent := self; Width := 200; with ChildSizing do begin ControlsPerLine := 1; EnlargeHorizontal := crsHomogenousChildResize; Layout := cclLeftToRightThenTopToBottom; VerticalSpacing := 2; end; AutoSize := true;end; procedure TCombinedEdit.CalculatePreferredSize( var PreferredWidth, PreferredHeight: integer; WithThemeSpace: Boolean); begin PreferredHeight := FLabel.Top + FLabel.Height + FLabel.BorderSpacing.Bottom + FEdit.Height; PreferredWidth := 0;end; function TCombinedEdit.GetCaption: String;begin Result := FLabel.Caption;end; function TCombinedEdit.GetText: String;begin Result := FEdit.Text;end; procedure TCombinedEdit.SetCaption(const AValue: String);begin FLabel.Caption := AValue; Invalidate;end; procedure TCombinedEdit.SetText(const AValue: String);begin FEdit.Text := AValue; Invalidate;end; end.

howardpc:
Thanks, wp. You've put me on the right track with using childsizing rather than anchoring.
I'll share the outcome in due course, I hope.

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