Nachkomme von TCustomControl bekommt keinen Focus

[guidobrose]

Hallo,

ich habe eine Klasse erzeugt, die ein Nachkomme von TCustomControl ist und damit beim Anklicken auch den Fokus bekommen sollte. Soweit richtig, oder? Anscheinend bekommt meine Komponente jedoch den Fokus nicht, da ein, auf dem selben Panel, vorhandenes TEdit den Fokus nicht verliert (erkennbar am blinkenden Cursor im Edit). Was läuft da verkehrt?

Delphi-Quellcode:

  TXTCheckBox = class(TCustomControl)
  private
    PFState: TCheckBoxState;
    FEnabled: Boolean;
    function GetChecked: Boolean;
    procedure SetChecked(Value: Boolean);
  protected
    procedure Paint; override;
    procedure Toggle; virtual;
    procedure Click; override;
  public
    Caption: TCaption;
    constructor Create(AOwner: TComponent; AParent: TWinControl; ATop:Integer);Reintroduce;
    property State: TCheckBoxState read PFState;
  published
    property Checked: Boolean read GetChecked write SetChecked;
    property Enabled: Boolean read FEnabled write FEnabled default True;
    property OnClick;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDrag;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnEnter;
    property OnExit;
    property OnKeyPress;
    property OnKeyDown;
    property OnKeyUp;
  end;

constructor TXTCheckBox.Create(AOwner: TComponent; AParent: TWinControl; ATop:Integer);
begin
  inherited Create(AOwner);
  Parent:=AParent;
  Top:=ATop;
  Left:=5;
  ControlStyle := [csCaptureMouse, csClickEvents, csDesignInteractive];
  FEnabled := True;
  Width := 117;
  Height := 17;
end;

procedure TXTCheckBox.Paint;
var
   R:TRect;
begin
  with Canvas do
  begin
//Linie und Beschriftung
    Pen.Color:=clXTControlBorder;
    Pen.Width:=1;
    MoveTo(0,Height-2);
    LineTo(Width-16,Height-2);
    Brush.Color:=Color;
    TextOut(2,1,Caption);
//Rechteck
    R.Top:=0;
    R.Left:=Width-16;
    R.Bottom:=16;
    R.Right:=Width;
    Brush.Color:=Color;
    FillRect(R);
    Rectangle(R);
//Checked
    if PFState=cbChecked then
    begin
      Pixels[R.Left+4,R.Top+4]:=clBlack;
      Pixels[R.Left+5,R.Top+5]:=clBlack;
      Pixels[R.Left+6,R.Top+6]:=clBlack;
      Pixels[R.Left+7,R.Top+7]:=clBlack;
      Pixels[R.Left+8,R.Top+8]:=clBlack;
      Pixels[R.Left+9,R.Top+9]:=clBlack;
      Pixels[R.Left+10,R.Top+10]:=clBlack;
      Pixels[R.Left+11,R.Top+11]:=clBlack;
      Pixels[R.Left+4,R.Top+11]:=clBlack;
      Pixels[R.Left+5,R.Top+10]:=clBlack;
      Pixels[R.Left+6,R.Top+9]:=clBlack;
      Pixels[R.Left+7,R.Top+8]:=clBlack;
      Pixels[R.Left+8,R.Top+7]:=clBlack;
      Pixels[R.Left+9,R.Top+6]:=clBlack;
      Pixels[R.Left+10,R.Top+5]:=clBlack;
      Pixels[R.Left+11,R.Top+4]:=clBlack;
    end;
  end;
end;


function TXTCheckBox.GetChecked;
begin
  Result := not(State = cbUnChecked);
end;


procedure TXTCheckBox.SetChecked;
begin
  if Value then
    PFState := cbChecked
  else
    PFState := cbUnChecked;
  Paint;
end;


procedure TXTCheckBox.Toggle;
begin
  Checked := not Checked;
end;


procedure TXTCheckBox.Click;
begin
  if FEnabled then Toggle;
  inherited Click;
end;

Guido