Flackern bei eigenem Komponenten verhindern...

[Weazy]

Wie kann ich verhindern das mein eigener VCL Komponent flackert (z.b wenn align auf alclient gesetzt ist kommt es zum flackern beim resizen der form) Hier ein beispielcode:

Delphi-Quellcode:

unit VistaBar;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls,VisualCommon;

type
  TVistaBar = class(TGraphicControl)
  private
    FOnPaint: TNotifyEvent;
    property Canvas;
  protected
    procedure Paint; override;
  public
    constructor Create(AOwner: TComponent); override;
  published
    property Align;
    property Anchors;
    property DragCursor;
    property Visible;
    property OnClick;
    property OnDblClick;
    property OnMouseActivate;
    property OnMouseDown;
    property OnMouseEnter;
    property OnMouseLeave;
    property OnMouseMove;
    property OnMouseUp;
  end;

procedure Register;

implementation

procedure Register;
begin
  RegisterComponents('visual soft', [TVistaBar]);
end;

constructor TVistaBar.Create(AOwner: TComponent);
var
i:integer;
begin
  inherited Create(AOwner);
  Width := 100;
  Height := 20;
end;

procedure TVistaBar.Paint;
var
r:trect;
begin
  r.left:=0;
  r.Right:=width;
  r.Top:=0;
  r.Bottom:=height;
    with Canvas do
    begin
     canvas.Brush.Color:=clred;
     canvas.Pen.Color:=clblack;
     canvas.FillRect(r);
    end;

  if Assigned(FOnPaint) then FOnPaint(Self);
end;

end.

Danke für eure Antworten!