Problem mit Buttons OnMouseEnter. Alle Buttons gläntzern

[DeddyH]

Da muss man etwas weiter ausholen:

Delphi-Quellcode:

unit bla;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Buttons;

type

  TBitBtn = class(Buttons.TBitBtn)
  private
    FOnMouseEnter: TNotifyEvent;
    FOnMouseLeave: TNotifyEvent;
    procedure CMMOUSEENTER(var Msg: TMessage); message CM_MOUSEENTER;
    procedure CMMOUSELEAVE(var Msg: TMessage); message CM_MOUSELEAVE;
  public
    constructor Create(aOwner: TComponent); override;
    property OnMouseEnter: TNotifyEvent read FOnMouseEnter write FOnMouseEnter;
    property OnMouseLeave: TNotifyEvent read FOnMouseLeave write FOnMouseLeave;
  end;

  TForm1 = class(TForm)
    btn1: TBitBtn;
    btn2: TBitBtn;
    btn3: TBitBtn;
    procedure FormCreate(Sender: TObject);
    procedure DoOnEnter(Sender: TObject);
    procedure DoOnLeave(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

{ TBitBtn }

procedure TBitBtn.CMMOUSEENTER(var Msg: TMessage);
begin
  inherited;
  if Assigned(FOnMouseEnter) then
    FOnMouseEnter(Self);
end;

procedure TBitBtn.CMMOUSELEAVE(var Msg: TMessage);
begin
  inherited;
  if Assigned(FOnMouseLeave) then
    FOnMouseLeave(Self);
end;

constructor TBitBtn.Create(aOwner: TComponent);
begin
  inherited;
  FOnMouseEnter := nil;
  FOnMouseLeave := nil;
end;

procedure TForm1.DoOnEnter(Sender: TObject);
begin
  (Sender as TBitBtn).Font.Style := (Sender as TBitBtn).Font.Style + [fsBold];
end;

procedure TForm1.DoOnLeave(Sender: TObject);
begin
  (Sender as TBitBtn).Font.Style := (Sender as TBitBtn).Font.Style - [fsBold];
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  btn2.OnMouseEnter := DoOnEnter;
  btn2.OnMouseLeave := DoOnLeave;
end;

end.

Hier werden die beiden definierten Events nur für btn2 zugewiesen.