Routine mit Namen aufrufen

[BadenPower]

Der Code funktioniert auch mit 2 Units.

Aber für was er das benötigt ist noch nicht offensichtlich.


Hier mal ein Beispiel mit 2 Units:

1. Unit mit 2 Buttons auf der Form

Delphi-Quellcode:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Hello_World(Sender: TObject);
  private
    procedure ExecuteRoutine(Instance: TObject; Name: string);
  public
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses
  unit2;

type
  TExecute = procedure of object;

procedure TForm1.Button1Click(Sender: TObject);
begin
  ExecuteRoutine(Form1, 'Hello_World');
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  ExecuteRoutine(Form2, 'Hello_World');
end;

procedure TForm1.ExecuteRoutine(Instance: TObject; Name: string);
var
  Routine: TMethod;
  Execute: TExecute;
begin
  Routine.Data := Pointer(Instance);
  // Returns the address of a published method.
  Routine.Code := Instance.MethodAddress(Name);
  if Routine.Code = nil then Exit;
  Execute := TExecute(Routine);
  Execute;
end;


procedure TForm1.Hello_World(Sender: TObject);
begin
  ShowMessage('Form1.Hello_World');
end;


end.

Und die 2. Unit

Delphi-Quellcode:

unit Unit2;

interface

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

type
  TForm2 = class(TForm)
    procedure Hello_World(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form2: TForm2;

implementation

{$R *.dfm}

procedure TForm2.Hello_World(Sender: TObject);
begin
  ShowMessage('Form2.Hello_World');
end;

end.