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InftForm.pas
Package: delphi.rar [view]
Upload User: fh681027
Upload Date: 2022-07-23
Package Size: 1959k
Code Size: 2k
Category:
Delphi VCL
Development Platform:
Delphi
- unit InftForm;
- interface
- uses
- Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
- StdCtrls;
- type
- TForm1 = class(TForm)
- ListBox1: TListBox;
- btnRunner: TButton;
- btnAthlete: TButton;
- btnClear: TButton;
- btnMyJumper: TButton;
- procedure btnRunnerClick(Sender: TObject);
- procedure btnAthleteClick(Sender: TObject);
- procedure btnClearClick(Sender: TObject);
- procedure btnMyJumperClick(Sender: TObject);
- public
- procedure Log (str: string);
- end;
- var
- Form1: TForm1;
- implementation
- {$R *.DFM}
- uses
- WalkIntf;
- procedure TForm1.btnRunnerClick(Sender: TObject);
- var
- W1: IWalker;
- begin
- W1 := TRunner.Create;
- Log ('TRunner.Create');
- Log (W1.Run);
- Log (W1.Walk);
- Log (W1.Run);
- Log ('');
- end;
- procedure TForm1.Log(str: string);
- begin
- ListBox1.Items.Add (str);
- end;
- procedure TForm1.btnAthleteClick(Sender: TObject);
- var
- W1: IWalker;
- J1: IJumper;
- begin
- W1 := TAthlete.Create;
- Log ('TAthlete.Create');
- Log (W1.Run);
- Log (W1.Walk);
- Log (W1.Run);
- Log ((W1 as IJumper).Jump);
- // see Chapter 4 (System unit) for a description
- // of the Supports RTL function
- if Supports (w1, IJumper) then
- begin
- J1 := W1 as IJumper;
- Log (J1.Walk);
- end;
- Log ('');
- end;
- procedure TForm1.btnClearClick(Sender: TObject);
- begin
- ListBox1.Clear;
- end;
- procedure TForm1.btnMyJumperClick(Sender: TObject);
- var
- J1: IJumper;
- begin
- J1 := TMyJumper.Create as IJumper;
- Log ('TMyJumper.Create');
- Log (J1.Walk);
- Log (J1.Jump);
- Log (J1.Walk);
- Log ('');
- end;
- end.