1 unit uMain;
  2 
  3 interface
  4 
  5 uses
  6   Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  7   Dialogs, RzButton, StdCtrls, RzEdit, IdBaseComponent, IdThreadComponent;
  8 
  9 type
 10   TMainFrm = class(TForm)
 11     IDTrd: TIdThreadComponent;
 12     mmMsg: TRzMemo;
 13     btnStart: TRzBitBtn;
 14     btnStop: TRzBitBtn;
 15     btnTerminal: TRzBitBtn;
 16     procedure btnStartClick(Sender: TObject);
 17     procedure IDTrdRun(Sender: TIdCustomThreadComponent);
 18     procedure IDTrdBeforeExecute(Sender: TIdCustomThreadComponent);
 19     procedure IDTrdAfterExecute(Sender: TIdCustomThreadComponent);
 20     procedure btnStopClick(Sender: TObject);
 21     procedure btnTerminalClick(Sender: TObject);
 22     procedure IDTrdAfterRun(Sender: TIdCustomThreadComponent);
 23     procedure IDTrdBeforeRun(Sender: TIdCustomThreadComponent);
 24     procedure IDTrdStopped(Sender: TIdCustomThreadComponent);
 25   private
 26     { Private declarations }
 27   public
 28     { Public declarations }
 29   end;
 30 
 31 var
 32   MainFrm: TMainFrm;
 33 
 34 implementation
 35 
 36 {$R *.dfm}
 37 
 38 procedure TMainFrm.btnStartClick(Sender: TObject);
 39 begin
 40   IDTrd.Active := True;
 41 end;
 42 
 43 procedure TMainFrm.IDTrdRun(Sender: TIdCustomThreadComponent);
 44 var
 45   I: Integer;
 46 begin
 47   for I := 1 to 100 do
 48   begin
 49     mmMsg.Lines.Add(IntToStr(I)); //模拟耗时操作
 50   end;
 51   //在线程里不可以直接操作界面控件，有时候控件被销毁了而线程还在运行，
 52   //此时就会报AV异常，
 53   //所以在TIdThreadComponent回调事件中有使用到控件的，必须添加控件是否为空判断
 54 end;
 55 
 56 procedure TMainFrm.IDTrdBeforeExecute(Sender: TIdCustomThreadComponent);
 57 begin
 58   if Assigned(mmMsg) then
 59   begin
 60     mmMsg.Lines.Add('Before Execute');
 61   end;
 62 end;
 63 
 64 procedure TMainFrm.IDTrdAfterExecute(Sender: TIdCustomThreadComponent);
 65 begin
 66   if Assigned(mmMsg) then
 67   begin
 68     mmMsg.Lines.Add('After Execute');
 69   end;
 70 end;
 71 
 72 procedure TMainFrm.btnStopClick(Sender: TObject);
 73 begin
 74   IDTrd.Stop;
 75 end;
 76 
 77 procedure TMainFrm.btnTerminalClick(Sender: TObject);
 78 begin
 79   IDTrd.Terminate;
 80 end;
 81 
 82 procedure TMainFrm.IDTrdAfterRun(Sender: TIdCustomThreadComponent);
 83 begin
 84   if Assigned(mmMsg) then
 85   begin
 86     mmMsg.Lines.Add('After Run');
 87   end;
 88 end;
 89 
 90 procedure TMainFrm.IDTrdBeforeRun(Sender: TIdCustomThreadComponent);
 91 begin
 92   if Assigned(mmMsg) then
 93   begin
 94     mmMsg.Lines.Add('Before Run');
 95   end;
 96 end;
 97 
 98 procedure TMainFrm.IDTrdStopped(Sender: TIdCustomThreadComponent);
 99 begin
100   if Assigned(mmMsg) then
101   begin
102     mmMsg.Lines.Add('On Stopped');
103   end;
104 end;
105 
106 end.