Created
April 26, 2019 07:03
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InitializedTimedTask
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program TimedTask; | |
uses | |
Vcl.Forms, | |
TimedTaskMain in 'TimedTaskMain.pas' {Form89}; | |
{$R *.res} | |
begin | |
Application.Initialize; | |
Application.MainFormOnTaskbar := True; | |
Application.CreateForm(TForm89, Form89); | |
Application.Run; | |
end. |
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object Form89: TForm89 | |
Left = 0 | |
Top = 0 | |
Caption = 'Form89' | |
ClientHeight = 336 | |
ClientWidth = 635 | |
Color = clBtnFace | |
Font.Charset = DEFAULT_CHARSET | |
Font.Color = clWindowText | |
Font.Height = -11 | |
Font.Name = 'Tahoma' | |
Font.Style = [] | |
OldCreateOrder = False | |
OnDestroy = FormDestroy | |
PixelsPerInch = 96 | |
TextHeight = 13 | |
object Button1: TButton | |
Left = 24 | |
Top = 64 | |
Width = 75 | |
Height = 25 | |
Caption = 'Button1' | |
TabOrder = 0 | |
OnClick = Button1Click | |
end | |
object SpinEdit1: TSpinEdit | |
Left = 24 | |
Top = 24 | |
Width = 121 | |
Height = 22 | |
MaxValue = 0 | |
MinValue = 0 | |
TabOrder = 1 | |
Value = 0 | |
end | |
object ListBox1: TListBox | |
Left = 184 | |
Top = 24 | |
Width = 425 | |
Height = 289 | |
ItemHeight = 13 | |
TabOrder = 2 | |
end | |
end |
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unit TimedTaskMain; | |
interface | |
uses | |
Winapi.Windows, Winapi.Messages, | |
System.SysUtils, System.Variants, System.Classes, | |
Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.Samples.Spin, | |
OtlTask, OtlParallel; | |
type | |
TWorker = class | |
strict private | |
FValue: integer; | |
public | |
constructor Create(startAt: integer); | |
procedure Tick; | |
property Value: integer read FValue; | |
end; | |
TForm89 = class(TForm) | |
Button1: TButton; | |
SpinEdit1: TSpinEdit; | |
ListBox1: TListBox; | |
procedure FormDestroy(Sender: TObject); | |
procedure Button1Click(Sender: TObject); | |
strict private | |
FTimedTask: IOmniTimedTask; | |
FWorker: TWorker; | |
private | |
public | |
end; | |
var | |
Form89: TForm89; | |
implementation | |
{$R *.dfm} | |
procedure TForm89.FormDestroy(Sender: TObject); | |
begin | |
if assigned(FTimedTask) then begin | |
FTimedTask.Terminate(INFINITE); | |
FTimedTask := nil; | |
end; | |
FreeAndNil(FWorker); | |
end; | |
procedure TForm89.Button1Click(Sender: TObject); | |
begin | |
Button1.Enabled := false; | |
FWorker := TWorker.Create(SpinEdit1.Value); | |
FTimedTask := | |
Parallel.TimedTask | |
.Every(1000) | |
.Execute( | |
procedure (const task: IOmniTask) | |
var | |
value: integer; | |
begin | |
FWorker.Tick; | |
value := FWorker.Value; | |
task.Invoke( | |
procedure | |
begin | |
ListBox1.Items.Add(value.ToString); | |
end); | |
end); | |
FTimedTask.Start; | |
end; | |
constructor TWorker.Create(startAt: integer); | |
begin | |
inherited Create; | |
FValue := startAt; | |
end; | |
procedure TWorker.Tick; | |
begin | |
Inc(FValue); | |
end; | |
end. |
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