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unit Unit1;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs, StdCtrls,
Buttons, delphicompat, LMessages, LCLType;
type
{ TMainForm }
TMainForm = class(TForm)
Button1: TButton;
KillGlobalTimerButton1: TButton;
SetGlobalTimerButton: TButton;
SetTimerDestroyButton: TButton;
SetTimer1Button: TButton;
SetTimer2Button: TButton;
SetTimer3Button: TButton;
KillTimer1Button: TButton;
KillTimer2Button: TButton;
KillTimer3Button: TButton;
SetTimer3bButton: TButton;
ListBox1: TListBox;
procedure Button1Click(Sender: TObject);
procedure KillGlobalTimerButton1Click(Sender: TObject);
procedure SetGlobalTimerButtonClick(Sender: TObject);
procedure SetTimer1ButtonClick(Sender: TObject);
procedure SetTimer2ButtonClick(Sender: TObject);
procedure SetTimer3ButtonClick(Sender: TObject);
procedure KillTimer1ButtonClick(Sender: TObject);
procedure KillTimer2ButtonClick(Sender: TObject);
procedure KillTimer3ButtonClick(Sender: TObject);
procedure SetTimer3bButtonClick(Sender: TObject);
procedure SetTimerDestroyButtonClick(Sender: TObject);
protected
procedure WMTimer(var Message: TLMTimer); message LM_TIMER;
private
FGlobalTimer: PtrUInt;
procedure TimerCallback(AId: PtrUInt);
procedure TimerCallbackGlobal(AId: PtrUInt);
procedure TimerCallbackOther(AId: PtrUInt);
{ private declarations }
public
{ public declarations }
end;
var
MainForm: TMainForm;
implementation
{$R *.lfm}
uses
strutils;
const
Timer1 = 1;
Timer2 = 2;
Timer3 = 3;
{ TMainForm }
procedure TMainForm.Button1Click(Sender: TObject);
begin
ListBox1.Clear;
end;
procedure TMainForm.KillGlobalTimerButton1Click(Sender: TObject);
begin
if FGlobalTimer <> 0 then
begin
KillTimer(0, FGlobalTimer);
FGlobalTimer := 0;
end;
end;
procedure TMainForm.SetGlobalTimerButtonClick(Sender: TObject);
begin
FGlobalTimer := SetTimer(0,FGlobalTimer,2000,@TimerCallbackGlobal);
end;
procedure TMainForm.SetTimer1ButtonClick(Sender: TObject);
begin
SetTimer(Handle,Timer1,1000,nil);
end;
procedure TMainForm.SetTimer2ButtonClick(Sender: TObject);
begin
SetTimer(Handle,Timer2,2000,nil);
end;
procedure TMainForm.SetTimer3ButtonClick(Sender: TObject);
begin
SetTimer(Handle,Timer3,3000,@TimerCallback);
end;
procedure TMainForm.KillTimer1ButtonClick(Sender: TObject);
begin
KillTimer(Handle,Timer1);
end;
procedure TMainForm.KillTimer2ButtonClick(Sender: TObject);
begin
KillTimer(Handle,Timer2);
end;
procedure TMainForm.KillTimer3ButtonClick(Sender: TObject);
begin
KillTimer(Handle,Timer3);
end;
procedure TMainForm.SetTimer3bButtonClick(Sender: TObject);
begin
SetTimer(Handle,Timer3,3000,@TimerCallbackOther);
end;
type
{ TMyButton }
TMyButton = class(TButton)
protected
procedure WMTimer(var Message: TLMTimer); message LM_TIMER;
end;
{ TMyButton }
procedure TMyButton.WMTimer(var Message: TLMTimer);
begin
MainForm.ListBox1.Items.Add('WMTimer - Released Button (Should Not Be Fired)');
end;
procedure TMainForm.SetTimerDestroyButtonClick(Sender: TObject);
var
Button: TButton;
begin
Button := TButton.Create(nil);
try
Button.Parent := Self;
Button.Visible := True;
SetTimer(Button.Handle, Timer3, 1000, nil);
finally
Button.Destroy;
end;
end;
procedure TMainForm.WMTimer(var Message: TLMTimer);
var
AStr: String;
begin
case Message.TimerID of
Timer1: AStr:='Timer1 called';
Timer2: AStr:='Timer2 called';
Timer3: AStr:='Timer3 called';
else
AStr:='TimerID not identified: '+IntToStr(Message.TimerID);
end;
ListBox1.Items.Add('WMTimer - '+AStr);
end;
procedure TMainForm.TimerCallback(AId: PtrUInt);
begin
ListBox1.Items.Add('TimerCallback called');
end;
procedure TMainForm.TimerCallbackGlobal(AId: PtrUInt);
begin
ListBox1.Items.Add('TimerCallbackGlobal called' + IfThen(AId <> FGlobalTimer, ' ERROR: ID <> GlobalTimer'));
end;
procedure TMainForm.TimerCallbackOther(AId: PtrUInt);
begin
ListBox1.Items.Add('TimerCallbackOther called');
end;
end.
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