TTimer.OnTimer Event

Occurs when a specified amount of time, determined by the Interval property, has passed.

Pascal

property OnTimer: TNotifyEvent;

C++

__property TNotifyEvent OnTimer;

Description

Write an OnTimer event handler to execute an action at regular intervals.

The Interval property of a timer determines how frequently the OnTimer event occurs. Each time the specified interval passes, the OnTimer event occurs.

C++ Examples:

Copy Code

/*
Place a TTimer object in the form and enter Timer1Timer in 
the OnTimer event.  Place other controls in the form and 
change the active control at runtime.  The following event 
handler responds to timer events by moving the active control
one pixel to the right every 100 miliseconds:
*/
void __fastcall TForm1::Timer1Timer(TObject *Sender)
{
  Timer1->Interval = 100;
  if (ActiveControl)
    ActiveControl->Left = ActiveControl->Left + 1;
}

Delphi Examples:

Copy Code

{
Place a TTimer object in the form and enter Timer1Timer in 
the OnTimer event.  Place other controls in the form and 
change the active control at runtime.  The following event 
handler responds to timer events by moving the active control
one pixel to the right every 100 miliseconds:
} 
procedure TForm1.Timer1Timer(Sender: TObject);
begin
  Timer1.Interval := 100;
  if ActiveControl <> nil then
    ActiveControl.Left := ActiveControl.Left + 1;
end;