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Sleeping in Delphi 1.0

Posted on 1998-03-06
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Last Modified: 2010-04-06
How do I make my application sleep for a number of seconds in Delphi 1.0?
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Question by:nickcadge
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ZifNab earned 50 total points
ID: 1360205
Hi nickcadge

Delay, pause, wait


How do you get your Delphi app to do nothing for a period of time?
A:
Uses
     ....
     Winprocs
     ....;

Procedure delay(millisecs : longint);   { delay for given milliseconds }
var
     endtime   : longint;
begin
     endtime := gettickcount + millisecs;
     while endtime - gettickcount < 0 do
          Application.ProcessMessages;
     end; { delay }

A:
procedure Wait;
var oldTime: LongInt;
begin
  oldTime := GetCurrentTime;
  repeat
   { whatever}
  until GetCurrentTime - oldTime >= yourDelay;
end;

To which I would add:

As current Windows does not have pre-emptive multi-tasking,
it's normally good event-handling manners to allow Windows
to jump in to the gap, so the { whatever } above should
usually read:

          Application.ProcessMessages;


A:
Procedure Delay(DTime : LongInt);
Var
  L : LongInt;
Begin
  L := GetTickCount;
  While (Abs(L-GetTickCount) < DTime) do;
End;

The usage is "Delay(1000'th of a second)", for example
Delay(5000) will wait 5 seconds.

Regards, Zif.
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