random numbers

var
  test : boolean;
  num  : integer;
begin
  test := false;
  Randomize;
  while not test do
  begin
    num := round((random) * 100000);
    if (num >= 12000) and (num <= 32000) then test := true;
  end;
  timer4.interval:= num;
end;

procedure TForm1.UpdateTimeInterval;
begin
  Randomize;
  Timer4.Interval := 12000 + Random(32000);
end;

I hope this helps,

Stu.

ah hell  if you can do it...

pass parameters to the updatetimeinterval event as below..

procedure tform1.updatetimeinterval(offset,range,granularity:integer);
begin
  randomize;
  timer4.interval := offset + ((random(range div granularity)+1)* granularity);
end;

ex of use

updatetimeinterval(12000,20000,250);  will give a timerinterval of 12000 + 250 -> 20000 in increments of 250ms

or have application-wide or unit-wide variables declared as part of a initialization sequence at startup

offset#,
range#,
granularity# : integer;

you may have multiple timers with different rules so just stick in the appropriate timer's parameters as offset0, range0, and granularity0 for timer0, and so on...

procedure tform1.updatetime#interval;
begin
  randomize;
  timer#.interval := offset# + ((random(range# div granularity#)+1)* granularity#);
end;

replacing the # with timer #'s

Hi catbecks,

here is my version :-)

procedure TForm1.Timer1Timer(Sender: TObject);
begin
  TTimer(Sender).Interval := 12000 + Random(32000-12000);
  //
  // rest of your code here
  //
end;

initialization
  // to avoid of the same sequences on every programm start
  Randomize;
end.