Title: Rounding Time, RoundToQuarter function
Question: Response to article request:
I need a fuction like RoundTime or so, that rounds a given timestamp to a quarter.
Answer:
function RoundToQuarter(dTime: TDateTime): TDateTime;
var
Hour, Min, Sec, MSec: Word;
begin
DecodeTime(dTime, Hour, Min, Sec, MSec);
if Sec 30 then
Min := Min + 1;
case Min of
0..7 : Min := 0;
8..22: Min := 15;
23..37: Min := 30;
38..52: Min := 45;
53..59: begin
Min := 0;
Hour := Hour + 1;
end;
end;
if Hour = 24 then
Hour := 0;
Sec := 0;
MSec := 0;
Result := EncodeTime(Hour, Min, Sec, MSec);
end;
// example of using the function
procedure TForm1.Button3Click(Sender: TObject);
begin
DateTimePicker1.Time := RoundToQuarter(DateTimePicker1.Time);
end;