BeginUpdate/Endupdate at TChart level (not single series)

[Hans Hasenack]

Which allows me to to fill all series with data, and only after the endupdate call will recalculate dependant series and redraw the chart.

It's already there -> let me apologize? where?

[Narcís]

Hi Hans,

I'm afraid there are no such methods at TChart level. However, you could try using TChart's OnBeforeDraw and OnAfterDraw events.

[Hans Hasenack]

// HH This allows for an enormous optimization. Just call BeginUpdate before adding
// a lot of datapoints, and afterwards call EndUpdate
// All calculated series will be delayed until after adding all datapoints
procedure TCustomChart.BeginUpdate;
VAR i:integer;
begin
for i:=0 to SeriesList.Count-1 do
begin
SeriesList.BeginUpdate;
end;
end;

procedure TCustomChart.EndUpdate;
VAR i:integer;
begin
for i:=0 to SeriesList.Count-1 do
begin
SeriesList.EndUpdate;
end;
end;

[Narcís]

Hi Hans,

Thanks for your suggestion. I've also added it to the list to be reviewed for next releases.