Steema Central

Could the ability to choose to which axis (horizontal or vertical) the lines from the series points are dropped to be selectable ? Currently there is a line drawn from each series point to both the horizontal and the vertical axis. The option to only draw to either of them could be useful.

Also, ability to place the marks to the side of the series points instead of above them, especialy when the line would have been specified to only be drawn to the vertical axis. In those cases, the line is a horizontal line and hence having the marks appear to its side instead of above the points makes sense. If the line is only drawn to the vertical axis and the bottom axis is inverted, then the marks should be placed towards the right of the points, in the same manner as what happens when a horizontal line series has its bottom axis inverted.

procedure TForm1.FormCreate(Sender: TObject);
var
  i: Integer;
  APosition:TSeriesMarkPosition;
begin
  Series1.FillSampleValues();
  Chart1.Draw();

  APosition:=TSeriesMarkPosition.Create;
  try
    for i:=0 to Series1.Count-1 do
    begin
      APosition.Custom:=True;
      APosition.LeftTop.X:=Series1.Marks.Positions[i].LeftTop.X;
      APosition.LeftTop.Y:=Series1.Marks.Positions[i].LeftTop.Y-35;
      Series1.Marks.Positions[i]:=APosition;
    end;
  finally
      APosition.Free;
  end;
end;

Also, could the lines of the line point series be individually colored ?

Your code for custom positioning marks does not result in certain properties of the marks being copied, such as frame or arrow color. Thus these items do not show.

Also, the mark seems to be lower right justified instead of lower center since if its position in not changed, it appears to the left of the data value point.