Are true dashed series possible in TeeChart?
I am trying to represent several data channels on TChart to show data outages. According to the plan each series should contain multiple ranges. Each range represents one dash on the chart and is built only with two points: start point and end point, to speed up chart drawing.
I didn't find interrupted line series, so I built my example with multiple FastLineSeries on the line, setting their colors by hand:
unit BCLMain;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, VclTee.TeeGDIPlus, VCLTee.TeEngine,
Vcl.ExtCtrls, VCLTee.TeeProcs, VCLTee.Chart, VCLTee.Series;
type
TForm1 = class(TForm)
Chart1: TChart;
procedure FormShow(Sender: TObject);
private
procedure _fillSeries(serIndex: Integer);
public
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.FormShow(Sender: TObject);
var
i: Integer;
begin
Chart1.ClearChart();
Chart1.View3D := False;
for i := 0 to 4 do _fillSeries(i);
end;
procedure TForm1._fillSeries(serIndex: Integer);
const
serc: array[0..4] of TColor = (clRed, clGreen, clBlue, clYellow, clFuchsia);
var
i, r: Integer;
ser: TFastLineSeries;
begin
for i := 0 to 4 do begin
ser := TFastLineSeries.Create(Chart1);
ser.Color := serc[serIndex];
ser.Pen.Width := 5;
Chart1.AddSeries(ser);
r := Random(20);
ser.AddXY(i*10+r, serIndex);
ser.AddXY((i+1)*10-1+r, serIndex);
end;
end;
end.
The problem here is that dashes in the line are not interpreted as a single series: they could not be hidden/shown at once and are represented as multiple items in legend.
How to make true interrupted series?
If it is not possible, then how to join pieces of a single line in the legend? (In the future I would like to show/hide each line by clicking a corresponding checkbox in the legend).
