Checking whetever Series1 exists? (TFastlineseries)

[Hallo_Thomas]

I make one Series1(TFastLineSeries) to the running time.
How i Can question, whethever this exists or not?(True/False)

[Narcís]

Hi Hallo_Thomas,

You can do something like this:

Code: Select all

  if Chart1.SeriesCount>0 then
    for i:=0 to Chart1.SeriesCount-1 do
      if (Chart1[i] is TFastLineSeries) then
      begin
        //Your code here
      end;

If this doesn't fit your needs could you please let us know what are you exactly trying to do?

[Hallo_Thomas]

I always delete the TFastLineSerie again and other series (also:TFastLineseries )draws in Chart1, I always get an error message after the Halt [x]: TFastlineseries are deleted in the Chart1
and

Code: Select all

if Chart1.SeriesCount>0 then 
    for i:=0 to Chart1.SeriesCount-1 do 
      if (Chart1[i] is TFastLineSeries) then 
      begin 
        //Your code here 
      end;

Code: Select all

Halt: Array [0..11]of TFastLineseries;

I get an error message if other TFastlineseries are there, but Halt [x] not.


The Code

Code: Select all

procedure TForm2.Chart1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
var z,tmp,i, tmpL,x1,y1 : Integer;
begin
  for z:=0 to 11 do
  begin
    //if  Form2.Halt[z].Count>0 Then
    begin
      With Chart1 do
      begin
        for x1 := Round(Form2.Halt[z].XValues[0]) to Round(Form2.Halt[z].XValues[1]) do     //    Series5.XValue[1]
          for y1 := 0-Form2.Halt[z].LinePen.Width div 2to Form2.Halt[z].LinePen.Width div 2 do
          begin
            If (Form2.Halt[z].Clicked(X+x1, Y+y1) <> -1) And (OnSeriesPoint = False) Then
            begin
              Canvas.Brush.Style := bsSolid;
              Canvas.Pen.Color := clBlack;
              Canvas.Brush.Color := clWhite;
              canvas.TextOut(x+10,y,FormatFloat('#.00',Form2.Halt[z].XScreenToValue(x))+','+FormatFloat('#.00',Series1.YScreenToValue(y)));
              OnSeriesPoint := True;
            end;
            If (Form2.Halt[z].Clicked(X+x1, Y+y1) = -1) And (OnSeriesPoint = True) Then
            OnSeriesPoint := False;
          end;
      end;
    end;
  end;
end;

[Narcís]

Hi Hallo_Thomas,

Sorry but I don't understand which is your exact problem. Could you please send us an example we can run "as-is" to reproduce the problem here? You can post your files at news://www.steema.net/steema.public.attachments newsgroups.

Thanks in advance.

[Hallo_Thomas]

Somehow do not create selves to send what about the Outlook for newsgroup.
Therefore publishes I call example here
P.S Problem is Button2Click with Chart1MouseDown

Code: Select all

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, TeEngine, TeeFunci, Series, ExtCtrls, TeeProcs, Chart, StdCtrls,math,
  DBChart, Buttons,csPerformance;

type
  TForm1 = class(TForm)
    Chart1: TChart;
    Button1: TButton;
    Label1: TLabel;
    Button2: TButton;
    procedure Button2Click(Sender: TObject);
    procedure FormShow(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Chart1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure Chart1MouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure FormCreate(Sender: TObject);

  private
    { Private-Deklarationen }
    Series1,Series2,Series3,Series4,Series5,Series6:TFastLineseries;
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;
    OnSeriesPoint:Boolean;
implementation

{$R *.dfm}




procedure TForm1.Button1Click(Sender: TObject);
var
 i      : Integer;
 y  : Double;
 MyX,MyY: TChartValues;
 Anzahl : Array Of Double;
 ID     : TTimerID;
 const l=10;
begin
//inherited;
  ID:=0;
  csPerformance.StartTimer(ID);
  Chart1.UndoZoom;
  Chart1.FreeAllSeries;
  Series6 := TFastLineSeries.Create(Form1.Chart1);Form1.Chart1.AddSeries(Series6);Series6.BeginUpdate;
  Series2 := TFastLineSeries.Create(Form1.Chart1);Form1.Chart1.AddSeries(Series2);Series2.BeginUpdate;
  Series1 := TFastLineSeries.Create(Form1.Chart1);Form1.Chart1.AddSeries(Series1);Series1.BeginUpdate;
  Series3 := TFastLineSeries.Create(Form1.Chart1);Form1.Chart1.AddSeries(Series3);Series3.BeginUpdate;
  Series4 := TFastLineSeries.Create(Form1.Chart1);Form1.Chart1.AddSeries(Series4);Series4.BeginUpdate;
  Series5 := TFastLineSeries.Create(Form1.Chart1);Form1.Chart1.AddSeries(Series5);Series5.BeginUpdate;
  Series6.DrawAllPoints:=False;
  Chart1.Axes.FastCalc:=True;
  SetLength(MyX,l); SetLength(MyY,l);
  for i:=0 to l-1 do
  Begin
    MyX[i]:=i;
    MyY[i]:=  random(5000)/100;
  end;
  with Series6 do
  begin
    xValues.Count:=l;
    XValues.Value:=MyX;
    yValues.Count:=l;
    yValues.Value:=Myy;
  end;
  Series6.LinePen.Width := 3;
  Series6.SeriesColor:=clred;

  Series3.AddXY(5,0);
  Series3.AddXY(5,50);
  Series3.SeriesColor:=clblack;
  Series3.LinePen.Width := 5;

  Series4.SeriesColor:=clblack;
  Series4.AddXY(25,0);
  Series4.AddXY(25,50);
  SetLength(Anzahl,25-5+1);
  Series4.LinePen.Width := 5;

  for i:=5 to 25 do Anzahl[i-5]:=Series6.YValue[i];
  y:=  MinValue(Anzahl);
  Series5.AddXY(25,y);
  Series5.AddXY(5,y);
  Series5.SeriesColor:=clnavy;
  Series5.LinePen.Width := 20;
  Series1.EndUpdate;Series2.EndUpdate; Series3.EndUpdate;Series4.EndUpdate;Series5.EndUpdate;
  //Label1.Caption:= (Format ('Hat %6.6f sekunden gedauert',[StopTimer(ID)]));
end;

procedure TForm1.FormShow(Sender: TObject);
begin
  randomize;
end;

procedure TForm1.Chart1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
var x1,y1,i : Integer;
begin
  if Chart1.SeriesCount>0 then
    for i:=0 to Chart1.SeriesCount-1 do
      if (Chart1[i] is TFastLineSeries) then
  With Chart1 do
  begin
    for x1 := 5 to 25 do
      for y1 := 0 to Series5.Count do
      begin
        If (Series5.Clicked(X+x1, Y+y1) <> -1) And (OnSeriesPoint = False) Then
        begin
         Canvas.Brush.Style := bsSolid;
         Canvas.Pen.Color := clBlack;
         Canvas.Brush.Color := clWhite;
         canvas.TextOut(x+10,y,FormatFloat('#.00',Series5.XScreenToValue(x))+','+FormatFloat('#.00',Series5.YScreenToValue(y)));
         OnSeriesPoint := True;
        end;
        If (Series6.Clicked(X+x1, Y+y1) = -1) And (OnSeriesPoint = True) Then
          OnSeriesPoint := False;
      end;
  end;
end;

procedure TForm1.Chart1MouseUp(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
 Chart1.Repaint;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Chart1.View3D := False;
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  MyX,MyY: TChartValues;
  i      : Integer;
  const l=10;
begin
  Chart1.UndoZoom;
  Chart1.FreeAllSeries;
  Series6 := TFastLineSeries.Create(Form1.Chart1);Form1.Chart1.AddSeries(Series6);Series6.BeginUpdate;
  Series6.DrawAllPoints:=False;
  Chart1.Axes.FastCalc:=True;
  SetLength(MyX,l); SetLength(MyY,l);
  for i:=0 to l-1 do
  Begin
    MyX[i]:=i;
    MyY[i]:=  random(5000)/100;
  end;
  with Series6 do
  begin
    xValues.Count:=l;
    XValues.Value:=MyX;
    yValues.Count:=l;
    yValues.Value:=Myy;
  end;
end;

[Hallo_Thomas]

I have found a code this one works. Does this go also with a one If query?

Code: Select all

if Form1.Series5 <>nil Then
  if Form1.Series5.Count >0 Then
  begin
  My Code
  end;