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Pascal/Delphi Source File  |  2001-09-10  |  1.2 KB  |  51 lines
  1. unit Legend_Scroll;
  2.  
  3. interface
  4.  
  5. uses
  6.   Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  7.   Base, ExtCtrls, TeeProcs, TeEngine, Chart, StdCtrls, TeeTools, Series;
  8.  
  9. type
  10.   TLegendScroll = class(TBaseForm)
  11.     Series1: TLineSeries;
  12.     ChartTool1: TColorLineTool;
  13.     ScrollBar1: TScrollBar;
  14.     Label1: TLabel;
  15.     Label2: TLabel;
  16.     procedure FormCreate(Sender: TObject);
  17.     procedure ScrollBar1Change(Sender: TObject);
  18.     procedure ChartTool1EndDragLine(Sender: TColorLineTool);
  19.   private
  20.     { Private declarations }
  21.   public
  22.     { Public declarations }
  23.   end;
  24.  
  25. implementation
  26.  
  27. {$R *.DFM}
  28.  
  29. procedure TLegendScroll.FormCreate(Sender: TObject);
  30. begin
  31.   inherited;
  32.   Series1.FillSampleValues(100);
  33.   ScrollBar1.Max:=Series1.Count-1;
  34. end;
  35.  
  36. procedure TLegendScroll.ScrollBar1Change(Sender: TObject);
  37. begin
  38.   Chart1.Legend.FirstValue:=ScrollBar1.Position;
  39.   ChartTool1.Value:=ScrollBar1.Position;
  40.   Label2.Caption:=IntToStr(Chart1.Legend.FirstValue);
  41. end;
  42.  
  43. procedure TLegendScroll.ChartTool1EndDragLine(Sender: TColorLineTool);
  44. begin
  45.   ScrollBar1Change(Self);
  46. end;
  47.  
  48. initialization
  49.   RegisterClass(TLegendScroll);
  50. end.
  51.