home *** CD-ROM | disk | FTP | other *** search
/ CD Actual Thematic 25: Programming / pc_actual_25.iso / Delphi / TeeChartPro / TeeChart5Delphi5Eval.exe / %MAINDIR% / Examples / Features / Area_Origin.pas < prev    next >
Encoding:
Pascal/Delphi Source File  |  2001-09-10  |  1.2 KB  |  56 lines
  1. unit Area_Origin;
  2.  
  3. interface
  4.  
  5. uses
  6.   Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  7.   Base, ComCtrls, StdCtrls, TeEngine, Series, ExtCtrls, TeeProcs, Chart;
  8.  
  9. type
  10.   TAreaOriginForm = class(TBaseForm)
  11.     Series1: TAreaSeries;
  12.     CBUseOrigin: TCheckBox;
  13.     Label1: TLabel;
  14.     EOrigin: TEdit;
  15.     UDOrigin: TUpDown;
  16.     procedure FormCreate(Sender: TObject);
  17.     procedure CBUseOriginClick(Sender: TObject);
  18.     procedure EOriginChange(Sender: TObject);
  19.   private
  20.     { Private declarations }
  21.   public
  22.     { Public declarations }
  23.   end;
  24.  
  25. implementation
  26.  
  27. {$R *.DFM}
  28.  
  29. procedure TAreaOriginForm.FormCreate(Sender: TObject);
  30. var tmp : Integer;
  31. begin
  32.   inherited;
  33.   Series1.FillSampleValues(20);
  34.  
  35.   { calc middle point as an example... }
  36.   With Series1.YValues do tmp:=Round((MaxValue+MinValue)/2.0);
  37.  
  38.   UDOrigin.Position:=tmp;
  39.   Series1.YOrigin:=tmp;
  40. end;
  41.  
  42. procedure TAreaOriginForm.CBUseOriginClick(Sender: TObject);
  43. begin
  44.   Series1.UseYOrigin:=CBUseOrigin.Checked;
  45.   Series1.YOrigin:=UDOrigin.Position;
  46. end;
  47.  
  48. procedure TAreaOriginForm.EOriginChange(Sender: TObject);
  49. begin
  50.   if Showing then Series1.YOrigin:=UDOrigin.Position
  51. end;
  52.  
  53. initialization
  54.   RegisterClass(TAreaOriginForm);
  55. end.
  56.