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- unit Chart_ScrollBar;
-
- interface
-
- uses
- Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
- Base, TeEngine, Series, StdCtrls, TeeScroB, ExtCtrls, TeeProcs, Chart;
-
- type
- TChartScrollBarForm = class(TBaseForm)
- ChartScrollBar1: TChartScrollBar;
- Series1: TFastLineSeries;
- Button1: TButton;
- Button2: TButton;
- procedure FormCreate(Sender: TObject);
- procedure Button1Click(Sender: TObject);
- procedure Button2Click(Sender: TObject);
- procedure ChartScrollBar1Change(Sender: TObject);
- private
- { Private declarations }
- public
- { Public declarations }
- end;
-
- implementation
-
- {$R *.DFM}
-
- procedure TChartScrollBarForm.FormCreate(Sender: TObject);
- begin
- inherited;
- Series1.FillSampleValues(1000);
-
- { show the first 100 points... }
- Chart1.BottomAxis.SetMinMax(0,99);
-
- { adjust the ScrollBar }
- ChartScrollBar1.RecalcPosition;
- end;
-
- procedure TChartScrollBarForm.Button1Click(Sender: TObject);
- begin
- ChartScrollBar1.Position:=ChartScrollBar1.Max; { go to end }
- end;
-
- procedure TChartScrollBarForm.Button2Click(Sender: TObject);
- begin
- ChartScrollBar1.Position:=ChartScrollBar1.Min; { go to begin }
- end;
-
- procedure TChartScrollBarForm.ChartScrollBar1Change(Sender: TObject);
- begin
- { enable / disable the "go to begin" and "go to end" buttons... }
- Button1.Enabled:=ChartScrollBar1.Position < ChartScrollBar1.Max;
- Button2.Enabled:=ChartScrollBar1.Position > ChartScrollBar1.Min;
- end;
-
- initialization
- RegisterClass(TChartScrollBarForm);
- end.
-