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unit Main;
{$mode objfpc}{$H+}
interface
uses
Classes, ExtCtrls, Spin, StdCtrls, SysUtils, FileUtil, Forms, Controls,
Graphics, Dialogs, TACustomSource, TAGraph, TASeries, TASources,
TAAnimatedSource;
type
TForm1 = class(TForm)
btnStartStop: TButton;
Chart1: TChart;
Chart1BarSeries1: TBarSeries;
lblSkipped: TLabel;
ListChartSource1: TListChartSource;
Panel1: TPanel;
rgMethod: TRadioGroup;
seTime: TSpinEdit;
procedure btnStartStopClick(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure rgMethodClick(Sender: TObject);
procedure seTimeChange(Sender: TObject);
private
FAnimatedSource: TCustomAnimatedChartSource;
procedure OnGetItem(
ASource: TCustomAnimatedChartSource;
AIndex: Integer; var AItem: TChartDataItem);
procedure OnStop(ASource: TCustomAnimatedChartSource);
end;
var
Form1: TForm1;
implementation
{$R *.lfm}
uses
Math;
{ TForm1 }
procedure TForm1.btnStartStopClick(Sender: TObject);
begin
if FAnimatedSource.IsAnimating then
FAnimatedSource.Stop
else
FAnimatedSource.Start;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
FAnimatedSource := TCustomAnimatedChartSource.Create(Self);
FAnimatedSource.Origin := ListChartSource1;
FAnimatedSource.AnimationInterval := 30;
FAnimatedSource.OnGetItem := @OnGetItem;
FAnimatedSource.OnStop := @OnStop;
seTimeChange(nil);
Chart1BarSeries1.Source := FAnimatedSource;
FAnimatedSource.Start;
end;
procedure TForm1.OnGetItem(
ASource: TCustomAnimatedChartSource;
AIndex: Integer; var AItem: TChartDataItem);
begin
case rgMethod.ItemIndex of
0: AItem.Y *= ASource.Progress;
1:
if ASource.Count * ASource.Progress < AIndex then
AItem.Y := 0;
2:
case Sign(Trunc(ASource.Count * ASource.Progress) - AIndex) of
0: AItem.Y *= Frac(ASource.Count * ASource.Progress);
-1: AItem.Y := 0;
end;
end;
end;
procedure TForm1.OnStop(ASource: TCustomAnimatedChartSource);
begin
lblSkipped.Caption := Format('Skipped frames: %d', [ASource.SkippedFramesCount]);
end;
procedure TForm1.rgMethodClick(Sender: TObject);
begin
FAnimatedSource.Start;
end;
procedure TForm1.seTimeChange(Sender: TObject);
begin
FAnimatedSource.AnimationTime := seTime.Value;
end;
end.
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