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unit Main;
{$mode objfpc}{$H+}
interface
uses
Classes, ComCtrls, ExtCtrls, StdCtrls, SysUtils, FileUtil, Forms, Controls,
Graphics, Dialogs, Spin, TAGraph, TAMultiSeries, TASeries, TASources,
TAStyles;
type
{ TForm1 }
TForm1 = class(TForm)
ccsStacked: TCalculatedChartSource;
cbPercentage: TCheckBox;
cgShowStackLevels: TCheckGroup;
chField: TChart;
chFieldFieldSeries1: TFieldSeries;
chOHLC: TChart;
ChartStyles1: TChartStyles;
chOHLCOpenHighLowCloseSeries1: TOpenHighLowCloseSeries;
chStackedAreaSeries1: TAreaSeries;
chStackedLineSeries1: TLineSeries;
chWhiskers: TChart;
chStacked: TChart;
chBubble: TChart;
Chart1BubbleSeries1: TBubbleSeries;
chStackedBarSeries1: TBarSeries;
chWhiskersBoxAndWhiskerSeries1: TBoxAndWhiskerSeries;
edMaxVectorLength: TFloatSpinEdit;
Label1: TLabel;
lcsBubble: TListChartSource;
PageControl1: TPageControl;
Panel1: TPanel;
pnStackedControls: TPanel;
rbRadial: TRadioButton;
rbTangential: TRadioButton;
rgStackedSeries: TRadioGroup;
rcsStacked: TRandomChartSource;
tsField: TTabSheet;
tsOHLC: TTabSheet;
tsWhiskers: TTabSheet;
tsStacked: TTabSheet;
tsBubble: TTabSheet;
procedure cbPercentageChange(Sender: TObject);
procedure cgShowStackLevelsItemClick(Sender: TObject; Index: integer);
procedure edMaxVectorLengthChange(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FieldTypeChange(Sender: TObject);
procedure rgStackedSeriesClick(Sender: TObject);
private
procedure CreateFieldSeriesData;
end;
var
Form1: TForm1;
implementation
{$R *.lfm}
uses
TAChartUtils, TAGeometry;
{ TForm1 }
procedure TForm1.cbPercentageChange(Sender: TObject);
begin
ccsStacked.Percentage := cbPercentage.Checked;
end;
procedure TForm1.cgShowStackLevelsItemClick(Sender: TObject; Index: integer);
var
s: String;
i: Integer;
begin
Unused(Index);
s := '';
for i := 0 to cgShowStackLevels.Items.Count - 1 do begin
if cgShowStackLevels.Checked[i] then
s += Format('%d,', [i]);
ChartStyles1.Styles[i].RepeatCount := Ord(cgShowStackLevels.Checked[i]);
end;
ccsStacked.ReorderYList := s[1..Length(s) - 1];
end;
procedure TForm1.CreateFieldSeriesData;
const
NX = 21;
NY = 21;
MIN = -5.0;
MAX = +5.0;
var
i, j: Integer;
x, y, r: Double;
v: TDoublePoint;
begin
v := DoublePoint(2.0, 2.0);
r := sqrt(sqr(v.x) + sqr(v.y));
chFieldFieldSeries1.Clear;
for j := 0 to NY - 1 do begin
y := MIN + (MAX - MIN) / (NY - 1) * j;
for i := 0 to NX - 1 do begin
x := MIN + (MAX - MIN) / (NX - 1) * i;
r := sqr(x) + sqr(y);
if r > 0.1 then begin
if rbRadial.Checked then
v := DoublePoint(x/r, y/r) // radial vector
else
if rbTangential.Checked then
v := DoublePoint(y/r, -x/r); // tangential vector
chFieldFieldSeries1.AddVector(x, y, v.x, v.y);
end;
end;
end;
// Since the data points, in this example, have a distance of 0.5 units we
// can avoid overlapping of vectors if they are scaled to a length of 0.5
// units as well.
chFieldFieldSeries1.NormalizeVectors(0.5);
end;
procedure TForm1.edMaxVectorLengthChange(Sender: TObject);
begin
chFieldFieldSeries1.NormalizeVectors(EdMaxVectorLength.Value);
chField.Invalidate;
end;
procedure TForm1.FormCreate(Sender: TObject);
var
ylist: array [1..4] of Double;
i, j: Integer;
y, y0: Double;
begin
chWhiskersBoxAndWhiskerSeries1.ListSource.YCount := 5;
for i := 1 to 6 do begin
y := Random(80) + 10;
y0 := y;
for j := 1 to 4 do begin
y += Random(20) + 5;
ylist[j] := y;
end;
chWhiskersBoxAndWhiskerSeries1.AddXY(i, y0, ylist);
end;
chOHLCOpenHighLowCloseSeries1.ListSource.YCount := 4;
y := 50;
for i := 1 to 50 do begin
y += Random(80) / 10 - 4;
ylist[1] := y;
for j := 1 to 3 do begin
ylist[j] += Random(20) / 10 + 1;
ylist[j + 1] := ylist[j];
end;
if Random(3) = 1 then
Exchange(ylist[1], ylist[2]);
chOHLCOpenHighLowCloseSeries1.AddXY(i, y, ylist);
end;
CreateFieldSeriesData;
end;
procedure TForm1.FieldTypeChange(Sender: TObject);
begin
CreateFieldSeriesData;
end;
procedure TForm1.rgStackedSeriesClick(Sender: TObject);
var
i: Integer;
begin
i := rgStackedSeries.ItemIndex;
chStackedAreaSeries1.Active := i = 0;
chStackedBarSeries1.Active := i = 1;
chStackedLineSeries1.Active := i = 2;
end;
end.
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