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unit main;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, FileUtil, TAGraph, TASeries, TASources, Forms, Controls,
Graphics, Dialogs, ExtCtrls, StdCtrls, TAChartAxisUtils, TAFuncSeries,
TATools, TADataTools;
type
{ TMainForm }
TMainForm = class(TForm)
BtnCopyToClipboard: TButton;
BtnSaveWMF: TButton;
BtnSaveSVG: TButton;
Chart: TChart;
CgHTML: TCheckGroup;
CbRTL: TCheckBox;
ChartTools: TChartToolset;
CbRotateXLabels: TCheckBox;
DistanceTool: TDataPointDistanceTool;
FitSeries: TFitSeries;
Label1: TLabel;
ListChartSource: TListChartSource;
DataSeries: TLineSeries;
BottomPanel: TPanel;
ListChartSource_Fit: TListChartSource;
procedure BtnCopyToClipboardClick(Sender: TObject);
procedure BtnSaveWMFClick(Sender: TObject);
procedure BtnSaveSVGClick(Sender: TObject);
procedure CbRotateXLabelsChange(Sender: TObject);
procedure CgHTMLItemClick(Sender: TObject; Index: integer);
procedure ChartAxisList1MarkToText(var AText: String; AMark: Double);
procedure CbRTLChange(Sender: TObject);
procedure DistanceToolGetDistanceText(ASender: TDataPointDistanceTool;
var AText: String);
procedure FitSeriesFitComplete(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
procedure CreateData;
public
end;
var
MainForm: TMainForm;
implementation
{$R *.lfm}
uses
TAChartUtils, {$IFDEF WINDOWS}TADrawerWMF,{$ENDIF} TADrawerSVG;
{ TMainForm }
procedure TMainForm.BtnCopyToClipboardClick(Sender: TObject);
begin
Chart.CopyToClipboardBitmap;
end;
procedure TMainForm.BtnSaveWMFClick(Sender: TObject);
begin
{$IFDEF WINDOWS}
with Chart do
Draw(TWindowsMetafileDrawer.Create('test.wmf'), Rect(0, 0, Width, Height));
ShowMessage('Chart saved to file "test.wmf"');
{$ENDIF}
end;
procedure TMainForm.CbRotateXLabelsChange(Sender: TObject);
begin
if CbRotateXLabels.Checked then
Chart.BottomAxis.Marks.LabelFont.Orientation := 450
else
Chart.BottomAxis.Marks.LabelFont.Orientation := 0;
end;
procedure TMainForm.BtnSaveSVGClick(Sender: TObject);
begin
Chart.SaveToSVGFile('test.svg');
ShowMessage('Chart saved to file "test.svg"');
end;
procedure TMainForm.CgHTMLItemClick(Sender: TObject; Index: integer);
var
tf: TChartTextFormat;
begin
if CgHTML.Checked[Index] then tf := tfNormal else tf := tfHTML;
case Index of
0: Chart.Title.TextFormat := tf;
1: Chart.Foot.TextFormat := tf;
2: Chart.Legend.TextFormat := tf;
3: DataSeries.Marks.TextFormat := tf;
4: Chart.BottomAxis.Marks.TextFormat := tf;
5: Chart.BottomAxis.Title.TextFormat := tf;
6: Chart.LeftAxis.Title.TextFormat := tf;
7: DistanceTool.Marks.TextFormat := tf;
end;
end;
procedure TMainForm.ChartAxisList1MarkToText(var AText: String; AMark: Double);
begin
AText := AText + '°';
end;
procedure TMainForm.CbRTLChange(Sender: TObject);
begin
if CbRTL.Checked then
Chart.BiDiMode := bdRightToLeft else
Chart.BiDiMode := bdLeftToRight;
end;
procedure TMainForm.CreateData;
const
N = 20;
MIN = 0;
MAX = 90;
OUTLIER_INDEX = 12;
var
i: Integer;
x, y: Double;
s: String;
begin
for i:=0 to N-1 do begin
x := MIN + (MAX - MIN) * i / (N-1) + 5*(random - 0.5);
if i = OUTLIER_INDEX then begin
y := 631;
s := 'Defective device!' + LineEnding + '(α = ' + FormatFloat('0.00', x) + '°)';
end else
begin
y := x*x / 10 + (random - 0.5) * 100;
s := '';
end;
ListChartSource.Add(x, y, s);
if i <> OUTLIER_INDEX then
ListChartSource_Fit.Add(x, y);
end;
DataSeries.Source := ListChartSource;
FitSeries.Source := ListChartSource_Fit;
end;
procedure TMainForm.DistanceToolGetDistanceText(
ASender: TDataPointDistanceTool; var AText: String);
begin
AText := 'Δα = ' + FormatFloat('0.00', ASender.Distance) + '°';
end;
procedure TMainForm.FitSeriesFitComplete(Sender: TObject);
var
p: Array of Double;
i: Integer;
s: String;
begin
SetLength(p, FitSeries.ParamCount);
for i:=0 to FitSeries.ParamCount-1 do
p[i] := FitSeries.Param[i];
s := FitSeries.EquationText.
x('α').
y('A').
NumFormat('%.2f').
DecimalSeparator('.').
Params(p).
Get;
FitSeries.Title := '<font color="blue">Fitted:</font> ' + s;
end;
procedure TMainForm.FormCreate(Sender: TObject);
begin
CreateData;
CgHTML.Checked[0] := Chart.Title.TextFormat = tfNormal;
CgHTML.Checked[1] := Chart.Foot.TextFormat = tfNormal;
CgHTML.Checked[2] := Chart.Legend.TextFormat = tfNormal;
CgHTML.Checked[3] := DataSeries.Marks.TextFormat = tfNormal;
CgHTML.Checked[4] := Chart.BottomAxis.Marks.TextFormat = tfNormal;
CgHTML.Checked[5] := Chart.BottomAxis.Title.TextFormat = tfNormal;
CgHTML.Checked[6] := Chart.LeftAxis.Title.TextFormat = tfNormal;
CgHTML.Checked[7] := DistanceTool.Marks.TextFormat = tfNormal;
{$IFDEF WINDOWS}
Chart.Foot.Text[1] := '<font name="Times New Roman" color="gray">' + Chart.Foot.Text[1] + '</font>';
{$ELSE}
BtnSaveWMF.Hide;
{$ENDIF}
end;
end.
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