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unit uplot;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, Graphics, types,
TAGraph, TATypes, TACustomSeries;
type
TPlotType = (ptSymbolsOnly, ptSegments, ptCubicSpline, ptBSpline,
ptLinearFit, ptSquareFit, ptArea, ptColumns, ptBars);
procedure PrepareChart(AChart: TChart;
xTitle, yTitle, AChartTitle, AChartFooter: String);
function Plot(AChart: TChart; x,y: TDoubleDynArray; ALegendText: String;
AColor: TColor; ASymbol: TSeriesPointerStyle; ALineStyle: TPenStyle;
APlotType: TPlotType; AShowSymbols: Boolean = false): TChartSeries;
implementation
uses
Math, LCLIntf,
TAFitUtils, TASeries, TAFuncSeries, TATools;
procedure PrepareChart(AChart: TChart;
xTitle, yTitle, AChartTitle, AChartFooter: String);
begin
AChart.BottomAxis.Title.Visible := xTitle <> '';
AChart.BottomAxis.Title.Caption := xTitle;
AChart.BottomAxis.Title.LabelFont.Style := [fsBold];
AChart.BottomAxis.Title.LabelFont.Size := 10;
AChart.BottomAxis.Grid.Color := $E0E0E0;
AChart.BottomAxis.Grid.Style := psSolid;
AChart.BottomAxis.AxisPen.Visible := true;
AChart.LeftAxis.Title.Visible := yTitle <> '';
AChart.LeftAxis.Title.Caption := yTitle;
AChart.LeftAxis.Title.LabelFont.Style := [fsBold];
AChart.LeftAxis.Title.LabelFont.Size := 10;
AChart.LeftAxis.Grid.Color := $E0E0E0;
AChart.LeftAxis.Grid.Style := psSolid;
AChart.LeftAxis.AxisPen.Visible := true;
AChart.Title.Visible := AChartTitle <> '';
AChart.Title.Text.Text := AChartTitle;
AChart.Title.Font.Style := [fsBold];
AChart.Title.Font.Size := 14;
AChart.Foot.Visible := AChartFooter <> '';
AChart.Foot.Text.Text := AChartFooter;
AChart.Foot.Font.Size := 8;
AChart.Foot.Alignment := taLeftJustify;
AChart.Legend.SymbolWidth := 40;
AChart.Legend.Frame.Color := clSilver;
AChart.Backcolor := clWhite;
AChart.Frame.Color := clSilver;
AChart.Visible := True;
end;
function Plot(AChart: TChart; x,y: TDoubleDynArray; ALegendText: String;
AColor: TColor; ASymbol: TSeriesPointerStyle; ALineStyle: TPenStyle;
APlotType: TPlotType; AShowSymbols: Boolean = false): TChartSeries;
var
i: Integer;
begin
case APlotType of
ptSymbolsOnly, ptSegments:
begin
Result := TLineSeries.Create(AChart.Owner);
with TLineSeries(Result) do
begin
ShowPoints := (APlotType = ptSymbolsOnly) or AShowSymbols;
ShowLines := (APlotType <> ptSymbolsOnly);
LinePen.Style := ALineStyle;
SeriesColor := AColor;
Pointer.Brush.Color := AColor;
Pointer.Pen.Color := AColor;
Pointer.Style := ASymbol;
end;
end;
ptCubicSpline:
begin
Result := TCubicSplineSeries.create(AChart.Owner);
with TCubicSplineSeries(Result) do
begin
Pen.Color := AColor;
Pen.Style := ALineStyle;
Pointer.Brush.Color := AColor;
Pointer.Pen.Color := AColor;
Pointer.Style := ASymbol;
Pointer.Visible := AShowSymbols;
end;
end;
ptBSpline:
begin
Result := TBSplineSeries.Create(AChart.Owner);
with TBSplineSeries(Result) do
begin
Pen.Color := AColor;
Pen.Style := ALineStyle;
Pointer.Brush.Color := AColor;
Pointer.Pen.Color := AColor;
Pointer.Style := ASymbol;
Pointer.Visible := AShowSymbols;
end;
end;
ptLinearFit, ptSquareFit:
begin
Result := TFitSeries.Create(AChart.Owner);
with TFitSeries(Result) do
begin
Pen.Color := AColor;
Pen.Style := ALineStyle;
if APlotType = ptLinearfit then
begin
FitEquation := feLinear;
Title := 'linear fit to ' + ALegendText;
end else
begin
FitEquation := fePolynomial;
ParamCount := 3; // parabolic fit needs 3 parameters
Title := 'parabolic fit to ' + ALegendText;
end;
Pointer.Brush.Color := AColor;
Pointer.Pen.Color := AColor;
Pointer.Style := ASymbol;
Pointer.Visible := AShowSymbols;
end;
end;
ptArea:
begin
Result := TAreaSeries.Create(AChart.Owner);
with TAreaSeries(Result) do
begin
SeriesColor := AColor;
AreaContourPen.Color := AColor;
AreaLinesPen.Color := AColor;
end;
end;
ptColumns, ptBars:
begin
Result := TBarSeries.Create(AChart.Owner);
with TBarSeries(Result) do
begin
BarBrush.Color := AColor;
BarPen.Color := AColor;
BarWidthStyle := bwPercentMin;
if APlotType = ptBars then begin
AxisIndexX := AChart.LeftAxis.Index;
AxisIndexY := AChart.BottomAxis.Index;
end else begin
AxisIndexX := AChart.BottomAxis.Index;
AxisIndexY := AChart.LeftAxis.Index;
end;
end;
end;
end;
Result.Title := ALegendText;
if Result is TBasicPointSeries then
with TBasicPointSeries(Result) do
for i:=0 to Min(High(x), High(y)) do
AddXY(x[i], y[i]);
AChart.AddSeries(Result);
AChart.Legend.Visible := AChart.SeriesCount > 1;
// Paint new series in front of the others
Result.ZPosition := AChart.SeriesCount;
end;
end.
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