frxchart.pas

这个是功能强大的报表软件

        Sort;

      for i := 0 to sl2.Count - 1 do
      begin
        if i < sl1.Count then v1 := sl1[i] else v1 := '';
        if i < sl2.Count then v2 := sl2[i] else v2 := '';
        if i < sl3.Count then v3 := sl3[i] else v3 := '';
        if i < sl4.Count then v4 := sl4[i] else v4 := '';
        if i < sl5.Count then v5 := sl5[i] else v5 := '';
        if i < sl6.Count then v6 := sl6[i] else v6 := '';
        Helper.AddValues(Series, v1, v2, v3, v4, v5, v6, FXType);
      end;
    end;

  finally
    Helper.Free;
    sl1.Free;
    sl2.Free;
    sl3.Free;
    sl4.Free;
    sl5.Free;
    sl6.Free;
  end;
end;



{ TfrxSeriesData }

constructor TfrxSeriesData.Create(Report: TfrxReport);
begin
  inherited Create(TfrxSeriesItem);
  FReport := Report;
end;

function TfrxSeriesData.Add: TfrxSeriesItem;
begin
  Result := TfrxSeriesItem(inherited Add);
end;

function TfrxSeriesData.GetSeries(Index: Integer): TfrxSeriesItem;
begin
  Result := TfrxSeriesItem(inherited Items[Index]);
end;


{ TfrxChartView }

constructor TfrxChartView.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  CreateChart;
  FSeriesData := TfrxSeriesData.Create(Report);

end;

destructor TfrxChartView.Destroy;
begin

  FChart.Free;
  inherited Destroy;
  FSeriesData.Free;
end;

class function TfrxChartView.GetDescription: String;
begin
  Result := frxResources.Get('obChart');
end;

procedure TfrxChartView.Notification(AComponent: TComponent; Operation: TOperation);
var
  i: Integer;
begin
  inherited;
  if Operation = opRemove then
  begin
    for i := 0 to FSeriesData.Count - 1 do
      if AComponent is TfrxDataSet then
      begin
        if FSeriesData[i].DataSet = AComponent then
          FSeriesData[i].DataSet := nil;
      end
      else if AComponent is TfrxBand then
      begin
        if FSeriesData[i].DataBand = AComponent then
          FSeriesData[i].DataBand := nil;
      end;
  end;
end;

class function TfrxChartView.GetChartClass: TChartClass;
begin
  Result := TChart;
end;

procedure TfrxChartView.CreateChart;
begin
  FChart := GetChartClass.Create(Self);
  with FChart do
  begin
    Color := clWhite;
    BevelInner := bvNone;
    BevelOuter := bvNone;
    Name := 'Chart';
    Frame.Visible := False;
    View3DOptions.Rotation := 0;
    Title.Text.Text := '';
  end;
end;

procedure TfrxChartView.DefineProperties(Filer: TFiler);
begin
  inherited;
  Filer.DefineBinaryProperty('Chart', ReadData, WriteData, True);
  Filer.DefineProperty('ChartElevation', ReadData1, WriteData1, True);
  Filer.DefineProperty('SeriesData', ReadData2, WriteData2, True);
end;

procedure TfrxChartView.ReadData(Stream: TStream);
begin
  FChart.Free;
  CreateChart;
  Stream.ReadComponent(FChart);
end;

procedure TfrxChartView.WriteData(Stream: TStream);
begin
  Stream.WriteComponent(FChart);
end;

procedure TfrxChartView.ReadData1(Reader: TReader);
begin
  FChart.View3DOptions.Elevation := Reader.ReadInteger;
end;

procedure TfrxChartView.WriteData1(Writer: TWriter);
begin
  Writer.WriteInteger(FChart.View3DOptions.Elevation);
end;

procedure TfrxChartView.ReadData2(Reader: TReader);
begin
  frxReadCollection(FSeriesData, Reader, Self);
end;

procedure TfrxChartView.WriteData2(Writer: TWriter);
begin
  frxWriteCollection(FSeriesData, Writer, Self);
end;

procedure TfrxChartView.FillChart;
var
  i: Integer;
begin
  for i := 0 to FSeriesData.Count - 1 do
    FSeriesData[i].FillSeries(FChart.Series[i]);
end;

procedure TfrxChartView.Draw(Canvas: TCanvas; ScaleX, ScaleY, OffsetX,
  OffsetY: Extended);
var
  EMF: TMetafile;
begin
  BeginDraw(Canvas, ScaleX, ScaleY, OffsetX, OffsetY);
  DrawBackground;

  FillChart;

  if Color = clTransparent then
    FChart.Color := clWhite else
    FChart.Color := Color;
  FChart.BufferedDisplay := True;
  EMF := FChart.TeeCreateMetafile(False, Rect(0, 0, Round(Width), Round(Height)));
  Canvas.StretchDraw(Rect(FX, FY, FX1, FY1), EMF);
  EMF.Free;

  DrawFrame;
end;

procedure TfrxChartView.AfterPrint;
var
  i: Integer;
begin
  for i := 0 to FSeriesData.Count - 1 do
    with FSeriesData[i] do
    begin
      Values1 := '';
      Values2 := '';
      Values3 := '';
      Values4 := '';
      Values5 := '';
      Values6 := '';
    end;
end;

procedure TfrxChartView.GetData;
var
  i: Integer;
begin
  inherited;
  for i := 0 to FSeriesData.Count - 1 do
    with FSeriesData[i] do
      if (DataType = dtDBData) and (DataSet <> nil) then
      begin
        Values1 := '';
        Values2 := '';
        Values3 := '';
        Values4 := '';
        Values5 := '';
        Values6 := '';

        DataSet.First;
        while not DataSet.Eof do
        begin
          if Source1 <> '' then
            Values1 := Values1 + ';' + VarToStr(Report.Calc(Source1));
          if Source2 <> '' then
            Values2 := Values2 + ';' + VarToStr(Report.Calc(Source2));
          if Source3 <> '' then
            Values3 := Values3 + ';' + VarToStr(Report.Calc(Source3));
          if Source4 <> '' then
            Values4 := Values4 + ';' + VarToStr(Report.Calc(Source4));
          if Source5 <> '' then
            Values5 := Values5 + ';' + VarToStr(Report.Calc(Source5));
          if Source6 <> '' then
            Values6 := Values6 + ';' + VarToStr(Report.Calc(Source6));
          DataSet.Next;
        end;
      end
      else if DataType = dtFixedData then
      begin
        Values1 := Source1;
        Values2 := Source2;
        Values3 := Source3;
        Values4 := Source4;
        Values5 := Source5;
        Values6 := Source6;
      end
end;

procedure TfrxChartView.BeforeStartReport;
var
  i: Integer;
begin
  for i := 0 to FSeriesData.Count - 1 do
    with FSeriesData[i] do
    begin
      Values1 := '';
      Values2 := '';
      Values3 := '';
      Values4 := '';
      Values5 := '';
      Values6 := '';
    end;
  Report.Engine.NotifyList.Add(Self);
end;

procedure TfrxChartView.OnNotify(Sender: TObject);
var
  i: Integer;
begin
  inherited;
  for i := 0 to FSeriesData.Count - 1 do
    with FSeriesData[i] do
      if (DataType = dtBandData) and (DataBand = Sender) then
      begin
        Report.CurObject := Self.Name;
        if Source1 <> '' then
          Values1 := Values1 + ';' + VarToStr(Report.Calc(Source1));
        if Source2 <> '' then
          Values2 := Values2 + ';' + VarToStr(Report.Calc(Source2));
        if Source3 <> '' then
          Values3 := Values3 + ';' + VarToStr(Report.Calc(Source3));
        if Source4 <> '' then
          Values4 := Values4 + ';' + VarToStr(Report.Calc(Source4));
        if Source5 <> '' then
          Values5 := Values5 + ';' + VarToStr(Report.Calc(Source5));
        if Source6 <> '' then
          Values6 := Values6 + ';' + VarToStr(Report.Calc(Source6));
      end;
end;

procedure TfrxChartView.AddSeries(Series: TfrxChartSeries);
var
  sc: TSeriesClass;
  s: TChartSeries;
  b: Boolean;

begin
  sc := frxChartSeries[Integer(Series)];
  s := TChartSeries(sc.NewInstance);
  s.Create(Chart);
  Chart.AddSeries(s);

  SeriesData.Add;


  with Chart do
  begin
    b := not (s is TPieSeries);
    View3DOptions.Orthogonal := b;
    AxisVisible := b;
    View3DWalls := b;
  end;
end;

procedure TfrxChartView.ClearSeries;
begin
  FChart.Free;
  CreateChart;
  SeriesData.Clear;
end;






initialization
{$IFNDEF TeeChartStd}
{$IFNDEF TeeChartStd7}
{$IFNDEF TeeChart4}
  RegisterTeeStandardSeries;
{$ENDIF}
{$ENDIF}
{$ENDIF}
  frxObjects.RegisterObject1(TfrxChartView, nil, '', '', 0, 25);

finalization
  frxObjects.UnRegister(TfrxChartView);

end.


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