lazarus-ccr/components/fpspreadsheet/examples/other/demo_recursive_calc.pas

58 lines
1.4 KiB
ObjectPascal

{ This demo is a test for recursive calculation of cells. The cell formulas
are constructed such that the first cell depends on the second, and the second
cell depends on the third one. Only the third cell contains a number.
Therefore calculation has to be done recursively until the independent third
cell is found. }
program demo_recursive_calc;
{$mode objfpc}{$H+}
uses
{$IFDEF UNIX}
{$IFDEF UseCThreads}
cthreads,
{$ENDIF}
{$ENDIF}
Classes, Math,
fpstypes, fpspreadsheet, fpsfunc, xlsbiff8;
var
workbook: TsWorkbook;
worksheet: TsWorksheet;
const
OutputFile='test_recursive.xls';
begin
writeln('Starting program.');
workbook := TsWorkbook.Create;
try
workbook.Options := workbook.Options + [boCalcBeforeSaving];
worksheet := workbook.AddWorksheet('Calc_test');
worksheet.WriteColWidth(0, 20);
// A1
worksheet.WriteUTF8Text(0, 0, '=B2+1');
// B1
worksheet.WriteFormula(0, 1, 'B2+1');
// A2
worksheet.WriteUTF8Text(1, 0, '=B3+1');
// B2
worksheet.WriteFormula(1, 1, 'B3+1');
// A3
worksheet.WriteUTF8Text(2, 0, '(not dependent)');
// B3
worksheet.WriteNumber(2, 1, 1);
workbook.WriteToFile(OutputFile, sfExcel8, true);
writeln('Finished.');
writeln;
writeln('Please open "'+OutputFile+'" in "fpsgrid".');
writeLn('It should show calculation results in cells B1 and B2.');
finally
workbook.Free;
end;
end.