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unit Utils;
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interface
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uses
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Controls,
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Graphics //TColor
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;
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type
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TStrArray = array of string;
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TUtils = class
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class function split(input: string; schar: Char; s: Integer): string;
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class function Explode(var a: TStrArray; Border, S: string): Integer;
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class procedure RoundCornerOf(Control: TWinControl);
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class function BarCodeValid (ACode: string): boolean;
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class function CheckSumModulo10(const data:string):string;
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class function TColorToHex(Color : TColor) : string;
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class function HexToTColor(sColor : string) : TColor;
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end;
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implementation
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uses StrUtils,
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Types, //TRect ,
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Windows,
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Messages,
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SysUtils //IntToStr etc
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;
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{
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VERY fast split function
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this function returns part of a string based on
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constant defineable delimiters, such as ";". So
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SPLIT('this is a test ',' ',3) = 'is' or
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SPLIT('data;another;yet;again;more;',';',4) = 'yet'
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Split function shifts index integer by two to
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be compatible with commonly used PD split function
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gpl 2004 / Juhani Suhonen
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}
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class function TUtils.split(input: string; schar: Char; s: Integer): string;
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var
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c: array of Integer;
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b, t: Integer;
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begin
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Dec(s, 2); // for compatibility with very old & slow split function
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t := 0; // variable T needs to be initialized...
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setlength(c, Length(input));
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for b := 0 to pred(High(c)) do
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begin
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c[b + 1] := posex(schar, input, succ(c[b]));
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// BREAK LOOP if posex looped (position before previous)
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// or wanted position reached..
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if (c[b + 1] < c[b]) or (s < t) then break
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else
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Inc(t);
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end;
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Result := Copy(input, succ(c[s]), pred(c[s + 1] - c[s]));
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end;
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class function TUtils.Explode(var a: TStrArray; Border, S: string): Integer;
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var
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S2: string;
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begin
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Result := 0;
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S2 := S + Border;
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repeat
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SetLength(A, Length(A) + 1);
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a[Result] := Copy(S2, 0,Pos(Border, S2) - 1);
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Delete(S2, 1,Length(a[Result] + Border));
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Inc(Result);
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until S2 = '';
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end;
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class procedure TUtils.RoundCornerOf(Control: TWinControl);
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var
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R: TRect;
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Rgn: HRGN;
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begin
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with Control do
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begin
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R := ClientRect;
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// rgn := CreateRoundRectRgn(R.Left, R.Top, R.Right, R.Bottom, 20, 20) ;
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rgn := CreateRoundRectRgn(R.Left, R.Top, R.Right, R.Bottom, 25, 25) ;
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// rgn := CreateRoundRectRgn(R.Left, R.Top, R.Right, R.Bottom, 30, 30) ;
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Perform(EM_GETRECT, 0, lParam(@r)) ;
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InflateRect(r, - 4, - 4) ;
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Perform(EM_SETRECTNP, 0, lParam(@r)) ;
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SetWindowRgn(Handle, rgn, True) ;
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Invalidate;
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end;
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end;
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class function TUtils.BarCodeValid (ACode: string): boolean;
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var
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I: integer;
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SumOdd, SumEven: integer;
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ADigit, AChecksumDigit: integer;
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begin
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SumOdd := 0;
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SumEven := 0;
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for I := 1 to (Length (ACode) - 1) do begin
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ADigit := StrToIntDef (ACode [I], 0);
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if (I MOD 2 = 0) then begin
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SumEven := SumEven + ADigit;
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end else begin
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SumOdd := SumOdd + ADigit;
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end; {if}
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end; {for}
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AChecksumDigit := StrToIntDef (ACode [Length (ACode)], 0);
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Result := ((SumOdd*3 + SumEven + AChecksumDigit) MOD 10 = 0);
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end; {--BarCodeValid--}
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{ used for EAN 8/13 }
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class function TUtils.CheckSumModulo10(const data:string):string;
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var i,fak,sum : Integer;
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begin
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sum := 0;
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fak := Length(data);
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for i:=1 to Length(data) do
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begin
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if (fak mod 2) = 0 then
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sum := sum + (StrToInt(data[i])*1)
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else
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sum := sum + (StrToInt(data[i])*3);
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dec(fak);
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end;
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if (sum mod 10) = 0 then
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result := data+'0'
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else
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result := data+IntToStr(10-(sum mod 10));
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end;
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class function TUtils.TColorToHex(Color : TColor) : string;
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begin
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Result :=
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IntToHex(GetRValue(Color), 2) +
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IntToHex(GetGValue(Color), 2) +
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IntToHex(GetBValue(Color), 2) ;
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end;
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class function TUtils.HexToTColor(sColor : string) : TColor;
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begin
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Result :=
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RGB(
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StrToInt('$'+Copy(sColor, 1, 2)),
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StrToInt('$'+Copy(sColor, 3, 2)),
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StrToInt('$'+Copy(sColor, 5, 2))
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) ;
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end;
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end.
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