Colors of the rainbow

Comments

• Ozan K. BAYRAM Istanbul

  March 2010 edited 8:49PM

  after you removed # you can use this method.
  

  function HexToInt(HexNum: string): LongInt;
  begin
     Result:=StrToInt('$' + HexNum);
  end;
  
• Ozan K. BAYRAM Istanbul

  March 2010 edited March 2010

  ok... hex to int works great but there is a problem with the color convertion...
  
  if your color is #AABBCC then you need to convert this as $00CCBBAA...
  
  Now i'm using these methods to achive that goal... Any suggestion would be appreciated...
  

  FUNCTION Power(X,Y:Word):LongInt;
  VAR Temp,Teller : LongInt;
  BEGIN
    TEMP:=1;
  
    FOR Teller:=1 TO Y DO
    begin
         TEMP:=TEMP*X;
    end;
    result:=Temp;
  END; { Power }
  
  
  FUNCTION Hex2Dec(Hex:STRING):LongInt;
  VAR   T1,T2,DecimalValue: LongInt;
        Error:Boolean;
  BEGIN
    Error:=False;
    T1:=0;T2:=0;DecimalValue:=0;
    FOR T1:=1 TO LENGTH(Hex) DO
    BEGIN
     T2:=Length(Hex)-T1;
     CASE Hex[T1] OF
     '0'  : DecimalValue:=DecimalValue+0;
     '1'  : DecimalValue:=DecimalValue+Power(16,T2);
     '2'  : DecimalValue:=DecimalValue+2*Power(16,T2);
     '3'  : DecimalValue:=DecimalValue+3*Power(16,T2);
     '4'  : DecimalValue:=DecimalValue+4*Power(16,T2);
     '5'  : DecimalValue:=DecimalValue+5*Power(16,T2);
     '6'  : DecimalValue:=DecimalValue+6*Power(16,T2);
     '7'  : DecimalValue:=DecimalValue+7*Power(16,T2);
     '8'  : DecimalValue:=DecimalValue+8*Power(16,T2);
     '9'  : DecimalValue:=DecimalValue+9*Power(16,T2);
     'A','a' : DecimalValue:=DecimalValue+10*Power(16,T2);
     'B','b' : DecimalValue:=DecimalValue+11*Power(16,T2);
     'C','c' : DecimalValue:=DecimalValue+12*Power(16,T2);
     'D','d' : DecimalValue:=DecimalValue+13*Power(16,T2);
     'E','e' : DecimalValue:=DecimalValue+14*Power(16,T2);
     'F','f' : DecimalValue:=DecimalValue+15*Power(16,T2);
     ELSE Error:=True;
     END;
    END;
    result:=DecimalValue;
    IF Error THEN result:=0;
  END; { Hex2Dec }
  
  //The function is hex colour format convert to fast report format
  // '#ABCDEF' => $00EFCDAB       
  function ConvertColor(Color:string):longint;
  var part1,part2,part3,newhexcode:String;                                                             
  begin
       part3:=Copy(Color,2,2);
       part2:=Copy(Color,4,2);
       part1:=Copy(Color,6,2);
       newhexcode := part1 + part2 + part3;                                                                     
       Result := Hex2Dec(newhexcode);
  end;
  
• Celin Dion

  March 2011 edited March 2011

  Ozan K. BAYRAM wrote: »

  ok... hex to int works great but there is a problem with the color convertion...
  
  if your color is #AABBCC then you need to convert this as $00CCBBAA...
  
  Now i'm using these methods to achive that goal... Any suggestion would be appreciated...
  

  FUNCTION Power(X,Y:Word):LongInt;
  VAR Temp,Teller : LongInt;
  BEGIN
    TEMP:=1;
  
    FOR Teller:=1 TO Y DO
    begin
         TEMP:=TEMP*X;
    end;
    result:=Temp;
  END; { Power }
  
  
  FUNCTION Hex2Dec(Hex:STRING):LongInt;
  VAR   T1,T2,DecimalValue: LongInt;
        Error:Boolean;
  BEGIN
    Error:=False;
    T1:=0;T2:=0;DecimalValue:=0;
    FOR T1:=1 TO LENGTH(Hex) DO
    BEGIN
     T2:=Length(Hex)-T1;
     CASE Hex[T1] OF
     '0'  : DecimalValue:=DecimalValue+0;
     '1'  : DecimalValue:=DecimalValue+Power(16,T2);
     '2'  : DecimalValue:=DecimalValue+2*Power(16,T2);
     '3'  : DecimalValue:=DecimalValue+3*Power(16,T2);
     '4'  : DecimalValue:=DecimalValue+4*Power(16,T2);
     '5'  : DecimalValue:=DecimalValue+5*Power(16,T2);
     '6'  : DecimalValue:=DecimalValue+6*Power(16,T2);
     '7'  : DecimalValue:=DecimalValue+7*Power(16,T2);
     '8'  : DecimalValue:=DecimalValue+8*Power(16,T2);
     '9'  : DecimalValue:=DecimalValue+9*Power(16,T2);
     'A','a' : DecimalValue:=DecimalValue+10*Power(16,T2);
     'B','b' : DecimalValue:=DecimalValue+11*Power(16,T2);
     'C','c' : DecimalValue:=DecimalValue+12*Power(16,T2);
     'D','d' : DecimalValue:=DecimalValue+13*Power(16,T2);
     'E','e' : DecimalValue:=DecimalValue+14*Power(16,T2);
     'F','f' : DecimalValue:=DecimalValue+15*Power(16,T2);
     ELSE Error:=True;
     END;
    END;
    result:=DecimalValue;
    IF Error THEN result:=0;
  END; { Hex2Dec }
  
  //The function is hex colour format convert to fast report format
  // '#ABCDEF' => $00EFCDAB       
  function ConvertColor(Color:string):longint;
  var part1,part2,part3,newhexcode:String;                                                             
  begin
       part3:=Copy(Color,2,2);
       part2:=Copy(Color,4,2);
       part1:=Copy(Color,6,2);
       newhexcode := part1 + part2 + part3;                                                                     
       Result := Hex2Dec(newhexcode);
  end;
  

  
  
  
  
  Thanks you for the post.
  Hi guys, Im a newbie. Nice to join this forum.
  
  
  
  __________________
  
• JenningsV

  September 2012 edited 8:49PM

  Hey, Ozan!
  
  so did you finda solution?
  if you did, could you please pm me and tell what exactly you did?
  i'd really appreciate it, thank you in advance