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// Upgraded to Delphi 2009: Sebastian Zierer
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(* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is TurboPower SysTools
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*
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* The Initial Developer of the Original Code is
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* TurboPower Software
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*
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* Portions created by the Initial Developer are Copyright (C) 1996-2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* ***** END LICENSE BLOCK ***** *)
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{*********************************************************}
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{* SysTools: StBarPN.pas 4.04 *}
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{*********************************************************}
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{* SysTools: PostNet Bar Code component *}
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{*********************************************************}
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{$I StDefine.inc}
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unit StBarPN;
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interface
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uses
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Windows, Classes, ClipBrd, Controls, Graphics, Messages, SysUtils,
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StBase, StConst, StStrL;
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type
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TStPNBarCodeDims = packed record
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PixPerBar : Longint;
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PixPerSpace : Longint;
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ShortBarHeight : Longint;
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TallBarHeight : Longint;
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Width : Longint;
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Height : Longint;
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end;
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TStPNBarCodeRes = packed record
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XRes : Longint;
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YRes : Longint;
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end;
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TStPNBarCode = class(TGraphicControl)
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protected {private}
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{property variables}
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FPostalCode : string;
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FCheckNumber : Integer;
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{internal variables}
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pnbcDisplayDims : TStPNBarCodeDims;
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pnbcDefRes : TStPNBarCodeRes;
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{property methods}
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function GetVersion : string;
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procedure SetPostalCode(Value : String);
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procedure SetVersion (const v : string);
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{internal methods}
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function DrawTallBar(C : TCanvas;
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Dims : TStPNBarCodeDims;
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XPos : Integer;
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AddSpace : Boolean) : Longint;
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function DrawShortBar(C : TCanvas;
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Dims : TStPNBarCodeDims;
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XPos : Integer;
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AddSpace : Boolean) : Longint;
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function DrawNumber(C : TCanvas;
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Dims : TStPNBarCodeDims;
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Value : Integer;
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XPos : Longint;
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FrontGuard : Boolean;
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EndGuard : Boolean) : Longint;
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procedure DrawBarCode(C : TCanvas; Dims : TStPNBarCodeDims);
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procedure SetCheckNumber;
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(*
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procedure CMTextChanged(var Msg : TMessage);
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message CM_TEXTCHANGED;
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*)
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protected
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procedure Loaded; override;
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procedure Paint; override;
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public
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constructor Create(AOwner : TComponent); override;
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procedure ComputeSizes(C : TCanvas;
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Res : TStPNBarCodeRes;
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var Dims : TStPNBarCodeDims);
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procedure CopyToClipboard;
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procedure PaintToCanvas(ACanvas : TCanvas; Position : TPoint);
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procedure PaintToDC(DC : hDC; Position : TPoint);
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procedure PaintToPrinterCanvas(ACanvas : TCanvas; Position : TPoint);
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procedure PaintToPrinterDC(DC : hDC; Position : TPoint);
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procedure SaveToFile(ACanvas : TCanvas; const FileName : string);
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procedure SaveToFileRes(Res : TStPNBarCodeRes; const FileName : string);
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published
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{properties}
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property Cursor;
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property Enabled;
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property Hint;
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property ParentShowHint;
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property ShowHint;
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property Visible;
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property PostalCode : string read FPostalCode write SetPostalCode;
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property Version : string read GetVersion write SetVersion stored False;
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{events}
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property OnClick;
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property OnDblClick;
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property OnMouseDown;
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property OnMouseMove;
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property OnMouseUp;
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end;
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implementation
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{*** TStPNBarCode ***}
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function TStPNBarCode.GetVersion : string;
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begin
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Result := StVersionStr;
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end;
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procedure TStPNBarCode.SetVersion(const v : string);
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begin
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end;
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constructor TStPNBarCode.Create(AOwner : TComponent);
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begin
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inherited Create(AOwner);
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{defaults}
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pnbcDefRes.XRes := 0;
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pnbcDefRes.YRes := 0;
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{set arbitrary values for height/width so that component automatically resizes}
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Height := 10;
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Width := 10;
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PostalCode := '12345';
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SetCheckNumber;
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end;
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procedure TStPNBarCode.Loaded;
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begin
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inherited Loaded;
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Invalidate;
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end;
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procedure TStPNBarCode.Paint;
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begin
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ComputeSizes(Canvas, pnbcDefRes, pnbcDisplayDims);
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Height := pnbcDisplayDims.Height;
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Width := pnbcDisplayDims.Width;
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DrawBarCode(Canvas, pnbcDisplayDims);
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end;
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procedure TStPNBarCode.SetCheckNumber;
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var
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I : Longint;
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begin
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if (Length(TrimL(FPostalCode)) < 5) then Exit;
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FCheckNumber := 0;
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for I := 1 to Length(FPostalCode) do
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FCheckNumber := FCheckNumber + StrToInt(FPostalCode[I]);
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I := FCheckNumber mod 10;
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if (I > 0) then
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FCheckNumber := 10 - I
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else
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FCheckNumber := 0;
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end;
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procedure TStPNBarCode.SetPostalCode(Value : string);
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var
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I : Integer;
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Local : string;
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begin
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if (csLoading in ComponentState) then Exit;
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Local := TrimL(Value);
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{strip non-numerics}
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I := 1;
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repeat
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if not (Local[I] in ['0'..'9']) then
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System.Delete(Local, I, 1)
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else
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Inc(I);
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until (I > Length(Local));
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{ looks like a valid Postal Code?}
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if (Local <> FPostalCode) then begin
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if (Length(Local) in [5, 9, 11]) then begin
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FPostalCode := Local;
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SetCheckNumber;
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Invalidate;
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end else
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RaiseStError(EStPNBarCodeError, stscInvalidLength);
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end; { else it's the same code, don't bother updating }
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end;
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function TStPNBarCode.DrawTallBar(C : TCanvas;
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Dims : TStPNBarCodeDims;
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XPos : Integer;
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AddSpace : Boolean) : Longint;
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var
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YPos : Longint;
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begin
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Result := XPos;
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YPos := Dims.Height - 5 - Dims.TallBarHeight;
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C.Rectangle(XPos, YPos, XPos+Dims.PixPerBar, YPos+Dims.TallBarHeight);
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Result := Result + Dims.PixPerBar;
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if (AddSpace) then
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Inc(Result, Dims.PixPerSpace);
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end;
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function TStPNBarCode.DrawShortBar(C : TCanvas;
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Dims : TStPNBarCodeDims;
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XPos : Integer;
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AddSpace : Boolean) : Longint;
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var
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YPos : Longint;
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begin
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Result := XPos;
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YPos := Dims.Height - 5 - Dims.ShortBarHeight;
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C.Rectangle(XPos, YPos, XPos+Dims.PixPerBar, YPos+Dims.ShortBarHeight);
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Result := Result + Dims.PixPerBar;
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if (AddSpace) then
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Inc(Result, Dims.PixPerSpace);
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end;
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function TStPNBarCode.DrawNumber(C : TCanvas;
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Dims : TStPNBarCodeDims;
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Value : Integer;
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XPos : Longint;
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FrontGuard : Boolean;
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EndGuard : Boolean) : Longint;
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begin
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Result := XPos;
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if (FrontGuard) then
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Result := DrawTallBar(C, Dims, Result, True);
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case Value of
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0 : begin
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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end;
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1 : begin
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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end;
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2 : begin
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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end;
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3 : begin
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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end;
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4 : begin
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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end;
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5 : begin
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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end;
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6 : begin
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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end;
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7 : begin
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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end;
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8 : begin
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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end;
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9 : begin
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawTallBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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Result := DrawShortBar(C, Dims, Result, True);
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end;
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end;
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if (EndGuard) then
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Result := DrawTallBar(C, Dims, Result, False);
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end;
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procedure TStPNBarCode.ComputeSizes(C : TCanvas;
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Res : TStPNBarCodeRes;
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var Dims : TStPNBarCodeDims);
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var
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PPIX,
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PPIY : Longint;
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begin
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if csLoading in ComponentState then
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Exit;
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{get resolution}
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if ((Res.XRes > 0) and (Res.YRes > 0)) then begin
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PPIX := Res.XRes;
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PPIY := Res.YRes;
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end else begin
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PPIX := GetDeviceCaps(C.Handle, LOGPIXELSX);
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PPIY := GetDeviceCaps(C.Handle, LOGPIXELSY);
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end;
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{PN bar is 0.015" to 0.025" - use mid value}
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{add 1 since Canvas.Rectangle draws 1 pixel less than Width}
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Dims.PixPerBar := Round(PPIX * 0.017) + 1;
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{CenterLine distance is 0.0416" to 0.0500". Space is that minus width of bar}
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{In all cases the Pitch must be 22 +/-2 bars/Inch where a bar is the bar and}
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{the trailing space}
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{add 1 since Canvas.Rectangle draws 1 pixel less than Width}
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Dims.PixPerSpace := Round(0.0475 * PPIX) - Dims.PixPerBar + 1;
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{max height of short bar is 0.050" +/-0.010". To allow for 75dpi, go a}
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{little less}
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{add 1 since Canvas.Rectangle draws 1 pixel less than Height}
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Dims.ShortBarHeight := Round(0.047 * PPIY) + 1;
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{max height of tall bar is 0.125" +/-0.010". To allow for 75dpi, go a}
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{little less}
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{add 1 since Canvas.Rectangle draws 1 pixel less than Height}
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Dims.TallBarHeight := Round(0.122 * PPIY) + 1;
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{Total Width of Canvas =
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FrontGuardBar + Space +
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(NumberChars + CheckChar) * (5 * (PixelsPerBar + PixelsPerSpace)) +
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(EndBar w/o Space) +
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5 pixels left/right margin
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}
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Dims.Width :=
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(Dims.PixPerBar + Dims.PixPerSpace) +
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(Length(PostalCode) + 1) * (5 * (Dims.PixPerBar + Dims.PixPerSpace)) +
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Dims.PixPerBar + 10;
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{Height = Height of tall bar + 3 pixel top/bottom margin}
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Dims.Height := Dims.TallBarHeight + 3;
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end;
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procedure TStPNBarCode.DrawBarCode(C : TCanvas; Dims : TStPNBarCodeDims);
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var
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I,
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XPos : Longint;
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begin
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if csLoading in ComponentState then
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Exit;
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C.Brush.Color := clBlack;
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C.Brush.Style := bsSolid;
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{Draw the Code}
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XPos := 5;
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XPos := DrawNumber(C, Dims, StrToInt(PostalCode[1]), XPos, True, False);
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for I := 2 to Length(PostalCode) do
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XPos := DrawNumber(C, Dims, StrToInt(PostalCode[I]), XPos, False, False);
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DrawNumber(C, Dims, FCheckNumber, XPos, False, True);
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end;
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(*
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procedure TStPNBarCode.CMTextChanged(var Msg : TMessage);
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begin
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SetCheckNumber;
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Invalidate;
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end;
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*)
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442 |
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procedure TStPNBarCode.CopyToClipboard;
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var
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MetaFile : TMetaFile;
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MetaFileCanvas : TMetaFileCanvas;
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Bitmap : TBitmap;
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Dims : TStPNBarCodeDims;
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begin
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Clipboard.Clear;
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Clipboard.Open;
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try
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{bitmap}
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Bitmap := TBitmap.Create;
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try
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ComputeSizes(Bitmap.Canvas, pnbcDefRes, Dims);
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Bitmap.Width := Dims.Width;
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Bitmap.Height := Dims.Height;
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DrawBarCode(Bitmap.Canvas, Dims);
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Clipboard.Assign(Bitmap);
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461 |
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{metafile}
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MetaFile := TMetaFile.Create;
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try
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MetaFileCanvas := TMetaFileCanvas.Create(MetaFile, 0);
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try
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MetaFile.Enhanced := True;
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MetaFile.Width := ClientWidth;
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MetaFile.Height := ClientHeight;
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MetaFileCanvas.Draw(0, 0, Bitmap);
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finally
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MetaFileCanvas.Free;
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end;
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Clipboard.Assign(MetaFile);
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finally
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MetaFile.Free;
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end;
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478 |
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finally
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Bitmap.Free;
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end
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finally
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Clipboard.Close;
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end;
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end;
|
486 |
|
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|
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|
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procedure TStPNBarCode.PaintToDC(DC : hDC; Position : TPoint);
|
490 |
var
|
491 |
Bmp : TBitmap;
|
492 |
ACanvas : TCanvas;
|
493 |
Dims : TStPNBarCodeDims;
|
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R1,
|
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R2 : TRect;
|
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begin
|
497 |
ACanvas := TCanvas.Create;
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ACanvas.Handle := DC;
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499 |
Bmp := TBitmap.Create;
|
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try
|
501 |
ComputeSizes(ACanvas, pnbcDefRes, Dims);
|
502 |
Bmp.Height := Dims.Height;
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Bmp.Width := Dims.Width;
|
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R1 := Rect(0, 0, Dims.Width, Dims.Height);
|
505 |
R2 := Rect(Position.X, Position.Y,
|
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Dims.Width + Position.X,
|
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Dims.Height + Position.Y);
|
508 |
|
509 |
DrawBarCode(Bmp.Canvas, Dims);
|
510 |
ACanvas.CopyRect(R2, Bmp.Canvas, R1);
|
511 |
finally
|
512 |
Bmp.Free;
|
513 |
ACanvas.Free;
|
514 |
end;
|
515 |
end;
|
516 |
|
517 |
|
518 |
|
519 |
procedure TStPNBarCode.PaintToCanvas(ACanvas : TCanvas; Position : TPoint);
|
520 |
begin
|
521 |
PaintToDC(ACanvas.Handle, Position);
|
522 |
end;
|
523 |
|
524 |
|
525 |
|
526 |
procedure TStPNBarCode.PaintToPrinterCanvas(ACanvas : TCanvas;
|
527 |
Position : TPoint);
|
528 |
begin
|
529 |
PaintToPrinterDC(ACanvas.Handle, Position);
|
530 |
end;
|
531 |
|
532 |
|
533 |
|
534 |
procedure TStPNBarCode.PaintToPrinterDC(DC : hDC; Position : TPoint);
|
535 |
var
|
536 |
Bmp : TBitmap;
|
537 |
ACanvas : TCanvas;
|
538 |
Dims : TStPNBarCodeDims;
|
539 |
R1,
|
540 |
R2 : TRect;
|
541 |
|
542 |
Info : PBitMapInfo;
|
543 |
InfoSize : DWORD;
|
544 |
ImageSize : DWORD;
|
545 |
Image : Pointer;
|
546 |
begin
|
547 |
ACanvas := TCanvas.Create;
|
548 |
Bmp := TBitmap.Create;
|
549 |
ACanvas.Handle := DC;
|
550 |
try
|
551 |
ComputeSizes(ACanvas, pnbcDefRes, Dims);
|
552 |
Bmp.Height := Dims.Height;
|
553 |
Bmp.Width := Dims.Width;
|
554 |
R1 := Rect(0, 0, Dims.Width, Dims.Height);
|
555 |
R2 := Rect(Position.X, Position.Y,
|
556 |
Dims.Width + Position.X,
|
557 |
Dims.Height + Position.Y);
|
558 |
|
559 |
DrawBarCode(Bmp.Canvas, Dims);
|
560 |
|
561 |
{Delphi does not allow a simple Canvas.CopyRect to the printer Canvas}
|
562 |
with Bmp do begin
|
563 |
GetDIBSizes(Handle, InfoSize, ImageSize);
|
564 |
GetMem(Info, InfoSize);
|
565 |
try
|
566 |
GetMem(Image, ImageSize);
|
567 |
try
|
568 |
GetDIB(Handle, Palette, Info^, Image^);
|
569 |
with Info^.bmiHeader do begin
|
570 |
StretchDIBits(ACanvas.Handle,
|
571 |
R2.Left, R2.Top, Dims.Width, Dims.Height,
|
572 |
0, 0, biWidth, biHeight,
|
573 |
Image, Info^, DIB_RGB_COLORS, SRCCOPY);
|
574 |
end;
|
575 |
finally
|
576 |
FreeMem(Image, ImageSize)
|
577 |
end;
|
578 |
finally
|
579 |
FreeMem(Info, InfoSize);
|
580 |
end;
|
581 |
end;
|
582 |
finally
|
583 |
Bmp.Free;
|
584 |
ACanvas.Free;
|
585 |
end;
|
586 |
end;
|
587 |
|
588 |
|
589 |
|
590 |
procedure TStPNBarCode.SaveToFile(ACanvas : TCanvas;
|
591 |
const FileName : string);
|
592 |
var
|
593 |
Bmp : TBitmap;
|
594 |
Dims : TStPNBarCodeDims;
|
595 |
begin
|
596 |
Bmp := TBitmap.Create;
|
597 |
try
|
598 |
ComputeSizes(ACanvas, pnbcDefRes, Dims);
|
599 |
Bmp.Height := Dims.Height;
|
600 |
Bmp.Width := Dims.Width;
|
601 |
DrawBarCode(Bmp.Canvas, Dims);
|
602 |
Bmp.SaveToFile(FileName);
|
603 |
finally
|
604 |
Bmp.Free;
|
605 |
end;
|
606 |
end;
|
607 |
|
608 |
|
609 |
|
610 |
procedure TStPNBarCode.SaveToFileRes(Res : TStPNBarCodeRes;
|
611 |
const FileName : string);
|
612 |
var
|
613 |
Bmp : TBitmap;
|
614 |
Dims : TStPNBarCodeDims;
|
615 |
begin
|
616 |
Bmp := TBitmap.Create;
|
617 |
try
|
618 |
ComputeSizes(Bmp.Canvas, Res, Dims);
|
619 |
Bmp.Height := Dims.Height;
|
620 |
Bmp.Width := Dims.Width;
|
621 |
DrawBarCode(Bmp.Canvas, Dims);
|
622 |
Bmp.SaveToFile(FileName);
|
623 |
finally
|
624 |
Bmp.Free;
|
625 |
end;
|
626 |
end;
|
627 |
|
628 |
end.
|