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104 lines
3.2 KiB
104 lines
3.2 KiB
/***************************************************************************
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barkodeengine.h - description
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-------------------
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begin : Fri Nov 05 2004
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copyright : (C) 2002 by Dominik Seichter
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email : domseichter@web.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef BARKODEENGINE_H
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#define BARKODEENGINE_H
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/**
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* The different generator backends / engines
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*/
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typedef enum { GNU_BARCODE, PDF417, TBARCODE, TBARCODE2, PIXMAP, PURE_POSTSCRIPT, NONE } EEngine;
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class Barkode;
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class TQDomElement;
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class TQPainter;
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/** An interface for additional special options
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* supported by a BarkodeEngine
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*/
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class BarkodeEngineOptions {
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public:
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BarkodeEngineOptions() {};
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virtual ~BarkodeEngineOptions() {};
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virtual void defaults() = 0;
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virtual void load( const TQDomElement* tag ) = 0;
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virtual void save( TQDomElement* tag ) = 0;
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};
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#include <tqsize.h>
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/**
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* Inherit from this class if you want to create a
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* (barkode engine) for use with KBarcode.
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* @author Dominik Seichter
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*/
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class BarkodeEngine{
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public:
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BarkodeEngine();
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virtual ~BarkodeEngine();
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virtual const BarkodeEngine & operator=( const BarkodeEngine & rhs ) = 0;
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virtual EEngine engine() const = 0;
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virtual void update( const TQPaintDevice* device ) = 0;
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virtual const TQSize size() const = 0;
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void setBarkode( Barkode* b ) { barkode = b; }
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virtual void drawBarcode( TQPainter & painter, int x, int y ) = 0;
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/** @returns a pointer to a BarkodeEngineOptions object
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* if this BarkodeEngine has one. Otherwise null is returned.
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* The returned object has to be casted down to the concrete object
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* you want to use, before setting any of the options.
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*/
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virtual BarkodeEngineOptions* options();
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protected:
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Barkode* barkode;
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TQSize m_size;
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bool m_valid;
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};
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/** A barcode engine with implemented empty and does
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* nothing
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*/
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class EmptyEngine : public BarkodeEngine {
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public:
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EmptyEngine();
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virtual inline const BarkodeEngine & operator=( const BarkodeEngine & rhs );
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virtual inline EEngine engine() const;
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virtual void update( const TQPaintDevice* device );
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virtual const TQSize size() const;
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virtual void drawBarcode( TQPainter & painter, int x, int y );
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};
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const BarkodeEngine & EmptyEngine::operator=( const BarkodeEngine & )
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{
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return *this;
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}
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EEngine EmptyEngine::engine() const
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{
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return NONE;
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}
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#endif
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