sizingoutput.java

这是个国外JAVA爱好者写的条形码生成器

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 * Copyright (c) 2003, International Barcode Consortium
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this list of
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 * Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 * Neither the name of the International Barcode Consortium nor the names of any contributors may be used to endorse
 * or promote products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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package net.sourceforge.barbecue.output;

import java.awt.*;


/**
 * The <code>SizingOutput</code> class is used to calculate the size of a barcode.
 * <P>
 * This class will not generate any output.
 * <P>
 */
public class SizingOutput extends AbstractOutput {
    private java.awt.FontMetrics fm;
    
    public SizingOutput(Font font, Color fgColor, Color bgColor) {
        super(font, false, 1.0, fgColor, bgColor);
    }
    
    public SizingOutput(Font font, java.awt.FontMetrics fm, Color fgColor, Color bgColor) {
        super(font, false, 1.0, fgColor, bgColor);
        this.fm = fm;
    }
    
    /**
     * "Draws" a bar at the given coordinates.
     * @param x the x coordinate
     * @param y the y coordinate
     * @param width the width
     * @param height the height
     * @param paintWithForegroundColor if true, use the foreground color, otherwise use the background color
     * @return the width of the bar drawn
     */
    public int drawBar(int x, int y, int width, int height, boolean paintWithForegroundColor) {
        return (int)width;
    }
    
    /**
     * Sets up the drawing environment.  Called before drawBar().  Matched with call to
     * endDraw() at the end.  This allows for caching as needed.
     */
    public void beginDraw() {
    }
    
    /**
     * Balanced with startDraw() above, used for caching, output of epilogues (for
     * SVG), etc.
     * @param width The output width (in pixels) of the barcode
     * @param height The output height (in pixels) of the barcode.
     */
    public void endDraw(int width, int height) {
    }

	public int drawText(String text, LabelLayout labelLayout) throws OutputException {
		if(font == null || fm == null) {
            return 0;
        }
		// TODO: This is incorrect
		return fm.getAscent() + fm.getDescent() + fm.getLeading();
	}

	/**
     * Paint the background the background colour, based on the height and the width.
     * @param x the x coordinate
     * @param y the y coordinate
     * @param width the width to be painted
     * @param height the height to be painted
     */
    public void paintBackground(int x, int y, int width, int height) {
    }
}