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Barcode4J is a flexible generator for barcodes written in Java.
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/*
 * Copyright 2004,2008 Jeremias Maerki.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.krysalis.barcode4j.impl;

import org.krysalis.barcode4j.TextAlignment;
import org.krysalis.barcode4j.output.Canvas;
import org.krysalis.barcode4j.tools.UnitConv;

/**
 * Drawing utilities.
 *
 * @author Jeremias Maerki
 * @version $Id: DrawingUtil.java,v 1.2 2008-05-13 13:00:45 jmaerki Exp $
 */
public class DrawingUtil {

    /**
     * Draws a centered character on a canvas.
     *
     * @param canvas the canvas to paint on
     * @param bean   the barcode bean to get the font settings from
     * @param ch     the character
     * @param x1     the left boundary
     * @param x2     the right boundary
     * @param y1     the y coordinate of the font's baseline
     */
    public static void drawCenteredChar(Canvas canvas, AbstractBarcodeBean bean,
                char ch,
                double x1, double x2, double y1) {
        canvas.drawCenteredChar(ch, x1, x2,
                    y1 - UnitConv.pt2mm(bean.getFontSize()) * 0.2,
                    bean.getFontName(), bean.getFontSize());
    }

    /**
     * Draws justified text on a canvas.
     *
     * @param canvas the canvas to paint on
     * @param bean   the barcode bean to get the font settings from
     * @param text   the text to paint
     * @param x1     the left boundary
     * @param x2     the right boundary
     * @param y1     the y coordinate of the font's baseline
     * @deprecated Use {@link #drawText(Canvas, AbstractBarcodeBean, String, double, double, double, TextAlignment)} instead.
     */
    public static void drawJustifiedText(Canvas canvas, AbstractBarcodeBean bean,
                String text,
                double x1, double x2, double y1) {
        drawText(canvas, bean, text, x1, x2, y1, TextAlignment.TA_JUSTIFY);
    }

    /**
     * Draws centered text on a canvas.
     *
     * @param canvas the canvas to paint on
     * @param bean   the barcode bean to get the font settings from
     * @param text   the text to paint
     * @param x1     the left boundary
     * @param x2     the right boundary
     * @param y1     the y coordinate of the font's baseline
     * @deprecated Use {@link #drawText(Canvas, AbstractBarcodeBean, String, double, double, double, TextAlignment)} instead.
     */
    public static void drawCenteredText(Canvas canvas, AbstractBarcodeBean bean,
                String text,
                double x1, double x2, double y1) {
        drawText(canvas, bean, text, x1, x2, y1, TextAlignment.TA_CENTER);
    }

    /**
     * Draws text on a canvas.
     *
     * @param canvas    the canvas to paint on
     * @param bean      the barcode bean to get the font settings from
     * @param text      the text to paint
     * @param x1        the left boundary
     * @param x2        the right boundary
     * @param y1        the y coordinate of the font's baseline
     * @param textAlign the text alignment
     */
    public static void drawText(Canvas canvas, AbstractBarcodeBean bean,
                String text,
                double x1, double x2, double y1,
                TextAlignment textAlign) {
        canvas.drawText(text, x1, x2,
                    y1 - UnitConv.pt2mm(bean.getFontSize()) * 0.2,
                    bean.getFontName(), bean.getFontSize(),
                    textAlign);
    }

}