org.krysalis.barcode4j.impl.DefaultTwoDimCanvasLogicHandler Maven / Gradle / Ivy
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Barcode4J is a flexible generator for barcodes written in Java.
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/*
* Copyright 2006 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.BarGroup;
import org.krysalis.barcode4j.BarcodeDimension;
import org.krysalis.barcode4j.TwoDimBarcodeLogicHandler;
import org.krysalis.barcode4j.output.Canvas;
/**
* Default 2D Logic Handler implementation for painting on a Canvas.
*
* @author Jeremias Maerki
* @version $Id: DefaultTwoDimCanvasLogicHandler.java,v 1.1 2006/06/22 09:01:19 jmaerki Exp $
*/
public class DefaultTwoDimCanvasLogicHandler implements TwoDimBarcodeLogicHandler {
private AbstractBarcodeBean bcBean;
private Canvas canvas;
private double x = 0.0;
private double y = 0.0;
/**
* Main constructor.
* @param bcBean the barcode implementation class
* @param canvas the canvas to paint to
*/
public DefaultTwoDimCanvasLogicHandler(AbstractBarcodeBean bcBean, Canvas canvas) {
this.bcBean = bcBean;
this.canvas = canvas;
}
private double getStartX() {
if (bcBean.hasQuietZone()) {
return bcBean.getQuietZone();
} else {
return 0.0;
}
}
private double getStartY() {
if (bcBean.hasQuietZone()) {
return bcBean.getVerticalQuietZone();
} else {
return 0.0;
}
}
/** @see org.krysalis.barcode4j.ClassicBarcodeLogicHandler */
public void startBarcode(String msg, String formattedMsg) {
//Calculate extents
BarcodeDimension dim = bcBean.calcDimensions(msg);
canvas.establishDimensions(dim);
y = getStartY();
}
/** @see org.krysalis.barcode4j.TwoDimBarcodeLogicHandler#startRow() */
public void startRow() {
x = getStartX();
}
/** @see org.krysalis.barcode4j.ClassicBarcodeLogicHandler */
public void startBarGroup(BarGroup type, String submsg) {
//nop
}
/** @see org.krysalis.barcode4j.ClassicBarcodeLogicHandler */
public void addBar(boolean black, int width) {
final double w = bcBean.getBarWidth(width);
if (black) {
canvas.drawRectWH(x, y, w, bcBean.getBarHeight());
}
x += w;
}
/** @see org.krysalis.barcode4j.ClassicBarcodeLogicHandler */
public void endBarGroup() {
//nop
}
/** @see org.krysalis.barcode4j.TwoDimBarcodeLogicHandler#endRow() */
public void endRow() {
y += bcBean.getBarHeight(); //=row height
}
/** @see org.krysalis.barcode4j.ClassicBarcodeLogicHandler */
public void endBarcode() {
//nop
}
}