itextpdf-master/itext/src/main/java/com/itextpdf/text/pdf/PdfPTableEvent.java
/*
 *
 * This file is part of the iText (R) project.
    Copyright (c) 1998-2022 iText Group NV
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
 * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
 * OF THIRD PARTY RIGHTS
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf;

/** An interface that can be used to retrieve the position of cells in <CODE>PdfPTable</CODE>.
 *
 * @author Paulo Soares
 */
public interface PdfPTableEvent {
    
    /** This method is called at the end of the table rendering. The text or graphics are added to
     * one of the 4 <CODE>PdfContentByte</CODE> contained in
     * <CODE>canvases</CODE>.<br>
     * The indexes to <CODE>canvases</CODE> are:<p>
     * <ul>
     * <li><CODE>PdfPTable.BASECANVAS</CODE> - the original <CODE>PdfContentByte</CODE>. Anything placed here
     * will be under the table.
     * <li><CODE>PdfPTable.BACKGROUNDCANVAS</CODE> - the layer where the background goes to.
     * <li><CODE>PdfPTable.LINECANVAS</CODE> - the layer where the lines go to.
     * <li><CODE>PdfPTable.TEXTCANVAS</CODE> - the layer where the text go to. Anything placed here
     * will be over the table.
     * </ul>
     * The layers are placed in sequence on top of each other.
     * <p>
     * The <CODE>widths</CODE> and <CODE>heights</CODE> have the coordinates of the cells.<br>
     * The size of the <CODE>widths</CODE> array is the number of rows.
     * Each sub-array in <CODE>widths</CODE> corresponds to the x column border positions where
     * the first element is the x coordinate of the left table border and the last
     * element is the x coordinate of the right table border. 
     * If colspan is not used all the sub-arrays in <CODE>widths</CODE>
     * are the same.<br>
     * For the <CODE>heights</CODE> the first element is the y coordinate of the top table border and the last
     * element is the y coordinate of the bottom table border.
     * @param table the <CODE>PdfPTable</CODE> in use
     * @param widths an array of arrays with the cells' x positions. It has the length of the number
     * of rows
     * @param heights an array with the cells' y positions. It has a length of the number
     * of rows + 1
     * @param headerRows the number of rows defined for the header.
     * @param rowStart the first row number after the header
     * @param canvases an array of <CODE>PdfContentByte</CODE>
     */    
    public void tableLayout(PdfPTable table, float widths[][], float heights[], int headerRows, int rowStart, PdfContentByte[] canvases);

}

