com.vectorprint.report.itext.style.stylers.ImageAlign.java Source code

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Here is the source code for com.vectorprint.report.itext.style.stylers.ImageAlign.java

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/*
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package com.vectorprint.report.itext.style.stylers;

/*
 * #%L
 * VectorPrintReport4.0
 * %%
 * Copyright (C) 2012 - 2013 VectorPrint
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * 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 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/>.
 * #L%
 */
//~--- non-JDK imports --------------------------------------------------------
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.PdfPCell;
import com.vectorprint.VectorPrintException;
import com.vectorprint.report.itext.style.parameters.AlignParameter;
import com.vectorprint.report.itext.style.parameters.FloatParameter;
import static com.vectorprint.report.itext.style.stylers.DocumentSettings.WIDTH;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

//~--- JDK imports ------------------------------------------------------------
/**
 * align images in a cell, needed because horizontal align does not work for images in cells.
 *
 * @author Eduard Drenth at VectorPrint.nl
 */
public class ImageAlign extends AbstractStyler {

    public ImageAlign() {

        addParameter(new FloatParameter(WIDTH, "width of cell").setDefault(-1f), ImageAlign.class);
        addParameter(new AlignParameter(ALIGNPARAM, Arrays.asList(ALIGN.values()).toString())
                .setDefault(ALIGN.CENTER_MIDDLE), ImageAlign.class);
    }

    public PdfPCell style(PdfPCell cell, Object data) throws VectorPrintException {
        Image img = (Image) data;

        if (getWidth() <= 0) {
            throw new VectorPrintException("You need to specify width of the cell");
        }

        cell.setVerticalAlignment(getAlign().getVertical());

        float paddingLeft = (getWidth() - img.getWidth()) / 2;
        if (getAlign().getHorizontal() == PdfPCell.ALIGN_LEFT) {
            paddingLeft = 0;
        } else if (getAlign().getHorizontal() == PdfPCell.ALIGN_RIGHT) {
            paddingLeft = (getWidth() - img.getWidth());
        }

        cell.setPaddingLeft(paddingLeft);

        return cell;
    }

    @Override
    public <E> E style(E text, Object data) throws VectorPrintException {
        return (E) style((PdfPCell) text, data);
    }

    private static final Class<Object>[] classes = new Class[] { PdfPCell.class };
    private static final Set<Class> c = Collections.unmodifiableSet(new HashSet<Class>(Arrays.asList(classes)));

    @Override
    public Set<Class> getSupportedClasses() {
        return c;
    }

    public ALIGN getAlign() {
        return getValue(ALIGNPARAM, ALIGN.class);
    }

    public void setAlign(ALIGN align) {
        setValue(ALIGNPARAM, align);
    }

    public float getWidth() {
        return getValue(WIDTH, Float.class);
    }

    public void setWidth(float width) {
        setValue(WIDTH, width);
    }

    @Override
    public String getHelp() {
        return "Align an image in a cell." + " " + super.getHelp();
    }
}