org.jpedal.objects.acroforms.overridingImplementations.CustomImageIcon Maven / Gradle / Ivy

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Open Source (LGPL) JavaFX PDF Viewer
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/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2017 IDRsolutions and Contributors.
 *
 * This file is part of JPedal/JPDF2HTML5
 *
 @LICENSE@
 *
 * ---------------
 * CustomImageIcon.java
 * ---------------
 */

package org.jpedal.objects.acroforms.overridingImplementations;

import java.awt.Image;
import javax.swing.ImageIcon;

public class CustomImageIcon extends ImageIcon {
    private static final long serialVersionUID = 5003778613900628453L;

    /**
     * the maximum scaling factor difference between the rootImage and the current Form dimentions
     */
    protected static float MAXSCALEFACTOR = 1.5f;

    protected int iconWidth = -1;
    protected int iconHeight = -1;

    protected final int iconRotation;
    protected int iconOpp = 180;
    /**
     * the page rotation required for this image
     */
    protected int pageRotate;

    /**
     * used to tell praint method if we are displaying in single page mode,
     * if so we rotate here, if not rotate is handled elsewhere.
     */
    protected boolean displaySingle;

    /**
     * sets the scaling factor that the image has to change by before the root images are redraw to the current sizes.
     * i.e if scaling factor is 1.5 start with 50% image, it wont redraw the image until its abot 75% or below 33%
     * where as scaling factor of 1, means it will always redraw the image to the size required.
     */
    @SuppressWarnings("UnusedDeclaration")
    public static void setMaxScaleFactor(final float scaleFactor) {
        MAXSCALEFACTOR = scaleFactor;
    }

    public CustomImageIcon(final int iconRot) {
        iconRotation = iconRot;
        iconOpp = iconRotation - 180;
        if (iconOpp < 0) {
            iconOpp += 360;
        }
    }

    public void setAttributes(final int newWidth, final int newHeight, final int pageRotation, final boolean displaySing) {
        //recalculate rotationVal
        final int finalRotation = validateRotationValue(pageRotation - iconRotation);

        pageRotate = pageRotation;

        if (finalRotation == iconRotation || finalRotation == iconOpp) {
            iconWidth = newWidth;
            iconHeight = newHeight;
        } else { //the final rotation is out by 90 relative to the icon rotation
            //turn the width and height round so that the bufferedimage is the correct orientation
            //this is relative to the final rotation
            iconWidth = newHeight;
            iconHeight = newWidth;
        }

        displaySingle = displaySing;
    }

    protected static int validateRotationValue(int rotation) {
        //make sure is between 0 and 360
        rotation %= 360;
        //if negative make positive
        if (rotation < 0) {
            rotation += 360;
        }

        return rotation;
    }

    @Override
    public int getIconHeight() {
        if (iconHeight == -1) {
            final Image image = getImage();

            if (image == null) {
                return -1;
            } else {
                return image.getHeight(null);
            }
        } else {
            return iconHeight;
        }
    }

    @Override
    public int getIconWidth() {
        if (iconWidth == -1) {
            final Image image = getImage();

            if (image == null) {
                return -1;
            } else {
                return image.getWidth(null);
            }
        } else {
            return iconWidth;
        }
    }
}