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An Open Source JavaFX PDF Viewer
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2015 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* Scroll.java
* ---------------
*/
package org.jpedal.examples.viewer.commands;
import java.awt.Rectangle;
import org.jpedal.*;
import org.jpedal.display.Display;
import org.jpedal.examples.viewer.Values;
import org.jpedal.objects.PdfPageData;
/**
* Allows the user to scroll through the PDF document at a scroll interval
* scroll interval is default of 10 unless changed.
*/
public class Scroll {
public static void execute(final Object[] args, final Values commonValues, final PdfDecoderInt decode_pdf) {
if (args == null) {
} else {
final int[] scrollTo = (int[]) args[0];
int page = commonValues.getCurrentPage();
if (args.length > 1 && args[1] != null) {
page = (Integer) args[1];
}
if (scrollTo != null) {
rectToHighlight(scrollTo, page, decode_pdf);
//
}
}
}
public static void rectToHighlight(final int[] highlight, int page, final PdfDecoderInt decode_pdf) {
int x = 0, y = 0, w = 0, h = 0;
final int insetW = decode_pdf.getInsetW();
final int insetH = decode_pdf.getInsetH();
final float scaling = decode_pdf.getScaling();
final int scrollInterval = decode_pdf.getScrollInterval();
final int displayView = decode_pdf.getDisplayView();
if (page < 1 || page > decode_pdf.getPageCount() || displayView == Display.SINGLE_PAGE) {
page = decode_pdf.getPageNumber();
}
final PdfPageData pageData = decode_pdf.getPdfPageData();
final int cropW = pageData.getCropBoxWidth(page);
final int cropH = pageData.getCropBoxHeight(page);
final int cropX = pageData.getCropBoxX(page);
final int cropY = pageData.getCropBoxY(page);
switch (decode_pdf.getDisplayRotation()) {
case 0:
x = (int) ((highlight[0] - cropX) * scaling) + insetW;
y = (int) ((cropH - (highlight[1] - cropY)) * scaling) + insetH;
w = (int) (highlight[2] * scaling);
h = (int) (highlight[3] * scaling);
break;
case 90:
x = (int) ((highlight[1] - cropY) * scaling) + insetH;
y = (int) ((highlight[0] - cropX) * scaling) + insetW;
w = (int) (highlight[3] * scaling);
h = (int) (highlight[2] * scaling);
break;
case 180:
x = (int) ((cropW - (highlight[0] - cropX)) * scaling) + insetW;
y = (int) ((highlight[1] - cropY) * scaling) + insetH;
w = (int) (highlight[2] * scaling);
h = (int) (highlight[3] * scaling);
break;
case 270:
x = (int) ((cropH - (highlight[1] - cropY)) * scaling) + insetH;
y = (int) ((cropW - (highlight[0] - cropX)) * scaling) + insetW;
w = (int) (highlight[3] * scaling);
h = (int) (highlight[2] * scaling);
break;
}
if (displayView != Display.SINGLE_PAGE && displayView != Display.PAGEFLOW) {
x += decode_pdf.getPages().getXCordForPage(page);
y += decode_pdf.getPages().getYCordForPage(page);
}
//
}
}