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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
*
* ---------------
* MouseSelector.java
* ---------------
*/
package org.jpedal.examples.viewer.gui;
import org.jpedal.PdfDecoderInt;
import org.jpedal.display.Display;
import org.jpedal.examples.viewer.Values;
import org.jpedal.objects.PdfPageData;
/**
*
*/
public class MouseSelector {
/**
* adjusty x co-ordinate shown in display for user to include any page
* centering
*/
protected static int adjustForAlignment(int cx, final PdfDecoderInt decode_pdf) {
if (decode_pdf.getPageAlignment() == Display.DISPLAY_CENTERED) {
final int width = decode_pdf.getPaneBounds()[0];
int pdfWidth = decode_pdf.getPDFWidth();
if (decode_pdf.getDisplayView() != Display.SINGLE_PAGE) {
pdfWidth = decode_pdf.getMaxSizeWH()[0];
}
if (width > pdfWidth) {
cx -= ((width - pdfWidth) / (2));
}
}
return cx;
}
/**
* get raw co-ords and convert to correct scaled units
*
* @return int[] of size 2, [0]=new x value, [1] = new y value
*/
protected static int[] updateXY(final int originalX, final int originalY, final PdfDecoderInt decode_pdf, final Values commonValues) {
final PdfPageData page_data = decode_pdf.getPdfPageData();
final int mediaW = page_data.getMediaBoxWidth(commonValues.getCurrentPage());
final int mediaH = page_data.getMediaBoxHeight(commonValues.getCurrentPage());
final int cropX = page_data.getCropBoxX(commonValues.getCurrentPage());
final int cropY = page_data.getCropBoxY(commonValues.getCurrentPage());
final int cropW = page_data.getCropBoxWidth(commonValues.getCurrentPage());
final int cropH = page_data.getCropBoxHeight(commonValues.getCurrentPage());
final float scaling = page_data.getScalingValue();
final int rotation = page_data.getRotation(commonValues.getCurrentPage());
//float scaling=currentGUI.getScaling();
final int inset = GUI.getPDFDisplayInset();
//int rotation=currentGUI.getRotation();
//get co-ordinates of top point of outine rectangle
int x = (int) (((adjustForAlignment(originalX, decode_pdf)) - inset) / scaling);
int y = (int) ((originalY - inset) / scaling);
//undo any viewport scaling
if (commonValues.maxViewY != 0) { // will not be zero if viewport in play
x = (int) (((x - (commonValues.dx * scaling)) / commonValues.viewportScale));
y = (int) ((mediaH - ((mediaH - (y / scaling) - commonValues.dy) / commonValues.viewportScale)) * scaling);
}
final int[] ret = new int[2];
if (rotation == 90) {
ret[1] = x + cropY;
ret[0] = y + cropX;
} else if ((rotation == 180)) {
ret[0] = mediaW - (x + mediaW - cropW - cropX);
ret[1] = y + cropY;
} else if ((rotation == 270)) {
ret[1] = mediaH - (x + mediaH - cropH - cropY);
ret[0] = mediaW - (y + mediaW - cropW - cropX);
} else {
ret[0] = x + cropX;
ret[1] = mediaH - (y + mediaH - cropH - cropY);
}
return ret;
}
}