Difference polygonRoi ij version 1.29 vs. 1.35 ??

[KarlHz]

Hello all,

I ran into a problem which I cannot solve on my own and I found not help in the maillist archives.

I developed a plugin for version 1.29 back in 2002 which does not work any longer with the current version 1.35. There must be some difference I cannot figure out myself.

I want to get the x,y coordinate of the bounding box of a polyline.
When I use a polygon it works fine, but not with the polyline.
In version 1.29 this approach worked as I expected it.

For ease of explanation I add the source of a reduced plugin.

I would apreciate any hint which helps me to solve this problem very much.

Thank you for your help

Sincerely

KarlHz


/**
 *  23.2.2006
 * This is a test-file only. It does not do anything meaningful.
 * I prepared it to demonstrate my problem.
 *
 * I want to get the x- and y-coordinate of the bounding box of a polyline ROI which I draw into the image
 * According to my understanding of the documentation there should be no difference between a polyline and a polygon
 * concerning the calls I use in this example.
 *
 * But in all my tests I get the x- and y-coordinate of a polygon ROI correctly.
 * However, as soon as I replace the polygon with a polyline I get only zeros for the x and y coordinate.
 * And I cannot find the reason.
 *
 * I used the same approach with verion 1.29k and and it worked when I developed this the first time in 2002 and even now the same class file works as I expect it with this version but not in version 1.35q.
 */
 
 // I did not remove the libraries which are not necessary here because I need them in my real application
 
import ij.IJ;
import ij.ImagePlus;
import ij.gui.NewImage;
import ij.gui.PolygonRoi;
import ij.gui.Roi;
import ij.plugin.filter.PlugInFilter;
import ij.process.ImageProcessor;

import ij.util.Tools;

import java.awt.Point;
import java.awt.Polygon;
import java.awt.Rectangle;



public class TestRoi_ implements PlugInFilter {

        static ImagePlus orgImg;

        public int setup(String arg, ImagePlus imp) {
                orgImg = imp;
                return DOES_8G+DOES_32;
        }

// I draw the ROI into the image before this plugin is called
// a polyline would be fine because I want to mark a sawline
// a polygon will work too but is not so nice

        public void run(ImageProcessor ip) {

                Rectangle rectRoi = ip.getRoi();

                PolygonRoi polyRoi;
                polyRoi = (PolygonRoi) orgImg.getRoi();
                               
       
                int roiX = rectRoi.x;
                int roiY = rectRoi.y;
                int roiWidth = rectRoi.width;
                int roiHeight = rectRoi.height;

// when I use a polygon everything is as expected and I get the coordinates of the bounding box
// when I use a polyline I always get x,y = 0,0 and the width and height of the image orgImg
// this works different with version 1.29 - there it is as expected.

                System.out.println("roiX: " + roiX);
                System.out.println("roiY: " + roiY);
                System.out.println("roiWidth: " + roiWidth);
                System.out.println("roiHeight: " + roiHeight);


        }

        void showAbout() {
                IJ.showMessage("About ...","This PlugIn does ...!");
        }


}